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Epoch J2000.0 Equinox J2000.0
|Right ascension||23h 38m 45.1329s|
|Declination||35° 46′ 21.2432″|
|Apparent magnitude (V)||7.7 to 11.8|
|Proper motion (μ)|| RA: −0.271±0.060  mas/yr |
Dec.: −2.573±0.046  mas/yr
|Parallax (π)||0.5371 ± 0.0488 mas|
|Distance||6,100 ± 600 ly |
(1,900 ± 200 pc)
ST Andromedae, ST And, HD 222241, HIP 116681, BD+34 4974
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.
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.
- 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.
- 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.
- 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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