The HD 149026 system contains 1 exoplanet. It is located 247.44 light years away from the solar system.
| Mass | 1.42 solar masses |
| Radius | 1.41 solar radiae |
| Temperature | 6179 kelvin |
| Stellar Metallicity | 0.32 decimal exponent |
| Age | 2.6 billion years |
At more than 50 Earth masses, HD 149026 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 120.775 Earth masses |
| Density | 0.750 grams per cubic centimeter |
| Radius | 8.295 Earth radiae |
| Semi-major Axis | 0.04364 AU |
| Eccentricity | 0 |
| Orbital Period | 2.876 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Subaru Telescope |
| Discovery Telescope | 8.2 m Subaru Telescope |
| Discovery Instrument | HDS Spectrograph |
| Discovery Date | 2005-11 |
| Reference | Sato et al. 2005 |