B-type star · blue-white star
Asellus Borealis
Asellus Borealis is a blue-white star in the constellation Cancer 181 ly from Earth. Its surface is about 10,002 K, about 1.7 times the Sun's surface temperature, and it shines at 36.78× the Sun's brightness. At magnitude 4.7 it is bright enough to see with the naked eye; the light you see left it 181 years ago.
Also catalogued as Gamma Cnc · HR 3449 · HD 74198 · HIP 42806
10,002 K
temperature
4.66
apparent magnitude
36.78× ☉
luminosity vs Sun
A1IV
spectral type
Distance & comparison with our Sun
181 years
at light speed from Earth
1.73×
as hot as the Sun
36.78×
the Sun's light output
0.94
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.