ST Andromedae
 ST Andromedae in optical light | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 38m 45.1329s[1] |
| Declination | 35° 46′ 21.2432″[1] |
| Apparent magnitude (V) | 7.7 to 11.8[2] |
| Characteristics | |
| Spectral type | C4,3e-C6,4e[2] |
| Variable type | SRa[2] |
| Astrometry | |
| Proper motion (μ) | RA: −0.271±0.060 [1] mas/yr Dec.: −2.573±0.046 [1] mas/yr |
| Parallax (π) | 0.5371 ± 0.0488[1] mas |
| Distance | 6,100 ± 600 ly (1,900 ± 200 pc) |
| Details | |
| Luminosity | 2,660[3] L☉ |
| Temperature | 2,825[3] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
ST Andromedae is a variable star in the constellation of Andromeda. It is classified as a semiregular variable pulsating giant star of specific type SRA, and varies from an apparent visual magnitude of 11.8 at minimum brightness to a magnitude of 7.7 at maximum brightness, with a period of approximately 326.6 days.[2]
Observational history[edit]
The variable nature of ST Andromedae was discovered by Williamina Fleming, in 1906, by examining photographic plates taken for the purpose of creating the Henry Draper Catalogue.[4]
References[edit]
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 2.2 2.3 ST And, database entry, Combined General Catalog of Variable Stars (GCVS4.2, 2004 Ed.), N. N. Samus, O. V. Durlevich, et al., CDS ID II/250 Accessed on line 2009-06-30.
- ↑ 3.0 3.1 Bogdanov, M. B.; Taranova, O. G. (2012). "IR photometry and dust-shell models for two carbon stars". Astronomy Reports. 56 (2): 124. Bibcode:2012ARep...56..124B. doi:10.1134/S1063772912020011.
- ↑ Pickering, E. C.; Fleming, W. P. (1906). "Stars having peculiar spectra. Thirteen new variable stars". Astrophysical Journal. 23: 257–261. Bibcode:1906ApJ....23..257P. doi:10.1086/141337.
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