hip-31216

Highly luminous star

Its story

13 Monocerotis is a white A0 Ib supergiant used as a spectral standard for its class. It outshines the Sun by roughly 10,800 times and sits within the Monoceros OB1 association, midway between the Rosette Nebula and NGC 2264. A small reflection nebula —Van den Bergh 81— wraps it in a diffuse halo. Among A-type supergiants studied with the Hipparcos satellite, it stood out as the least variable: a quiet rarity among restless giants.

Constellation: Monoceros
Apparent magnitude: 4.47
Distance: 326200.0 light years
Coordinates (J2000): RA 98.226° · Dec 7.333°
Catalogue: HIP 31216 · HD 46300

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Symbolic commemorative gift — no ownership, no IAU recognition.