![]() Polaris as seen by the Hubble Space Telescope. |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Ursa Minor |
Right ascension | 02 |
Declination | +89° 15′ 50.8″ |
Apparent magnitude (V) | 1.97 |
Characteristics | |
Spectral type | F7 Ib-II SB |
U−B color index | 0.38 |
B−V color index | 0.60 |
Variable type | Cepheid variable |
Astrometry | |
Radial velocity (Rv) | -17 km/s |
Proper motion (μ) | RA: 44.48 ± 0.11 mas/yr |
Parallax (π) | 7.54 ± 0.11mas |
Distance | 433 ± 6 ly (133 ± 2 pc) |
Absolute magnitude (MV) | -3.63±0.14 |
Details | |
Mass | 7.54 ± 0.6M☉ |
Radius | 46 ± 3R☉ |
Luminosity | 2200 L☉ |
Temperature | 7200 K |
Metallicity | 112% solar |
Rotation | ~17 km/s |
Age | ? years |
Other designations | |
Polaris, Cynosura, Alruccabah, Phoenice, Navigatoria, Star of Arcady, Yilduz, Mismar, Поля́рная звезда́ (Polyarnaya zvyezda), 1 Ursae Minoris, HR 424, BD +88°8, HD 8890, SAO 308, FK5 907, GC 2243, ADS 1477, CCDM 02319+8915, HIP 11767
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