Gamma Andromedae

Also known as 57 Andromedae, 57 And, γ And, γ Andromedae, Almach

multiple star system in the constellation Andromeda

Key facts

Constellation: Andromeda
Right ascension: 02 03 53.95229
Declination: +42 ° 19 ′ 47.0223 ″
Spectral type: K2+IIb
U b color index: +1.58
B v color index: +1.37
R i color index: +0.68

via Wikipedia infobox

Wikidata facts

Constellation: Andromeda
Radius: 80
Image: Almach double star.jpg

Show 12 more facts

declination component of proper motion: -50.85
right ascension component of proper motion: 43.08
declination: 42.329728424
right ascension: 30.974801207
parallax: 8.30
radial velocity: -11.50
apparent magnitude: 2.10
catalog code: γ And
epoch: J2000.0
spectral class: K3II+B9.5V+A0V
luminosity: 2.000
absolute magnitude: -2.9

Sources (3)

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Encyclopedic overview

Gamma Andromedae is a multiple star system in the northern constellation of Andromeda. It is the third-brightest star in the constellation, after Alpheratz and Mirach. Its identifier is a Bayer designation that is Latinized from γ Andromedae, and is abbreviated Gam And or γ And, respectively. The system has the proper name Almach, pronounced /ˈælmæk/. Based on parallax measurements, it is estimated to be about 390 light-years distant. The system is drifting closer to the Sun with a radial velocity of −11.7 km/s.

Observation

Excerpted from Wikipedia’s “Gamma Andromedae” article, available under the CC BY-SA 4.0 licence.