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R Ursae Minoris

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Star in the constellation Ursa Minor
R Ursae Minoris

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

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.

In 1881, Edward Charles Pickering announced that the star, at that time unnamed, is a variable star. It was listed with its variable star designation, R Ursae Minoris, in Annie Jump Cannon's 1907 work Second Catalog of Variable Stars.

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.
  8. Pickering, Edward C. (November 1881). "Stars with peculiar spectra, discovered at the Astronomical Observatory of Harvard College". Astronomische Nachrichten. 101 (5): 73. Bibcode:1881AN....101...73P. doi:10.1002/asna.18821010504. Retrieved 16 December 2024.
  9. Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 16 December 2024.
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