B-type star · blue-white star

4 Per

4 Per is a blue-white star in the constellation Perseus 728 ly from Earth. Its surface is about 11,107 K, about 1.9 times the Sun's surface temperature, and it shines at 438× the Sun's brightness. At magnitude 5.0 it is bright enough to see with the naked eye; the light you see left it 728 years ago.

728 lybrightness mag 4.99B8III

Also catalogued as HR 590 · HD 12303 · HIP 9505

11,107 K
temperature
4.99
apparent magnitude
438× ☉
luminosity vs Sun
B8III
spectral type
Distance & comparison with our Sun
728 years
at light speed from Earth
1.92×
as hot as the Sun
438×
the Sun's light output
-1.75
absolute magnitude
Explore from here · roam the neighborhood
4 PerB-type
Sky regionPerseusthis direction
StarHR 47051 ly
StarPhi Per61 ly
StarHR 56192 ly
StarMirfakstar
StarZeta Perstar
Nearest stars
Bright stars in Perseus
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.0To 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.