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