Zeta Chamaeleontis

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]

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

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. 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
  2. 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.
  3. 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.
  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. 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.
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