Star profile
Theta Cassiopeiae
What is Theta Cassiopeiae
Theta Cassiopeiae is a white type A star pulsing about 134 light-years away, within the unmistakable W of the mythological queen. Its clean glow serves as a landmark for amateur astronomers learning to find their way around the polar sky: from Cassiopeia one navigates onward to Andromeda and Perseus. It belongs to the northern backdrop that never sets for European observers.
Where it is and when to see it
Theta Cassiopeiae lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is November: 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 Theta Cassiopeiae
- Constellation
- Cassiopeia
- Apparent magnitude
- 4.34
- Distance
- 133.6 light years
- Coordinates (J2000)
- RA 17.775° · Dec 55.150°
- Catalogue
- HIP 5542 · HD 6961
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Cassiopeia
Cassiopeia has 93 stars in Stelvia's catalogue. Here are a few of them.
- CihGamma Cassiopeiae2.15
- SchedarAlpha Cassiopeiae2.24
- CaphBeta Cassiopeiae2.28
- FuluZeta Cassiopeiae3.69
- 50 Cassiopeiae3.95
- Kappa Cassiopeiae4.17
- Iota Cassiopeiae4.46
- Omicron Cassiopeiae4.48