B-type star · blue-white star

HR 2743

HR 2743 is a blue-white star in the constellation Canis Major 1,726 ly from Earth. Its surface is about 13,188 K, about 2.3 times the Sun's surface temperature, and it shines at 723× the Sun's brightness. At magnitude 6.3 it is within reach of 50 mm binoculars; the light you see left it 1,726 years ago.

1,726 lybrightness mag 6.32B2III

Also catalogued as HD 55985 · HIP 34954

13,188 K
temperature
6.32
apparent magnitude
723× ☉
luminosity vs Sun
B2III
spectral type
Distance & comparison with our Sun
1,726 years
at light speed from Earth
2.28×
as hot as the Sun
723×
the Sun's light output
-2.30
absolute magnitude
Explore from here · roam the neighborhood
HR 2743B-type
Sky regionCanis Majorthis direction
Star27 CMa120 ly
StarWezen170 ly
StarHR 2704200 ly
StarAdharastar
StarMirzamstar
Nearest stars
Bright stars in Canis Major
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 6.3To see it 50 mm binocularsLook 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.