Zeta Chamaeleontis

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ζ Chamaeleontis
Observation data
Epoch J2000      Equinox J2000
Constellation Chamaeleon
Right ascension 09h 33m 53.37609s[1]
Declination −80° 56′ 28.5337″[1]
Apparent magnitude (V) 5.022[2]
Characteristics
Spectral type B5V[2]
Astrometry
Radial velocity (Rv)−42.0±4.2 km/s
Proper motion (μ) RA: −34.81±0.17[1] mas/yr
Dec.: +14.18±0.16[1] mas/yr
Parallax (π)5.70 ± 0.15[1] mas
Distance570 ± 20 ly
(175 ± 5 pc)
Absolute magnitude (MV)−1.15[2]
Details
Luminosity522[3] L☉
Temperature13,544[3] K
Other designations
CPD−80° 365, HD 83979, HIP 46928, HR 3860, SAO 258538
Database references
SIMBADdata

Zeta Chamaeleontis, Latinized from ζ Chamaeleontis, is a star located in the constellation Chamaeleon. Located around 570 light-years distant, it shines with a luminosity approximately 522 times that of the Sun and has a surface temperature of 13,544 K.[3] South African Astronomer A.W.J. Cousins noted it to vary between magnitudes 5.06 and 5.17 in 1960.[4] It was classified as a Beta Cephei variable in the Hipparcos and Tycho Catalogues (ESA 1997), with a period of 1.07 days,[5] before being reclassified as a Slowly pulsating B star in the 2011 version.[6]

It is a B5V dwarf star with an effective temperature of 15000 Kelvin, an absolute magnitude of -1.02 and a mass of 5.9 solar masses. It is located 165.1 pc (538.5 light years) from the Sun.

References[]

  1. ^ a b c d e van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600
  2. ^ a b c Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
  3. ^ a b c McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental Parameters and Infrared Excesses of Hipparcos Stars". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
  4. ^ Cousins, A.W.J. (1960). "New Bright Variable Stars". Monthly Notes of the Astronomical Society of Southern Africa. 19: 56. Bibcode:1960MNSSA..19...56C.
  5. ^ ESA (1997). The HIPPARCOS and TYCHO catalogues. Astrometric and photometric star catalogues derived from the ESA HIPPARCOS Space Astrometry Mission. Esa Special Publication. 1200. Bibcode:1997ESASP1200.....E. ISBN 9290923997.
  6. ^ Dubath, P.; Rimoldini, L.; Süveges, M.; Blomme, J.; López, M.; Sarro, L. M.; De Ridder, J.; Cuypers, J.; Guy, L.; Lecoeur, I.; Nienartowicz, K.; Jan, A.; Beck, M.; Mowlavi, N.; De Cat, P.; Lebzelter, T.; Eyer, L. (2011). "Random forest automated supervised classification of Hipparcos periodic variable stars". Monthly Notices of the Royal Astronomical Society. 414 (3): 2602–17. arXiv:1101.2406. Bibcode:2011MNRAS.414.2602D. doi:10.1111/j.1365-2966.2011.18575.x. S2CID 118560311.
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