81 Geminorum is a giant star in the constellation of Gemini.
81 Geminorum visual magnitude is 4.88. Because of its moderate brightness, 81 Geminorum should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about 81 Geminorum:
Celestial coordinates and finder chart of 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:
The simplified sky map below shows the position of 81 Geminorum in the sky:
Visibility of 81 Geminorum from your location
Digitized Sky Survey image of 81 Geminorum
The image below is a photograph of 81 Geminorum from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 81 Geminorum is -0.076 arcsec per year in Right Ascension and -0.058 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
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.
Spectral properties of 81 Geminorum
81 Geminorum belongs to spectral class K4 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.