VY Pyxidis is a BL Herculis variable (type II Cepheid) in the constellation of Pyxis. It ranges between apparent magnitudes 7.13 and 7.40 over a period of 1.23995 days.[3] Located around 826 light-years distant, it shines with a luminosity approximately 46 times that of the Sun and has a surface temperature of 6,133 K
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pyxis |
| Right ascension | 08h 54m 29.6305s[2] |
| Declination | −23° 31′ 18.575″[2] |
| Apparent magnitude (V) | 7.13 - 7.40[3] |
| Characteristics | |
| Spectral type | F3/5III[4] |
| Variable type | BL Her[3] |
| Astrometry | |
| Proper motion (μ) | RA: 11.081[2] mas/yr Dec.: 29.509[2] mas/yr |
| Parallax (π) | 3.9495 ± 0.0186 mas[2] |
| Distance | 826 ± 4 ly (253 ± 1 pc) |
| Details | |
| Mass | 2.4[5] M☉ |
| Radius | 6.5[6] R☉ |
| Luminosity | 46[6] L☉ |
| Surface gravity (log g) | 2.987[5] cgs |
| Temperature | 6,133[5] K |
| Metallicity [Fe/H] | −0.101[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
edit- ^ Sanwal, N. B.; Sarma, M. B. K. (June 1991). "BV 690, a new Bright Type II Cepheid". Journal of Astrophysics and Astronomy. 12 (2): 119–131. Bibcode:1991JApA...12..119S. doi:10.1007/BF02709301. S2CID 120662105. Retrieved 1 March 2022.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c Wils, Patrick (15 November 2011). "VY Pyxidis". AAVSO Website. American Association of Variable Star Observers. Retrieved 13 July 2014.
- ^ Houk, N.; Smith-Moore, M. (1988), "Catalogue of two-dimensional spectral types for the HD stars, Vol.4", Michigan Spectral Survey, 4, Bibcode:1988mcts.book.....H
- ^ a b c d Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1354....0A.
- ^ a b Chandler, Colin Orion; et al. (2016). "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv:1510.05666. Bibcode:2016AJ....151...59C. doi:10.3847/0004-6256/151/3/59. S2CID 119246448.
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