Gamma Andromedae

γ Andromedae A: γ1 Andromedae • HD 12533 ​​• SAO • TYC 2837-2311-1 37734 γ Andromedae BC: γ2 Andromedae OΣ • 38 • HD 12533 ​​• SAO • TYC 2837-2311-2 37735

Alamak or almaak, name by Bayer γ Andromedae (Gamma Andromedae, short- γ And), is about 355 light years distant star system in the constellation Andromeda.

Even in relatively small telescopes Alamak can be resolved into a binary star, with an eight- inch model also in the daytime. The two components with the designations of γ1 and γ2 Andromedae Andromedae currently have an angular distance of 9 ", 6, and a position angle of 63 °.

The main star γ1 Andromedae (or γ And A ) is a red supergiant of spectral type K3, its Apparent magnitude is 2.3 mag.

When γ2 Andromedae is a triple system with a total brightness of 4.8 mag. It consists of the two, less than a second of arc apart, components B and C, where B is again a spectroscopic binary with an orbital period of 2.67 days, which consists of two blue-white main sequence stars of spectral type B. γ Andromedae C is a main-sequence stars of spectral type A0. The components B and C orbit each other in about 64 years, the section has a semi-major axis of 0 " 30.

Alternative spellings for Alamak or almaak are Almach, Almaach and Almak. The star is part of the bright five-star series ( Perseus - Andromeda - Pegasus ), which can be seen on the northern hemisphere most of the year.