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.[1]

47 Ursae Majoris d
An artist's impression of 47 UMa d
Discovery
Discovered byGregory and Fischer
Discovery site United States
Discovery date6 March 2010
Doppler spectroscopy
(Bayesian Kepler periodogram)
Orbital characteristics
11.6+2.1
−2.9
[1] AU
Eccentricity0.16+0.09
−0.16
[1]
14,002+4018
−5095
[1] d
~38.33 y
2,451,736+6783
−5051
[1]
110+132
−160
[1]
Star47 Ursae Majoris
Orbits of the 47 Ursae Majoris system planets. 47 UMa d is the outermost planet.

References

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  1. ^ a b c d e f 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.