AK Pyxidis is a semiregular variable star located in the constellation Pyxis. It varies between magnitudes 6.09 and 6.51,[3] making it very faintly visible to the naked eye under excellent dark sky conditions. It has been found to pulsate with periods of 55.5, 57.9, 86.7, 162.9 and 232.6 days simultaneously.[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]
| 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] |
| Distance | 700 ± 60 ly (210 ± 20 pc) |
| Details | |
| Luminosity | 1500[4] L☉ |
| Temperature | 3410 K[4] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
The variability of AK Pyxidis was discovered during the analysis of the Hipparcos satellite data. It was given the variable star designation AK Pyxidis in 1999.[6]
References
edit- ^ a b 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.
- ^ 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
- ^ a b c d Watson, Christopher (25 August 2009). "AK Pyxidis". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 29 July 2015.
- ^ 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.
- ^ "V* AK Pyx". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 5 September 2015.
- ^ Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (January 1999). "The 74th Special Name-list of Variable Stars" (PDF). Information Bulletin on Variable Stars. 4659: 1. Bibcode:1999IBVS.4659....1K. Retrieved 8 October 2024.
 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |