A-type star · white star

Alcor

Alcor is a white star in the constellation Ursa Major 81.7 ly from Earth. Its surface is about 8,411 K, about 1.5 times the Sun's surface temperature, and it shines at 13.87× the Sun's brightness. At magnitude 4.0 it is bright enough to see with the naked eye; the light you see left it 82 years ago.

81.7 lybrightness mag 3.99A5V SB

Also catalogued as 80 UMa · HR 5062 · HD 116842 · HIP 65477 · Gliese GJ 3785

8,411 K
temperature
3.99
apparent magnitude
13.87× ☉
luminosity vs Sun
A5V SB
spectral type
Distance & comparison with our Sun
82 years
at light speed from Earth
1.46×
as hot as the Sun
13.87×
the Sun's light output
2.00
absolute magnitude
Explore from here · roam the neighborhood
AlcorA-type
Sky regionUrsa Majorthis direction
StarZeta UMa3.0 ly
Star78 UMa5.5 ly
StarAlioth6.5 ly
StarDubhestar
StarAlkaidstar
Nearest stars
Bright stars in Ursa Major
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 4.0To 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.