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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
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
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All Constellations » Gemini » 

υ Geminorum (upsilon Geminorum)

Altitude: 39.0°   Azimuth: 265.2°   Direction: West

υ Geminorum is a variable and double hypergiant star in the constellation of Gemini.

υ Geminorum visual magnitude is 4.06. Because of its moderate brightness, υ Geminorum should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of υ Geminorum is -0.034 arcsec per year in Right Ascension and -0.106 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of υ Geminorum (upsilon Geminorum) star
DSS2 image of υ Geminorum. The red arrow shows the motion of υ Geminorum during the next 1000 years (-0.57 arcmin in Right Ascension and -1.77 arcmin in declination);

Key facts about υ Geminorum


υ Geminorum (upsilon Geminorum) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 39.0°
Azimuth: 265.2°
Direction: West

Celestial coordinates and finder chart of υ Geminorum

υ 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 υ Geminorum are provided in the following table:

07h 35m 55s
+26° 53’ 44”

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

Finder chart υ Geminorum (upsilon Geminorum) star
Simplified finder chart for υ Geminorum (upsilon Geminorum).

Visibility of υ 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 υ Geminorum (upsilon 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: 63.1°
Max altitude: 65.4°
Azimuth: 296.9°

Distance of υ Geminorum from the Sun and relative movement

υ Geminorum is distant 240.24 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

73.69 pc
240.24 ly
-21 km/s
-0.034 arcsec/year
-0.106 arcsec/year

Spectral properties of υ Geminorum

υ Geminorum belongs to spectral class M0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

υ Geminorum star system properties

υ 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 υ Geminorum double sysyem:

46.1 arcsec

Alternative designations of υ Geminorum

υ Geminorum
(upsilon Geminorum)
69 Geminorum