Alpha Arietis

Location of α Arietis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Aries
Right ascension 02
Declination +23° 27′ 44.7032″
Apparent magnitude (V) 2.00
Characteristics
Spectral type K2 III Ca-1
U−B color index +1.13
B−V color index +1.15
V−R color index +0.7
R−I color index +0.62
Variable type Suspected
Astrometry
Radial velocity (Rv) −14.2 ± 0.9 km/s
Proper motion (μ) RA: +188.55 mas/yr
Parallax (π) 49.56 ± 0.25mas
Distance 65.8 ± 0.3 ly
(20.2 ± 0.1 pc)
Absolute magnitude (MV) +0.47 ± 0.04
Details
Mass 1.5 ± 0.2M
Radius 14.9 ± 0.3R
Luminosity (bolometric) 91 ± 6L
Surface gravity (log g) 2.57
Temperature 4,480K
Metallicity [Fe/H] –0.25dex
Rotational velocity (v sin i) 3.44 km/s
Other designations
Hemal, Hamul, Hamal, Ras Hammel, El Nath, Arietis, α Ari, Alpha Arietis, Alpha Ari, 13 Arietis, 13 Ari, BD+22 306, FK5 74, GC 2538, GJ 84.3, GJ 9072, HD 12929, HIP 9884, HR 617, LTT 10711, NLTT 7032, PPM 91373, SAO 75151.
Database references
SIMBAD data

Get more info about Hamal in Wikipedia

This article uses material from the Wikipedia article
Hamal, which is released under the Creative Commons Attribution-Share-Alike License 3.0