A-type star · white star
21 Pup
21 Pup is a white star in the constellation Puppis 894 ly from Earth. Its surface is about 9,466 K, about 1.6 times the Sun's surface temperature, and it shines at 194× the Sun's brightness. At magnitude 6.3 it is within reach of 50 mm binoculars; the light you see left it 894 years ago.
Also catalogued as HR 3257 · HD 69665 · HIP 40604
9,466 K
temperature
6.32
apparent magnitude
194× ☉
luminosity vs Sun
A1V
spectral type
Distance & comparison with our Sun
894 years
at light speed from Earth
1.64×
as hot as the Sun
194×
the Sun's light output
-0.87
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.