R Canum Venaticorum

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R Canum Venaticorum
RCVnLightCurve.png
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]
Distance 1,500 ± 90  ly
(460 ± 30  pc)
Details
Mass 2.26 [6]   M
Radius 664 [6]   R
Luminosity 29,251 [7]   L
Temperature 3,108 [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
SIMBAD data

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]

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<span class="mw-page-title-main">HD 121228</span> Star in the constellation Centaurus

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R Trianguli is a short-period oxygen-rich Mira variable in Triangulum with a period of 266.9 days, discovered by T. H. E. C. Espin in 1890. It is losing about 1.1×10−7 M/yr, close to average for a short-period Mira variable. While most short-period Mira variables reside in the Galactic halo, R Trianguli is a member of the thick disk, and its proper motion is fairly high for its distance. Its angular diameter in the K band was measured in 2002 to be, on average, 5.22±0.30 mas, with a shape suggesting that there is an optically thin disk structure surrounding the star.

References

  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. 1 2 3 4 5 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. 1 2 3 4 VSX (4 January 2010). "R Canum Venaticorum". AAVSO Website. American Association of Variable Star Observers . Retrieved 26 June 2014.
  4. 1 2 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. 1 2 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. 1 2 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.