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.[3]

R Ursae Minoris

A visual band light curve for R Ursae Minoris, plotted from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Ursa Minor
Right ascension 16h 29m 57.8923s[2]
Declination +72° 16′ 49.166″[2]
Apparent magnitude (V) 8.5-11.5[3]
Characteristics
Spectral type M7IIIe[3]
Variable type semiregular variable[3]
Astrometry
Proper motion (μ) RA: 11.973±0.085[2] mas/yr
Dec.: 13.976±0.092[2] mas/yr
Parallax (π)2.6648 ± 0.0629 mas[2]
Distance1,220 ± 30 ly
(375 ± 9 pc)
Absolute magnitude (MV)+2.461[4] (var)
Details
Mass1.71[5] M☉
Radius686[6] R☉
Surface gravity (log g)−0.46[5] cgs
Temperature2,875[5] K
Metallicity [Fe/H]+0.07[5] dex
Other designations
R UMi, BD+72°732a, HD 149683, HIP 80802[7]
Database references
SIMBADdata

References
  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
  3. Watson, Christopher (4 January 2010). "RR Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. Retrieved 10 March 2015.
  4. Gontcharov, G. A. (2017). "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)". VizieR On-Line Data Catalog. Bibcode:2017yCat..90370769G.
  5. Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode:2022yCat.1354....0A.
  6. Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. S2CID 237605138.
  7. "R UMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-10-10.


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