VY Pyxidis

VY Pyxidis is a BL Herculis variable (type II Cepheid) in the constellation of Pyxis.[1] It ranges between apparent magnitudes 7.13 and 7.40 over a period of 1.23995 days.[2] Located around 650 light-years distant, it shines with a luminosity approximately 45 times that of the Sun and has a surface temperature of 5892 K.[4]

VY Pyxidis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Pyxis
Right ascension  08h 54m 29.63102s[1]
Declination −23° 31′ 18.5775″[1]
Apparent magnitude (V) 7.13 - 7.40[2]
Characteristics
Evolutionary stage Type II Cepheid
Spectral type F4III[1]
Astrometry
Proper motion (μ) RA: 11.67 ± 0.33[3] mas/yr
Dec.: 29.33 ± 0.35[3] mas/yr
Parallax (π)5.01 ± 0.44[3] mas
Distance650 ± 60 ly
(200 ± 20 pc)
Other designations
VY Pyx, BD−22° 2440, HD 76296, HIP 43736, SAO 176679
Database references
SIMBADdata

References
  1. "V* VY Pyx". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 13 July 2014.
  2. Wils, Patrick (15 November 2011). "VY Pyxidis". AAVSO Website. American Association of Variable Star Observers. Retrieved 13 July 2014.
  3. van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  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.


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