M-type star · red

HR 9099

HR 9099 is a red in the constellation Cepheus 867 ly from Earth. Its surface is about 3,609 K, about 0.6 times the Sun's surface temperature, and it shines at 184× the Sun's brightness. At magnitude 6.3 it is within reach of 50 mm binoculars; the light you see left it 867 years ago.

867 lybrightness mag 6.31M4

Also catalogued as HD 225136 · HIP 302

3,609 K
temperature
6.31
apparent magnitude
184× ☉
luminosity vs Sun
M4
spectral type
Distance & comparison with our Sun
867 years
at light speed from Earth
0.63×
as hot as the Sun
184×
the Sun's light output
-0.81
absolute magnitude
Explore from here · roam the neighborhood
HR 9099M-type
Sky regionCepheusthis direction
Star10 Cas38 ly
Star13 Cas110 ly
Star4 Cas120 ly
StarAlderaminstar
StarErraistar
Nearest stars
Bright stars in Cepheus
Can you see it tonight?
BINOCULARS NEEDED
Brightness mag 6.3To see it 50 mm binocularsLook toward Cepheus

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.