![]() ![]() The red dot shows the location of Mirfak in Perseus. |
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Observation data Epoch J2000 Equinox J2000 |
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Constellation | Perseus |
Right ascension | 03 |
Declination | +49° 51′ 40.2455″ |
Apparent magnitude (V) | 1.806 |
Characteristics | |
Spectral type | F5 Ib |
U−B color index | +0.38 |
B−V color index | +0.483 |
Astrometry | |
Radial velocity (Rv) | –2.04 km/s |
Proper motion (μ) | RA: +23.75 mas/yr |
Parallax (π) | 6.44 ± 0.17mas |
Distance | 510 ± 10 ly (155 ± 4 pc) |
Absolute magnitude (MV) | –5.1 |
Details | |
Mass | 7.3 ± 0.3M☉ |
Radius | 60 ± 7R☉ |
Surface gravity (log g) | 1.90 ± 0.04 |
Temperature | 6,350 ± 100K |
Metallicity [Fe/H] | –0.02dex |
Rotational velocity (v sin i) | 20 km/s |
Age | 41Myr |
Other designations | |
Mirfak, Mirphak, Marfak, Algeneb, Algenib, 33 Per, BD+49 917, FK5 120, HD 20902, HIP 15863, HR 1017, SAO 38787.
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