B-type star · blue-white star

HR 2640

HR 2640 is a blue-white star in the constellation Canis Major 1,019 ly from Earth. Its surface is about 12,796 K, about 2.2 times the Sun's surface temperature, and it shines at 472× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 1,019 years ago.

1,019 lybrightness mag 5.64B2/B3III/IV

Also catalogued as HD 52670 · HIP 33804

12,796 K
temperature
5.64
apparent magnitude
472× ☉
luminosity vs Sun
B2/B3III/IV
spectral type
Distance & comparison with our Sun
1,019 years
at light speed from Earth
2.22×
as hot as the Sun
472×
the Sun's light output
-1.83
absolute magnitude
Explore from here · roam the neighborhood
HR 2640B-type
Sky regionCanis Majorthis direction
StarHR 261143 ly
StarHR 277487 ly
StarHR 2686110 ly
StarAdharastar
StarWezenstar
Nearest stars
Bright stars in Canis Major
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.6To see it no equipment neededLook toward Canis Major

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.