Star
Alpheratz
Blue-white star · B9p
α Andromedae · Andromeda
Shown in its true colour — like most stars, it is too far away to photograph as more than a point of light.
Alpheratz is a prominent star system in the constellation of Andromeda. Pronounced, it has the Bayer designation Alpha Andromedae, Latinised from α Andromedae, and abbreviated Alpha And or α And, respectively. Alpheratz is the brightest star in the constellation when Mirach undergoes its periodical dimming. Immediately northeast of the constellation of Pegasus, it is the upper left star of the Great Square of Pegasus. It is located at a distance of 97 light-years from Earth.
Description from Wikipedia (CC BY-SA 4.0).
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Key facts
Distance
~97 light-years
Apparent mag.
+2.07
Spectral type
B9p
Luminosity
114 × Sun
Absolute mag.
−0.30
Catalogue
HIP 677
Spectral type
B9p
True colour from its B–V index (-0.04): a surface around 10700 K.
Did you know
- Alpheratz is also known as α Andromedae.
- Its spectral type B9p marks it as a blue-white star.
- It lies in the constellation Andromeda.
