R Corvi

R Corvi (R Crv) is a Mira variable star in the constellation Corvus, which ranges from a magnitude of 6.7 to 14.4 with a period of approximately 317 days.[2] In the sky it appears close to Gamma Corvi and can be seen in the same binocular field.[3] Extrapolating its luminosity from its period of 317 days yields a distance of 810 parsecs.[4]

R Crv
Observation data
Epoch J2000      Equinox J2000
Constellation Corvus
Right ascension  12h 19m 37.8727s[1]
Declination −19° 15′ 21.877″[1]
Apparent magnitude (V) 6.70[1]
Characteristics
Spectral type M4.5-9:e[1]
B−V color index 3.70[1]
Variable type Mira[2]
Astrometry
Radial velocity (Rv)-22.00[1] km/s
Proper motion (μ) RA: -1.20[1] mas/yr
Dec.: -10.03[1] mas/yr
Distance810 pc
Other designations
BD-18° 3367, HD 107199, HIP 60106, SAO 157211.
Database references
SIMBADdata

References
  1. "R Crv". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 June 2014.
  2. VSX (4 January 2010). "R Corvi". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
  3. Garfinkle, Robert A. (1997), Star-Hopping: Your Visa to Viewing the Universe, Cambridge University Press, p. 108, ISBN 0-521-59889-3
  4. Whitelock, Patricia A.; Feast, Michael W.; van Leeuwen, Floor (2008). "AGB variables and the Mira period-luminosity relation". Monthly Notices of the Royal Astronomical Society. 386 (1): 313–23. arXiv:0801.4465. Bibcode:2008MNRAS.386..313W. doi:10.1111/j.1365-2966.2008.13032.x.


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