K-type star · orange
Upsilon Boo
Upsilon Boo is an orange in the constellation Boötes 263 ly from Earth. Its surface is about 3,764 K, about 0.7 times the Sun's surface temperature, and it shines at 136× the Sun's brightness. At magnitude 4.0 it is bright enough to see with the naked eye; the light you see left it 263 years ago.
Also catalogued as HR 5200 · HD 120477 · HIP 67459
3,764 K
temperature
4.05
apparent magnitude
136× ☉
luminosity vs Sun
K5IIIvar
spectral type
Distance & comparison with our Sun
263 years
at light speed from Earth
0.65×
as hot as the Sun
136×
the Sun's light output
-0.49
absolute magnitude
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VISIBLE TO THE NAKED EYE
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.