Astronomy:S Pegasi
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Short description: Variable star in the constellation Pegasus
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Pegasus |
| Right ascension | 23h 20m 32.61407s[2] |
| Declination | +08° 55′ 08.1398″[2] |
| Apparent magnitude (V) | 6.9 - 13.8[3] |
| Characteristics | |
| Spectral type | M5e - M8.5e[3] |
| Variable type | Mira[3] |
| Astrometry | |
| Parallax (π) | 2.52 ± 2.26[2] mas |
| Distance | approx. 1,000 ly (approx. 400 pc) |
| Details | |
| Radius | 459 - 574[4] R☉ |
| Luminosity | 3,221[5] L☉ |
| Temperature | 2,107[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
S Pegasi (S Peg) is a Mira variable star in the constellation Pegasus. It varies between magnitude 7 and 13 with a period of 319.22 days.[3] It is believed to be pulsating in the first overtone. First overtone pulsators have masses less than 1.8 M☉ at a temperature of 2,107 K, and less than 1.4 M☉ at the luminosity of S Pegasi.[5]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 3.0 3.1 3.2 3.3 Samus, N. N. et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S 1. Bibcode: 2009yCat....102025S.
- ↑ Van Belle, G. T.; Thompson, R. R.; Creech-Eakman, M. J. (2002). "Angular Size Measurements of Mira Variable Stars at 2.2 Microns. II". The Astronomical Journal 124 (3): 1706–1715. doi:10.1086/342282. Bibcode: 2002AJ....124.1706V.
- ↑ 5.0 5.1 5.2 Serkowski, Krzysztof; Shawl, Stephen J. (2001). "Polarimetry of 167 Cool Variable Stars: Data". The Astronomical Journal 122 (4): 2017. doi:10.1086/323105. Bibcode: 2001AJ....122.2017S.
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