K-type star · orange
25 Gem
25 Gem is an orange in the constellation Gemini 2,064 ly from Earth. Its surface is about 4,537 K, about 0.8 times the Sun's surface temperature, and it shines at 918× the Sun's brightness. At magnitude 6.5 it is within reach of 50 mm binoculars; the light you see left it 2,064 years ago.
Also catalogued as HR 2453 · HD 47731 · HIP 32019
4,537 K
temperature
6.45
apparent magnitude
918× ☉
luminosity vs Sun
G5Ib
spectral type
Distance & comparison with our Sun
2,064 years
at light speed from Earth
0.79×
as hot as the Sun
918×
the Sun's light output
-2.56
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.