The HD 2638 system contains 1 exoplanet. It is located 179.26 light years away from the solar system.
| Mass | 0.77 solar masses |
| Radius | 0.94 solar radiae |
| Temperature | 5186 kelvin |
| Stellar Metallicity | 0.13 decimal exponent |
| Age | 3 billion years |
At more than 50 Earth masses, HD 2638 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 133.489 Earth masses |
| Density | 0.251 grams per cubic centimeter |
| Radius | 14.300 Earth radiae |
| Semi-major Axis | 0.04 AU |
| Eccentricity | 0 |
| Orbital Period | 3.444 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 3.6 m ESO Telescope |
| Discovery Instrument | HARPS Spectrograph |
| Discovery Date | 2005-08 |
| Reference | Moutou et al. 2005 |