K-type star · orange
21 Aqr
21 Aqr is an orange in the constellation Aquarius 388 ly from Earth. Its surface is about 3,869 K, about 0.7 times the Sun's surface temperature, and it shines at 79.36× the Sun's brightness. At magnitude 5.5 it is bright enough to see with the naked eye; the light you see left it 388 years ago.
Also catalogued as HR 8199 · HD 203926 · HIP 105767
3,869 K
temperature
5.48
apparent magnitude
79.36× ☉
luminosity vs Sun
K4III
spectral type
Distance & comparison with our Sun
388 years
at light speed from Earth
0.67×
as hot as the Sun
79.36×
the Sun's light output
0.10
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.