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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: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Gemini » 

25 Geminorum

Altitude: 2.3°   Azimuth: 44.8°   Direction: North-East

25 Geminorum is a multiple supergiant star in the constellation of Gemini.

25 Geminorum visual magnitude is 6.42. Because of its reltive faintness, 25 Geminorum should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 25 Geminorum:


25 Geminorum is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 2.3°
Azimuth: 44.8°
Direction: North-East

Celestial coordinates and finder chart of 25 Geminorum

25 Geminorum 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 25 Geminorum are provided in the following table:

06h 41m 21s
+28° 11’ 47”

The simplified sky map below shows the position of 25 Geminorum in the sky:

Finder chart 25 Geminorum star
Simplified finder chart for 25 Geminorum.

Visibility of 25 Geminorum 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 25 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: 61.8°
Max altitude: 66.7°
Azimuth: 298.2°

Digitized Sky Survey image of 25 Geminorum

The image below is a photograph of 25 Geminorum 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 25 Geminorum is 0.008 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 25 Geminorum star
DSS2 image of 25 Geminorum. The red arrow shows the motion of 25 Geminorum during the next 100000 years (13.33 arcmin in Right Ascension and -15.00 arcmin in declination);

Distance of 25 Geminorum from the Sun and relative movement

25 Geminorum is distant 1,411.26 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

432.90 pc
1,411.26 ly
-6 km/s
0.008 arcsec/year
-0.009 arcsec/year

Spectral properties of 25 Geminorum

25 Geminorum belongs to spectral class G5 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where 25 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 25 Geminorum. Attribution: Richard Powell / CC BY-SA

25 Geminorum star system properties

25 Geminorum is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 25 Geminorum double sysyem:

55.9 arcsec

Alternative designations of 25 Geminorum

25 Geminorum