31 Persei

From Wikipedia, the free encyclopedia
Jump to: navigation, search
31 Persei
Perseus constellation map.svg
Red circle.svg

Location of 31 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03h 19m 07.63892s[1]
Declination 50° 05′ 41.8826″[1]
Apparent magnitude (V) 5.05[2]
Characteristics
Spectral type B5V[3]
U−B color index -0.53[4]
B−V color index -0.06[4]
Astrometry
Radial velocity (Rv) -1.60[5] km/s
Proper motion (μ) RA: +22.46[1] mas/yr
Dec.: -24.80[1] mas/yr
Parallax (π) 5.82 ± 0.30[1] mas
Distance 560 ± 30 ly
(172 ± 9 pc)
Absolute magnitude (MV) -1.44[6]
Details
Luminosity 950[6] L
Temperature 15,301[6] K
Metallicity [Fe/H] 0.00[7] dex
Rotational velocity (v sin i) 260[8] km/s
Other designations
BD+49°902, GC 3945, HIP 15444, HR 989, HD 20418, SAO 38714
Database references
SIMBAD data

31 Persei is a star in the constellation Perseus. Its apparent magnitude is 5.05.[2] Located around 172 parsecs (560 ly) distant,[1] it is a blue main-sequence star of spectral type B5V,[3] a massive star that is currently fusing its core hydrogen. The star is a member of the Alpha Persei Cluster of stars.[9]

References[edit]

  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ a b Mallama, A. (2014). "Sloan Magnitudes for the Brightest Stars". The Journal of the American Association of Variable Star Observers. 42: 443. Bibcode:2014JAVSO..42..443M. Vizier catalog entry
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. arXiv:1606.08053Freely accessible. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  6. ^ a b c Silaj, J.; Landstreet, J. D. (2014). "Accurate age determinations of several nearby open clusters containing magnetic Ap stars". Astronomy & Astrophysics. 566: A132. arXiv:1407.4531Freely accessible. Bibcode:2014A&A...566A.132S. doi:10.1051/0004-6361/201321468. 
  7. ^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters. 38 (12): 771. arXiv:1606.08814Freely accessible. Bibcode:2012AstL...38..771G. doi:10.1134/S1063773712120031.  Vizier catalog entry
  8. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590. 
  9. ^ "31 Persei". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 December 2013.