R Canum Venaticorum is a

Mira variable Mira variables (named for the prototype star Mira) are a class of pulsating stars characterized by very red colours, pulsation periods longer than 100 days, and amplitudes greater than one magnitude in infrared and 2.5 magnitude at visual wavelen ...

star in the constellation

Canes Venatici Canes Venatici () is one of the IAU designated constellations, 88 constellations designated by the International Astronomical Union (IAU). It is a small northern constellation that was created by Johannes Hevelius in the 17th century. Its name is ...

. It ranges between magnitudes 6.5 and 12.9 over a period of approximately 329 days.

References

Mira variables Canes Venatici Canum Venaticorum, R 120499 M-type giants 067410 Durchmusterung objects Emission-line stars {{giant-star-stub