B-type star · blue-white star
HR 342
HR 342 is a blue-white star in the constellation Cassiopeia 405 ly from Earth. Its surface is about 10,824 K, about 1.9 times the Sun's surface temperature, and it shines at 80.02× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 405 years ago.
Also catalogued as HD 6960 · HIP 5566
10,824 K
temperature
5.56
apparent magnitude
80.02× ☉
luminosity vs Sun
B9.5V
spectral type
Distance & comparison with our Sun
405 years
at light speed from Earth
1.88×
as hot as the Sun
80.02×
the Sun's light output
0.09
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.