![]() ![]() Location of α Arietis (circled) |
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Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
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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.
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Database references | |
SIMBAD | data |