Binary star system in the constellation Perseus
34 Persei Location of 34 Persei (circled)
Observation dataEpoch J2000 Equinox J2000 Constellation Perseus Right ascension 03h 29m 22.05019s [ 1] Declination +49° 30′ 32.2114″[ 1] Apparent magnitude (V)4.67[ 2] (4.76 + 7.18) [ 3] Characteristics Evolutionary stage Main sequence Spectral type B3V[ 4] U−Bcolor index −0.57[ 5] B−Vcolor index −0.09[ 5] Astrometry Radial velocity (Rv )−3.50[ 6] km/s Proper motion (μ)RA: +22.20[ 1] mas /yr Dec.: −29.49[ 1] mas /yr Parallax (π)6.05± 0.36 mas [ 1] Distance 540 ± 30 ly pc ) Absolute magnitude (MV )−1.62[ 2] Details 32 Per A Mass ± 0.1[ 7] M ☉ Radius 3.1[ 8] R ☉ Luminosity 671[ 2] L ☉ Surface gravity (log g )4.076[ 9] cgs Temperature 16,421[ 9] K Rotational velocity (v sin i )200[ 9] Age ± 3.4[ 7] Myr Other designations 34 Per ,BD +49°945FK5 1549GC 4133HD 21428HIP 16244HR 1044SAO 38872CCDM J03294+4931ABWDS J03294+4931AB[ 10] Database references SIMBAD data
34 Persei is abinary star [ 3] constellation ofPerseus . It is visible to the naked eye as a faint, blue-white hued point of light with a combinedapparent visual magnitude of 4.67.[ 2] light years away from the Sun based onparallax ,[ 1] radial velocity of −3.5 km/s.[ 6] Alpha Persei Cluster .[ 11]
The primary member, designated component A, is aB-type main-sequence star with astellar classification of B3V[ 4] [ 3] [ 7] projected rotational velocity of 200 km/s.[ 9] [ 7] mass of the Sun and about 3.1[ 8] Sun's radius . It is radiating 671[ 2] Sun's luminosity from itsphotosphere at aneffective temperature of 16,421 K.[ 9]
The secondary companion, component B, has anangular separation of″ [ 12]
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