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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:54  
clear_day Transit: 12:49  
SunsetSet: 18:43 south
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All Constellations » Gemini » 

39 Geminorum

Altitude: 60.3°   Azimuth: 219.1°   Direction: South-West

39 Geminorum is a double main-sequence star in the constellation of Gemini.

39 Geminorum visual magnitude is 6.1. Because of its reltive faintness, 39 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 39 Geminorum:


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

Altitude: 60.3°
Azimuth: 219.1°
Direction: South-West

Celestial coordinates and finder chart of 39 Geminorum

39 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 39 Geminorum are provided in the following table:

06h 58m 47s
+26° 04’ 51”

The simplified sky map below shows the position of 39 Geminorum in the sky:

Finder chart 39 Geminorum star
Simplified finder chart for 39 Geminorum.

Visibility of 39 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 39 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: 63.9°
Max altitude: 64.6°
Azimuth: 296.1°

Digitized Sky Survey image of 39 Geminorum

The image below is a photograph of 39 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 39 Geminorum is -0.168 arcsec per year in Right Ascension and 0.093 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 39 Geminorum star
DSS2 image of 39 Geminorum. The red arrow shows the motion of 39 Geminorum during the next 1000 years (-2.80 arcmin in Right Ascension and 1.55 arcmin in declination);

Distance of 39 Geminorum from the Sun and relative movement

39 Geminorum is distant 154.50 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

47.39 pc
154.50 ly
6 km/s
-0.168 arcsec/year
0.093 arcsec/year

Spectral properties of 39 Geminorum

39 Geminorum belongs to spectral class F7 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 39 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 39 Geminorum. Attribution: Richard Powell / CC BY-SA

39 Geminorum star system properties

39 Geminorum 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 39 Geminorum double sysyem:

28.8 arcsec

Alternative designations of 39 Geminorum

39 Geminorum