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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:49  
clear_day Transit: 12:50  
SunsetSet: 18:50 south
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All Constellations » Gemini » 

45 Geminorum

Altitude: -8.4°   Azimuth: 50.9°   Direction: North-East

45 Geminorum is a multiple giant star in the constellation of Gemini.

45 Geminorum visual magnitude is 5.44. Because of its reltive faintness, 45 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 45 Geminorum:


45 Geminorum is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -8.4°
Azimuth: 50.9°
Direction: North-East

Celestial coordinates and finder chart of 45 Geminorum

45 Geminorum is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 45 Geminorum are provided in the following table:

07h 08m 21s
+15° 55’ 50”

The simplified sky map below shows the position of 45 Geminorum in the sky:

Finder chart 45 Geminorum star
Simplified finder chart for 45 Geminorum.

Visibility of 45 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 45 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: 74.1°
Max altitude: 54.5°
Azimuth: 285.9°

Digitized Sky Survey image of 45 Geminorum

The image below is a photograph of 45 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 45 Geminorum is -0.008 arcsec per year in Right Ascension and -0.099 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 45 Geminorum star
DSS2 image of 45 Geminorum. The red arrow shows the motion of 45 Geminorum during the next 1000 years (-0.13 arcmin in Right Ascension and -1.65 arcmin in declination);

Distance of 45 Geminorum from the Sun and relative movement

45 Geminorum is distant 305.24 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

93.63 pc
305.24 ly
-17 km/s
-0.008 arcsec/year
-0.099 arcsec/year

Spectral properties of 45 Geminorum

45 Geminorum belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 45 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 45 Geminorum. Attribution: Richard Powell / CC BY-SA

45 Geminorum star system properties

45 Geminorum is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 45 Geminorum double sysyem:

10.4 arcsec

Alternative designations of 45 Geminorum

45 Geminorum