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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:58 
Transit: 12:56 
Sunset: 20:55
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All Constellations » Gemini » 

τ Geminorum (tau Geminorum)

Above the horizon.  Rise: 7:01 | Tran: 16:06 | Set: 1:15
Alt: 55.81°   Az: 114.32°   Direction: East-South-East

τ Geminorum is a variable and multiple giant star of spectral class K2 in the constellation of Gemini.

τ Geminorum visual magnitude is 4.41. Because of its moderate brightness, τ Geminorum is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of τ Geminorum (tau Geminorum) star
DSS2 image of τ Geminorum. The red arrow shows the motion of τ Geminorum during the next 10000 years (-5.00 arcmin in Right Ascension and -7.50 arcmin in declination);

Celestial Coordinates

Apparent

07h 12m 45s
+30° 12’ 05”
21h 34m 40s
04h 47m 25s

J2000

07h 11m 08s
+30° 14’ 43”

Galactic Coordinates

187.22°
17.2°

Finder Chart

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Finder chart for τ Geminorum (tau Geminorum).

Magnitude, Color, Spectral Class

4.41
Giant

-0.42
K2III
4194K

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

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

Star System Properties

τ 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 τ Geminorum double sysyem:

4.41
10.91
6.5
1.9 arcsec

Distance, Radial Speed, Proper Motion

τ Geminorum is distant 301.57 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

92.51
301.57
22 km/s
-0.03 arcsec/y
-0.045"/y

Alternative Designations

τ Geminorum
(tau Geminorum)
46 Geminorum
SAO59858
SAO59858

Visibility from Your Location

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

Azimuth: 59.8°
Max altitude: 68.7°
Azimuth: 300.2°