B-type star · blue-white star

Tau CMa

Tau CMa is a blue-white star in the constellation Canis Major 2,992 ly from Earth. Its surface is about 12,141 K, about 2.1 times the Sun's surface temperature, and it shines at 13,098× the Sun's brightness. At magnitude 4.4 it is bright enough to see with the naked eye; the light you see left it 2,992 years ago.

2,992 lybrightness mag 4.37O9Ib

Also catalogued as HR 2782 · HD 57061 · HIP 35415

12,141 K

temperature

4.37

apparent magnitude

13,098× ☉

luminosity vs Sun

O9Ib

spectral type

Distance & comparison with our Sun

2,992 years

at light speed from Earth

2.10×

as hot as the Sun

13,098×

the Sun's light output

-5.44

absolute magnitude

Explore from here · roam the neighborhood

Tau CMaB-type

Sky regionCanis Majorthis direction

StarHR 2874200 ly

StarOmicron² CMa300 ly

StarHR 2614330 ly

StarAdharastar

StarWezenstar

Nearest stars

Bright stars in Canis Major

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 4.4To 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.