The 8 UMi system contains 1 exoplanet. It is located 530.17 light years away from the solar system.
| Mass | 1.44 solar masses |
| Radius | 10.3 solar radiae |
| Temperature | 4847 kelvin |
| Stellar Metallicity | -0.03 decimal exponent |
| Age | 1.7 billion years |
At more than 50 Earth masses, 8 UMi b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 416.357 Earth masses |
| Density | 0.910 grams per cubic centimeter |
| Radius | 13.600 Earth radiae |
| Semi-major Axis | 0.49 AU |
| Eccentricity | 0.06 |
| Orbital Period | 93.400 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Bohyunsan Optical Astronomical Observatory |
| Discovery Telescope | 1.8 m Telescope |
| Discovery Instrument | BOES Echelle Spectrograph |
| Discovery Date | 2015-12 |
| Reference | Lee et al. 2015 |