B-type star · blue-white star

HR 3817

HR 3817 is a blue-white star in the constellation Vela 830 ly from Earth. Its surface is about 11,814 K, about 2.0 times the Sun's surface temperature, and it shines at 505× the Sun's brightness. At magnitude 5.1 it is bright enough to see with the naked eye; the light you see left it 830 years ago.

830 lybrightness mag 5.12B4IV

Also catalogued as HD 82984 · HIP 46914

11,814 K
temperature
5.12
apparent magnitude
505× ☉
luminosity vs Sun
B4IV
spectral type
Distance & comparison with our Sun
830 years
at light speed from Earth
2.05×
as hot as the Sun
505×
the Sun's light output
-1.91
absolute magnitude
Explore from here · roam the neighborhood
HR 3817B-type
Sky regionVelathis direction
StarHR 389864 ly
StarHD 8136971 ly
StarHR 381981 ly
StarGamma² Velstar
StarAlsephinastar
Nearest stars
Bright stars in Vela
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.1To see it no equipment neededLook toward Vela

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.