B-type star · blue-white star
HR 3447
HR 3447 is a blue-white star in the constellation Vela 493 ly from Earth. Its surface is about 12,860 K, about 2.2 times the Sun's surface temperature, and it shines at 724× the Sun's brightness. At magnitude 3.6 it is bright enough to see with the naked eye; the light you see left it 493 years ago.
Also catalogued as HD 74195 · HIP 42536
12,860 K
temperature
3.60
apparent magnitude
724× ☉
luminosity vs Sun
B3IV
spectral type
Distance & comparison with our Sun
493 years
at light speed from Earth
2.23×
as hot as the Sun
724×
the Sun's light output
-2.30
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.