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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:19 
Transit: 12:14 
Sunset: 17:09
wb_twilight   (Nautical Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Gemini » 

40 Geminorum

Below the horizon.  Rise: 13:00 | Tran: 21:28 | Set: 5:59
Alt: -4.44°   Az: 323.18°   Direction: North-West

40 Geminorum is a giant star of spectral class B8 in the constellation of Gemini.

40 Geminorum visual magnitude is 6.4. Because of its faintness, 40 Geminorum is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 40 Geminorum star
DSS2 image of 40 Geminorum. The red arrow shows the motion of 40 Geminorum during the next 10000 years (-1.83 arcmin in Right Ascension and -1.33 arcmin in declination);

Celestial Coordinates

Apparent

07h 01m 00s
+25° 52’ 40”
09h 13m 33s
16h 14m 34s

J2000

06h 59m 27s
+25° 54’ 51”

Galactic Coordinates

190.31°
13.14°

Finder Chart

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Finder chart for 40 Geminorum.

Magnitude, Color, Spectral Class

6.4
Giant

-1.43
B8III
11744K

The red dot in the diagram below shows where 40 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 40 Geminorum. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

40 Geminorum is distant 1,198.53 light years from the Sun and it is moving far from the Sun at the speed of 12 kilometers per second.

367.65
1,198.53
12 km/s
-0.011 arcsec/y
-0.008"/y

Alternative Designations

40 Geminorum
SAO78947
SAO78947

Visibility from Your Location

Today's 40 Geminorum rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 64.1°
Max altitude: 64.4°
Azimuth: 295.9°