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S Ursae Minoris
SUMiLightCurve.png
The visual band light curve of S Ursae Minoris, from AAVSO data [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Ursa Minor
Right ascension 15h 29m 34.5775s [2]
Declination +78° 38′ 00.2742″ [2]
Apparent magnitude (V) 7.5-<13.2 [3]
Characteristics
Spectral type M6e-M9e [3]
Variable type long period variable [3]
Astrometry
Proper motion (μ) RA: −30.986±0.303 [2]  mas/ yr
Dec.: 7.006±0.309 [2]  mas/ yr
Parallax (π)2.5455 ± 0.1578  mas [2]
Distance1,280 ± 80  ly
(390 ± 20  pc)
Other designations
S UMi, HD 139492, HIP 75847 [4]
Database references
SIMBAD data

S Ursae Minoris (S UMi) is a long period variable star in the constellation Ursa Minor, ranging from magnitude 7.5 to fainter than 13.2 over a period of 331 days. [3]

References

  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ a b c d e 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.
  3. ^ a b c d Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
  4. ^ "S UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.