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Yellow-white hued star in the constellation Perseus From Wikipedia, the free encyclopedia
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 | |
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]
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