The HD 178911 B system contains 1 exoplanet. It is located 133.63 light years away from the solar system.
| Mass | 1.24 solar masses |
| Radius | 1.08 solar radiae |
| Temperature | 5588 kelvin |
| Stellar Metallicity | 0.24 decimal exponent |
| Age | - billion years |
At more than 50 Earth masses, HD 178911 B b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2552.175 Earth masses |
| Density | 7.010 grams per cubic centimeter |
| Radius | 12.600 Earth radiae |
| Semi-major Axis | 0.34 AU |
| Eccentricity | 0.11 |
| Orbital Period | 71.484 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2002-03 |
| Reference | Zucker et al. 2002 |