Bet

Variable star

Its story

Beta Monocerotis is one of the sky’s most celebrated jewels: even a modest telescope splits it into a row of hot blue B-type suns, described by William Herschel in 1781 as «one of the most beautiful sights in the heavens». Some 677 light-years away, its combined light pulses with faint variations, a reminder that the single point our eye gathers is in truth a gravitational trio whose inner balance reaches our retina as a subtle, luminous trembling.

Constellation: Monoceros
Apparent magnitude: 3.76
Distance: 676.8 light years
Coordinates (J2000): RA 97.204° · Dec -7.033°
Catalogue: HIP 30867 · HD 45725

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