Pi

Cool red star

Its story

Pi Geminorum is a cool red giant 662 light-years away, near the edge of the Twins' rectangle beside Pollux. Its surface does not exceed 3,500 degrees and its radius dwarfs the Sun's: were it to replace our star, its outline would draw close to the orbit of Mercury. A deep red best seen through binoculars, beside the golden yellow of its famous neighbour.

Constellation: Gemini
Apparent magnitude: 5.14
Distance: 661.7 light years
Coordinates (J2000): RA 116.876° · Dec 33.416°
Catalogue: HIP 38016 · HD 62898

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