A-type star · white star

HR 540

HR 540 is a white star in the constellation Perseus 231 ly from Earth. Its surface is about 8,281 K, about 1.4 times the Sun's surface temperature, and it shines at 11.60× the Sun's brightness. At magnitude 6.4 it is within reach of 50 mm binoculars; the light you see left it 231 years ago.

231 lybrightness mag 6.44A5m

Also catalogued as HD 11408 · HIP 8847

8,281 K

temperature

6.44

apparent magnitude

11.60× ☉

luminosity vs Sun

A5m

spectral type

Distance & comparison with our Sun

231 years

at light speed from Earth

1.43×

as hot as the Sun

11.60×

the Sun's light output

2.19

absolute magnitude

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HR 540A-type

Sky regionPerseusthis direction

Nearest stars

Bright stars in Perseus

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BINOCULARS NEEDED

Brightness mag 6.4To see it 50 mm binocularsLook toward Perseus

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.