Beta Chamaeleontis

β Chamaeleontis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 12h 18m 20.82459s[1]
Declination −79° 18′ 44.0710″[1]
Apparent magnitude (V) 4.24[2] (4.24 to 4.30[3])
Characteristics
Spectral type B4 V[4]
U−B color index −0.52[2]
B−V color index −0.13[2]
R−I color index −0.10[5]
Astrometry
Radial velocity (Rv)+23.0[6] km/s
Proper motion (μ) RA: −37.97[1] mas/yr
Dec.: +11.15[1] mas/yr
Parallax (π)10.93 ± 0.15[1] mas
Distance298 ± 4 ly
(91 ± 1 pc)
Details
Mass5.0 ± 0.1[7] M☉
Radius2.84 ± 0.13[8] R☉
Luminosity212[9] L☉
Surface gravity (log g)4.03 ± 0.05[8] cgs
Temperature14,495 ± 157[8] K
Rotational velocity (v sin i)255[5] km/s
Age22.7 ± 7.2[7] Myr
Other designations
β Cha, Beta Chamaeleontis, Beta Cha, CD−78 495, CPD−78 741, FK5 459, GC 16775, HD 106911, HIP 60000, HR 4674, PPM 371459, SAO 256924.[10]
Database references
SIMBADdata

Beta Chamaeleontis (Beta Cha, β Chamaeleontis, β Cha) is a B-type main sequence star and is the third-brightest star in the constellation of Chamaeleon.[10] It has an apparent visual magnitude that varies between 4.24 and 4.30.[3]

References

  1. 1 2 3 4 5 van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, Bibcode:2007A&A...474..653V, arXiv:0708.1752 Freely accessible, doi:10.1051/0004-6361:20078357.
  2. 1 2 3 Feinstein, A.; Marraco, H. G. (November 1979), "The photometric behavior of Be Stars", Astronomical Journal, 84: 1713–1725, Bibcode:1979AJ.....84.1713F, doi:10.1086/112600.
  3. 1 2 NSV 5532, database entry, New Catalogue of Suspected Variable Stars, the improved version, Sternberg Astronomical Institute, Moscow, Russia. Accessed on line September 5, 2008.
  4. ↑ Houk, N.; Cowley, A. P. (1975), "Catalogue of two-dimensional spectral types for the HD stars", University of Michigan, I, Bibcode:1975MSS...C01....0H
  5. 1 2 HR 4674, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 5, 2008.
  6. ↑ Wielen, R.; et al. (1999), Sixth Catalogue of Fundamental Stars (FK6). Part I. Basic fundamental stars with direct solutions (35), Astronomisches Rechen-Institut Heidelberg, Bibcode:1999VeARI..35....1W.
  7. 1 2 Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, Bibcode:2011MNRAS.410..190T, arXiv:1007.4883 Freely accessible, doi:10.1111/j.1365-2966.2010.17434.x
  8. 1 2 3 Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", The Astronomical Journal, 129 (3): 1642–1662, Bibcode:2005AJ....129.1642F, arXiv:astro-ph/0412542 Freely accessible, doi:10.1086/427855
  9. ↑ McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, Bibcode:2012MNRAS.427..343M, arXiv:1208.2037 Freely accessible, doi:10.1111/j.1365-2966.2012.21873.x.
  10. 1 2 "bet Cha -- Variable Star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-12-10.
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