Astronomy:HD 13931 b
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Short description: Extrasolar planet in the Andromeda constellation
| Discovery[1] | |
|---|---|
| Discovered by | Howard et al. |
| Discovery site | Keck Observatory |
| Discovery date | November 13, 2009 |
| Radial velocity | |
| Orbital characteristics[1][2] | |
| 5.33 ± 0.09 AU (797,000,000 ± 13,000,000 km) | |
| Eccentricity | <0.04 |
| Orbital period | 4442+49 −46 d (12.16 y) |
| Average Orbital speed | 13.3 ± 2.2 |
| Inclination | 39°+13° −8° or 141°+9° −18° |
| Longitude of ascending node | 343°+17° −19° or 110°+19° −24° |
| astron|astron|helion}} | 24494 ± 904 |
| 74 - 227 | |
| Semi-amplitude | 22.8 ± 3.0 |
| Star | HD 13931 |
| Physical characteristics[2] | |
| Mass | 3.1+0.8 −0.7 Jupiter mass |
HD 13931 b (also known as HIP 10626 b) is an extrasolar planet which orbits the G-type star HD 13931, located approximately 155 light years away in the constellation Andromeda. This planet takes 11.55 years to orbit the star at the average distance of 5.15 AU or 770 Gm. The planet's eccentricity (0.02) is about the same as Earth.[1] The orbital distance for this planet ranges from 5.05 to 5.25 AU. This planet was discovered by using radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009.
In 2023, the inclination and true mass of HD 13931 b were measured via astrometry.[2]
See also
Other planets that were discovered or confirmed on November 13, 2009:
References
- ↑ 1.0 1.1 1.2 Howard, Andrew W. et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal 721 (2): 1467–1481. doi:10.1088/0004-637X/721/2/1467. Bibcode: 2010ApJ...721.1467H.
- ↑ 2.0 2.1 2.2 Philipot, F. et al. (January 2023). "Updated characterization of long-period single companion by combining radial velocity, relative astrometry, and absolute astrometry". Astronomy & Astrophysics 670: A65. doi:10.1051/0004-6361/202245396. Bibcode: 2023A&A...670A..65P.
- Jean Schneider (2011). "Notes for Planet HD 13931 b". Extrasolar Planets Encyclopaedia. https://exoplanet.eu/catalog/hd_13931_b--616/.
Coordinates: 
02h 16m 47.3791s, +43° 46′ 22.784″
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