A-type star · white star

40 Ser

40 Ser is a white star in the constellation Serpens 257 ly from Earth. Its surface is about 8,394 K, about 1.5 times the Sun's surface temperature, and it shines at 16.66× the Sun's brightness. At magnitude 6.3 it is within reach of 50 mm binoculars; the light you see left it 257 years ago.

257 lybrightness mag 6.28A7Vn

Also catalogued as HR 5919 · HD 142500 · HIP 77910

8,394 K
temperature
6.28
apparent magnitude
16.66× ☉
luminosity vs Sun
A7Vn
spectral type
Distance & comparison with our Sun
257 years
at light speed from Earth
1.45×
as hot as the Sun
16.66×
the Sun's light output
1.80
absolute magnitude
Explore from here · roam the neighborhood
40 SerA-type
Sky regionSerpensthis direction
StarHR 596323 ly
StarUpsilon Ser27 ly
StarPhi Ser30 ly
StarUnukalhaistar
StarEta Serstar
Nearest stars
Bright stars in Serpens
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 6.3To see it 50 mm binocularsLook toward Serpens

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.