B-type star · blue-white star

39 UMa

39 UMa is a blue-white star in the constellation Ursa Major 370 ly from Earth. Its surface is about 10,625 K, about 1.8 times the Sun's surface temperature, and it shines at 54.10× the Sun's brightness. At magnitude 5.8 it is bright enough to see with the naked eye; the light you see left it 370 years ago.

370 lybrightness mag 5.79A0Vs

Also catalogued as HR 4187 · HD 92728 · HIP 52478

10,625 K
temperature
5.79
apparent magnitude
54.10× ☉
luminosity vs Sun
A0Vs
spectral type
Distance & comparison with our Sun
370 years
at light speed from Earth
1.84×
as hot as the Sun
54.10×
the Sun's light output
0.52
absolute magnitude
Explore from here · roam the neighborhood
39 UMaB-type
Sky regionUrsa Majorthis direction
Star43 UMa15 ly
StarHR 395851 ly
StarHR 391153 ly
StarAliothstar
StarDubhestar
Nearest stars
Bright stars in Ursa Major
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.8To see it no equipment neededLook toward Ursa 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.