R Cancri is a Mira variable in the constellation Cancer. Located approximately 250 pc (830 light-years) distant, it varies between magnitudes 6.07 and 12.3 over a period of approximately 357 days.[1] At its brightest, it is very faintly visible to the naked eye.
Friedrich Magnus Schwerd discovered R Cancri in 1829.[2] It was one of the first variable stars to be discovered.[3]
References
- ^ VSX & Otero, S. A. (7 January 2011). "R Cancri". AAVSO Website. American Association of Variable Star Observers. Retrieved 26 Jan 2021.
- ^ Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55: 1–94. Bibcode:1907AnHar..55....1C. Retrieved 20 December 2024.
- ^ "The First Known Variable Stars". Students for the Exploration and Development of Space. Retrieved 1 January 2025.