Alpheratz, Alpha Andromedae, 21 Andromedae
|A second magnitude star that belongs to both the constellation of Andromeda and the
Square of Pegasus. Its brightness is somewhat variable: Sirrah's luminosity varies
as it turns on its axis. It has a companion star, much fainter than the main blue
star we see from Earth.
eSky © copyright Mark Fisher 1999-2013