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public LocationGreenwich, UK
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?
All Constellations » Gemini » 

Propus - η Geminorum (eta Geminorum)

Above the horizon.  Rise: 4:55 | Tran: 12:58 | Set: 21:01
Altitude: 46.4°   Azimuth: 115.3°   Direction: East-South-East

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.

Celestial coordinates and finder chart of Propus

Finder chart Propus - η Geminorum (eta Geminorum) star
Simplified finder chart for Propus - η Geminorum (eta Geminorum).

Propus 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 Propus are provided in the following table:

06h 14m 52s
+22° 30’ 24”
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);

Key facts about Propus


and has a luminosity class of III corresponding to a giant star.


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

Propus 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:

0 arcsec

Distance of Propus from the Sun and relative movement

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 pc
349.04 ly
19 km/s
-0.068 arcsec/year
-0.012 arcsec/year

Alternative designations of Propus

η Geminorum
(eta Geminorum)
7 Geminorum

Visibility of Propus 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°