Astronomy:R 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 | 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[2] mas |
| Distance | 1,220 ± 30 ly (375 ± 9 pc) |
| Absolute magnitude (MV) | +2.461[4] (var) |
| Details | |
| Mass | 1.71[5] M☉ |
| Radius | 686[6] R☉ |
| Surface gravity (log g) | −0.46[5] cgs |
| Temperature | 2,875[5] K |
| Metallicity [Fe/H] | +0.07[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
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]
In 1881, Edward Charles Pickering announced that the star, at that time unnamed, is a variable star.[8] It was listed with its variable star designation, R Ursae Minoris, in Annie Jump Cannon's 1907 work Second Catalog of Variable Stars.[9]
References
- ↑ "Download Data". AAVSO. https://www.aavso.org/data-download.
- ↑ 2.0 2.1 2.2 2.3 2.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 Watson, Christopher (4 January 2010). "RR Ursae Minoris". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=37384. Retrieved 10 March 2015.
- ↑ 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.
- ↑ 5.0 5.1 5.2 5.3 Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O. et al. (2022). "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)". Vizier Online Data Catalog. Bibcode: 2022yCat.1354....0A.
- ↑ Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics 657: A7. doi:10.1051/0004-6361/202142146. Bibcode: 2022A&A...657A...7K.
- ↑ "R UMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=R+UMi.
- ↑ Pickering, Edward C. (November 1881). "Stars with peculiar spectra, discovered at the Astronomical Observatory of Harvard College". Astronomische Nachrichten 101 (5): 73. doi:10.1002/asna.18821010504. Bibcode: 1881AN....101...73P. https://articles.adsabs.harvard.edu/pdf/1882AN....101...73P. Retrieved 16 December 2024.
- ↑ 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 16 December 2024.
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