Back 83 الأسد Bb Arabic 83 Leonis Bb German 83 Leonis Bb Spanish 83 Leonis Bb Finnish 83 Leonis Bb ID 83 Leonis Bb Italian 사자자리 83 Bb Korean 83 Leonis b (planeta) Polish 83 Leonis Bb Portuguese 83 Льва B b Russian
 Hypothetical view of 83 Leonis Bb rendered by Celestia | |
| Discovery | |
|---|---|
| Discovered by | Marcy, Butler, Vogt et al. |
| Discovery site | United States |
| Discovery date | 25 January 2005 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| 0.12186 ± 0.00002 AU (18,230,000 ± 3,000 km)[1] | |
| Eccentricity | 0.13 ± 0.07[1] |
| 17.054 ± 0.003[1] d | |
| 2,450,449 ± 2[1] | |
| 196 ± 32[1] | |
| Semi-amplitude | 7.9 ± 0.6[1] |
| Star | 83 Leonis B |
83 Leonis Bb, also catalogued as HD 99492 b or abbreviated 83 Leo Bb, is an extrasolar planet with a minimum mass of 1.5 Neptune mass. It is located approximately 59 light-years away in the constellation of Leo (the Lion). The planet was discovered in January 2005 by the California and Carnegie Planet Search team, who use the Doppler spectroscopy method to detect planets.[2] It orbits in a close orbit around the star, completing one orbit in about 17 days.[1] The HARPS-N spectrograph discovered a second Neptune-like exoplanet in 2022 orbiting at 95 days.