HD 102117 b

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 byTinney et al.[1]
Discovery siteAnglo-Australian Observatory, Australia
Discovery dateSeptember 16, 2004
Radial Velocity
Orbital characteristics
Apastron0.1717 AU (25,690,000 km)
Periastron0.1347 AU (20,150,000 km)
0.1532 ± 0.0088 AU (22,920,000 ± 1,320,000 km)
Eccentricity0.106 ± 0.07
20.8133 ± 0.0064 d
80.35
10942.9 ± 3 2.400.000
283 ± 3
Semi-amplitude11.8 ± 0.77
StarHD 102117
Physical characteristics
Mass>0.172 ± 0.018 MJ
(>54.7 M⊕)

    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
    1. Tinney, C. G.; et al. (2005). "Three Low-Mass Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 623 (2): 1171–1179. Bibcode:2005ApJ...623.1171T. CiteSeerX 10.1.1.491.2941. doi:10.1086/428661.
    2. "Approved names". NameExoworlds. Retrieved 2020-01-02.
    3. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
    4. Lovis, C.; et al. (2005). "The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117". Astronomy and Astrophysics. 437 (3): 1121–1126. arXiv:astro-ph/0503660. Bibcode:2005A&A...437.1121L. doi:10.1051/0004-6361:20052864.


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