1 Geminorum

Above the horizon. Rise: 7:35 | Tran: 15:43 | Set: 23:51

Alt: 61.11° Az: 195.34° Direction: South-South-West

1 Geminorum is a variable and multiple giant star of spectral class G7 in the constellation of Gemini.

1 Geminorum visual magnitude is 4.16. Because of its moderate brightness, 1 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 1 Geminorum. The red arrow shows the motion of 1 Geminorum during the next 1000 years (-0.13 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 06h 05m 39s

Declination +23° 15’ 37”

Hour Angle 00h 31m 59s

Sidereal Time 06h 37m 38s

J2000

Right Ascension 06h 04m 07s

Declination +23° 15’ 47”

Galactic Coordinates

Galactic Longitude 186.99°

Galactic Latitude 0.72°

Finder Chart

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Finder chart for 1 Geminorum.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.16

Class Giant

Absolute magnitude 0.84

Spectral Type G7III

Color Index (B-V) 0.82

Temperature 5221K

The red dot in the diagram below shows where 1 Geminorum is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 1 Geminorum. Attribution: Richard Powell / CC BY-SA

Star System Properties

1 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 1 Geminorum double sysyem:

Main star magnitude 4.16

Secondary star magnitude 4.56

Magnitude difference 0.4

Separation 0.2 arcsec

Distance, Radial Speed, Proper Motion

1 Geminorum is distant 150.65 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

Distance (parsec) 46.21

Distance (light year) 150.65

Radial Speed 20 km/s

Proper Motion RA -0.008 arcsec/y

Proper Motion Dec -0.1"/y

Alternative Designations

Flamsteed designation 1 Geminorum

Henry Draper Catalogue HD41116

SAO Catalogue SAO77915

Hipparcos Catalogue HIP28734

Durchmusterung Catalogue BD+23 1170

FK5 Catalogue 1163

General Catalogue of Variable Stars Var?

Visibility from Your Location

Today's 1 Geminorum rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 66.7° RISE 7:35

Max altitude: 61.8° TRANSIT 15:43

Azimuth: 293.3° SET 23:51

Set Location

Other stars in Gemini