| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.044 AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 3.4442 ± 0.0002 d |
| Argument of periastron |
(ω) | 0° |
| Time of periastron | (T0) | 2,453,323.206 ± 0.002 JD |
| Semi-amplitude | (K) | 67.4±0.4 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.48 MJ |
| Discovery information | ||
| Discovery date | 2005 | |
| Discoverer(s) | Moutou, Mayor, Bouchy et al. |
|
| Detection method | Radial velocity | |
| Discovery site | Geneva | |
| Discovery status | Published | |
HD 2638 b is a planet of the star HD 2638. It is a typical "hot Jupiter", a planet that orbits its parent star in a very tight "torch orbit". Distance to the star is less than 1/20th Earth's distance from the Sun. One orbital revolution lasts only about three and half days.