RY Sagittarii
RY Sagittarii is a yellow supergiant and an R Coronae Borealis type variable star in the constellation Sagittarius . 
<triplet> RY Sagittarii <subj> R Coronae Borealis type <obj> type of variable star <subj> Sagittarius <obj> constellation <triplet> Sagittarius <subj> constellation <obj> instance of