B-type star · blue-white star

Lambda Cas

Lambda Cas is a blue-white star in the constellation Cassiopeia 377 ly from Earth. Its surface is about 11,539 K, about 2.0 times the Sun's surface temperature, and it shines at 148× the Sun's brightness. At magnitude 4.7 it is bright enough to see with the naked eye; the light you see left it 377 years ago.

377 lybrightness mag 4.74B8Vn

Also catalogued as HR 123 · HD 2772 · HIP 2505

11,539 K
temperature
4.74
apparent magnitude
148× ☉
luminosity vs Sun
B8Vn
spectral type
Distance & comparison with our Sun
377 years
at light speed from Earth
2.00×
as hot as the Sun
148×
the Sun's light output
-0.58
absolute magnitude
Explore from here · roam the neighborhood
Lambda CasB-type
Sky regionCassiopeiathis direction
StarHR 12412 ly
StarNu Cas46 ly
StarHR 901953 ly
StarCihstar
StarSchedarstar
Nearest stars
Bright stars in Cassiopeia
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 4.7To 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.