HD 102117 b
| Discovery | |
|---|---|
| Discovered by | Tinney et al. |
| Discovery site | Anglo-Australian Observatory, Australia |
| Discovery date | September 16, 2004 |
| Radial Velocity | |
| Orbital characteristics | |
| Apastron | 0.1717 AU (25,690,000 km) |
| Periastron | 0.1347 AU (20,150,000 km) |
| 0.1532 ± 0.0088 AU (22,920,000 ± 1,320,000 km) | |
| Eccentricity | 0.106 ± 0.07 |
| 20.8133 ± 0.0064 d | |
Average orbital speed | 80.35 |
| 10942.9 ± 3 2.400.000 | |
| 283 ± 3 | |
| Semi-amplitude | 11.8 ± 0.77 |
| Star | HD 102117 |
| Physical characteristics | |
| Mass | >0.172 ± 0.018 MJ (>54.7 M🜨) |
HD 102117 b, formally named Leklsullun, 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 was one of the smallest extrasolar planets discovered as of 2006.
In 2004, the Anglo-Australian Planet Search announced a planet orbiting the star HD 102117. 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.