University of Wisconsin

Space Astronomy Laboratory



OBJECT: Phi Perseus (PHI-PER)
Other names: HD 10516
ID # 2203

UW Astronomer: Karen Bjorkman

Phi-Per is a Be star located in the constellation Perseus, which lies between Cassiopeia and Andromeda. To locate, turn toward the north in late summer and autumn, draw a line from the Pole star to Cassiopia. Perseus hardly rises above the horizon in the southern hemisphere.

Phi Perseus has a mid-spectral type (B1.5) and is a shell star. Phi-Per is a known binary (has a companion star), but there is no evidence of a binary period in polarization observations.