B-type star · blue-white star

40 Per

1,056 lybrightness mag 4.97B0.5V

Also catalogued as HR 1123 · HD 22951 · HIP 17313

10,766 K

temperature

4.97

apparent magnitude

938× ☉

luminosity vs Sun

B0.5V

spectral type

Distance & comparison with our Sun

1,056 years

at light speed from Earth

1.87×

as hot as the Sun

938×

the Sun's light output

-2.58

absolute magnitude

Explore from here · roam the neighborhood

40 PerB-type

Sky regionPerseusthis direction

Nearest stars

Atik →73 ly apart
HR 1286 →130 ly apart
HR 991 →150 ly apart
55 Ari →160 ly apart
HR 1222 →180 ly apart
52 Per →190 ly apart

Bright stars in Perseus

Mirfak →mag 1.8
44Zet Per →mag 2.8
45Eps Per →mag 2.9
23Gam Per →mag 2.9
39Del Per →mag 3.0
25Rho Per →mag 3.3
Miram →mag 3.8
41Nu Per →mag 3.8

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.