The 11 UMi system contains 1 exoplanet. It is located 408.74 light years away from the solar system.
| Mass | 2.78 solar masses |
| Radius | 29.79 solar radiae |
| Temperature | 4213 kelvin |
| Stellar Metallicity | -0.02 decimal exponent |
| Age | 1.56 billion years |
At more than 50 Earth masses, 11 UMi b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 4684.814 Earth masses |
| Density | 13.800 grams per cubic centimeter |
| Radius | 12.300 Earth radiae |
| Semi-major Axis | 1.53 AU |
| Eccentricity | 0.08 |
| Orbital Period | 516.220 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Thueringer Landessternwarte Tautenburg |
| Discovery Telescope | 2.0 m Alfred Jensch Telescope |
| Discovery Instrument | Coude Echelle Spectrograph |
| Discovery Date | 2009-10 |
| Reference | Dollinger et al. 2009 |