A-type star · white star
HR 3840
HR 3840 is a white star in the constellation Vela 233 ly from Earth. Its surface is about 8,685 K, about 1.5 times the Sun's surface temperature, and it shines at 29.70× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 233 years ago.
Also catalogued as HD 83520 · HIP 47204
8,685 K
temperature
5.44
apparent magnitude
29.70× ☉
luminosity vs Sun
A2/A3V
spectral type
Distance & comparison with our Sun
233 years
at light speed from Earth
1.50×
as hot as the Sun
29.70×
the Sun's light output
1.17
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.