Astronomy:ST Andromedae

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ST Andromedae
ST Andromedae.jpg
ST Andromedae in optical light
Observation data
Equinox J2000.0]] (ICRS)
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
Distance6,100 ± 600 ly
(1,900 ± 200 pc)
Details
Luminosity2,660[3] L
Temperature2,825[3] K
Other designations
ST Andromedae, ST And, HD 222241, HIP 116681, BD+34 4974
Database references
SIMBADdata

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

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

  1. Jump up to: 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. Jump up to: 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. Jump up to: 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. doi:10.1134/S1063772912020011. Bibcode2012ARep...56..124B. 
  4. Pickering, E. C.; Fleming, W. P. (1906). "Stars having peculiar spectra. Thirteen new variable stars". Astrophysical Journal 23: 257–261. doi:10.1086/141337. Bibcode1906ApJ....23..257P. http://articles.adsabs.harvard.edu/full/1906ApJ....23..257P.