Alpheratz

Alpheratz

(al-feer -ats) (Sirrah; α And) A bluish-white giant that is the brightest star in the constellation Andromeda. It is both a spectroscopic binary (period 96.7 days) and a spectrum variable. It originally lay in the constellation Pegasus, as Delta (δ) Pegasi, and is still considered part of the Great Square of Pegasus. m_v : 2.07; spectral type: B9p III; distance: 31 pc.