A-type star · white star

HR 8243

HR 8243 is a white star in the constellation Cepheus 1,510 ly from Earth. Its surface is about 9,008 K, about 1.6 times the Sun's surface temperature, and it shines at 1,146× the Sun's brightness. At magnitude 5.5 it is bright enough to see with the naked eye; the light you see left it 1,510 years ago.

1,510 lybrightness mag 5.53B1II

Also catalogued as HD 205139 · HIP 106227

9,008 K
temperature
5.53
apparent magnitude
1,146× ☉
luminosity vs Sun
B1II
spectral type
Distance & comparison with our Sun
1,510 years
at light speed from Earth
1.56×
as hot as the Sun
1,146×
the Sun's light output
-2.80
absolute magnitude
Explore from here · roam the neighborhood
HR 8243A-type
Sky regionCepheusthis direction
StarHR 8357140 ly
StarHR 8490250 ly
StarHR 8226270 ly
StarAlderaminstar
StarErraistar
Nearest stars
Bright stars in Cepheus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.5To see it no equipment neededLook toward Cepheus

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.