F-type star · yellow-white star

23 UMa

23 UMa is a yellow-white star in the constellation Ursa Major 77.7 ly from Earth. Its surface is about 7,101 K, about 1.2 times the Sun's surface temperature, and it shines at 17.12× the Sun's brightness. At magnitude 3.6 it is bright enough to see with the naked eye; the light you see left it 78 years ago.

77.7 lybrightness mag 3.65F0IV

Also catalogued as HR 3757 · HD 81937 · HIP 46733 · Gliese GJ 3559

7,101 K
temperature
3.65
apparent magnitude
17.12× ☉
luminosity vs Sun
F0IV
spectral type
Distance & comparison with our Sun
78 years
at light speed from Earth
1.23×
as hot as the Sun
17.12×
the Sun's light output
1.77
absolute magnitude
Explore from here · roam the neighborhood
23 UMaF-type
Sky regionUrsa Majorthis direction
StarSigma² UMa13 ly
Star16 UMa14 ly
Star37 UMa17 ly
StarAliothstar
StarDubhestar
Nearest stars
Bright stars in Ursa Major
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 3.6To 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.