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34 Persei

34 Persei
Location of 34 Persei (circled)
Observation data
Epoch 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−B color index −0.57[5]
B−V color 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]
Distance540 ± 30 ly
(165 ± 10 pc)
Absolute magnitude (MV)−1.62[2]
Details
32 Per A
Mass6.9±0.1[7] M☉
Radius3.1[8] R☉
Luminosity671[2] L☉
Surface gravity (log g)4.076[9] cgs
Temperature16,421[9] K
Rotational velocity (v sin i)200[9] km/s
Age29.3±3.4[7] Myr
Other designations
34 Per, BD+49°945, FK5 1549, GC 4133, HD 21428, HIP 16244, HR 1044, SAO 38872, CCDM J03294+4931AB, WDS J03294+4931AB[10]
Database references
SIMBADdata

34 Persei is a binary star[3] system in the northern constellation of Perseus. It is visible to the naked eye as a faint, blue-white hued point of light with a combined apparent visual magnitude of 4.67.[2] The system is located approximately 540 light years away from the Sun based on parallax,[1] but it is drifting closer with a radial velocity of −3.5 km/s.[6] It is a likely member of the Alpha Persei Cluster.[11]

The primary member, designated component A, is a B-type main-sequence star with a stellar classification of B3V[4] and visual magnitude 4.76.[3] It is an estimated 29[7] million years old with a high rate of spin, showing a projected rotational velocity of 200 km/s.[9] The star has 6.9[7] times the mass of the Sun and about 3.1[8] times the Sun's radius. It is radiating 671[2] times the Sun's luminosity from its photosphere at an effective temperature of 16,421 K.[9]

The secondary companion, component B, has an angular separation of 0.6″ from the primary and visual magnitude of 7.34.[12]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference XHIP was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Hoffleit1991 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Mallama2014 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference cadars was invoked but never defined (see the help page).
  9. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Zuckerman2012 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference WDS was invoked but never defined (see the help page).
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