S Ursae Minoris
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.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 15h 29m 34.5775s[1] |
| Declination | +78° 38′ 00.2742″[1] |
| Apparent magnitude (V) | 7.5-<13.2[2] |
| Characteristics | |
| Spectral type | M6e-M9e[2] |
| Variable type | long period variable[2] |
| Astrometry | |
| Proper motion (μ) | RA: −30.986±0.303[1] mas/yr Dec.: 7.006±0.309[1] mas/yr |
| Parallax (π) | 2.5455 ± 0.1578[1] mas |
| Distance | 1,280 ± 80 ly (390 ± 20 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
References
- 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.
- Watson, Christopher (4 January 2010). "S Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
- "S UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.
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