R Canum Venaticorum

R Canum Venaticorum

The visual band light curve of R Canum Venaticorum, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Canes Venatici
Right ascension 13h 48m 57.0416s[2]
Declination +39° 32′ 33.174″[2]
Apparent magnitude (V) 6.5 - 12.9[3]
Characteristics
Spectral type M5.5e-M9e[3]
U−B color index +0.41[4]
B−V color index +1.22[4]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)−6.80[5] km/s
Proper motion (μ) RA: −1.115[2] mas/yr
Dec.: −5.148[2] mas/yr
Parallax (π)2.1711 ± 0.1262 mas[2]
Distance1,500 ± 90 ly
(460 ± 30 pc)
Details
Mass2.26[6] M☉
Radius664[6] R☉
Luminosity29,251[7] L☉
Temperature3,108[7] K
Other designations
R CVn, SAO 63763, GSC 03027-00252, BD+40°2694, HD 120499, DO 14814, GC 18671, HIP 67410, HR 5199
Database references
SIMBADdata

R Canum Venaticorum is a Mira variable star in the constellation Canes Venatici. It ranges between magnitudes 6.5 and 12.9 over a period of approximately 329 days.[3] It is too faint to be seen with the naked eye, but when it is near its maximum brightness, it can be seen with binoculars.

Thomas E. Espin discovered this variable star, in 1888.[8] It appeared with its variable star designation, R Canum Venaticorum, in Annie Jump Cannon's 1907 work, Second Catalogue of Variable Stars.[9]

References

  1. ^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. ^ a b c d e 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. ^ a b c d VSX (4 January 2010). "R Canum Venaticorum". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 June 2014.
  4. ^ a b Myers, J. R.; Sande, C. B.; Miller, A. C.; Warren, W. H.; Tracewell, D. A. (2015). "VizieR Online Data Catalog: SKY2000 Master Catalog, Version 5 (Myers+ 2006)". Vizier Online Data Catalog. Bibcode:2015yCat.5145....0M.
  5. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. ^ a b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3. Proper-motion anomaly and resolved common proper-motion pairs". Astronomy and Astrophysics. 657: 657. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. S2CID 237605138.
  7. ^ a b Chandler, Colin Orion; et al. (2016). "The Catalog of Earth-Like Exoplanet Survey Targets (CELESTA): A Database of Habitable Zones Around Nearby Stars". The Astronomical Journal. 151 (3): 59. arXiv:1510.05666. Bibcode:2016AJ....151...59C. doi:10.3847/0004-6256/151/3/59. S2CID 119246448.
  8. ^ Espin, T. E. (April 1888). "Entdeckung eines neuen Veränderlichen im Sternbilde Canes venatici". Astronomische Nachrichten. 119. Bibcode:1888AN....119...39E. Retrieved 6 January 2025.
  9. ^ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 6 January 2025.


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