B-type star · blue-white star

HR 5240

HR 5240 is a blue-white star in the constellation Apus 782 ly from Earth. Its surface is about 10,039 K, about 1.7 times the Sun's surface temperature, and it shines at 183× the Sun's brightness. At magnitude 6.1 it is within reach of 50 mm binoculars; the light you see left it 782 years ago.

782 lybrightness mag 6.09B9III

Also catalogued as HD 121439 · HIP 68431

10,039 K
temperature
6.09
apparent magnitude
183× ☉
luminosity vs Sun
B9III
spectral type
Distance & comparison with our Sun
782 years
at light speed from Earth
1.74×
as hot as the Sun
183×
the Sun's light output
-0.81
absolute magnitude
Explore from here · roam the neighborhood
HR 5240B-type
Sky regionApusthis direction
StarHR 511544 ly
StarHR 554750 ly
StarHR 518860 ly
StarParadysstar
StarGamma Apsstar
Nearest stars
Bright stars in Apus
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 6.1To see it 50 mm binocularsLook toward Apus

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.