81 Geminorum

Below the horizon. Rise: 7:07 | Tran: 14:43 | Set: 22:20

Alt: -10.12° Az: 317.76° Direction: South-South-West

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.

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);

Celestial Coordinates

Apparent

Right Ascension 07h 47m 35s

Declination +18° 26’ 46”

Hour Angle 09h 03m 02s

Sidereal Time 16h 50m 38s

J2000

Right Ascension 07h 46m 07s

Declination +18° 30’ 36”

Galactic Coordinates

Galactic Longitude 201.86°

Galactic Latitude 20.14°

Finder Chart

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Finder chart for 81 Geminorum.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.88

Class Giant

Absolute magnitude -0.22

Spectral Type K4III

Color Index (B-V) 1.45

Temperature 3870K

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

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

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 104.71

Distance (light year) 341.36

Radial Speed 81 km/s

Proper Motion RA -0.076 arcsec/y

Proper Motion Dec -0.058"/y

Alternative Designations

Flamsteed designation 81 Geminorum

Henry Draper Catalogue HD62721

SAO Catalogue SAO97221

Hipparcos Catalogue HIP37908

Durchmusterung Catalogue BD+18 1733

FK5 Catalogue 1200

Visibility from Your Location

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

Azimuth: 71.6° RISE 7:07

Max altitude: 57.0° TRANSIT 14:43

Azimuth: 288.4° SET 22:20

Set Location

Other stars in Gemini