Alpha Andromedae, also known as Alpheratz, Sirrah, Sirah, α And, Alpha And, δ Pegasi, δ Peg, Delta Pegasi, Delta Peg, 21 Andromedae, 21 And, H 5 32A, MKT 11, ADS 94 A, BD+28°4, CCDM J00083+2905A, FK5 1, GC 127, HD 358, HIP 677, HR 15, IDS 00032+2832 A, LTT 10039, NLTT 346, PPM 89441, SAO 73765 and WDS 00084+2905A/Aa, is a binary star system with two Blue subgiant stars located inside The Andromeda Galaxy.
The Primary Star
Primary Alpha Andromedae is 97 Light Years from our Sun. Alpheratz has a mass of 3.8 Solar Masses, a radius of 2.7 Solar Radiuses and a temperature of 13,800 Kelvin. The Luminosity of Alpheratz is 240 Solar Luminosities. Alpheratz has a surface gravity of 3.75 Centimetre-gram-second system of units. Alpheratz is 60 Million Years Old.
The Secondary Star
Secondary Alpha Andromedae is 97 Light Years from our Sun. Sirah has a mass of 1.85 Solar Masses, a radius of 1.65 Solar Radius and a temperature of 8500 Kelvin. The Luminosity of Sirah is 13 Solar Luminosities. Sirah has a surface gravity of 4.0 Centimetre-gram-second system of units. Sitah is 70 Million Years Old.
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