M-type star · red
Gacrux
Gacrux is a red in the constellation Crux 88.6 ly from Earth. Its surface is about 3,649 K, about 0.6 times the Sun's surface temperature, and it shines at 148× the Sun's brightness. At magnitude 1.6 it is bright enough to see with the naked eye; the light you see left it 89 years ago.
Also catalogued as Gamma Cru · HR 4763 · HD 108903 · HIP 61084
3,649 K
temperature
1.59
apparent magnitude
148× ☉
luminosity vs Sun
M4III
spectral type
Distance & comparison with our Sun
89 years
at light speed from Earth
0.63×
as hot as the Sun
148×
the Sun's light output
-0.58
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.