HD 13931

HD 13931
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Andromeda
Right ascension	02h 16m 47.38s
Declination	+43° 46′ 22.8″
Apparent magnitude (V)	7.597
Characteristics
Spectral type	G0
Apparent magnitude (B)	8.237
Apparent magnitude (R)	7.2
Apparent magnitude (I)	6.9
Apparent magnitude (J)	6.452
Apparent magnitude (H)	6.234
Apparent magnitude (K)	6.139
B−V color index	0.640
V−R color index	0.4
R−I color index	0.3
Variable type	none
Astrometry
Radial velocity (Rv)	+33.7 km/s
Proper motion (μ)	RA: 99.03 ± 0.66 mas/yr ; Dec.: –183.19 ± 0.49 mas/yr
Parallax (π)	22.61 ± 0.66 mas
Distance	144 ± 4 ly ; (44 ± 1 pc)
Absolute magnitude (MV)	4.306
Details
Mass	1.022 M☉
Radius	1.23 R☉
Luminosity	1.57 L☉
Surface gravity (log g)	4.30 cgs
Temperature	5829 K
Metallicity	+0.03
Rotation	~26 days
Age	8.4 ± 2.0 Gyr
Other designations
	BD+43°459, G 173-50, HIP 10626, LTT 10766, NLTT 7491, PPM 44946, SAO 37918
Database references
SIMBAD	data
Exoplanet Archive	data

HD 13931 is an 8th magnitude G-type star located approximately 144 light years away^[1] in the constellation Andromeda. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is about 8% greater than the Sun. In 2009, a very long-period gas giant planet was found in orbit around the star.

The HD 13931 planetary system^[2]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	≥1.88 ± 0.15 $M$ _J	5.15 ± 0.29	4218 ± 388	0.02 ± 0.05	—	—

References

^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
^ Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal. 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467.

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[van_Leeuwen2007-1] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry

[Howard2010-2] Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal. 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467.

[1]

[2]

See also

References