The HD 210277 system contains 1 exoplanet. It is located 69.47 light years away from the solar system.
| Mass | 1.01 solar masses |
| Radius | 1.07 solar radiae |
| Temperature | 5538 kelvin |
| Stellar Metallicity | 0.22 decimal exponent |
| Age | 12 billion years |
At more than 50 Earth masses, HD 210277 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 410.001 Earth masses |
| Density | 0.896 grams per cubic centimeter |
| Radius | 13.600 Earth radiae |
| Semi-major Axis | 1.13 AU |
| Eccentricity | 0.48 |
| Orbital Period | 442.190 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 1999-07 |
| Reference | Marcy et al. 1999 |