51 Arietis

51 Arietis is a star in the northern constellation of Aries. 51 Arietis is the Flamsteed designation. It is a dim, yellow-hued star – a challenge to view with the naked eye, having an apparent visual magnitude of 6.6.^[2] Based upon parallax measurements, the star is located at an estimated distance of 67.3 light-years (20.6 parsecs) from the Sun.^[8] It is receding from the Earth with a heliocentric radial velocity of +9.5 km/s,^[5] and is a member of the IC 2391 moving group.^[3]

51 Arietis

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Aries
Right ascension	03h 02m 26.02628s[1]
Declination	+26° 36′ 33.2602″[1]
Apparent magnitude (V)	6.623 ± 0.005[2]
Characteristics
Spectral type	G8 V[3]
B−V color index	0.715[4]
Astrometry
Radial velocity (Rv)	+9.5±0.1[5] km/s
Proper motion (μ)	RA: +233.122[1] mas/yr Dec.: –168.438[1] mas/yr
Parallax (π)	47.1551±0.0603 mas[1]
Distance	69.17 ± 0.09 ly (21.21 ± 0.03 pc)
Absolute bolometric magnitude (Mbol)	4.85±0.07[2]
Details
Mass	1.04[2] M☉
Radius	0.99[2] R☉
Luminosity	0.92[6] L☉
Surface gravity (log g)	4.46[6] cgs
Temperature	5,666[6] K
Metallicity [Fe/H]	0.15[6] dex
Rotational velocity (v sin i)	4.08[4] km/s
Age	1.40[5] Gyr
Other designations
51 Ari, BD+26°503, GJ 120.2, HD 18803, HIP 14150, SAO 75696[7]
Database references
SIMBAD	data
ARICNS	data

This is an ordinary G-type main sequence star with a stellar classification of G8 V.^[3] Similar to the Sun, it has 1.04 times the mass and 0.99 times the Sun's radius.^[2] It is 1.4^[5] billion years old with a leisurely rotation rate, showing a projected rotational velocity of 4 km/s.^[4] The atmospheric metallicity is higher than solar.^[6] The star radiates 92%^[6] of the Sun's luminosity from its photosphere at an effective temperature of 5,666 K.^[6] This heat gives it the golden-hued glow of a G-type star.^[9]