47 Ursae Majoris d

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47 Ursae Majoris d
Extrasolar planet List of extrasolar planets
Parent star
Star 47 Ursae Majoris
Constellation Ursa Major
Right ascension (α) 10h 59m 28.0s
Declination (δ) +40° 25′ 49″
Apparent magnitude (mV) 5.03
Distance 45.9 ly
(14.06 pc)
Spectral type G1V
Mass (m) 1.08 M
Radius (r) 1.172 ± 0.111 R
Temperature (T) 5887 ± 3.8 K
Metallicity [Fe/H] 0.04
Age 6.03 Gyr
Orbital elements
Semimajor axis (a) 11.6+2.1
−2.9
[1] AU
(~1730 Gm)
    ~82.4 mas
Periastron (q) 9.7+4.1
−3.2
AU
(~1460 Gm)
Apastron (Q) 13.4+3.7
−4.7
AU
(~2010 Gm)
Eccentricity (e) 0.16+0.09
−0.16
[1]
Orbital period (P) 14002+4018
−5095
[1] d
(~38.33 y)
Orbital speed (υ) 9.0+7.8
−3.7
km/s
Argument of
periastron
(ω) 110+132
−160
[1]°
Time of periastron (T0) 2,451,736+6783
−5051
[1] JD
Physical characteristics
Minimum mass (m sin i) 1.64+0.29
−0.48
[1] MJ
Stellar flux (F) 0.0082 - 0.0157
Temperature (T) 85 K
Discovery information
Discovery date 6 March 2010
Discoverer(s) Gregory and Fischer
Discovery method Doppler spectroscopy
(Bayesian Kepler periodogram)
Discovery site  United States
Discovery status Confirmed
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

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.

Orbits of the 47 Ursae Majoris system planets. 47 UMa d is the outermost planet.


See also[edit]

References[edit]

  1. ^ a b c d e f P. C. Gregory, D. A. Fischer (2010). "A Bayesian periodogram finds evidence for three planets in 47 Ursae Majoris". Monthly Notices of the Royal Astronomical Society 403 (2): 731. arXiv:1003.5549. Bibcode:2010MNRAS.403..731G. doi:10.1111/j.1365-2966.2009.16233.x. 

Coordinates: Sky map 10h 59m 28.0s, +40° 25′ 49″