Астрогалактика

☆ binary Alpheratz⁵³ (Alpha Andromedae А, α And А, 21 Andromedae, HD 358, Delta Pegasi) → B8IV-VHgMn (blue-white) → variable ACV (α² CVn) type → 2.07 ± 0.010m. → d⊕ 97 ± 1 ly → Great Square of Pegasus asterism → Andromeda _1.jpg