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Star in the constellation Perseus From Wikipedia, the free encyclopedia
32 Persei is a single[12] star located 149[1] light years away from the Sun in the northern constellation of Perseus.[11] It has the Bayer designation of l Persei, while 32 Persei is the Flamsteed designation. This object is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.96.[2] It is moving closer to the Earth with a heliocentric radial velocity of −9 km/s,[5] and is a member of the Sirius supercluster: a stream of stars that share a common motion through space.[13]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Perseus |
Right ascension | 03h 21m 26.55723s[1] |
Declination | 43° 19′ 46.7414″[1] |
Apparent magnitude (V) | 4.96[2] |
Characteristics | |
Spectral type | A3V[3] |
U−B color index | +0.07[4] |
B−V color index | +0.04[4] |
Astrometry | |
Radial velocity (Rv) | −9.00[5] km/s |
Proper motion (μ) | RA: −59.947[1] mas/yr Dec.: −0.839[1] mas/yr |
Parallax (π) | 21.8865 ± 0.2690 mas[1] |
Distance | 149 ± 2 ly (45.7 ± 0.6 pc) |
Absolute magnitude (MV) | 1.64[2] |
Details | |
Mass | 2.05[6] M☉ |
Radius | 1.8[7] R☉ |
Luminosity | 21[6] L☉ |
Surface gravity (log g) | 4.19[8] cgs |
Temperature | 8,872[6] K |
Metallicity [Fe/H] | −0.01[9] dex |
Rotational velocity (v sin i) | 144[6] km/s |
Age | 125+75 −25[10] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is an ordinary A-type main-sequence star with a stellar classification of A3V.[3] It is around 125[10] million years old with a high rate of spin, showing a projected rotational velocity of 144 km/s.[6] The star has double[6] the mass of the Sun and 1.8[7] times the Sun's radius. It is radiating 21[6] times the luminosity of the Sun from its photosphere at an effective temperature of 8,872 K.[6]
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