Astronomy:J Centauri
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Short description: Star in the constellation Centaurus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 13h 22m 37.9331s[2] |
| Declination | −60° 59′ 18.170″[2] |
| Apparent magnitude (V) | +4.505[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | B3V[4] |
| U−B color index | −0.62[5] |
| B−V color index | −0.13[5] |
| Astrometry | |
| Radial velocity (Rv) | +6.0[6] km/s |
| Proper motion (μ) | RA: −29.518[2] mas/yr Dec.: −21.698[2] mas/yr |
| Parallax (π) | 8.8824 ± 0.1293[2] mas |
| Distance | 367 ± 5 ly (113 ± 2 pc) |
| Absolute magnitude (MV) | −0.66[1] |
| Details | |
| Mass | 4.1[2][7] M☉ |
| Radius | 3.6[2] R☉ |
| Luminosity | 265[7] L☉ |
| Surface gravity (log g) | 3.97[2] cgs |
| Temperature | 24,757[7] K |
| Rotational velocity (v sin i) | 223[8] km/s |
| Age | 15.4[9] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
J Centauri (J Cen) is a star in the constellation Centaurus. Its mean apparent magnitude is 4.5, making it easily visible to the naked eye. It is approximately 350 light years from Earth.
J Centauri is a spectral class B3V main sequence star with a luminosity 265 times that of the Sun. The temperature of the star's photosphere is nearly 25,000 K. The rotation velocity at the equator is at least 223 km/s.[8] It is believed to be a binary star system.[10]
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.[11]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 "CCDM J13226-6059AB -- Double or multiple star". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=CCDM+J13226-6059AB.
- ↑ Hiltner, W. A.; Garrison, R. F.; Schild, R. E. (July 1969). "MK Spectral Types for Bright Southern OB Stars". The Astrophysical Journal 157: 313. doi:10.1086/150069. Bibcode: 1969ApJ...157..313H.
- ↑ 5.0 5.1 Landolt, Arlo U. (August 1969). "UBV Observations of Selected Double Systems, II". Publications of the Astronomical Society of the Pacific 81 (481): 443–446. doi:10.1086/128801. Bibcode: 1969PASP...81..443L.
- ↑ Jilinski, E.; Daflon, S.; Cunha, K.; de La Reza, R. (March 2006). "Radial velocity measurements of B stars in the Scorpius–Centaurus association". Astronomy and Astrophysics 448 (3): 1001–1006. doi:10.1051/0004-6361:20041614. Bibcode: 2006A&A...448.1001J.
- ↑ 7.0 7.1 7.2 Quintana, Alexis L.; Wright, Nicholas J.; Martínez García, Juan (2025). "A census of OB stars within 1 KPC and the star formation and core collapse supernova rates of the Milky Way". Monthly Notices of the Royal Astronomical Society 538 (3): 1367. doi:10.1093/mnras/staf083. Bibcode: 2025MNRAS.538.1367Q.
- ↑ 8.0 8.1 Wolff, S. C. (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. doi:10.1086/511002. Bibcode: 2007AJ....133.1092W.
- ↑ Gratton, R.; Squicciarini, V.; Nascimbeni, V.; Janson, M.; Reffert, S.; Meyer, M.; Delorme, P.; Mamajek, E. E. et al. (2023). "Multiples among B stars in the Scorpius-Centaurus association". Astronomy and Astrophysics 678: A93. doi:10.1051/0004-6361/202346806. Bibcode: 2023A&A...678A..93G.
- ↑ Shatsky, N.; Tokovinin, A. (2002). "The mass ratio distribution of B-type visual binaries in the Sco OB2 association". Astronomy and Astrophysics 382: 92–103. doi:10.1051/0004-6361:20011542. Bibcode: 2002A&A...382...92S.
- ↑ Lub, J.; de Geus, E. J.; van de Grift, E. (October 1990). "Walraven photometry of nearby southern OB associations". Astronomy and Astrophysics Supplement Series 85 (2): 915–970. Bibcode: 1990A&AS...85..915D.
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