M-type star · red

HR 556

HR 556 is a red in the constellation Andromeda 921 ly from Earth. Its surface is about 3,650 K, about 0.6 times the Sun's surface temperature, and it shines at 306× the Sun's brightness. At magnitude 5.9 it is bright enough to see with the naked eye; the light you see left it 921 years ago.

921 lybrightness mag 5.89K5III

Also catalogued as HD 11727 · HIP 9001

3,650 K
temperature
5.89
apparent magnitude
306× ☉
luminosity vs Sun
K5III
spectral type
Distance & comparison with our Sun
921 years
at light speed from Earth
0.63×
as hot as the Sun
306×
the Sun's light output
-1.36
absolute magnitude
Explore from here · roam the neighborhood
HR 556M-type
Sky regionAndromedathis direction
StarHR 438120 ly
Star45 And190 ly
Star11 Ari190 ly
StarAlpheratzstar
StarMirachstar
Nearest stars
Bright stars in Andromeda
Can you see it tonight?
VISIBLE TO THE NAKED EYE
Brightness mag 5.9To see it no equipment neededLook toward Andromeda

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.