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Almach

Alamak, Almaac, Almaak, Gamma^1,2 Andromedae, 57 Andromedae

Orange Star in Andromeda

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Proper Names	Almach, Alamak, Almaac, Almaak
Bayer Designation	Gamma^1,2 Andromedae, Gamma Andromedae A, B, C
Flamsteed Number	57 Andromedae A, B, C
HR (BSC)	603 (A), 604 (B, C)
HD	12523 (A), 12534 (B, C)
Constellation	Andromeda
Right Ascension	2h 3m 54s
Declination	+42° 19' 47"
Distance	355 light years 109 parsecs
Magnitude	Apparent: +2.2 (A), +4.8 (B) Absolute: -3.2 (A), -0.6 (B)
Spectral Class	K3IIb orange bright giant (A), A0V white main sequence star (B), B8V blue main sequence star (C)
Optimum Visibility	November
Notes	Almach is a complex multiple system. Almach A is an orange giant, which rotates around a common centre of gravity with a triple system consisting of the Almach B (itself a binary system) and a blue star designated Almach C.

Imagery provided by Aladin sky atlas

In the east of Andromeda, towards the hero Perseus, is one of the sky's most famous multiple systems. Two close bright stars, one blue and one yellow-orange, converged with one another to meet in 2012, and are now separating again. Meanwhile, a third component circles these two along a decades-long orbit.

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