Star profile

57 Geminorum

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

What is 57 Geminorum

57 Geminorum is a yellow G8 giant well past its youth: swollen to about seven times the Sun's radius, it shines roughly thirty times brighter from 159 light-years away. It surfaces at magnitude 5.04 on the eastern edge of Gemini, where Castor and Pollux command the stage. Around 1.2 billion years old, it has burned through its core hydrogen and begun the slow expansion of maturity.

Where it is and when to see it

57 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 64° above the horizon.
From New York it culminates about 74° above the horizon.
From Sydney it culminates about 31° above the horizon.

It can be seen from anywhere north of 65° S.

It ranks no. 28 in brightness among the 74 stars of Gemini in our catalogue. To find it, start from Pollux, the brightest: it lies about 6° away (a fist at arm's length covers about 10°).

The light you see today left it about 160 years ago.

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Astronomical data for 57 Geminorum

Constellation: Gemini
Apparent magnitude: 5.04
Distance: 159.0 light years
Coordinates (J2000): RA 110.869° · Dec 25.051°
Catalogue: HIP 35846 · HD 57727

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Other stars in Gemini

Gemini has 74 stars in Stelvia's catalogue. Here are a few of them.

See all 74 stars in Gemini