| Discovery | |
|---|---|
| Discovered by | Döllinger et al. |
| Discovery site | TLS |
| Discovery date | August 12, 2009 |
| Detection method | Radial velocity |
| Orbital characteristics | |
| Semi-major axis | 1.54 ± 0.07 AU (230,000,000 ± 10,000,000 km) |
| Eccentricity | 0.08 ± 0.03 |
| Orbital period (sidereal) | 516.22 ± 3.25 d 1.4133 ± 0.0089 y |
| Time of periastron | 2452861.05 ± 2.06 |
| Argument of periastron | 117.63 ± 21.06 |
| Star | 11 Ursae Minoris |
| Proper orbital elements | |
| Proper semi-major axis | 1.54±0.07 AU |
| Proper eccentricity | 0.08±0.03 |
| Physical characteristics | |
| Mass | 11.2±0.2 MJ |
11 Ursae Minoris b is an extrasolar planet which orbits the K-type giant star 11 Ursae Minoris, located approximately 390 light years away in the constellation Ursa Minor. This planet has a minimum mass of 10.5 MJ. Since inclination is not known, the actual mass is unknown. This planet may actually be a brown dwarf if a true mass is over 13 times that of Jupiter. This planet takes 17 months to orbit the star at the average distance of 1.54 AU in a circular orbit. This superjovian planet was detected by radial velocity method on August 12, 2009.
References
- "11 UMi". Open Exoplanet Catalogue. Retrieved January 23, 2022.
- Döllinger, P.; et al. (2009). "Planetary companions around the K giant stars 11 Ursae Minoris and HD 32518". Astronomy and Astrophysics. 505 (3): 1311–1317. arXiv:0908.1753. Bibcode:2009A&A...505.1311D. doi:10.1051/0004-6361/200911702. S2CID 9686080.
- Jean Schneider (2011). "Notes for Planet 11 Umi b". Extrasolar Planets Encyclopaedia. Retrieved 30 September 2011.
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