Nu Cassiopeiae

Nu Cassiopeiae,^[11] Latinized from ν Cassiopeiae, is a solitary^[12] star in the northern constellation of Cassiopeia. With an apparent visual magnitude of +4.89,^[2] it is a faint star but visible to the naked eye. Based upon an annual parallax shift of 7.92 mas as seen from Earth,^[1] this star is located around 410 light years from the Sun. Cowley et al. (1969) catalogued this star with a stellar classification of B9 III,^[3] indicating it has the spectrum of an evolved B-type giant star. However, Palmer et al. (1968) assigned it a class of B8 V, which would instead suggest it is an ordinary B-type main-sequence star.^[4]

Nu Cassiopeiae

Map of the Bayer-designated stars in Cassiopeia. Nu Cassiopeiae is circled.
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Cassiopeia
Right ascension	00h 43m 28.07045s[1]
Declination	+47° 01′ 28.3694″[1]
Apparent magnitude (V)	+4.89[2]
Characteristics
Spectral type	B9 III[3] or B8 V[4]
U−B color index	−0.43[5]
B−V color index	−0.11[5]
Astrometry
Radial velocity (Rv)	+9.0±4.2[6] km/s
Proper motion (μ)	RA: +30.84±0.22[1] mas/yr Dec.: −10.02±0.18[1] mas/yr
Parallax (π)	7.92 ± 0.32 mas[1]
Distance	410 ± 20 ly (126 ± 5 pc)
Absolute magnitude (MV)	−0.60[7]
Details
Mass	3.90±0.07[8] M☉
Luminosity	348[8] L☉
Surface gravity (log g)	4.026±0.035[9] cgs
Temperature	13,268±150[9] K
Rotational velocity (v sin i)	134±17[9] km/s
Other designations
ν Cas, 25 Cas, BD+50° 147, HD 4636, HIP 3801, HR 223, SAO 21729[10]
Database references
SIMBAD	data