55 Cancri c
55 Cancri c (abbreviated 55 Cnc c), formally named Brahe (pronounced /ˈbrɑːhiː/ or /ˈbrɑː/), is an extrasolar planet in an eccentric orbit around the Sun-like star 55 Cancri A, making one revolution every 44.34 days. It is the third known planet in order of distance from its star. 55 Cancri c was discovered on June 13, 2002, and has a mass roughly half of Saturn.
The planet 55 Cnc c (min mass ~0.17 MJ) in MPL3D | |
| Discovery | |
|---|---|
| Discovered by | Marcy et al. |
| Discovery site | California, USA |
| Discovery date | June 13, 2002 |
Detection method | Radial velocity |
| Orbital characteristics | |
| Apastron | 0.260 AU (38,900,000 km) |
| Periastron | 0.219 AU (32,800,000 km) |
Semi-major axis | 0.240 ± 0.00005 AU (35,903,500 ± 7,500 km) |
| Eccentricity | 0.086 ± 0.052 |
Orbital period (sidereal) | 44.3446 ± 0.007 d 0.121407 y |
| 2,449,989.3385 ± 3.3 | |
| 77.9 ± 29 | |
| Semi-amplitude | 10.18 ± 0.43 |
| Star | 55 Cancri A |
In July 2014 the International Astronomical Union launched NameExoWorlds, a process for giving proper names to certain exoplanets and their host stars. The process involved public nomination and voting for the new names. In December 2015, the IAU announced the winning name was Brahe for this planet. The winning name was submitted by the Royal Netherlands Association for Meteorology and Astronomy of the Netherlands. It honors the astronomer Tycho Brahe.