B-type star · blue-white star

23 Cas

23 Cas is a blue-white star in the constellation Cassiopeia 771 ly from Earth. Its surface is about 11,031 K, about 1.9 times the Sun's surface temperature, and it shines at 331× the Sun's brightness. At magnitude 5.4 it is bright enough to see with the naked eye; the light you see left it 771 years ago.

771 lybrightness mag 5.42B8III

Also catalogued as HR 208 · HD 4382 · HIP 3721

11,031 K
temperature
5.42
apparent magnitude
331× ☉
luminosity vs Sun
B8III
spectral type
Distance & comparison with our Sun
771 years
at light speed from Earth
1.91×
as hot as the Sun
331×
the Sun's light output
-1.45
absolute magnitude
Explore from here · roam the neighborhood
23 CasB-type
Sky regionCassiopeiathis direction
Star13 Cas110 ly
StarHR 8599120 ly
StarOmega Cas120 ly
StarCihstar
StarSchedarstar
Nearest stars
Bright stars in Cassiopeia
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.4To see it no equipment neededLook toward Cassiopeia

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.