K-type star · orange
21 Cet
21 Cet is an orange in the constellation Cetus 429 ly from Earth. Its surface is about 4,967 K, about 0.9 times the Sun's surface temperature, and it shines at 52.14× the Sun's brightness. At magnitude 6.2 it is within reach of 50 mm binoculars; the light you see left it 429 years ago.
Also catalogued as HR 255 · HD 5268 · HIP 4257
4,967 K
temperature
6.15
apparent magnitude
52.14× ☉
luminosity vs Sun
G5IV
spectral type
Distance & comparison with our Sun
429 years
at light speed from Earth
0.86×
as hot as the Sun
52.14×
the Sun's light output
0.56
absolute magnitude
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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.