Star profile
51 Geminorum
Variable starWhat is 51 Geminorum
51 Geminorum is a variable orange K-type giant kindled some 541 light-years away on the eastern flank of the Twins. Its brightness shifts gently, that slow pulse typical of swollen suns that have left behind the calm burning of hydrogen. The light we see tonight set out deep in the fifteenth century, as Gutenberg's press began to multiply knowledge: five centuries of travel to arrive as an amber heartbeat in our telescopes.
Where it is and when to see it
51 Geminorum lies in the northern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is January: 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 51 Geminorum
- Constellation
- Gemini
- Apparent magnitude
- 5.07
- Distance
- 541.0 light years
- Coordinates (J2000)
- RA 108.343° · Dec 16.159°
- Catalogue
- HIP 34909 · HD 55383
A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.
Other stars in Gemini
Gemini has 74 stars in Stelvia's catalogue. Here are a few of them.
- PolluxBeta Geminorum1.16
- CastorAlpha Geminorum1.58
- AlhenaGamma Geminorum1.93
- 65 Geminorum5.01
- 57 Geminorum5.04
- 74 Geminorum5.04
- 64 Geminorum5.07
- 56 Geminorum5.09