We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
Help keep this site free and ads-free: donate now!
public LocationGreenwich, UK
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

α Geminorum (alpha Geminorum)

Above the horizon.  Rise: 5:15 | Tran: 14:37 | Set: 0:00
Altitude: 22.3°   Azimuth: 293.6°   Direction: West-North-West

α Geminorum is a multiple main-sequence star of spectral class A2 in the constellation of Gemini.

α Geminorum visual magnitude is 2.88. Because of its brightness, α Geminorum is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Celestial coordinates and finder chart of α Geminorum

Finder chart α Geminorum (alpha Geminorum) star
Simplified finder chart for α Geminorum (alpha Geminorum).

α 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 α Geminorum are provided in the following table:

07h 34m 36s
+31° 53’ 18”
Image of α Geminorum (alpha Geminorum) star
DSS2 image of α Geminorum. The red arrow shows the motion of α Geminorum during the next 1000 years (-2.87 arcmin in Right Ascension and -1.65 arcmin in declination);

Key facts about α Geminorum


and has a luminosity class of V corresponding to a main-sequence star.


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

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

α Geminorum star system properties

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

2 arcsec

Distance of α Geminorum from the Sun and relative movement

α Geminorum is distant 51.53 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

15.81 pc
51.53 ly
-1 km/s
-0.172 arcsec/year
-0.099 arcsec/year

Alternative designations of α Geminorum

α Geminorum
(alpha Geminorum)
66 Geminorum
Gl 278 B

Visibility of α Geminorum from your location

Today's α Geminorum (alpha Geminorum) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 58.1°
Max altitude: 70.4°
Azimuth: 301.9°