A-type star · white star
3 UMi
3 UMi is a white star in the constellation Ursa Minor 427 ly from Earth. Its surface is about 8,486 K, about 1.5 times the Sun's surface temperature, and it shines at 39.99× the Sun's brightness. At magnitude 6.4 it is within reach of 50 mm binoculars; the light you see left it 427 years ago.
Also catalogued as HR 5305 · HD 124063 · HIP 68956
8,486 K
temperature
6.43
apparent magnitude
39.99× ☉
luminosity vs Sun
A7V
spectral type
Distance & comparison with our Sun
427 years
at light speed from Earth
1.47×
as hot as the Sun
39.99×
the Sun's light output
0.84
absolute magnitude
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BINOCULARS NEEDED
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.