Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
warning Set your observing location to get relevant data
Search  close
All Constellations » Gemini » 

α Geminorum (alpha Geminorum)

Below the horizon.  Rise: 7:08 | Tran: 16:30 | Set: 1:56
Alt: -1.37°   Az: 28.70°   Direction: North-North-East

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.

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);

Celestial Coordinates

Apparent

07h 36m 13s
+31° 49’ 53”
14h 17m 38s
21h 53m 52s

J2000

07h 34m 36s
+31° 53’ 18”

Galactic Coordinates

187.44°
22.48°

Finder Chart

loader
  Loading map...
Finder chart for α Geminorum (alpha Geminorum).

Magnitude, Color, Spectral Class

2.88
Main-sequence

1.89
A2V
9652K

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

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:

2.88
3.78
0.9
2 arcsec

Distance, Radial Speed, Proper Motion

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
51.53
-1 km/s
-0.172 arcsec/y
-0.099"/y

Alternative Designations

α Geminorum
(alpha Geminorum)
66 Geminorum
SAO60198
SAO60198
Gl 278 B

Visibility 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: 58.2°
Max altitude: 70.4°
Azimuth: 301.8°