B-type star · blue-white star

HR 2309

HR 2309 is a blue-white star in the constellation Canis Major 943 ly from Earth. Its surface is about 11,184 K, about 1.9 times the Sun's surface temperature, and it shines at 259× the Sun's brightness. At magnitude 6.1 it is within reach of 50 mm binoculars; the light you see left it 943 years ago.

943 lybrightness mag 6.12B4V

Also catalogued as HD 44996 · HIP 30468

11,184 K

temperature

6.12

apparent magnitude

259× ☉

luminosity vs Sun

B4V

spectral type

Distance & comparison with our Sun

943 years

at light speed from Earth

1.94×

as hot as the Sun

259×

the Sun's light output

-1.19

absolute magnitude

Explore from here · roam the neighborhood

HR 2309B-type

Sky regionCanis Majorthis direction

Nearest stars

Bright stars in Canis Major

Can you see it tonight?

BINOCULARS NEEDED

Brightness mag 6.1To 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.