Star profile
Theta Geminorum
What is Theta Geminorum
Theta Geminorum is an A3 blue-white giant 189 light-years away, set apart from Castor and Pollux yet aligned with them in the classical drawing of the Twins. To the eye she looks solitary, though catalogs ring her with five faint visual companions, all too dim to disturb her main light. She is the steady glow on which the silence of the constellation rests.
Where it is and when to see it
Theta 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.
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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
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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 Geminorum
- Constellation
- Gemini
- Apparent magnitude
- 3.60
- Distance
- 189.1 light years
- Coordinates (J2000)
- RA 103.197° · Dec 33.961°
- Catalogue
- HIP 33018 · HD 50019
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
- WasatDelta Geminorum3.50
- Kappa Geminorum3.57
- Lambda Geminorum3.58
- Iota Geminorum3.78
- MekbudaZeta Geminorum4.01