B-type star · blue-white star

HR 91

HR 91 is a blue-white star in the constellation Cassiopeia 1,000 ly from Earth. Its surface is about 11,744 K, about 2.0 times the Sun's surface temperature, and it shines at 480× the Sun's brightness. At magnitude 5.6 it is bright enough to see with the naked eye; the light you see left it 1,000 years ago.

1,000 lybrightness mag 5.58B5IV

Also catalogued as HD 1976 · HIP 1921

11,744 K
temperature
5.58
apparent magnitude
480× ☉
luminosity vs Sun
B5IV
spectral type
Distance & comparison with our Sun
1,000 years
at light speed from Earth
2.03×
as hot as the Sun
480×
the Sun's light output
-1.85
absolute magnitude
Explore from here · roam the neighborhood
HR 91B-type
Sky regionCassiopeiathis direction
StarHR 24174 ly
StarHD 5927130 ly
StarHR 298130 ly
StarCihstar
StarSchedarstar
Nearest stars
Bright stars in Cassiopeia
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.6To 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.