29 Persei is a single[13] star in the northern constellation of Perseus, located approximately 640 light years away from the Sun based on parallax.[1] It is visible to the naked eye as faint, blue-white hued star with an apparent visual magnitude of 5.16.[2] This object is a member of the Alpha Persei Cluster.[14][15]

29 Persei

Location of 29 Persei (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Perseus
Right ascension	03h 18m 37.74077s[1]
Declination	50° 13′ 19.8341″[1]
Apparent magnitude (V)	5.16[2]
Characteristics
Spectral type	B3V[3]
U−B color index	−0.56[4]
B−V color index	−0.06[4]
Astrometry
Radial velocity (Rv)	−1.50[5] km/s
Proper motion (μ)	RA: +23.574[1] mas/yr Dec.: −24.407[1] mas/yr
Parallax (π)	5.12 ± 0.29 mas[1]
Distance	640 ± 40 ly (200 ± 10 pc)
Absolute magnitude (MV)	−1.31[6]
Details
Mass	6.8[7] M☉
Radius	3.9[8] R☉
Luminosity	960[6] L☉
Surface gravity (log g)	4.025±0.113[9] cgs
Temperature	16,143[6] K
Metallicity [Fe/H]	0.00[10] dex
Rotational velocity (v sin i)	120[11] km/s
Other designations
29 Per, BD+49°899, FK5 2188, GC 3934, HD 20365, HIP 15404, HR 987, SAO 23944[12]
Database references
SIMBAD	data

This is a B-type main-sequence star with a stellar classification of B3 V.[3] During the 1930s it was reported to have a variable radial velocity, but that may instead have been due to instrument error.[16] The star has a high rate of spin, showing a projected rotational velocity of 120 km/s.[11] It has 6.8[7] times the mass of the Sun and about 3.9[8] times the Sun's radius. 29 Persei is radiating 960 times the Sun's luminosity from its photosphere at an effective temperature of 16,143 K.[6]

References