Omi

Variable star

Its story

Omicron Cassiopeiae is a bluish B-type giant some 703 light-years away, a hot, massive star whose stellar wind can carve disks of gas around it. It belongs to the family of so-called Be stars, known for variability tied to the forming and dispersing of these disks. Its light pulses, subtly, within the great W traced by Queen Cassiopeia across the northern sky.

Constellation: Cassiopeia
Apparent magnitude: 4.48
Distance: 703.0 light years
Coordinates (J2000): RA 11.181° · Dec 48.284°
Catalogue: HIP 3504 · HD 4180

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