59 Persei

59 Persei is a suspected astrometric binary^[8] star system in the northern constellation of Perseus. It is visible to the naked eye as a dim, white-hued star with an apparent magnitude of 5.30.^[2] The star is located around 256 light years distant from the Sun, based on parallax,^[1] and is drifting further away with a radial velocity of +13 km/s.^[2]

59 Persei

Observation data Epoch J2000      Equinox J2000
Constellation	Perseus
Right ascension	04h 42m 54.33987s[1]
Declination	+43° 21′ 54.4795″[1]
Apparent magnitude (V)	5.30[2]
Characteristics
Evolutionary stage	main sequence[3]
Spectral type	A1Vn[4]
B−V color index	0.028±0.005[2]
Astrometry
Radial velocity (Rv)	+13.2±3.1[2] km/s
Proper motion (μ)	RA: +30.826[1] mas/yr Dec.: −50.576[1] mas/yr
Parallax (π)	12.7294±0.1774 mas[1]
Distance	256 ± 4 ly (79 ± 1 pc)
Absolute magnitude (MV)	0.99[2]
Details
Mass	2.58[5] M☉
Radius	2.5[6] R☉
Luminosity	41.4+11.7 −9.2[3] L☉
Surface gravity (log g)	4.05±0.14[5] cgs
Temperature	10,734±365[5] K
Rotational velocity (v sin i)	212[3] km/s
Age	198[5] Myr
Other designations
59 Per, BD+43°1043, GC 5719, HD 29722, HIP 21928, HR 1494, SAO 39699[7]
Database references
SIMBAD	data

This is an ordinary A-type main-sequence star with a stellar classification of A1Vn,^[4] a star that is fusing its core hydrogen. The 'n' suffix indicates "nebulous" lines due to rapid spin; it has a projected rotational velocity of 212 km/s.^[3] The star is around 198^[5] million years old with 2.58^[5] times the mass of the Sun and about 2.5^[6] times the Sun's radius. It is radiating 41^[3] times the luminosity of the Sun from its photosphere at an effective temperature of 10,734 K.^[5]