Tags: Star.
RS Ophiuchi (RS Oph) is a recurrent nova system approximately 5000 light-years away in the constellation Ophiuchus. In its quiet phase it has an apparent magnitude of about 12.5. It erupted in 1898 1933 1958 1967 1985 and 2006 and reached about magnitude 5 on average. The recurrent nova is produced by a white dwarf star and a red giant circling about each other in a close orbit.
