 An artist's impression of 47 UMa d | |
| Discovery | |
|---|---|
| Discovered by | Gregory and Fischer |
| Discovery site |  United States |
| Discovery date | 6 March 2010 |
| Detection method | Doppler spectroscopy (Bayesian Kepler periodogram) |
| Orbital characteristics | |
| Semi-major axis | 11.6 −2.9 AU |
| Eccentricity | 0.16 −0.16 |
| Orbital period (sidereal) | 14,002 −5095 d ~38.33 y |
| Time of periastron | 2,451,736 −5051 |
| Argument of periastron | 110 −160 |
| Star | 47 Ursae Majoris |
47 Ursae Majoris d (sometimes abbreviated 47 Uma d) is an extrasolar planet approximately 46 light-years away in the constellation of Ursa Major. The planet was discovered located in a long-period orbit (38 years) around the star 47 Ursae Majoris. As of 2011, it is the outermost of three known planets in its planetary system. It has a mass of at least 1.64 times that of Jupiter. It is the longest-period planet detected by Doppler spectroscopy. The evidence of this planet was found by Bayesian Kepler periodogram in March 2010.
References
- ^ Gregory, Philip C.; Fischer, Debra A. (2010). "A Bayesian periodogram finds evidence for three planets in 47 Ursae Majoris". Monthly Notices of the Royal Astronomical Society. 403 (2): 731–747. arXiv:1003.5549. Bibcode:2010MNRAS.403..731G. doi:10.1111/j.1365-2966.2009.16233.x. S2CID 16722873.
- Jean Schneider (2011). "Notes for Planet 47 Uma d". Extrasolar Planets Encyclopaedia. Retrieved 3 October 2011.
| 47 Ursae Majoris system | |
|---|---|
| Stars | |
| Planets | |
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