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Encyclopedia > Trans Neptunian object
TNOs and similar bodies

A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. The Kuiper belt, Scattered disk, and Oort cloud are names for three divisions of this volume of space. Pluto and its moon Charon are trans-Neptunian objects, and if Pluto had been discovered today, it might not have been called a planet. (See the definition of planet.) The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... Adjective Neptunian Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... A cubewano is any substantial Kuiper belt object, orbiting beyond about 41 AU and not controlled by resonances with the outer planets. ... In astronomy, a plutino is a trans-Neptunian object that has a 3:2 orbital resonance with Neptune. ... While a Plutino completes 2 orbits around the Sun in the time it takes Neptune to complete 3 orbits, a Twotino makes 1 orbit around the Sun in the time it takes Neptune to complete 2 orbits. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... In physics, an orbit is the path that an object makes, around another object, whilst under the influence of a source of centripetal force, such as gravity. ... Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... Atmospheric characteristics Atmospheric pressure 0. ... Media:Example. ... A planet is generally considered to be a relatively large mass of accreted matter in orbit around a star. ... The planet Neptune and its moon Triton, taken by Voyager 2 as it entered the outer solar system The definition of planet has proven elusive despite the term being one of the best-known astronomical words. ...


The orbit of each of the planets is affected by the gravitational influences of all the other planets. Discrepancies in the early 1900s between the observed and expected orbits of the known planets suggested that there were one or more additional planets beyond Neptune (see Planet X). The search for these led to the discovery of Pluto. Pluto is too small to explain the discrepancies, however, and revised estimates of Neptune's mass showed that the problem was spurious. Gravity is a force of attraction that acts between bodies that have mass. ... // Events and Trends Technology First flight by the Wright brothers, December 17, 1903. ... Planet X was a large hypothetical planet orbiting beyond the orbit of Neptune. ...


It took more than 60 years to discover another TNO (with only the discovery of Pluto’s moon Charon in between). Since 1992 however, more than 1000 objects have been discovered, differing in sizes, orbits and surface composition. Media:Example. ...

Contents


Distribution and Classification

Distribution of trans-Neptunian Objects.
Distribution of trans-Neptunian Objects.

The diagram illustrates the distribution of known trans-Neptunian objects (up to 70 AU) in relation to the orbits of the planets together with Centaurs for reference. Different classes are repesented in different colours. Objects in orbital resonance with Neptune are plotted in red: (Neptune Trojans, plutinos, twotinos and a number of smaller families). The term Kuiper belt re-groups classical objects (cubewanos, in blue) with plutinos and twotinos (in red). Image File history File links TheTransneptunians_73AU.svg // Summary (voir plus loin pour la description en français) The distribution and classification of the trans-Neptunian Objects. ... Image File history File links TheTransneptunians_73AU.svg // Summary (voir plus loin pour la description en français) The distribution and classification of the trans-Neptunian Objects. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... In celestial mechanics, an orbital resonance occurs when two orbiting bodies exert a regular, periodic gravitational influence on each other. ... Adjective Neptunian Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... In astronomy, a plutino is a Pluto-like object, insofar as it has the same relative orbit as Pluto. ... While a Plutino completes 2 orbits around the Sun in the time it takes Neptune to complete 3 orbits, a Twotino makes 1 orbit around the Sun in the time it takes Neptune to complete 2 orbits. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... A cubewano is any substantial Kuiper belt object, orbiting beyond about 41 AU and not controlled by resonances with the outer planets. ...


The scattered disk extends to the right, far beyond the diagram, with known objects at mean distances beyond 500 AU (Sedna) and aphelia beyond 1,000 AU ( (87269) 2000 OO67).
The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... 2000 OO67 is a Trans Neptunian Object notable for its highly eccentric orbit. ...


Notable trans-Neptunian objects

A fuller list of objects is being compiled in the List of trans-Neptunian objects. Atmospheric characteristics Atmospheric pressure 0. ... A planet is generally considered to be a relatively large mass of accreted matter in orbit around a star. ... The planet Neptune and its moon Triton, taken by Voyager 2 as it entered the outer solar system The definition of planet has proven elusive despite the term being one of the best-known astronomical words. ... Media:Example. ... Moons of solar system scaled to Earths Moon A natural satellite is a moon (not capitalized), that is, any natural object that orbits a planet. ... (15760) 1992 QB1 (also written (15760) 1992 QB1) was the first trans-Neptunian object to be discovered after Pluto and Charon. ... A cubewano is any substantial Kuiper belt object, orbiting beyond about 41 AU and not controlled by resonances with the outer planets. ... (15874) 1996 TL66 is a trans-Neptunian object that resides in the Kuyper belt. ... A scattered disk object (or scattered disc object or SDO) is a trans-Neptunian object of the Kuiper belt with a very eccentric orbit. ... (48639) 1995 TL8 (also written (48639) 1995 TL8) is a trans-Neptunian object of the Scattered disk object subclass, and posesses a very large satellite. ... 1993 RO is a trans-Neptunian object of the Plutino class. ... In astronomy, a plutino is a trans-Neptunian object that has a 3:2 orbital resonance with Neptune. ... Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ... (Redirected from (20000) Varuna) 20000 Varuna (VAR oo na) is a Kuiper Belt object about 1060 kilometers in diameter, estimated from a combination of thermal and optical measurements. ... This article is about the trans-Neptunian object. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... 38628 Huya (original provisional designation: 2000 EB173) is a trans-Neptunian object (TNO). ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... This diagram shows the presumed distance of the Oort cloud compared to the rest of the solar system. ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ... The correct title of this article is 2004 XR190. ... This is a partial list of numbered trans-Neptunian objects (TNOs), in order of discovery date. ...


1Included in extended scattered disk by Jewitt (see References).


Physical characteristics

Some TNOs are thought to be lumps of ice with some organic (carbon-containing) material such as tholin, detected using spectroscopy. They are of the same composition as comets and many astronomers believe them to be just comets. The distinction between comet and asteroid is not yet clear and there is a substantial uncertainty, nutured by objects like 2060 Chiron and 133P/Elst-Pizarro. On the other hand, the recently confirmed high density of 2003 EL61 (2.6-3.3 g/cm3) suggests a very high non-ice content (compare with Pluto's density: 2.0 g/cm3). Benzene An organic compound is any member of a large class of chemical compounds whose molecules contain carbon, with the exception of carbides, carbonates, carbon oxides and elementary carbon. ... General Name, Symbol, Number carbon, C, 6 Chemical series nonmetals Group, Period, Block 14, 2, p Appearance black (graphite) colorless (diamond) Atomic mass 12. ... Tholin is a heteropolymer formed by solar ultraviolet irradiation of simple organic compounds such as methane or ethane. ... Extremely high resolution spectrum of the Sun showing thousands of elemental absorption lines (fraunhofer lines) Spectroscopy is the study of spectra, that is, the dependence of physical quantities on frequency. ... Comet Hale-Bopp For other uses, see Comet (disambiguation). ... 2060 Chiron (IPA: ) is an object in the outer solar system with an orbit between those of Saturn and Uranus and a radius of 71±5 km [1]. Although it was initially classified as an asteroid, later dispute arose as to whether it was an asteroid or actually a comet. ... Comet Elst-Pizarro is a periodic comet (formally designated 133P/Elst-Pizarro). ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ...


Given the apparent magnitude (>20) of all but the biggest trans-Neptunian objects, the physical studies are limited to the following:

Studying colours and spectra provides insight into the objects' origin and a potential correlation with other classes of objects, namely centaurs and some satellites of giant planets (Triton, Phoebe), suspected to originate in the Kuiper Belt. However, the interpretations are typically ambiguous as the spectra can fit more than one model of the surface composition and depend on the unknown particle size. More significantly, the optical surfaces of small bodies are subject to modification by intense radiation, solar wind and micrometeorites. Consequently, the thin optical surface layer could be quite different from the regolith underneath , and not representative of the bulk composition of the body. Shanil Davendra Singh rules 4 life! ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... The visible spectrum is the portion of the optical spectrum (light or electromagnetic spectrum) that is visible to the human eye. ... Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... Triton (trye-tÉ™n, IPA , Greek Τρίτων), or Neptune I, is the planet Neptunes largest moon. ... For other meanings see Phoebe. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... The plasma in the solar wind meeting the heliopause For the British comic, see Solar Wind (comic). ... A Micrometeoroid (also micrometeorite, micrometeor) is a tiny meteoroid; a small particle of rock from space, usually weighing less than a gram, that poses a threat to space exploration. ... Regolith (Greek: blanket rock) is a layer of loose, heterogeneous material covering solid rock. ...


Colours

Colours of the Transneptunians.
Colours of the Transneptunians.

Like Centaurs, TNO display a wide range of colours from blue-grey to very red but unlike the centaurs, clearly re-grouped into two classes, the distribution appears to be uniform.[3] Image File history File links TheTransneptunians_Color_Distribution. ... Image File history File links TheTransneptunians_Color_Distribution. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ...


Colour indices are simple measures of the differences of the apparent magnitude of an object seen through blue (B), visible (V) i.e. green-yellow and red (R) filters. The diagram illustrates known colour indices for all but the biggest objects (in slightly enhanced colour).[4] For reference, two moons: Triton and Phoebe, the centaur Pholus and planet Mars are plotted (yellow labels, size not to scale). // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... Triton (trye-tÉ™n, IPA , Greek Τρίτων), or Neptune I, is the planet Neptunes largest moon. ... For other meanings see Phoebe. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... In Greek mythology, Pholus was a wise centaur and friend of Herakles. ... For the Roman god, see Mars (mythology). ...


Correlations between the colours and the orbital characteristics have been studied, to confirm theories of different origin of the different dynamic classes.


Classical objects


Classical objects seem to be composed of two different colour populations: so called cold (inclination <5°) displaying only red colours and hot (higher inclination) population displaying the whole range of colours from blue to very red. [5] A cubewano is any substantial Kuiper belt object, orbiting beyond about 41 AU and not controlled by resonances with the outer planets. ...


Scattered disk objects


Scattered disk objects show colour resemblances with hot classical objects pointing to a common origin. The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ...


The biggest objects

Illustration of the relative sizes, albedos and colours of the largest TNOs.
Illustration of the relative sizes, albedos and colours of the largest TNOs.

Characteristically, big (bright) objects are typically on inclined orbits, while the invariable plane re-groups mostly small and dim objects. With the exception of Sedna, all big TNOs: 2003 UB313, 2005 FY9, 2003 EL61, Charon, and Orcus display neutral colour (infrared index V-I < 0.2), while the relatively dimmer bodies (50000 Quaoar, Ixion, 2002 AW197, and Varuna), as well as the population as the whole, are reddish (V-I in 0.3 to 0.6 range). This distinction leads to suggestion that the surface of the largest bodies is covered with ices, hiding the redder, darker areas underneath.[1] Image File history File links TheTransneptunians_Size_Albedo_Color. ... Image File history File links TheTransneptunians_Size_Albedo_Color. ... The invariable plane of the solar system is the plane passing through its barycenter (center of mass) which is perpendicular to its angular momentum vector, about 98% of which is contributed by the orbital angular momenta of the four jovian planets (Jupiter, Saturn, Uranus, and Neptune). ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... Media:Example. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... Artists impression by G. Bacon of STScI / NASA 50000 Quaoar (pronounced kwah·war, kwah·wor, or kwow·ur, Tongva ) [1] is a Trans-Neptunian object orbiting the Sun in the Edgeworth-Kuiper belt. ... (28978) Ixion (ik·sye·un) is a Kuiper belt object discovered on May 22, 2001 with a diameter of < 822 km and a semimajor axis of about 39. ... (55565) 2002 AW197 (also written: (55565) 2002 AW197) is a trans-Neptunian object. ... 20000 Varuna (VAR oo na) is a Kuiper Belt object about 1060 km in diameter, estimated from a combination of thermal and optical measurements. ...


The diagram illustrates the relative sizes, albedos and colours of the biggest TNOs. Also shown, are the known satellites and the exceptional shape of 2003 EL61 resulting from its rapid rotation. The arc around 2005 FY9 represents uncertainty given its unknown albedo. The size of 2003 UB313 follows Brown’s measure (2400 km) based on HST point spread model. The arc around it represents the thermal measure (3000 km) by Bertoldi (see the related section of the article for the references). 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... The Hubble Space Telescope (HST) is a telescope in orbit around the Earth. ... The point spread function (PSF) defines the propagation of electromagnetic radiation from a point source. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ...


Spectra

The objects present wide range of spectra, differing in reflectivity in visible red and near infrared. Neutral objects present a flat spectrum, reflecting as much red and infrared as visible spectrum.[6] Very red objects present a steep slope, reflecting much more in red and infrared. A recent attempt at classification (common with Centaurs) uses the total of four classes from BB (blue, average B-V=0.70, V-R=0.39 e.g. Orcus) to RR (very red, B-V=1.08, V-R=0.71, e.g. Sedna) with BR and IR as intermediate classes. BR and IR differ mostly in the infrared bands I, J and H. 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... Infrared astronomy is the branch of astronomy and astrophysics which deals with objects visible in infrared (IR) radiation. ...


Typical models of the surface include water ice, amorphous carbon, silicates and organic macromolecules, named tholins, created by intense radiation. Four major tholins are used to fit the reddening slope: Amorphous carbon is the name used for carbon that does not have any crystalline structure. ... In chemistry, a silicate is a compound consisting of silicon and oxygen (SixOy), one or more metals, and possibly hydrogen. ... Tholin is a heteropolymer formed by solar ultraviolet irradiation of simple organic compounds such as methane or ethane. ...

  • Titan tholin, believed to be produced from a mixture of 90% N2 and 10% CH4 (gaseous methane)
  • Triton tholin, as above but with very low (0.1%) methane content
  • (ethane) Ice tholin I, believed to be produced from a mixture of 86% H2O and 14% C2H6 (ethane)]
  • (methanol) Ice tholin II, 80% H2O, 16% CH3OH (methanol) and 3% CO2

As an illustration of the two extreme classes BB and RR, the following compositions have been suggested The simplest hydrocarbon, methane, is a gas with a chemical formula of CH4. ... Ethane is a chemical compound with chemical formula C2H6. ... Methanol, also known as methyl alcohol or wood alcohol, is a chemical compound with chemical formula CH3OH. It is the simplest alcohol, and is a light, volatile, colourless, flammable, poisonous liquid with a very faint odor. ...

  • for Sedna (RR very red): 24% Triton tholin, 7% carbon, 10%N2, 26% methanol, 33% methane
  • for Orcus (BB, grey/blue): 85% amorphous carbon +4% titan tholin, 11% H20 ice

Size determination

It is difficult to estimate the diameter of TNOs. For very large objects, with very well known orbital elements (namely, Pluto and Charon), diameters can be precisely measured by occultation of stars. For the geometric term, see diameter. ... In this July, 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. ...


For other large TNOs, diameters can be estimated by thermal measurements. The intensity of light illuminating the object is known (from its distance to the Sun), and one assumes that most of its surface is in thermal equilibrium (usually not a bad assumption for an airless body). For a known albedo, it is possible to estimate the surface temperature, and correspondingly the intensity of heat radiation. Further, if the size of the object is known, it is possible to predict both the amount of visible light and emitted heat radiation reaching the Earth. A simplifying factor is that the Sun emits almost all of its energy in visible light and at nearby freqencies, while at the cold temperatures of TNOs, the heat radiation is emitted at completely different wavelengths (the far infrared). Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of microwave radiation. ... Albedo is the measure of reflectivity of a surface or body. ...


Thus there are two unknowns (albedo and size), which can be determined by two independent measurements (of the amount of reflected light and emitted infrared heat radiation).


Unfortunately, TNOs are so far from the Sun that they are very cold, hence produce black-body radiation around 60 micrometres in wavelength. This wavelength of light is impossible to observe on the Earth's surface: astronomers thus observe the tail of the black-body radiation in the far infrared. This far infrared radiation is so dim that the thermal method is only applicable to the largest KBOs. For the majority of (small) objects, the diameter is estimated by assuming an albedo. However, the albedos found range from 0.50 down to 0.05 resulting, as example for magnitude of 1.0, in uncertainty from 1200 – 3700 km![3]. A micrometre (American spelling: micrometer), symbol µm, is an SI unit of length. ... The wavelength is the distance between repeating units of a wave pattern. ... In science, a magnitude is the numerical size of something: see orders of magnitude. ...


Largest discoveries

Size comparison between Earth's Moon (Luna) and several large TNOs
Size comparison between Earth's Moon (Luna) and several large TNOs

Currently lying at 97 AU away, the celestial body designated 2003 UB313 is the farthest known object in the solar system, and the third brightest of the TNOs. It was first imaged by Michael Brown of the California Institute of Technology on October 31, 2003 with the Samuel Oschin Telescope at Palomar Observatory near San Diego, California. It is classified as a Scattered Disc Object, and recently it has been argued that its sheer size in relation to the nine known planets mean that it can only be classified as a planet. The discovering astronomer conceded he and his team did not know the exact size of the new object, but its brightness and distance tell them that it is at least as large as Pluto, which measures 2,302 kilometres in diameter. Scientists later estimated that the object was at least 1 1/2 times as large as Pluto. If confirmed, the discovery would be the first of a planet-mass object since Pluto was identified in 1930. 2003 UB313 is 15 terametres (15 billion kilometres) from the Sun, which it orbits every 560 years at an unusual 45-degree angle. Image File history File links Created using a program written by Nicholas Shanks. ... The astronomical unit (AU or au or a. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... The California Institute of Technology (commonly referred to as Caltech) is a private, coeducational university located in Pasadena, California, in the United States. ... October 31 is the 304th day of the year (305th in leap years) in the Gregorian Calendar, with 61 days remaining. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... 1930 (MCMXXX) is a common year starting on Wednesday. ... A terametre (American spelling: terameter) (symbol: Tm) is a unit of length equal to 1012 metres. ... The word billion and its equivalents in other languages refer to either one million million or one thousand million, depending on whether the writer is using the long scale or the short scale. ...


In July, 2005, the American scientists submitted a name for the "new planet" to the International Astronomical Union, re-igniting the debate about whether or not Pluto should be considered a planet at all. Atmospheric characteristics Atmospheric pressure 0. ...



The brightest known TNOs (with absolute magnitudes < 4.0), are: In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us. ...

Permanent
Designation
Provisional
Designation
Absolute magnitude Albedo Equatorial diameter
(km)
Semimajor axis
(AU)
Class Discovery date Discoverer(s) Diameter method
2003 UB313 −1.2 ~0.55 ± 0.15(thermal) 3000 ± 400 67.7 SDO 2005 M. Brown, C. Trujillo & D. Rabinowitz thermal
Pluto −1.0 0.49 to 0.66 2306 ± 20 39.4 KBO 1930 C. Tombaugh occultation
2005 FY9 −0.3 0.8 ± 0.2 (assumed) 1800 ± 200 45.7 KBO 2005 M. Brown, C. Trujillo & D. Rabinowitz assumed albedo
2003 EL61 0.1 0.7 ± 0.1 ~1500 43.3 KBO 2005 M. Brown, C. Trujillo & D. Rabinowitz density inferred from rotation & oblate shape
Charon S/1978 P 1 1 0.36 to 0.39 1205 ± 2 39.4 KBO satellite 1978 J. Christy occultation
(90377) Sedna 2003 VB12 1.6 >0.2 (assumed) <1800, >1180 502.0 SDO? 2003 M. Brown, C. Trujillo & D. Rabinowitz thermal
(90482) Orcus 2004 DW 2.3 0.1 (assumed) ~1500 39.4 KBO 2004 M. Brown, C. Trujillo & D. Rabinowitz assumed albedo
(50000) Quaoar 2002 LM60 2.6 0.10 ± 0.03 1260 ± 190 43.5 KBO 2002 C. Trujillo & M. Brown disk resolved
(28978) Ixion 2001 KX76 3.2 0.25 – 0.50 400 – 550 39.6 KBO 2001 Deep Ecliptic Survey thermal
55636 2002 TX300 3.3 > 0.19 < 709 43.1 KBO 2002 NEAT thermal
55565 2002 AW197 3.3 0.14 – 0.20 650 – 750 47.4 KBO 2002 C. Trujillo, M. Brown, E. Helin, S. Pravdo, K. Lawrence & M. Hicks / Palomar Observatory thermal
55637 2002 UX25 3.6 0.08? ~910 42.5 KBO 2002 A. Descour / Spacewatch assumed albedo
(20000) Varuna 2000 WR106 3.7 0.12 – 0.30 1060 +180−220 43.0 KBO 2000 R. McMillan thermal
2002 MS4 3.8 0.1 (assumed) 730? 41.8 KBO assumed albedo
2003 MW12 3.8 0.1 (assumed) 730? 45.5 KBO assumed albedo
2003 AZ84 3.9 0.1 (assumed) 700? 39.6 KBO assumed albedo
84522 2002 TC302 3.9 > 0.03 < 1211 55.1 SDO 2002 NEAT thermal

The list has been sorted by increasing absolute magnitude. Estimated diameter is greatly affected by surface albedo which has often been assumed, not measured. Some potentially large Kuiper belt objects have not been included. In geometry, the semi-major axis (also semimajor axis) a applies to ellipses and hyperbolas. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... Atmospheric characteristics Atmospheric pressure 0. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... 1930 (MCMXXX) is a common year starting on Wednesday. ... Clyde William Tombaugh (February 4, 1906 – January 17, 1997) was an American astronomer who discovered the planet Pluto in 1930. ... In this July, 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... Media:Example. ... Moons of solar system scaled to Earths Moon A natural satellite is a moon (not capitalized), that is, any natural object that orbits a planet. ... 1978 (MCMLXXVIII) was a common year starting on Sunday (the link is to a full 1978 calendar). ... Headline text KJHFUIV ... In this July, 1997 still frame captured from video, the bright star Aldebaran has just reappeared on the dark limb of the waning crescent moon in this predawn occultation. ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... 2003 (MMIII) was a common year starting on Wednesday of the Gregorian calendar. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... This article is about the trans-Neptunian object. ... For album titles with the same name, see 2002 (album). ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... (Redirected from (28978) Ixion) 28978 Ixion (ik SIGH un, sometimes ICK see un) is a Kuiper belt object discovered on May 22, 2001 with a diameter of approximately 1055 km and a semimajor axis of about 39. ... 2001: A Space Odyssey. ... The Deep Ecliptic Survey is a project to find Kuiper belt objects, using the facilities of the National Optical Astronomy Observatory. ... The correct title of this article is (55636) 2002 TX300. ... For album titles with the same name, see 2002 (album). ... Near Earth Asteroid Tracking (NEAT) is a program run by NASA and Jet Propulsion Laboratory to discover near-Earth objects. ... (55565) 2002 AW197 (also written: (55565) 2002 AW197) is a trans-Neptunian object. ... For album titles with the same name, see 2002 (album). ... Chadwick A. Chad Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Kuiper belt and the outer solar system. ... Dr. Michael (Mike) E. Brown has been an associate professor of planetary astronomy at the California Institute of Technology (Caltech) since 2002. ... Eleanor Francis Helin is an American astronomer, principal investigator of the Near Earth Asteroid Tracking (NEAT) program of NASAs Jet Propulsion Laboratory. ... Kenneth J. Lawrence is an American astronomer. ... Palomar Observatory is a privately-owned observatory located in San Diego County, California, 90 miles (145 km) southeast of Mount Wilson Observatory, on Palomar Mountain. ... The correct title of this article is (55637) 2002 UX25. ... For album titles with the same name, see 2002 (album). ... Spacewatch is a project at the University of Arizona that specializes in the study of minor planets, and including various types of asteroids and comets. ... (Redirected from (20000) Varuna) 20000 Varuna (VAR oo na) is a Kuiper Belt object about 1060 kilometers in diameter, estimated from a combination of thermal and optical measurements. ... This article is about the year 2000. ... Robert S. McMillan is an astronomer at the University of Arizona, and heads the Spacewatch project, which studies minor planets. ... (84522) 2002TC302 is a large Scattered Disk Object (SDO), orbiting the sun at a distance of 39. ... For album titles with the same name, see 2002 (album). ... Near Earth Asteroid Tracking (NEAT) is a program run by NASA and Jet Propulsion Laboratory to discover near-Earth objects. ... In astronomy, absolute magnitude is the apparent magnitude, m, an object would have if it were at a standard luminosity distance away from us. ... Albedo is the measure of reflectivity of a surface or body. ...


Sources: [7] [8] [9] [10]


External links

See also

This is a partial list of numbered trans-Neptunian objects (TNOs), in order of discovery date. ... Triton (trye-tÉ™n, IPA , Greek Τρίτων), or Neptune I, is the planet Neptunes largest moon. ... Nemesis is a hypothetical red dwarf star or brown dwarf, orbiting the Sun at a distance of about 50,000 to 100,000 AU, somewhat beyond the Oort cloud. ...

References

  1. ^ a b David L. Rabinowitz, K. M. Barkume, Michael Brown, H. G. Roe, M. Schwartz, S. W. Tourtellotte, C. A. Trujillo (2005), Photometric Observations Constraining the Size, Shape, and Albedo of 2003 El61, a Rapidly Rotating, Pluto-Sized Object in the Kuiper Belt, Astrophysical Journal, submitted Preprint on arXiv
  2. ^ David C. Jewitt, Audrey C. Delsanti The Solar System Beyond The Planets,to appear in the book Solar System Update, Springer-Praxis Ed., Horwood, Blondel and Mason, 2006. Preprint version (pdf)
  3. ^ N. Peixinho, A. Doressoundiram, A. Delsanti, H. Boehnhardt, M. A. Barucci, and I. Belskaya Reopening the TNOs Color Controversy: Centaurs Bimodality and TNOs Unimodality Astronomy and Astrophysics, 410, L29-L32 (2003). Preprint on arXiv(pdf)
  4. ^ O. R. Hainaut & A. C. Delsanti (2002) Color of Minor Bodies in the Outer Solar System Astronomy & Astrophysics, 389, 641 datasource
  5. ^ A. Doressoundiram, N. Peixinho, C. de Bergh, S. Fornasier, Ph. Thébault, M. A. Barucci and C. Veillet The color distribution in the Edgeworth-Kuiper Belt The Astronomical Journal, 124, pp. 2279-2296. Preprint on arXiv
  6. ^ A. Barucci Trans Neptunian Objects’ surface properties, IAU Symposium #229, Asteroids, Comets, Meteors, Aug 2005, Rio de Janeiro
  7. ^ Grundy et al. Diverse Albedos of Small Trans-Neptunian Objects Icarus Notes. Preprint on arXiv (pdf)
  8. ^ Dale P. Cruikshank et al. Albedos, Diameters (and a Density) of Kuiper Belt and Centaur Objects from a session of the 37th meeting of the Division for Planetary Sciences of the American Astronomical Society and the Royal Astronomical Society (September 2005, Cambridge, UK) Abstract
  9. ^ The original press release announcing the measuring of the albedo of 2003 UB313 by Bertoldi et al.
  10. ^ MPC Circular 2006-A28 for 2003 MW12 data
Large trans-Neptunian objectsedit
Kuiper belt: Pluto (Charon) | Orcus | Ixion | 2002 UX25 | Varuna | 2002 TX300 | 2003 EL61 | Quaoar | 2005 FY9 | 2002 AW197
Scattered disc: 2002 TC302 | 2003 UB313 | 2004 XR190 | Sedna
 See also Triton, astronomical objects and the solar system's list of objects, sorted by radius or mass
For pronunciation, see: Centaur and TNO pronunciation.
† Current MPC classification. Some consider Sedna an Oort cloud object.
The minor planetsedit
Vulcanoids | Near-Earth asteroids | Main belt | Jupiter Trojans | Centaurs | Damocloids | Comets | Trans-Neptunians (Kuiper belt · Scattered disc · Oort cloud)
For other objects and regions, see: asteroid groups and families, binary asteroids, asteroid moons and the Solar system
For a complete listing, see: List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.
edit The Solar System
Image:Pianeti.jpg
Planets: Mercury - Venus - Earth (Moon) - Mars - Jupiter - Saturn - Uranus - Neptune - Pluto
Other: Sun - Asteroid belt - Main-belt comets - Kuiper belt - Scattered disc - Oort cloud
See also astronomical objects and the solar system's list of objects, sorted by radius or mass.


David Lincoln Rabinowitz (born 1960) is a researcher at Yale University studying the Kuiper belt and the outer solar system. ... What may be Americas most common name crossing all races. ... Chadwick A. Trujillo (born November 22, 1973) is a postdoctoral scholar at Caltech researching the Edgeworth-Kuiper belt and the outer solar system. ... David C. Jewitt is a Professor of astronomy at the University of Hawaii Institute for Astronomy. ... Audrey C. Delsanti (27 August 1976– ) is a French astronomer who co-discovered (40314) 1999 KR16 in 1999 whilst at La Silla Observatory in Chile. ... IAU is a three-letter acronym that denotes: International Astronomical Union International American University International Association of Universities International Association of Ultra Runners for ultramarathoners. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ... Media:Example. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... (28978) Ixion (ik·sye·un) is a Kuiper belt object discovered on May 22, 2001 with a diameter of < 822 km and a semimajor axis of about 39. ... The correct title of this article is (55637) 2002 UX25. ... 20000 Varuna (VAR oo na) is a Kuiper Belt object about 1060 km in diameter, estimated from a combination of thermal and optical measurements. ... The correct title of this article is (55636) 2002 TX300. ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... Artists impression by G. Bacon of STScI / NASA 50000 Quaoar (pronounced kwah·war, kwah·wor, or kwow·ur, Tongva ) [1] is a Trans-Neptunian object orbiting the Sun in the Edgeworth-Kuiper belt. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ... (55565) 2002 AW197 (also written: (55565) 2002 AW197) is a trans-Neptunian object. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... (84522) 2002TC302 is a large Scattered Disk Object (SDO), orbiting the sun at a distance of 39. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ... The correct title of this article is 2004 XR190. ... 90377 Sedna is a trans-Neptunian object, discovered by Michael Brown (Caltech), Chad Trujillo (Gemini Observatory) and David Rabinowitz (Yale University) on November 14, 2003. ... Triton (trye-tÉ™n, IPA , Greek Τρίτων), or Neptune I, is the planet Neptunes largest moon. ... See also Lists of astronomical objects Category: ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... Below is a list of solar system objects with diameter >500km: The Sun, a spectral class G2 star Mercury Venus Earth Moon Mars Jupiter Io Europa Ganymede Callisto complete list of Jupiters natural satellites Saturn Tethys Dione Rhea Titan Iapetus complete list of Saturns natural satellites Uranus Ariel... This is a list of solar system objects by radius, in decreasing order. ... This is a list of Solar system objects by mass, in decreasing order. ... Pronunciation of Centaurs, Kuiper Belt Objects, and other planetoids of the outer solar system Pronunciation key ... The Minor Planet Center operates at the Smithsonian Astrophysical Observatory (SAO), which is part of the Center for Astrophysics (CfA) along with the Harvard College Observatory (HCO). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... Minor planets, or planetoids are minor bodies of the Solar system orbiting the Sun (or of other planetary systems orbiting other stars) that are larger than meteoroids (the largest of which might be taken to be around 10 meters or so across) but smaller than major planets (Mercury having a... Vulcanoids are hypothetical asteroids that may orbit in a dynamically stable zone between 0. ... Near-Earth asteroids (NEAs) are asteroids whose orbits are close to Earths orbit. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... Image of the Trojan asteroids in front of and behind Jupiter along its orbital path. ... The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... Damocloids are asteroids such as 5335 Damocles and 1996 PW that have long-period highly eccentric orbits typical of periodic comets such as 1P/Halley, but without showing a cometary coma or tail. ... Comet Hale-Bopp For other uses, see Comet (disambiguation). ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... 243 Ida and its moon Dactyl An asteroid moon is an asteroid that orbits another asteroid. ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... This is a list of numbered asteroids, in sequential order. ... This page alphabetically lists the first thousand asteroids to be numbered, which are mostly in the main belt. ... This is a list of named asteroids, with links to the Wikipedia articles on the people, places, characters and concepts that they are named after. ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... Image File history File linksMetadata Pianeti. ... Note: This article contains special characters. ... Adjective Venusian or (rarely) Cytherean (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ... Earth (often referred to as The Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth in order of size. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ... For the Roman god, see Mars (mythology). ... Adjective Jovian Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... Note: This article contains special characters. ... Adjective Uranian Atmospheric characteristics Atmospheric pressure 120 kPa (at the cloud level) Hydrogen 83% Helium 15% Methane 1. ... Adjective Neptunian Atmospheric characteristics Surface pressure ≫100 MPa Hydrogen - H2 80% ±3. ... Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ... The Sun is the star at the center of Earths solar system. ... Image of the main asteroid belt between the orbits of Mars and Jupiter. ... Unlike most comets which originate in the Oort cloud, main-belt comets have near-circular orbits within the asteroid belt and may have been the source of Earths water[1]. Category: ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... The scattered disc (or scattered disk) is a distant region of our solar system, thinly populated by icy planetoids known as scattered disk objects (SDOs), a subset of the broader family of trans-Neptunian objects (TNOs). ... This image is an artists rendering of the Oort cloud and the Kuiper Belt. ... See also Lists of astronomical objects Category: ... The solar system comprises the Earths Sun and the retinue of celestial objects gravitationally bound to it. ... Below is a list of solar system objects with diameter >500km: The Sun, a spectral class G2 star Mercury Venus Earth Moon Mars Jupiter Io Europa Ganymede Callisto complete list of Jupiters natural satellites Saturn Tethys Dione Rhea Titan Iapetus complete list of Saturns natural satellites Uranus Ariel... This is a list of solar system objects by radius, in decreasing order. ... This is a list of Solar system objects by mass, in decreasing order. ...

Trans Neptunian Objects [edit ]
Plutino : Pluto | 1993 RO | 1993 RP | 1993 SB | 1993 SC | 1994 TB | 1995 QZ9 | 1996 SZ4 | 1996 TP66 | 38083 Rhadamanthus | 38628 Huya | 28978 Ixion | 2003 VS2 | 90482 Orcus

Cubewanos: 1992 QB1 | 1994 GV9 | 1994 JQ1 | 1994 VK8 | 1996 TO66 | 19521 Chaos | 53311 Deucalion | 2002 AW197 | 50000 Quaoar | 2002 MS4 | 2002 TX300 | 2002 UX25 | 2003 AZ84 | 2003 EL61 | 2003 QW90 | 2005 FY9 In astronomy, a plutino is a trans-Neptunian object that has a 3:2 orbital resonance with Neptune. ... Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ... 1993 RO is a trans-Neptunian object of the Plutino class. ... (15788) 1993 SB is a trans-Neptunian object of the Plutino class. ... 38083 Rhadamanthus (formerly known as (38083) 1999 HX11) is a trans-Neptunian object. ... 38628 Huya (original provisional designation: 2000 EB173) is a trans-Neptunian object. ... (28978) Ixion (ik·sye·un) is a Kuiper belt object discovered on May 22, 2001 with a diameter of < 822 km and a semimajor axis of about 39. ... 90482 Orcus (originally known by the provisional designation 2004 DW) is a Kuiper Belt object (KBO) that was discovered by Michael Brown of Caltech, Chad Trujillo of the Gemini Observatory, and David Rabinowitz of Yale University. ... A cubewano is a Kuiper belt object, orbiting beyond Pluto and not controlled by resonances with Neptune. ... (15760) 1992 QB1 (also written (15760) 1992 QB1) was the first trans-Neptunian object to be discovered after Pluto and Charon. ... (19308) 1996 TO66 (also written (19308) 1996 TO66) is a trans-Neptunian object. ... 19521 Chaos (1998 WH24) is a cubewano, a Kuiper belt object not in resonance with any planet. ... 53311 Deucalion (original provisional designation: 1999 HU11) is a trans-Neptunian object. ... (55565) 2002 AW197 (also written: (55565) 2002 AW197) is a trans-Neptunian object. ... Artists impression by G. Bacon of STScI / NASA 50000 Quaoar (pronounced kwah·war, kwah·wor, or kwow·ur, Tongva ) [1] is a Trans-Neptunian object orbiting the Sun in the Edgeworth-Kuiper belt. ... The correct title of this article is (55636) 2002 TX300. ... The correct title of this article is (55637) 2002 UX25. ... 2003 EL61 (also written 2003 EL61), nicknamed Santa (non-official designation), is a large and very unusual Kuiper belt object discovered by Mike Brown at Caltech in the United States. ... 2005 FY9 (also written 2005 FY9), codenamed Easterbunny by its discoverers, is a very large Kuiper belt object discovered on March 31, 2005 by the team led by Michael Brown. ...


Twotino: 1996 TR66 | 1998 SM165 | 1997 SZ10 | 1999 RB216 | 2000 JG81 While a Plutino completes 2 orbits around the Sun in the time it takes Neptune to complete 3 orbits, a Twotino makes 1 orbit around the Sun in the time it takes Neptune to complete 2 orbits. ...


Scattered disk object: 1995 TL8 | 1996 GQ21 | 1996 TL66 | 2000 OO67 | 2000 OM67 | 2001 KC77 | 2001 UR163 | 2002 CY224 | 2002 GX32 | 2003 UB313 A scattered disk object (or scattered disc object or SDO) is a trans-Neptunian object of the Kuiper belt with a very eccentric orbit. ... (48639) 1995 TL8 (also written (48639) 1995 TL8) is a trans-Neptunian object of the Scattered disk object subclass, and posesses a very large satellite. ... (15874) 1996 TL66 is a trans-Neptunian object that resides in the Kuyper belt. ... 2000 OO67 is a Trans Neptunian Object notable for its highly eccentric orbit. ... 2003 UB313 is a trans-Neptunian object (TNO) believed to be larger than the planet Pluto. ...


 
 

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