![]() ![]() Location of β Ursae Minoris (circled) |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Ursa Minor |
Right ascension | 14 |
Declination | +74° 09′ 19.8142″ |
Apparent magnitude (V) | 2.08 |
Characteristics | |
Spectral type | K4 III |
U−B color index | +1.78 |
B−V color index | +1.47 |
Astrometry | |
Radial velocity (Rv) | +16.96 km/s |
Proper motion (μ) | RA: -32.61 mas/yr |
Parallax (π) | 24.91 ± 0.12mas |
Distance | 130.9 ± 0.6 ly (40.1 ± 0.2 pc) |
Details | |
Mass | 2.2 ± 0.3M☉ |
Radius | 42.06 ± 0.91R☉ |
Luminosity | 390 ± 25L☉ |
Surface gravity (log g) | 1.83 |
Temperature | 4,030K |
Metallicity [Fe/H] | –0.29dex |
Rotational velocity (v sin i) | 8 km/s |
Other designations | |
Kochab, Kocab, Kochah, 7 Ursae Minoris, Al Kaukab al Shamaliyy, BD +74 595, FK5 550, GCTP 3373.00, HD 131873, HIP 72607, HR 5563, SAO 8102.
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