B-type star · blue-white star

21 CVn

21 CVn is a blue-white star in the constellation Canes Venatici 275 ly from Earth. Its surface is about 10,781 K, about 1.9 times the Sun's surface temperature, and it shines at 54.35× the Sun's brightness. At magnitude 5.1 it is bright enough to see with the naked eye; the light you see left it 275 years ago.

275 lybrightness mag 5.14A0V

Also catalogued as HR 5023 · HD 115735 · HIP 64906

10,781 K
temperature
5.14
apparent magnitude
54.35× ☉
luminosity vs Sun
A0V
spectral type
Distance & comparison with our Sun
275 years
at light speed from Earth
1.87×
as hot as the Sun
54.35×
the Sun's light output
0.51
absolute magnitude
Explore from here · roam the neighborhood
21 CVnB-type
Sky regionCanes Venaticithis direction
StarHR 508319 ly
StarLiesma27 ly
StarHR 491728 ly
StarCor Carolistar
StarCharastar
Nearest stars
Bright stars in Canes Venatici
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.1To see it no equipment neededLook toward Canes Venatici

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.