HD 13931

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HD 13931
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 02h 16m 47.38s[1]
Declination +43° 46′ 22.8″[1]
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[1] mas/yr
Dec.: –183.19 ± 0.49[1] mas/yr
Parallax (π) 22.61 ± 0.66[1] 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
Extrasolar Planets
Encyclopaedia
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 system[2]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b ≥1.88 ± 0.15 MJ 5.15 ± 0.29 4218 ± 388 0.02 ± 0.05

See also[edit]

References[edit]

  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
  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. 

Coordinates: Sky map 02h 16m 47.3791s, +43° 46′ 22.784″