hip-35699

Cool red star

Its story

56 Geminorum is a red M0III hypergiant, cool and immense: it radiates roughly 380 times the Sun's light from a surface barely 3,700 K. Its brightness drifts gently between magnitudes 5.19 and 5.23, and it is suspected to be part of a multiple system observable only with large telescopes. Its blood-red light travels 443 years across Gemini before reaching us.

Constellation: Gemini
Apparent magnitude: 5.09
Distance: 443.2 light years
Coordinates (J2000): RA 110.487° · Dec 20.444°
Catalogue: HIP 35699 · HD 57423

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Symbolic commemorative gift — no ownership, no IAU recognition.