B-type star · blue-white star

3 Mon

3 Mon is a blue-white star in the constellation Monoceros 784 ly from Earth. Its surface is about 12,066 K, about 2.1 times the Sun's surface temperature, and it shines at 542× the Sun's brightness. At magnitude 4.9 it is bright enough to see with the naked eye; the light you see left it 784 years ago.

784 lybrightness mag 4.92B5III

Also catalogued as HR 2128 · HD 40967 · HIP 28574

12,066 K
temperature
4.92
apparent magnitude
542× ☉
luminosity vs Sun
B5III
spectral type
Distance & comparison with our Sun
784 years
at light speed from Earth
2.09×
as hot as the Sun
542×
the Sun's light output
-1.99
absolute magnitude
Explore from here · roam the neighborhood
3 MonB-type
Sky regionMonocerosthis direction
StarHD 4439470 ly
StarHR 195772 ly
StarHR 224995 ly
StarBeta Monstar
StarAlpha Monstar
Nearest stars
Bright stars in Monoceros
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 4.9To see it no equipment neededLook toward Monoceros

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.