PSR B1257+12
The pulsar has a planetary system with three known planets , named "Draugr" ( PSR B1257+12 b or PSR B1257+12 A ) , "Poltergeist" ( PSR B1257+12 c , or PSR B1257+12 B ) and "Phobetor" ( PSR B1257+12 d , or PSR B1257+12 C ) , respectively . 
<triplet> planetary system <subj> planet <obj> has parts of the class <triplet> planet <subj> planetary system <obj> part of <triplet> PSR B1257+12 A <subj> PSR B1257+12 <obj> parent astronomical body <subj> PSR B1257+12 <obj> parent astronomical body <subj> PSR B1257+12 <obj> parent astronomical body