B-type star · blue-white star
Upsilon¹ Cen
Upsilon¹ Cen is a blue-white star in the constellation Centaurus 427 ly from Earth. Its surface is about 13,781 K, about 2.4 times the Sun's surface temperature, and it shines at 423× the Sun's brightness. At magnitude 3.9 it is bright enough to see with the naked eye; the light you see left it 427 years ago.
Also catalogued as HR 5249 · HD 121790 · HIP 68282
13,781 K
temperature
3.87
apparent magnitude
423× ☉
luminosity vs Sun
B2IV-V
spectral type
Distance & comparison with our Sun
427 years
at light speed from Earth
2.39×
as hot as the Sun
423×
the Sun's light output
-1.72
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.