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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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Gemini » 

9 Geminorum

Altitude: 42.0°   Azimuth: 254.8°   Direction: West-South-West

9 Geminorum is a supergiant star in the constellation of Gemini.

9 Geminorum visual magnitude is 6.25. Because of its reltive faintness, 9 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 9 Geminorum:


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

Altitude: 42.0°
Azimuth: 254.8°
Direction: West-South-West

Celestial coordinates and finder chart of 9 Geminorum

9 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 9 Geminorum are provided in the following table:

06h 16m 58s
+23° 44’ 26”

The simplified sky map below shows the position of 9 Geminorum in the sky:

Finder chart 9 Geminorum star
Simplified finder chart for 9 Geminorum.

Visibility of 9 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 9 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: 66.3°
Max altitude: 62.3°
Azimuth: 293.7°

Digitized Sky Survey image of 9 Geminorum

The image below is a photograph of 9 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 9 Geminorum is 0 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 9 Geminorum star
DSS2 image of 9 Geminorum. The red arrow shows the motion of 9 Geminorum during the next 100000 years (0.00 arcmin in Right Ascension and -1.67 arcmin in declination);

Distance of 9 Geminorum from the Sun and relative movement

9 Geminorum is distant 2,089.74 light years from the Sun and it is moving far from the Sun at the speed of 13 kilometers per second.

641.03 pc
2,089.74 ly
13 km/s
-0.001 arcsec/year

Spectral properties of 9 Geminorum

9 Geminorum belongs to spectral class B3 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where 9 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 9 Geminorum. Attribution: Richard Powell / CC BY-SA

Alternative designations of 9 Geminorum

9 Geminorum