Nu Persei
Yellow-white hued star in the constellation Perseus
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ν Persei, Latinized as Nu Persei, is a single[13] star and a suspected variable in the northern constellation of Perseus. It has a yellow-white hue and is visible to the naked eye with an apparent visual magnitude of 3.80.[2] This object is located approximately 560 light-years from the Sun based on parallax[1] but is drifting closer with a radial velocity of −12 km/s.[5]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Perseus |
| Right ascension | 03h 45m 11.63204s[1] |
| Declination | +42° 34′ 42.7829″[1] |
| Apparent magnitude (V) | 3.80[2] |
| Characteristics | |
| Spectral type | F5II[3] |
| U−B color index | +0.28[2] |
| B−V color index | +0.42[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −12.10[5] km/s |
| Proper motion (μ) | RA: −14.45[1] mas/yr Dec.: +2.53[1] mas/yr |
| Parallax (π) | 5.86±0.22 mas[1] |
| Distance | 560 ± 20 ly (171 ± 6 pc) |
| Absolute magnitude (MV) | −2.39[6] |
| Details | |
| Mass | 5.01[7] M☉ |
| Radius | 20.62+1.72 −1.76[8] R☉ |
| Luminosity | 603.6±41.2[8] L☉ |
| Surface gravity (log g) | 3.04[9] cgs |
| Temperature | 6,300+287 −158[8] K |
| Metallicity [Fe/H] | +0.41[9] dex |
| Rotational velocity (v sin i) | 48.9[10] km/s |
| Age | 109[11] Myr |
| Other designations | |
| ν Per, 41 Persei, NSV 1261, BD+42°815, FK5 134, GC 4474, HD 23230, HIP 17529, HR 1135, SAO 39078, CCDM J03452+4235A, WDS J03452+4235A[12] | |
| Database references | |
| SIMBAD | data |
This object is a highly luminous bright giant star with a stellar classification of F5II.[3] It has five[7] times the mass of the Sun but has expanded to around 21[8] times the Sun's radius. The star has a relatively high rotation rate, spinning with a projected rotational velocity of 48.9 km/s.[10] It is radiating 604[8] times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 6,300 K.[8]
Several visual companions beside the primary have been recorded. B, with magnitude 12.1 and separation 31.6", has its own companion, E, with magnitude 14.3 and separation 7.7". Additionally, C has magnitude 13.2 and separation 55.7", and D has magnitude 13.8 and separation 22.8".[14]