
Star profile
Cujam
Omega Herculis · Hercules
Variable starWhat is Cujam
Cujam is a hot B-type star in the constellation of Hercules, lying 250 light-years away, slightly variable. Its name derives from the medieval Latin «cuiacum», a kind of sword or short weapon attributed to the hero in Renaissance astronomical engravings. Hercules occupies a vast stretch of the northern sky kneeling and exhausted after his twelve labours — according to the oldest reading of the figure, predating even the Greco-Latin tradition that turned it into heroic glory.
Where it is and when to see it
Cujam lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is May: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.
It opens in your browser. Free, no account, nothing to install.
The signature wall
Stelvia's sky works like a signature wall: anyone can leave their name and a message on a real star, and that signature goes up on the map for everyone to read. Signing is free.
A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works
If you don't have an account yet, we'll ask for an email to confirm it's you: we send you a link and that's it, no password.
A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.
Astronomical data for Cujam
- Constellation
- Hercules
- Apparent magnitude
- 4.57
- Distance
- 250.2 light years
- Coordinates (J2000)
- RA 246.354° · Dec 14.033°
- Catalogue
- HIP 80463 · HD 148112
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Hercules
Hercules has 136 stars in Stelvia's catalogue. Here are a few of them.
- KornephorosBeta Herculis2.78
- RasalgethiAlpha 1 Herculis2.78
- Zeta Herculis2.81
- 102 Herculis4.37
- MaasymLambda Herculis4.41
- Nu Herculis4.41
- 113 Herculis4.57
- Chi Herculis4.60