DY Persei is a variable star in the Perseus constellation, being a prototype star to the very rare type of DY Persei variables, that pulsate like red variables, but also fade from sight like R Coronae Borealis variables. DY Persei itself is a carbon star that is too dim to see through binoculars, with an apparent magnitude of 10.6.
- ^ a b c SIMBAD, DY Persei (accessed 2 July 2014)
- ^ Alcock, C.; Allsman, R. A.; Alves, D. R.; Axelrod, T. S.; Becker, A.; Bennett, D. P.; Clayton, G. C.; Cook, K. H.; Dalal, N. (2001). "The MACHO Project LMC Variable Star Inventory. X. The R Coronae Borealis Stars". The Astrophysical Journal 554 (1): 298–315. arXiv:astro-ph/0102262. Bibcode:2001ApJ...554..298A. doi:10.1086/321369.