A-type star · white star
Theta Cas
Theta Cas is a white star in the constellation Cassiopeia 134 ly from Earth. Its surface is about 8,403 K, about 1.5 times the Sun's surface temperature, and it shines at 26.82× the Sun's brightness. At magnitude 4.3 it is bright enough to see with the naked eye; the light you see left it 134 years ago.
Also catalogued as HR 343 · HD 6961 · HIP 5542
8,403 K
temperature
4.34
apparent magnitude
26.82× ☉
luminosity vs Sun
A7Vvar
spectral type
Distance & comparison with our Sun
134 years
at light speed from Earth
1.46×
as hot as the Sun
26.82×
the Sun's light output
1.28
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.