![]() ![]() Alioth in Ursa Major (circled). |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Ursa Major |
Right ascension | 12 |
Declination | +55° 57′ 35.3627″ |
Apparent magnitude (V) | 1.77 |
Characteristics | |
Spectral type | A0pCr |
U−B color index | +0.02 |
B−V color index | -0.02 |
Variable type | α2-CVn |
Astrometry | |
Radial velocity (Rv) | -9.3 km/s |
Proper motion (μ) | RA: +111.91 mas/yr |
Parallax (π) | 39.51 ± 0.20mas |
Distance | 82.6 ± 0.4 ly (25.3 ± 0.1 pc) |
Absolute magnitude (MV) | –0.2 |
Details | |
Mass | 2.91M☉ |
Radius | 3.7 R☉ |
Luminosity | 108 L☉ |
Surface gravity (log g) | 3.5 |
Temperature | 10,800K |
Metallicity [Fe/H] | +0.00dex |
Rotational velocity (v sin i) | 33 km/s |
Other designations | |
Alioth, Allioth, Aliath, 77 Ursae Majoris, BD +56°1627, FK5 483, HD 112185, HIP 62956, HR 4905, GCTP 2964.00, SAO 28553.
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