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Encyclopedia > Phi2 Pavonis
Phi2 Pavonis
Observation data
Epoch J2000.0
Constellation Pavo
Right ascension 20h 40m 02.64s
Declination -60° 32' 40"
Apparent magnitude (V) +5.12
Distance 82 ly
(25 pc)
Spectral type F8V
Other designations
HD 196378, HR 7875

Phi2 Pavonis (HD 196378) is a yellow dwarf star about 82 light-years away in the constellation Pavo. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... The J2000. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Pavo, being Latin for Peacock, is a southern constellation. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... // Headline text HEY!! HOW ARE YOU ALL?? Its nice of you to come read this page. ... The distance between two points is the length of a straight line segment between them. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... In astronomy, many stars are referred to simply by catalogue numbers. ... Large solar flare recorded by SOHO EIT304 instrument in the ultraviolet. ... The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... A light year (or light-year, or lightyear), symbol ly, is the distance light travels in one year: about 9. ... Orion is a remarkable constellation, visible from most places on the globe at one time or another during the year. ... Pavo, being Latin for Peacock, is a southern constellation. ...


As of 1998, a susspected extrasolar planet was announced.
1998 is a common year starting on Thursday of the Gregorian calendar, and was designated the International Year of the Ocean. ... Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ...

Contents


Planet

Phi2 Pavonis b

Phi2 Pavonis b
Orbital elements
Semi-major axis (a) 0.25 AU
Eccentricity (e) 0.429
Orbital period (P) 42.5 d
Inclination (i)  ?°
Argument of
periastron
(ω)  ?°
Time of periastron (τ)  ? JD
Physical characteristics
Mass 0.69 MJ
Radius 0.965 RJ
Density  ? kg/
Temperature 733 K
Discovery
Discovery date 1989 (TBC)
Detection method(s) Doppler Spectroscopy
Discoverer(s) Kürster et al.

Phi2 Pavonis b (HD 196378 b) is an extrasolar planet orbiting the star Phi2 Pavonis. This planet is not confirmed, but it might be a planet with a temperature similar to Mercury.
The semi-major axis of an ellipse In geometry, the term semi-major axis (also semimajor axis) is used to describe the dimensions of ellipses and hyperbolae. ... The astronomical unit (AU or au or a. ... In astrodynamics, under standard assumptions any orbit must be of conic section shape. ... The orbital period is the time it takes a planet (or another object) to make one full orbit. ... A day (symbol: d) is a unit of time equal to 24 hours. ... Inclination in general is the angle between a reference plane and another plane or axis of direction. ... In an orbit, the argument of periapsis (ω) is the angle between the ascending node (the point where the orbiting body passes from the southern to the northern hemisphere) and the periapsis (the point of closest approach to the central body), measured in the bodys orbital plane and in its... A diagram of Keplerian orbital elements. ... A diagram of Keplerian orbital elements. ... The Julian day or Julian day number (JDN) is the number of days that have elapsed since 12 noon Greenwich Mean Time (UT or TT) on Monday, January 1, 4713 BC in the proleptic Julian calendar . ... Mass is a property of a physical object that quantifies the amount of matter and energy it contains. ... Adjective Jovian Atmospheric characteristics Atmospheric pressure 70 kPa Hydrogen ~86% Helium ~14% Methane 0. ... In classical geometry, a radius of a circle or sphere is any line segment from its center to its boundary. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... The international prototype, made of platinum-iridium, which is kept at the BIPM under conditions specified by the 1st CGPM in 1889. ... The cubic meter (symbol m³) is the SI derived unit of volume. ... Temperature is also the name of a song by Sean Paul. ... The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. ... 1989 (MCMLXXXIX) was a common year starting on Sunday of the Gregorian calendar. ... Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ... Infrared image of the star GQ Lupi (A) orbited by a planet (b) at a distance of approximately 20 times the distance between Jupiter and our Sun. ... Atmospheric characteristics Atmospheric pressure trace Potassium 31. ...


See also

Iota Horologii (also called HR 810 / ι Hor) is a Sun-like star about 50 ly. ... HR 5568 or Gliese 570 is a triple star system 19. ...

External links


  Results from FactBites:
 
F stars within 100 light-years (678 words)
Of those three hundred some F-type stars, astronomers believe that five have evolved out of the main sequence into giant stars, while an additional 82 or so may be subgiants (more on nearby giants and subgiants).
As many as eight F-type stars have been identified as being located in Sol's immediate neighborhood (within 10 parsecs or 32.6 light-years): Procyon A, Pi3 Orionis, Chi Draconis A, Alula Australis Aa, Zeta Tucanae, Gamma Leporis A, Beta Comae Berenices, and Gamma Pavonis.
Due in part to their relatively proximity and abundance, many F-type stars can be seen with the naked eye in Earth's night sky.
  More results at FactBites »

 
 

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