B-type star · blue-white star

Delta Per

Delta Per is a blue-white star in the constellation Perseus 516 ly from Earth. Its surface is about 12,011 K, about 2.1 times the Sun's surface temperature, and it shines at 1,363× the Sun's brightness. At magnitude 3.0 it is bright enough to see with the naked eye; the light you see left it 516 years ago.

516 lybrightness mag 3.01B5III SB

Also catalogued as HR 1122 · HD 22928 · HIP 17358

12,011 K

temperature

3.01

apparent magnitude

1,363× ☉

luminosity vs Sun

B5III SB

spectral type

Distance & comparison with our Sun

516 years

at light speed from Earth

2.08×

as hot as the Sun

1,363×

the Sun's light output

-2.99

absolute magnitude

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Delta PerB-type

Sky regionPerseusthis direction

Nearest stars

Bright stars in Perseus

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 3.0To see it no equipment neededLook 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.