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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 13:00 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

81 Geminorum

Below the horizon.  Rise: 7:16 | Tran: 14:52 | Set: 22:29
Altitude: -14.3°   Azimuth: 32.3°   Direction: North-North-East

81 Geminorum is a giant star of spectral class K4 in the constellation of Gemini.

81 Geminorum visual magnitude is 4.88. Because of its moderate brightness, 81 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.

Celestial coordinates and finder chart of 81 Geminorum

Finder chart 81 Geminorum star
Simplified finder chart for 81 Geminorum.

81 Geminorum is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 81 Geminorum are provided in the following table:

07h 46m 07s
+18° 30’ 36”
Image of 81 Geminorum star
DSS2 image of 81 Geminorum. The red arrow shows the motion of 81 Geminorum during the next 10000 years (-12.67 arcmin in Right Ascension and -9.67 arcmin in declination);

Key facts about 81 Geminorum


and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 81 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 81 Geminorum. Attribution: Richard Powell / CC BY-SA

Distance of 81 Geminorum from the Sun and relative movement

81 Geminorum is distant 341.36 light years from the Sun and it is moving far from the Sun at the speed of 81 kilometers per second.

104.71 pc
341.36 ly
81 km/s
-0.076 arcsec/year
-0.058 arcsec/year

Alternative designations of 81 Geminorum

81 Geminorum

Visibility of 81 Geminorum from your location

Today's 81 Geminorum rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 71.5°
Max altitude: 57.0°
Azimuth: 288.5°