HD 10939

For other stars with this Bayer designation, see q Eridani.

HD 10939 is a star^[5][6] with an apparent magnitude of 5.03, making it visible to the naked eye. It glows white with a spectral type of A1V, and has a surface temperature of around 7,500 to 10,000 K.

HD 10939

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Eridanus[1]
Right ascension	01h 46m 06.3s[2]
Declination	−53° 31′ 19″[2]
Apparent magnitude (V)	5.03[3]
Characteristics
Evolutionary stage	main sequence[2]
Spectral type	A1V[4]
U−B color index	0.05[5][6]
B−V color index	0.04[5][6]
Astrometry
Proper motion (μ)	RA: +126.534 mas/yr[2] Dec.: +59.909 mas/yr[2]
Parallax (π)	16.0575±0.0693 mas[2]
Distance	203.1 ± 0.9 ly (62.3 ± 0.3 pc)
Absolute magnitude (MV)	+1.08[1]
Details
Mass	2.3[7] M☉
Radius	2.27[7] R☉
Luminosity	32[7] L☉
Surface gravity (log g)	4.09[7] cgs
Temperature	9,110[7] K
Rotation	0.69 days[8]
Rotational velocity (v sin i)	72.8[8] km/s
Age	346[9] Myr
Other designations
CPD−54°377, SAO 232520, HD 10939, HR 520, q2 Eridani[5]
Database references
SIMBAD	data