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Star profile

81 Geminorum

3D likeness based on its real data · class K · ~4,200 K

What is 81 Geminorum

81 Geminorum is a K-type orange giant glowing about 339 light-years away, set within the bodies of the celestial twins Castor and Pollux. It belongs to the generation of stars that have left stable youth behind and swollen as their core hydrogen ran out. In the classical outline of Gemini it holds a quiet position, well off the two main beacons but steady in its own corner.

Where it is and when to see it

81 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.

Find it on the sky map

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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

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.

Write my signature

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 81 Geminorum

Constellation
Gemini
Apparent magnitude
4.89
Distance
339.4 light years
Coordinates (J2000)
RA 116.531° · Dec 18.510°
Catalogue
HIP 37908 · HD 62721

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.

See all 74 stars in Gemini