astro.wikisort.org - Meteorite

HD 102117 b, formally named Leklsullun,[2] is a planet that orbits the star HD 102117. The planet is a small gas giant a fifth the size of Jupiter. It orbits very close to its star, but not in a "torch orbit" like the famous 51 Pegasi b. It is one of the smallest extrasolar planets discovered so far.[3]

HD 102117 b

Discovery
Discovered by	Tinney et al.[1]
Discovery site	Anglo-Australian Observatory, Australia
Discovery date	September 16, 2004
Detection method	Radial Velocity
Orbital characteristics
Apastron	0.1717 AU (25,690,000 km)
Periastron	0.1347 AU (20,150,000 km)
Semi-major axis	0.1532 ± 0.0088 AU (22,920,000 ± 1,320,000 km)
Eccentricity	0.106 ± 0.07
Orbital period (sidereal)	20.8133 ± 0.0064 d
Average orbital speed	80.35
Time of periastron	10942.9 ± 3 2.400.000
Argument of periastron	283 ± 3
Semi-amplitude	11.8 ± 0.77
Star	HD 102117
Physical characteristics
Mass	>0.172 ± 0.018 MJ (>54.7 MEarth)

In 2004, the Anglo-Australian Planet Search announced a planet orbiting the star HD 102117.[1] A short time later the HARPS team also announced the presence of a planet around this same star HD 102117. Both groups detected this planet using the radial velocity method.[4]

References

External links

• "HD 102117". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-04.

На других языках

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- [en] HD 102117 b

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[ru] HD 102117 b

HD 102117 b — экзопланета, небольшой газовый гигант с массой, превышающей[2] 0,17 массы Юпитера, вращающийся вокруг жёлтого карлика HD 102117 в созвездии Центавра. Звезда имеет спектральный класс G6V (несколько более красная и менее горячая, чем наше Солнце) и близкие к солнечным массу и радиус.

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