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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:52  
clear_day Transit: 12:11  
SunsetSet: 17:31
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All Constellations » Musca » 

α Muscae (alpha Muscae)

Altitude: -45.8°   Azimuth: 210.7°   Direction: South-South-West

α Muscae is a variable and double sub-giant star in the constellation of Musca.

α Muscae visual magnitude is 2.69. Thanks to its high brightness, α Muscae is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

The proper motion of α Muscae is -0.048 arcsec per year in Right Ascension and -0.013 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of α Muscae (alpha Muscae) star
DSS2 image of α Muscae. The red arrow shows the motion of α Muscae during the next 10000 years (-8.00 arcmin in Right Ascension and -2.17 arcmin in declination);

Key facts about α Muscae


α Muscae (alpha Muscae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -45.8°
Azimuth: 210.7°
Direction: South-South-West

Celestial coordinates and finder chart of α Muscae

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

12h 37m 10s
-69° 08’ 08”

The simplified sky map below shows the position of α Muscae in the sky:

Finder chart α Muscae (alpha Muscae) star
Simplified finder chart for α Muscae (alpha Muscae).

Visibility of α Muscae from your location

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

α Muscae (alpha Muscae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of α Muscae from the Sun and relative movement

α Muscae is distant 305.53 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

93.72 pc
305.53 ly
13 km/s
-0.048 arcsec/year
-0.013 arcsec/year

Spectral properties of α Muscae

α Muscae belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


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

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

α Muscae star system properties

α Muscae 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 α Muscae double sysyem:

29.6 arcsec

Alternative designations of α Muscae

α Muscae
(alpha Muscae)