B-type star · blue-white star

HR 189

HR 189 is a blue-white star in the constellation Cassiopeia 624 ly from Earth. Its surface is about 11,796 K, about 2.0 times the Sun's surface temperature, and it shines at 173× the Sun's brightness. At magnitude 5.7 it is bright enough to see with the naked eye; the light you see left it 624 years ago.

624 lybrightness mag 5.66B5V...

Also catalogued as HD 4142 · HIP 3478

11,796 K

temperature

5.66

apparent magnitude

173× ☉

luminosity vs Sun

B5V...

spectral type

Distance & comparison with our Sun

624 years

at light speed from Earth

2.04×

as hot as the Sun

173×

the Sun's light output

-0.75

absolute magnitude

Explore from here · roam the neighborhood

HR 189B-type

Sky regionCassiopeiathis direction

Nearest stars

Bright stars in Cassiopeia

Can you see it tonight?

VISIBLE TO THE NAKED EYE

Brightness mag 5.7To 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.