R Ursae Minoris
R Ursae Minoris is a star in the constellation Ursa Minor. A red giant of spectral type M7IIIe, it is a semiregular variable ranging from magnitude 8.5 to 11.5 over a period of 325 days.[2]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Minor |
| Right ascension | 16h 29m 57.8935s[1] |
| Declination | +72° 16′ 49.1638″[1] |
| Apparent magnitude (V) | 8.5-11.5[2] |
| Characteristics | |
| Spectral type | M7IIIe[2] |
| Variable type | semiregular variable[2] |
| Astrometry | |
| Proper motion (μ) | RA: 11.642±0.286[1] mas/yr Dec.: 14.111±0.306[1] mas/yr |
| Parallax (π) | 2.5840 ± 0.1132[1] mas |
| Distance | 1,260 ± 60 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). "RR Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
- "R UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.
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