PERSON@1 is a binary star , consisting of the red giant PERSON@1 A along with PERSON@2 A is also an oscillating variable star and was the first non-supernova variable star discovered , with the possible exception of PERSON@3 .

PERSON@1 is a binary star system with a white dwarf -LRB- Mira B -RRB- star and a red giant -LRB- PERSON@1 A -RRB- .
