K-type star · orange

HR 8138

HR 8138 is an orange in the constellation Cygnus 723 ly from Earth. Its surface is about 4,211 K, about 0.7 times the Sun's surface temperature, and it shines at 138× the Sun's brightness. At magnitude 6.2 it is within reach of 50 mm binoculars; the light you see left it 723 years ago.

723 lybrightness mag 6.23K2

Also catalogued as HD 202720 · HIP 105034

4,211 K
temperature
6.23
apparent magnitude
138× ☉
luminosity vs Sun
K2
spectral type
Distance & comparison with our Sun
723 years
at light speed from Earth
0.73×
as hot as the Sun
138×
the Sun's light output
-0.50
absolute magnitude
Explore from here · roam the neighborhood
HR 8138K-type
Sky regionCygnusthis direction
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Nearest stars
Bright stars in Cygnus
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BINOCULARS NEEDED
Brightness mag 6.2To see it 50 mm binocularsLook toward Cygnus

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.