The HD 189733 system contains 1 exoplanet. It is located 64.46 light years away from the solar system.
| Mass | 0.79 solar masses |
| Radius | 0.75 solar radiae |
| Temperature | 5052 kelvin |
| Stellar Metallicity | -0.02 decimal exponent |
| Age | 1.4 billion years |
At more than 50 Earth masses, HD 189733 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 359.148 Earth masses |
| Density | 0.943 grams per cubic centimeter |
| Radius | 12.666 Earth radiae |
| Semi-major Axis | 0.03126 AU |
| Eccentricity | 0 |
| Orbital Period | 2.219 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Haute-Provence Observatory |
| Discovery Telescope | 1.93 m Telescope |
| Discovery Instrument | ELODIE Spectrograph |
| Discovery Date | 2005-12 |
| Reference | Bouchy et al. 2005 |