Astronomy:S Ursae Minoris
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Short description: Star in the constellation Ursa Minor
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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 | |
| Evolutionary stage | AGB[4] |
| Spectral type | M6e-M9e[3] |
| Variable type | Mira[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[2] mas |
| Distance | 1,280 ± 80 ly (390 ± 20 pc) |
| Details | |
| Mass | 2.3[5] M☉ |
| Radius | 744[6] R☉ |
| Luminosity | 3,896[4] L☉ |
| Surface gravity (log g) | 1.63[5] cgs |
| Temperature | 3,457[5] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
S Ursae Minoris (S UMi) is a Mira variable star in the constellation Ursa Minor, ranging from magnitude 7.5 to fainter than 13.2 over a period of 331 days.[3]
Williamina Fleming discovered that the star's brightness varies, in 1895.[8]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 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. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=37376. Retrieved 25 August 2025.
- ↑ 4.0 4.1 López Martí, B.; Jiménez-Esteban, F. M.; Engels, D.; García-Lario, P. (2025). "The Gaia Catalogue of Galactic AGB Stars: I. OH/IR stars". Astronomy and Astrophysics 698. doi:10.1051/0004-6361/202453125. Bibcode: 2025A&A...698A.109L.
- ↑ 5.0 5.1 5.2 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K.
- ↑ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs". Astronomy and Astrophysics 657. doi:10.1051/0004-6361/202142146. Bibcode: 2022A&A...657A...7K.
- ↑ "S UMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=S+UMi.
- ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1-94. Bibcode: 1907AnHar..55....1C. https://articles.adsabs.harvard.edu/pdf/1907AnHar..55....1C. Retrieved 24 August 2025.
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