B-type star · blue-white star
Omicron Cas
Omicron Cas is a blue-white star in the constellation Cassiopeia 703 ly from Earth. Its surface is about 11,076 K, about 1.9 times the Sun's surface temperature, and it shines at 653× the Sun's brightness. At magnitude 4.5 it is bright enough to see with the naked eye; the light you see left it 703 years ago.
Also catalogued as HR 193 · HD 4180 · HIP 3504
11,076 K
temperature
4.48
apparent magnitude
653× ☉
luminosity vs Sun
B5III
spectral type
Distance & comparison with our Sun
703 years
at light speed from Earth
1.92×
as hot as the Sun
653×
the Sun's light output
-2.19
absolute magnitude
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VISIBLE TO THE NAKED EYE
Star data from the HYG database v4.2 (Astronexus, CC BY-SA 4.0). Temperature and colour computed by gravityfinder from the B-V colour index; the illustration is generated from that temperature, not a photograph.