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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:55  
clear_day Transit: 12:11  
SunsetSet: 17:29
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All Constellations » Musca » 

η Muscae (eta Muscae)

Altitude: -49.4°   Azimuth: 214.9°   Direction: South-West

η Muscae is a variable and double main-sequence star in the constellation of Musca.

η Muscae visual magnitude is 4.8. Because of its moderate brightness, η 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 η Muscae is -0.041 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of η Muscae (eta Muscae) star
DSS2 image of η Muscae. The red arrow shows the motion of η Muscae during the next 10000 years (-6.83 arcmin in Right Ascension and -1.33 arcmin in declination);

Key facts about η Muscae


η Muscae (eta Muscae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -49.4°
Azimuth: 214.9°
Direction: South-West

Celestial coordinates and finder chart of η Muscae

η 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 η Muscae are provided in the following table:

13h 15m 14s
-67° 53’ 39”

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

Finder chart η Muscae (eta Muscae) star
Simplified finder chart for η Muscae (eta Muscae).

Visibility of η Muscae from your location

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

η Muscae (eta Muscae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of η Muscae from the Sun and relative movement

η Muscae is distant 405.47 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

124.38 pc
405.47 ly
-8 km/s
-0.041 arcsec/year
-0.008 arcsec/year

Spectral properties of η Muscae

η Muscae belongs to spectral class B8 and has a luminosity class of V corresponding to a main-sequence star.


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

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

η Muscae star system properties

η Muscae is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the η Muscae double sysyem:

60 arcsec

Alternative designations of η Muscae

η Muscae
(eta Muscae)