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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:09 
Transit: 12:56 
Sunset: 20:44
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All Constellations » Gemini » 

Propus - η Geminorum (eta Geminorum)

Below the horizon.  Rise: 7:39 | Tran: 15:42 | Set: 23:44
Alt: -1.52°   Az: 310.39°   Direction: North-West

Propus, also designated as η Geminorum (eta Geminorum), is a variable and multiple giant star of spectral class M3 in the constellation of Gemini.

Propus visual magnitude is 3.28. Because of its moderate brightness, Propus 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.

Image of Propus - η Geminorum (eta Geminorum) star
DSS2 image of Propus. The red arrow shows the motion of Propus during the next 10000 years (-11.33 arcmin in Right Ascension and -2.00 arcmin in declination);

Celestial Coordinates

Apparent

06h 16m 24s
+22° 29’ 49”
08h 18m 02s
14h 34m 26s

J2000

06h 14m 52s
+22° 30’ 24”

Galactic Coordinates

188.85°
2.52°

Finder Chart

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Finder chart for Propus - η Geminorum (eta Geminorum).

Magnitude, Color, Spectral Class

3.28
Giant

-1.87
M3III
3649K

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

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

Star System Properties

Propus 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 Propus double sysyem:

3.28
5.28
2
0 arcsec

Distance, Radial Speed, Proper Motion

Propus is distant 349.04 light years from the Sun and it is moving far from the Sun at the speed of 19 kilometers per second.

107.07
349.04
19 km/s
-0.068 arcsec/y
-0.012"/y

Alternative Designations

Propus
η Geminorum
(eta Geminorum)
7 Geminorum
SAO78135
SAO78135

Visibility from Your Location

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

Azimuth: 67.5°
Max altitude: 61.0°
Azimuth: 292.5°