Star profile

Omicron 1 Canis Majoris

Variable star

3D likeness based on its real data · class K · ~4,200 K

What is Omicron 1 Canis Majoris

Omicron-1 Canis Majoris is a colossal red supergiant, nearly four hundred times the Sun's radius and thirty-seven thousand times its light, tied to the distant Collinder 121 association in the southern reaches of Canis Major. It pulses slowly between magnitudes 3.8 and 4.0 without a clear rhythm. Despite being barely eighteen million years old, it is already destined to explode as a Type II supernova in a cosmically near future.

Where it is and when to see it

Omicron 1 Canis Majoris lies in the southern celestial hemisphere. It is visible to the naked eye under a dark sky. Its best month of the year is January: the Sun sits at the opposite point of the sky and the star culminates around midnight. How high it climbs above the horizon depends on the latitude you watch from.

Find it on the sky map

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The signature wall

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A signature without a lock can be replaced by someone else's. The lock makes the signature permanent and lets you choose a symbolic name for the star, always shown next to the star's catalogue identifier. How the lock works

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Write my signature

A public signature from a real person. The chosen name is a symbolic denomination within Stelvia, with no official standing or IAU recognition: the sky is not for sale and belongs to no one.

Astronomical data for Omicron 1 Canis Majoris

Constellation: Canis Major
Apparent magnitude: 3.89
Distance: 326200.0 light years
Coordinates (J2000): RA 103.533° · Dec -24.184°
Catalogue: HIP 33152 · HD 50877

A symbolic commemorative gift: neither the signature nor the chosen name implies ownership of the star or recognition by the IAU.

Other stars in Canis Major

Canis Major has 90 stars in Stelvia's catalogue. Here are a few of them.

See all 90 stars in Canis Major