J Centauri

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J Centauri
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Right ascension 13h 22m 37.9371s[1]
Declination –60° 59′ 18.215″[1]
Apparent magnitude (V) +4.505[2]
Spectral type B3V[3]
U−B color index –0.62[4]
B−V color index –0.13[4]
Variable type β Cep
Radial velocity (Rv) +6.0[5] km/s
Proper motion (μ) RA: −35.50[1] mas/yr
Dec.: −15.19[1] mas/yr
Parallax (π) 9.20 ± 0.58[1] mas
Distance 350 ± 20 ly
(109 ± 7 pc)
Luminosity 500[6] L
Surface gravity (log g) 4.22[6] cgs
Temperature 23,970 ± 3,080[7] K
Rotational velocity (v sin i) 223[8] km/s
Other designations
HR 5035, HD 116087, CD−60°4640, FK5 1347, HIP 65271, SAO 252284, GC 18087, CCDM J13226-6059.[2]
Database references

J Centauri (J Cen) is a star in the constellation Centaurus. It is approximately 350 light years from Earth.

J Centauri is a spectral class B3V main sequence star with a mean apparent magnitude of 4.5 and a luminosity 500 times that of the Sun. The temperature of the star's photosphere is nearly 24,000 K. The rotation velocity at the equator is at least 223 km/s.[8] It is believed to be a binary star system.[9]

This star may be a member of the Scorpio-Centaurus OB association (Sco OB2). This is one of the nearest regions of recent star formation.[10]


  1. ^ a b c d e Perryman, M. A. C.; Lindegren; Kovalevsky; Hoeg; Bastian; Bernacca; Crézé; Donati; Grenon; et al. (April 1997). "The HIPPARCOS Catalogue". Astronomy & Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. 
  2. ^ a b "CCDM J13226-6059AB -- Double or multiple star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2009-09-08. 
  3. ^ Hiltner, W. A.; Garrison, R. F.; Schild, R. E.; Garrison; Schild (July 1969). "MK Spectral Types for Bright Southern OB Stars". The Astrophysical Journal. 157: 313. Bibcode:1969ApJ...157..313H. doi:10.1086/150069. 
  4. ^ a b Landolt, Arlo U. (August 1969). "UBV Observations of Selected Double Systems, II". Publications of the Astronomical Society of the Pacific. 81 (481): 443–446. Bibcode:1969PASP...81..443L. doi:10.1086/128801. 
  5. ^ Jilinski, E.; Daflon, S.; Cunha, K.; de La Reza, R.; Daflon; Cunha; de la Reza (March 2006). "Radial velocity measurements of B stars in the Scorpius-Centaurus association". Astronomy and Astrophysics. 448 (3): 1001–1006. arXiv:astro-ph/0601643Freely accessible. Bibcode:2006A&A...448.1001J. doi:10.1051/0004-6361:20041614. 
  6. ^ a b de Geus, E. J.; de Zeeuw, P. T.; Lub, J.; De Zeeuw; Lub (June 1989). "Physical parameters of stars in the Scorpio-Centaurus OB association". Astronomy and Astrophysics. 216 (1–2): 44–61. Bibcode:1989A&A...216...44D. 
  7. ^ Sokolov, N. A. (May 1995). "The determination of T_eff_ of B, A and F main sequence stars from the continuum between 3200 A and 3600 A". Astronomy and Astrophysics Supplement. 110: 553–564. Bibcode:1995A&AS..110..553S. 
  8. ^ a b Wolff, S. C.; et al. (2007). "Rotational Velocities for B0-B3 Stars in Seven Young Clusters: Further Study of the Relationship between Rotation Speed and Density in Star-Forming Regions". The Astronomical Journal. 133 (3): 1092–1103. arXiv:astro-ph/0702133Freely accessible. Bibcode:2007AJ....133.1092W. doi:10.1086/511002. 
  9. ^ Shatsky, N.; Tokovinin, A.; Tokovinin (2002). "The mass ratio distribution of B-type visual binaries in the Sco OB2 association". Astronomy and Astrophysics. 382: 92–103. arXiv:astro-ph/0109456Freely accessible. Bibcode:2002A&A...382...92S. doi:10.1051/0004-6361:20011542. 
  10. ^ de Geus, E. J.; Lub, J.; van de Grift, E.; Lub; Van De Grift (October 1990). "Walraven photometry of nearby southern OB associations". Astronomy and Astrophysics Supplement Series. 85 (2): 915–970. Bibcode:1990A&AS...85..915D.