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R Canum Venaticorum

Topic: Astronomy

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Short description: Star in the constellation Canes Venatici
R Canum Venaticorum
250px
The visual band light curve of R Canum Venaticorum, from AAVSO data[1]
Observation data
Equinox J2000.0]] (ICRS)
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
Evolutionary stage AGB[4]
Spectral type M5.5e-M9e[3]
U−B color index +0.41[5]
B−V color index +1.22[5]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)−6.80[6] km/s
Proper motion (μ) RA: −1.115[2] mas/yr
Dec.: −5.148[2] mas/yr
Parallax (π)2.1711 ± 0.1262[2] mas
Distance1,500 ± 90 ly
(460 ± 30 pc)
Details
Mass2.26[7] M☉
Radius664[7] R☉
Luminosity29,251[8] L☉
Surface gravity (log g)2.19[9] cgs
Temperature3,108[8] K
Metallicity [Fe/H]−0.25[9] dex
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.[10] It appeared with its variable star designation, R Canum Venaticorum in Annie Jump Cannon's 1907 work Second Catalogue of Variable Stars.[11]

Having exhausted its core helium, R Canum Venaticorum is on the asymptotic giant branch, producing energy from concentric hydrogen and helium shells.[4]

References

  1. ↑ "Download Data". AAVSO. https://www.aavso.org/data-download. 
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 VSX (4 January 2010). "R Canum Venaticorum". AAVSO Website. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=5018. Retrieved 26 June 2014. 
  4. ↑ 4.0 4.1 Eggen, Olin J. (1992). "Asymptotic Giant Branch Stars Near the Sun". The Astronomical Journal 104: 275. doi:10.1086/116239. Bibcode: 1992AJ....104..275E. 
  5. ↑ 5.0 5.1 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. 
  6. ↑ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759–771. doi:10.1134/S1063773706110065. Bibcode: 2006AstL...32..759G. 
  7. ↑ 7.0 7.1 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. doi:10.1051/0004-6361/202142146. Bibcode: 2022A&A...657A...7K. 
  8. ↑ 8.0 8.1 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. doi:10.3847/0004-6256/151/3/59. Bibcode: 2016AJ....151...59C. 
  9. ↑ 9.0 9.1 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G. et al. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics 691: A98. doi:10.1051/0004-6361/202451427. Bibcode: 2024A&A...691A..98K. 
  10. ↑ Espin, T. E. (April 1888). "Entdeckung eines neuen Veränderlichen im Sternbilde Canes venatici". Astronomische Nachrichten 119: 39. Bibcode: 1888AN....119...39E. 
  11. ↑ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory 55: 1–94. Bibcode: 1907AnHar..55....1C. 



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