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(Redirected from GJ 317)
'Gliese 317' is a red dwarf star of magnitude 12 located in constellation Pyxis. The distance from the solar system is almost 30 light years away with the absolute magnitude of 12.2, corresponding to visual luminosity of 0.1% Sun.
There is one confirmed and one unconfirmed planet, both discovered in 2007.
'Gliese 317 b' is a jovian planet that orbits about 95% the distance between Earth to the Sun. Despite of this, it takes about 1.9 years, corresponding to slow orbital velocity of 14.82 km/s.
There is a possible second planet in the system, if it exist, the orbital parameters would change for the first planet. It would have an orbital period of 673.4 days and eccentricity of 0.25.
'Gliese 317 c' is a possible jovian planet at least 83% the mass of Jupiter. The semi-major axis is unknown, relatively typical for unconfirmed planets. The eccentricity of the orbit is 42% and have orbital period of 7.4 years.
★ A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass, John A. Johnson, R. Paul Butler, Geoffrey W. Marcy, Debra A. Fischer, Steven S. Vogt, Jason T. Wright, Kathryn M. G. Peek, , , ARXIV, 2007
★ SIMBAD Query result
★ 'The Extrasolar Planets Encyclopaedia:' GJ 317 + b + c
'Gliese 317' is a red dwarf star of magnitude 12 located in constellation Pyxis. The distance from the solar system is almost 30 light years away with the absolute magnitude of 12.2, corresponding to visual luminosity of 0.1% Sun.
| Contents |
| Planets |
| Gliese 317 b |
| Gliese 317 c |
| Reference |
| External links |
Planets
There is one confirmed and one unconfirmed planet, both discovered in 2007.
Gliese 317 b
'Gliese 317 b' is a jovian planet that orbits about 95% the distance between Earth to the Sun. Despite of this, it takes about 1.9 years, corresponding to slow orbital velocity of 14.82 km/s.
There is a possible second planet in the system, if it exist, the orbital parameters would change for the first planet. It would have an orbital period of 673.4 days and eccentricity of 0.25.
Gliese 317 c
'Gliese 317 c' is a possible jovian planet at least 83% the mass of Jupiter. The semi-major axis is unknown, relatively typical for unconfirmed planets. The eccentricity of the orbit is 42% and have orbital period of 7.4 years.
Reference
★ A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass, John A. Johnson, R. Paul Butler, Geoffrey W. Marcy, Debra A. Fischer, Steven S. Vogt, Jason T. Wright, Kathryn M. G. Peek, , , ARXIV, 2007
External links
★ SIMBAD Query result
★ 'The Extrasolar Planets Encyclopaedia:' GJ 317 + b + c
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