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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Andromeda » 

Mirach - β Andromedae (beta Andromedae)

Altitude: 62.4°   Azimuth: 247.4°   Direction: West-South-West

Mirach, also designated as β Andromedae (beta Andromedae), is a variable and multiple hypergiant star in the constellation of Andromeda.

Mirach visual magnitude is 2.06, making it the 56th brightest star in the sky. Thanks to its high brightness, Mirach 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 Mirach:


Mirach - β Andromedae (beta Andromedae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 62.4°
Azimuth: 247.4°
Direction: West-South-West

Celestial coordinates and finder chart of Mirach

Mirach 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 Mirach are provided in the following table:

01h 09m 43s
+35° 37’ 14”

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

Finder chart Mirach - β Andromedae (beta Andromedae) star
Simplified finder chart for Mirach - β Andromedae (beta Andromedae).

Visibility of Mirach from your location

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

Today's Mirach - β Andromedae (beta Andromedae) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 54.4°
Max altitude: 74.1°
Azimuth: 305.6°

Digitized Sky Survey image of Mirach

The image below is a photograph of Mirach 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 Mirach is 0.178 arcsec per year in Right Ascension and -0.114 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Mirach - β Andromedae (beta Andromedae) star
DSS2 image of Mirach. The red arrow shows the motion of Mirach during the next 1000 years (2.97 arcmin in Right Ascension and -1.90 arcmin in declination);

Distance of Mirach from the Sun and relative movement

Mirach is distant 199.27 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

61.12 pc
199.27 ly
3 km/s
0.178 arcsec/year
-0.114 arcsec/year

Spectral properties of Mirach

Mirach belongs to spectral class M0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

Mirach star system properties

Mirach is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Mirach double sysyem:

80.4 arcsec

Alternative designations of Mirach

β Andromedae
(beta Andromedae)
43 Andromedae