16 Cygni Bb
16 Cygni Bb rendered in Celestia | |
| Discovery | |
|---|---|
| Discovered by | William D. Cochran, Artie P. Hatzes, R. Paul Butler, Geoff Marcy |
| Discovery site | United States |
| Discovery date | 22 October 1996 |
| Radial velocity | |
| Orbital characteristics | |
| 1.681 ± 0.097 AU (251,500,000 ± 14,500,000 km) | |
| Eccentricity | 0.689 ± 0.011 |
| 798.5 ± 1.0 d | |
| Inclination | 45 or 135 |
| 2,446,549.1 ± 6.6 | |
| 83.4 ± 2.1 | |
| Semi-amplitude | 50.5 ± 1.6 |
| Star | 16 Cygni B |
| Physical characteristics | |
| Mass | 2.38 ± 0.04 MJ |
16 Cygni Bb or HD 186427 b is an extrasolar planet approximately 69 light-years (21 parsecs) away in the constellation of Cygnus. The planet was discovered orbiting the Sun-like star 16 Cygni B, one of two solar-mass (M☉) components of the triple star system 16 Cygni in 1996. It orbits its star once every 799 days and was the first eccentric Jupiter and planet in a double star system to be discovered. The planet is abundant in lithium.