R Corvi

R Crv
	; The visual band light curve of R Corvi, from AAVSO data
Observation data; Epoch J2000 Equinox J2000
Constellation	Corvus
Right ascension	12h 19m 37.8727s
Declination	−19° 15′ 21.877″
Apparent magnitude (V)	6.70
Characteristics
Spectral type	M4.5-9:e
B−V color index	3.70
Variable type	Mira
Astrometry
Radial velocity (Rv)	-22.00 km/s
Proper motion (μ)	RA: -1.20 mas/yr ; Dec.: -10.03 mas/yr
Distance	810 pc
Other designations
	BD-18° 3367, HD 107199, HIP 60106, SAO 157211.
Database references
SIMBAD	data

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.^[3] In the sky it appears close to Gamma Corvi and can be seen in the same binocular field.^[4] Extrapolating its luminosity from its period of 317 days yields a distance of 810 parsecs.^[5]

Franciszek Karliński discovered that the star's brightness varies, in 1867.^[6]

References

^ "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
^ ^a ^b ^c ^d ^e ^f ^g ^h "R Crv". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 June 2014.
^ ^a ^b VSX (4 January 2010). "R Corvi". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.
^ Garfinkle, Robert A. (1997), Star-Hopping: Your Visa to Viewing the Universe, Cambridge University Press, p. 108, ISBN 0-521-59889-3
^ 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. S2CID 17676993.
^ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Retrieved 28 June 2025.

[aavso-1] "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.

[SIMBAD-2] ^ ^a ^b ^c ^d ^e ^f ^g ^h "R Crv". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 24 June 2014.

[AAVSO-3] VSX (4 January 2010). "R Corvi". AAVSO Website. American Association of Variable Star Observers. Retrieved 24 May 2014.

[garfinkle-4] Garfinkle, Robert A. (1997), Star-Hopping: Your Visa to Viewing the Universe, Cambridge University Press, p. 108, ISBN 0-521-59889-3

[5] 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. S2CID 17676993.

[Cannon1907-6] Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Retrieved 28 June 2025.

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