Beta Chamaeleontis

β Chamaeleontis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Chamaeleon
Right ascension 12h 18m 20.8242s[1]
Declination −79° 18 44.063[1]
Apparent magnitude (V) 4.24 to 4.30[2]
Characteristics
Spectral type B5Vn[1]
U−B color index −0.51[3]
B−V color index −0.12[3]
R−I color index −0.10[3]
Astrometry
Radial velocity (Rv)23 ± 5[1] km/s
Proper motion (μ) RA: −38.07[1] mas/yr
Dec.: 12.00[1] mas/yr
Parallax (π)12.05 ± 0.51[1] mas
Distance270 ± 10 ly
(83 ± 4 pc)
Absolute magnitude (MV)−0.3[4]
Details
Mass5.0 ± 0.1[5] M
Radius2.84 ± 0.13[6] R
Surface gravity (log g)4.03 ± 0.05[6] cgs
Temperature14,495 ± 157[6] K
Rotational velocity (v sin i)255[3] km/s
Age22.7 ± 7.2[5] 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.[1]
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.[1] It has an apparent visual magnitude which varies between 4.24 and 4.30.[2]

References

  1. 1 2 3 4 5 6 7 8 9 NSV 5532 -- Variable Star, database entry, SIMBAD. Accessed on line September 5, 2008.
  2. 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.
  3. 1 2 3 4 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.
  4. From apparent magnitude and parallax.
  5. 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, arXiv:1007.4883, Bibcode:2011MNRAS.410..190T, doi:10.1111/j.1365-2966.2010.17434.x
  6. 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, arXiv:astro-ph/0412542, Bibcode:2005AJ....129.1642F, doi:10.1086/427855
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