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Encyclopedia > Neptune Trojan
TNOs and similar bodies

As of March 2007, there are five[1] known Neptune Trojans (named by analogy to the Trojan asteroids) which have the same orbital period as the planet.[2] They lie in the elongated, curved region around the L4 Lagrangian point 60° ahead of Neptune. These are 2001 QR322, 2004 UP10, 2005 TN53, 2005 TO74 and 2006 RJ103. The centaurs are a class of icy planetoids that orbit the Sun between Jupiter and Neptune, named after the mythical race of centaurs. ... A trans-Neptunian object (TNO) is any object in the solar system that orbits the sun at a greater distance on average than Neptune. ... Artists rendering of the Kuiper Belt and hypothetical more distant Oort cloud. ... In astronomy a cubewano (pronounced ) is a Kuiper belt object that orbits beyond Neptune and is not controlled by an orbital resonance with the giant planet. ... In astronomy, a resonant Trans-Neptunian Object is a Trans-Neptunian Object (TNO) in mean motion orbital resonance with Neptune. ... In astronomy, a plutino is a trans-Neptunian object that has a 3:2 orbital resonance with Neptune. ... 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. ... 2007 is a common year starting on Monday of the Gregorian calendar. ... Trojan asteroids of Jupiter (coloured green) in front of and behind Jupiter along its orbital path. ... A contour plot of the effective potential (the Hills Surfaces) of a two-body system (the Sun and Earth here), showing the five Lagrange points. ... 2001 QR322 (also written 2001 QR322) is an asteroid discovered in 2001 that is one of the two currently known Trojan asteroid of Neptune (the other is 2004 UP10). ... 2004 UP10 is a Trojan asteroid of Neptune, and one of only two known. ... 2005 TN53 (also written 2005 TN53) is a possible Trojan asteroid of Neptune which was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005. ... 2005 TO74 (also written 2005 TO74) is a possible Trojan asteroid of Neptune which was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005. ... (also written 2006 RJ103) is a Neptune Trojan discovered by the SDSS Collaboration in 2006. ...

The discovery of 2005 TN53 on a high inclination (>25°) orbit is significant as it suggests a ‘thick’ cloud of Trojans. It is believed that large (radius ≈ 100 km) Neptune Trojans could outnumber Jupiter Trojans by an order of magnitude [3] [4]. 2005 TN53 (also written 2005 TN53) is a possible Trojan asteroid of Neptune which was discovered by Scott S. Sheppard and Chadwick A. Trujillo in 2005. ...

Notes and references

  1. ^ 2005 TN74, listed earlier as a Neptune Trojan, proved to be a scattered disk object.
  2. ^ List Of Neptune Trojans (March 8, 2007) at cfa-www.harvard.edu/iau/.
  3. ^ E. I. Chiang and Y. Lithwick Neptune Trojans as a Testbed for Planet Formation, The Astrophysical Journal, 628, pp. 520–532 Preprint
  4. ^ space.com popular article (Jan 2007)

  Results from FactBites:
SPACE.com -- Neptune May Have Thousands of Escorts (765 words)
The first Neptune Trojan was discovered in 2001 as part of the NASA funded Deep Ecliptic Survey at the Lagrange region 60 degrees and 3.1 billion miles (5 billion kilometers) ahead of Neptune.
A further three Neptune Trojans between 37 and 87 miles (60 and 140 kilometers) in diameter and shaded a pale red color have since been identified by Scott Sheppard of the Carnegie Institution of Washington and Chadwick Trujillo of the Gemini Observatory in Hawaiiusing the 6.5-meter Magellan telescope in Chile.
The most recent Trojan discovered by Sheppard and Trujillo is moving at an unusual inclination of 25 degrees relative to the plane of the solar system (the ecliptic).
Neptune - Wikipedia, the free encyclopedia (2980 words)
Neptune's atmosphere is primarily composed of hydrogen and helium, with traces of methane that account for the planet's blue appearance.
Had Neptune been moving at its regular/average speed when Galileo first observed it in 1612 and 1613, he would have most likely realized that it was a planet and not a fixed star due to Neptune's relatively rapid normal motion along the ecliptic compared to the extremely slow motion of the fixed stars.
Neptune's atmosphere has the highest wind speeds in the solar system, thought to be powered by the flow of internal heat, and its weather is characterized by extremely violent hurricanes, with winds reaching up to 2000 km/h.
  More results at FactBites »



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