K-type star · orange
21 Cnc
21 Cnc is an orange in the constellation Cancer 889 ly from Earth. Its surface is about 3,783 K, about 0.7 times the Sun's surface temperature, and it shines at 233× the Sun's brightness. At magnitude 6.1 it is within reach of 50 mm binoculars; the light you see left it 889 years ago.
Also catalogued as HR 3290 · HD 70734 · HIP 41163
3,783 K
temperature
6.11
apparent magnitude
233× ☉
luminosity vs Sun
M2III
spectral type
Distance & comparison with our Sun
889 years
at light speed from Earth
0.66×
as hot as the Sun
233×
the Sun's light output
-1.07
absolute magnitude
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BINOCULARS NEEDED
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.