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AK Pyxidis is a semiregular variable star located in the constellation Pyxis. It varies between magnitudes 6.09 and 6.51,[3] pulsating to multiple periods simultaneously of 55.5, 57.9, 86.7, 162.9 and 232.6 days.[1] Located around 1228 light-years distant, it shines with a luminosity approximately 1500 times that of the Sun and has a surface temperature of 3410 K.[4]

AK Pyxidis

A visual band light curve for AK Pyxidis, plotted from data published by Tabur et al. (2009)[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Pyxis
Right ascension 08h 48m 14.62631s[2]
Declination −28° 38′ 19.6757″[2]
Apparent magnitude (V) 6.09-6.51[3]
Characteristics
Spectral type M5III [3]
Variable type semiregular variable[3]
Astrometry
Proper motion (μ) RA: -10.60 ± 0.29[2] mas/yr
Dec.: −8.05 ± 0.29[2] mas/yr
Parallax (π)4.68 ± 0.41 mas[2]
Distance700 ± 60 ly
(210 ± 20 pc)
Details
Luminosity1500[4] L☉
Temperature3410 K[4] K
Other designations
AK Pyxidis, CD−61° 1428, HD 75306, HIP 43215, SAO 176496.[5]
Database references
SIMBADdata

References


  1. Tabur, V.; Bedding, T.R. (2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945–61. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x. S2CID 15358380.
  2. 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
  3. Watson, Christopher (25 August 2009). "AK Pyxidis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 29 July 2015.
  4. 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.
  5. "V* AK Pyx". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 September 2015.


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