K-type star · orange

HR 5540

HR 5540 is an orange in the constellation Apus 374 ly from Earth. Its surface is about 3,883 K, about 0.7 times the Sun's surface temperature, and it shines at 81.66× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 374 years ago.

374 lybrightness mag 5.37K4III

Also catalogued as HD 131109 · HIP 73223

3,883 K
temperature
5.37
apparent magnitude
81.66× ☉
luminosity vs Sun
K4III
spectral type
Distance & comparison with our Sun
374 years
at light speed from Earth
0.67×
as hot as the Sun
81.66×
the Sun's light output
0.07
absolute magnitude
Explore from here · roam the neighborhood
HR 5540K-type
Sky regionApusthis direction
StarTheta Aps20 ly
StarPi¹ Oct48 ly
StarHR 552050 ly
StarParadysstar
StarGamma Apsstar
Nearest stars
Bright stars in Apus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.4To see it no equipment neededLook 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.