4 Persei

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

Location of 4 Persei (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 02h 02m 18.10869s[1]
Declination 54° 29′ 15.1488″[1]
Apparent magnitude (V) 5.04[2]
Characteristics
Spectral type B8III[3]
U−B color index -0.32[2]
B−V color index -0.08[2]
Astrometry
Radial velocity (Rv) -2.30[4] km/s
Proper motion (μ) RA: +34.32[1] mas/yr
Dec.: -3.27[1] mas/yr
Parallax (π) 4.48 ± 0.23[1] mas
Distance 730 ± 40 ly
(220 ± 10 pc)
Absolute magnitude (MV) -1.75[5]
Details
Luminosity 670[5] L
Surface gravity (log g) 4.19[6] cgs
Temperature 12,230[6] K
Metallicity [Fe/H] +0.30[6] dex
Rotational velocity (v sin i) 60[7] km/s
Other designations
g Persei, BD+53°439, FK5 1054, GC 2442, HIP 9505, HR 590, HD 12303, SAO 22859
Database references
SIMBAD data

4 Persei (4 Per) is a class B8III[3] (blue giant) star in the constellation Perseus. Its apparent magnitude is 5.04[2] and it is approximately 730 light years away based on parallax.[1]

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. Bibcode:2007A&A...474..653V. arXiv:0708.1752Freely accessible. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  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. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. 
  5. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. Bibcode:2012AstL...38..331A. arXiv:1108.4971Freely accessible. doi:10.1134/S1063773712050015.  Vizier catalog entry
  6. ^ a b c Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. Bibcode:2011A&A...525A..71W. arXiv:1009.1491Freely accessible. doi:10.1051/0004-6361/201015014. 
  7. ^ 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.