Star profile

63 Geminorum

3D likeness based on its real data · class F · ~6,500 K

What is 63 Geminorum

63 Geminorum lies just 105 light-years away, in the constellation of the Twins, Castor and Pollux. Behind its yellow-white F-type glow hides a hierarchical multiple system of as many as six components —a small stellar town bound together by gravity. Its surface hovers near 6,470 kelvin, hotter than the Sun's, and it burns roughly twice as white and as brisk as our daytime star.

Where it is and when to see it

63 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 60° above the horizon.
From New York it culminates about 71° above the horizon.
From Sydney it culminates about 35° above the horizon.

It can be seen from anywhere north of 69° S.

It ranks no. 37 in brightness among the 74 stars of Gemini in our catalogue. To find it, start from Pollux, the brightest: it lies about 8° away (a fist at arm's length covers about 10°).

The light you see today left it about 100 years ago.

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Astronomical data for 63 Geminorum

Constellation: Gemini
Apparent magnitude: 5.20
Distance: 104.5 light years
Coordinates (J2000): RA 111.935° · Dec 21.445°
Catalogue: HIP 36238 · HD 58728

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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