B-type star · blue-white star

HR 7777

HR 7777 is a blue-white star in the constellation Cygnus 2,589 ly from Earth. Its surface is about 11,975 K, about 2.1 times the Sun's surface temperature, and it shines at 1,430× the Sun's brightness. At magnitude 6.5 it is within reach of 50 mm binoculars; the light you see left it 2,589 years ago.

2,589 lybrightness mag 6.46B2V

Also catalogued as HD 193536 · HIP 100142

11,975 K

temperature

6.46

apparent magnitude

1,430× ☉

luminosity vs Sun

B2V

spectral type

Distance & comparison with our Sun

2,589 years

at light speed from Earth

2.07×

as hot as the Sun

1,430×

the Sun's light output

-3.04

absolute magnitude

Explore from here · roam the neighborhood

HR 7777B-type

Sky regionCygnusthis direction

Nearest stars

Bright stars in Cygnus

Can you see it tonight?

BINOCULARS NEEDED

Brightness mag 6.5To see it 50 mm binocularsLook toward Cygnus

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.