We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
All Constellations » Hercules » 

Cujam - ω Herculis (omega Herculis)

Altitude: 13.3°   Azimuth: 84.1°   Direction: East

Cujam, also designated as ω Herculis (omega Herculis), is a variable and multiple star in the constellation of Hercules.

Cujam visual magnitude is 4.57. Because of its moderate brightness, Cujam should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Cujam:


Cujam - ω Herculis (omega Herculis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.3°
Azimuth: 84.1°
Direction: East

Celestial coordinates and finder chart of Cujam

Cujam 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 Cujam are provided in the following table:

16h 25m 24s
+14° 01’ 59”

The simplified sky map below shows the position of Cujam in the sky:

Finder chart Cujam - ω Herculis (omega Herculis) star
Simplified finder chart for Cujam - ω Herculis (omega Herculis).

Visibility of Cujam 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 Cujam - ω Herculis (omega Herculis) 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: 76.0°
Max altitude: 52.6°
Azimuth: 284.0°

Digitized Sky Survey image of Cujam

The image below is a photograph of Cujam 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 Cujam is 0.044 arcsec per year in Right Ascension and -0.059 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Cujam - ω Herculis (omega Herculis) star
DSS2 image of Cujam. The red arrow shows the motion of Cujam during the next 10000 years (7.33 arcmin in Right Ascension and -9.83 arcmin in declination);

Distance of Cujam from the Sun and relative movement

Cujam is distant 235.04 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

72.10 pc
235.04 ly
-6 km/s
0.044 arcsec/year
-0.059 arcsec/year

Spectral properties of Cujam

Cujam belongs to spectral class B9 Cujam is also a Cr chemically peculiar star.


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

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

Cujam star system properties

Cujam 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 Cujam double sysyem:

28.4 arcsec

Alternative designations of Cujam

ω Herculis
(omega Herculis)
24 Herculis