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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
SunriseRise: 6:52  
clear_day Transit: 12:11  
SunsetSet: 17:31
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All Constellations » Musca » 

β Muscae (beta Muscae)

Altitude: -73.1°   Azimuth: 188.6°   Direction: South

β Muscae is a double main-sequence star in the constellation of Musca.

β Muscae visual magnitude is 3.05. Because of its moderate brightness, β Muscae should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of β Muscae is -0.039 arcsec per year in Right Ascension and -0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of β Muscae (beta Muscae) star
DSS2 image of β Muscae. The red arrow shows the motion of β Muscae during the next 10000 years (-6.50 arcmin in Right Ascension and -2.83 arcmin in declination);

Key facts about β Muscae


β Muscae (beta Muscae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -73.1°
Azimuth: 188.6°
Direction: South

Celestial coordinates and finder chart of β Muscae

β 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 β Muscae are provided in the following table:

12h 46m 16s
-68° 06’ 29”

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

Finder chart β Muscae (beta Muscae) star
Simplified finder chart for β Muscae (beta Muscae).

Visibility of β Muscae from your location

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

β Muscae (beta Muscae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of β Muscae from the Sun and relative movement

β Muscae is distant 311.07 light years from the Sun and it is moving far from the Sun at the speed of 42 kilometers per second.

95.42 pc
311.07 ly
42 km/s
-0.039 arcsec/year
-0.017 arcsec/year

Spectral properties of β Muscae

β Muscae belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.


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

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

β Muscae star system properties

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

1.3 arcsec

Alternative designations of β Muscae

β Muscae
(beta Muscae)