K-type star · orange
18 Sgr
18 Sgr is an orange in the constellation Sagittarius 640 ly from Earth. Its surface is about 4,434 K, about 0.8 times the Sun's surface temperature, and it shines at 196× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 640 years ago.
Also catalogued as HR 6888 · HD 169233 · HIP 90260
4,434 K
temperature
5.58
apparent magnitude
196× ☉
luminosity vs Sun
K0III
spectral type
Distance & comparison with our Sun
640 years
at light speed from Earth
0.77×
as hot as the Sun
196×
the Sun's light output
-0.88
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.