B-type star · blue-white star

HR 5857

HR 5857 is a blue-white star in the constellation Boötes 299 ly from Earth. Its surface is about 10,681 K, about 1.9 times the Sun's surface temperature, and it shines at 46.95× the Sun's brightness. At magnitude 5.5 it is bright enough to see with the naked eye; the light you see left it 299 years ago.

299 lybrightness mag 5.48B9p...

Also catalogued as HD 140728 · HIP 76957

10,681 K

temperature

5.48

apparent magnitude

46.95× ☉

luminosity vs Sun

B9p...

spectral type

Distance & comparison with our Sun

299 years

at light speed from Earth

1.85×

as hot as the Sun

46.95×

the Sun's light output

0.67

absolute magnitude

Explore from here · roam the neighborhood

HR 5857B-type

Sky regionBoötesthis direction

Nearest stars

Bright stars in Boötes

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 5.5To see it no equipment neededLook toward Boötes

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.