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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:41  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sleep NighttimeWhat's Visible Now?
All Constellations » Gemini » 

28 Geminorum

Altitude: 57.6°   Azimuth: 238.2°   Direction: West-South-West

28 Geminorum is a variable giant star in the constellation of Gemini.

28 Geminorum visual magnitude is 5.44. Because of its reltive faintness, 28 Geminorum should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 28 Geminorum:


28 Geminorum is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 57.6°
Azimuth: 238.2°
Direction: West-South-West

Celestial coordinates and finder chart of 28 Geminorum

28 Geminorum is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 28 Geminorum are provided in the following table:

06h 44m 45s
+28° 58’ 14”

The simplified sky map below shows the position of 28 Geminorum in the sky:

Finder chart 28 Geminorum star
Simplified finder chart for 28 Geminorum.

Visibility of 28 Geminorum from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 28 Geminorum rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.0°
Max altitude: 67.5°
Azimuth: 299.0°

Digitized Sky Survey image of 28 Geminorum

The image below is a photograph of 28 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 28 Geminorum is -0.004 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 28 Geminorum star
DSS2 image of 28 Geminorum. The red arrow shows the motion of 28 Geminorum during the next 10000 years (-0.67 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of 28 Geminorum from the Sun and relative movement

28 Geminorum is distant 569.93 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

174.83 pc
569.93 ly
16 km/s
-0.004 arcsec/year
-0.026 arcsec/year

Spectral properties of 28 Geminorum

28 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 28 Geminorum is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 28 Geminorum. Attribution: Richard Powell / CC BY-SA

Alternative designations of 28 Geminorum

28 Geminorum