![]() The position of Aldebaran in the Taurus constellation. |
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Observation data Epoch J2000.0 Equinox J2000.0 |
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Constellation | Taurus |
Right ascension | 04 |
Declination | +16° 30′ 33.49″ |
Apparent magnitude (V) | 0.75-0.95 |
Characteristics | |
Spectral type | K5III |
Apparent magnitude (J) | -2.10 |
U−B color index | 1.90 |
B−V color index | 1.54 |
Variable type | LB |
Astrometry | |
Radial velocity (Rv) | +54.26 ±0.03 km/s |
Proper motion (μ) | RA: 62.78 ±0.89 mas/yr |
Parallax (π) | 50.09 ± 0.95 mas |
Distance | 65 ± 1 ly (20.0 ± 0.4 pc) |
Absolute magnitude (MV) | −0.63 |
Details | |
Mass | 1.7M☉ |
Radius | 44.2 ± 0.9R☉ |
Luminosity | 518 ± 32L☉ |
Surface gravity (log g) | 1.59 |
Temperature | 3,910K |
Metallicity | 70% Sun |
Metallicity [Fe/H] | –0.34dex |
Rotation | 643 days |
Other designations | |
87 Tauri, Alpha Tauri, BD +16°629, GJ 171.1, GJ 9159, HD 29139, HIP 21421, HR 1457, SAO 94027
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Database references | |
SIMBAD | data |
ARICNS | data |