ST Andromedae

ST Andromedae
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]
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
Other designations
	ST Andromedae, ST And, HD 222241, HIP 116681, BD+34 4974
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

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.^[3]

References

1 2 3 4 5 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.
1 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.
↑ 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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[Gaia_DR2-1] 1 2 3 4 5 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.

[gcvs-2] 1 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.

[Pickering1906-3] 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.