Star profile

Omega Geminorum

Variable star

3D likeness based on its real data · class G · ~5,500 K

What is Omega Geminorum

Omega Geminorum is a rare yellow supergiant, one of the truly large stars in the sky: 72 times the Sun's radius and 1,800 times its luminosity, condensed into a faint spark by its 1,500-light-year remoteness. A low-amplitude variable, it pulses slowly between the twins Castor and Pollux. Brought closer, it would outshine most known stars of the night sky.

Where it is and when to see it

Omega 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, when it culminates around midnight.

From London it culminates about 63° above the horizon.
From New York it culminates about 74° above the horizon.
From Sydney it culminates about 32° above the horizon.

It can be seen from anywhere north of 66° S.

It ranks no. 36 in brightness among the 74 stars of Gemini in our catalogue. To find it, start from Pollux, the brightest: it lies about 10° away (a fist at arm's length covers about 10°).

The light you see today left it about 1,500 years ago.

Find it on the sky map

It opens in your browser. Free, no account, nothing to install.

Leave your signature on Omega Geminorum

Your name and a message go up on the map for everyone to read. Signing is free.

Without a lock, someone else can replace your signature. How the lock works

We'll ask for an email to confirm it's you, 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 Omega Geminorum

Constellation: Gemini
Apparent magnitude: 5.20
Distance: 1489.5 light years
Coordinates (J2000): RA 105.603° · Dec 24.215°
Catalogue: HIP 33927 · HD 52497

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