Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:45  
clear_day Transit: 12:57  
SunsetSet: 21:10 south
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All Constellations » Gemini » 

Mebsuta - ε Geminorum (epsilon Geminorum)

Altitude: -1.2°   Azimuth: 44.9°   Direction: North-East

Mebsuta, also designated as ε Geminorum (epsilon Geminorum), is a variable and double supergiant star in the constellation of Gemini.

Mebsuta visual magnitude is 2.98. Thanks to its high brightness, Mebsuta 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 Mebsuta:


Mebsuta - ε Geminorum (epsilon Geminorum) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.2°
Azimuth: 44.9°
Direction: North-East

Celestial coordinates and finder chart of Mebsuta

Mebsuta 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 Mebsuta are provided in the following table:

06h 43m 55s
+25° 07’ 51”

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

Finder chart Mebsuta - ε Geminorum (epsilon Geminorum) star
Simplified finder chart for Mebsuta - ε Geminorum (epsilon Geminorum).

Visibility of Mebsuta 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 Mebsuta - ε Geminorum (epsilon Geminorum) 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: 64.9°
Max altitude: 63.7°
Azimuth: 295.1°
Mebsuta - ε Geminorum (epsilon Geminorum) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Mebsuta

The image below is a photograph of Mebsuta 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 Mebsuta is -0.006 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 Mebsuta - ε Geminorum (epsilon Geminorum) star
DSS2 image of Mebsuta. The red arrow shows the motion of Mebsuta during the next 10000 years (-1.00 arcmin in Right Ascension and -2.17 arcmin in declination);

Distance of Mebsuta from the Sun and relative movement

Mebsuta is distant 903.05 light years from the Sun and it is moving far from the Sun at the speed of 10 kilometers per second.

277.01 pc
903.05 ly
10 km/s
-0.006 arcsec/year
-0.013 arcsec/year

Spectral properties of Mebsuta

Mebsuta belongs to spectral class G8 and has a luminosity class of I corresponding to a supergiant star.


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

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

Mebsuta star system properties

Mebsuta 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 Mebsuta double sysyem:

110.3 arcsec

Alternative designations of Mebsuta

ε Geminorum
(epsilon Geminorum)
27 Geminorum