47 Ursae Majoris d
| Exoplanet | List of exoplanets | |
|---|---|---|
| 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 | ||
| Semi-major 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 |
| 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 | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | 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
References
- 1 2 3 4 5 6 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.
- Jean Schneider (2011). "Notes for Planet 47 Uma d". Extrasolar Planets Encyclopaedia. Retrieved 3 October 2011.
Coordinates: 
10h 59m 28.0s, +40° 25′ 49″
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