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Almach - γ1 Andromedae (gamma1 Andromedae)

Almach, also designated as γ1 Andromedae (gamma1 Andromedae), is a multiple bright giant star in the constellation of Andromeda.

Almach visual magnitude is 2.26. Thanks to its high brightness, Almach is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Almach:

Color of Almach ⬤

Magnitude of Almach 2.26

Class Bright giant

VISIBILITY RIGHT NOW Almach - γ1 Andromedae (gamma1 Andromedae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 67°.

Celestial coordinates and finder chart of Almach

Almach is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Almach are provided in the following table:

Right Ascension J2000 02h 03m 53s

Declination J2000 +42° 19’ 46”

Galactic Longitude 136.96°

Galactic Latitude -18.56°

Constellation Andromeda

The simplified sky map below shows the position of Almach in the sky:

Finder chart Almach - γ1 Andromedae (gamma1 Andromedae) star

Simplified finder chart for Almach - γ1 Andromedae (gamma1 Andromedae).

Visibility of Almach from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Almach - γ1 Andromedae (gamma1 Andromedae) is circumpolar and transits at 13:41 UTC (altitude: 80.8°)

Digitized Sky Survey image of Almach

The image below is a photograph of Almach from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Almach is 0.045 arcsec per year in Right Ascension and -0.052 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Almach - γ1 Andromedae (gamma1 Andromedae) star

DSS2 image of Almach. The red arrow shows the motion of Almach during the next 10000 years (7.50 arcmin in Right Ascension and -8.67 arcmin in declination);

Distance of Almach from the Sun and relative movement

Almach is distant 354.73 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 108.81 pc

Distance (light year) 354.73 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA 0.045 arcsec/year

Proper Motion Dec -0.052 arcsec/year

Spectral properties of Almach

Almach belongs to spectral class K3 and has a luminosity class of II corresponding to a bright giant star.

Absolute magnitude -2.92

Spectral Type K3II

Color Index (B-V) 1.37

Temperature of Almach 4000K

The red dot in the diagram below shows where Almach is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of Almach. Attribution: Richard Powell / CC BY-SA

Almach star system properties

Almach is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Almach double sysyem:

Main star magnitude 2.26

Secondary star magnitude 5.06

Magnitude difference 2.8

Separation 9.6 arcsec

Alternative designations of Almach

Proper Name Almach

Bayer designation γ1 Andromedae
(gamma1 Andromedae)

Flamsteed designation 57 Andromedae

Henry Draper Catalogue HD12533

SAO Catalogue SAO37734

Hipparcos Catalogue HIP9640

Durchmusterung Catalogue BD+41 395

FK5 Catalogue 73

Aitken Double Star Catalogue ADS1630

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