KY Cygni is a red hypergiant star in the constellation Cygnus. It is one of the largest known stars, with a radius of over 1,032 Solar Radii. It would be one of the brightest stars in the night sky if it weren’t for the dust surrounding it. KY Cygni also boasts a slow irregular variable star designation. KY Cygni is located near the Cooling tower cluster but is not a member.
Astronomical data
Radius (in Solar Radii): 1,032 R☉
Diameter (in Kilometers): 1,436,544,000 km
Mass (in Solar Masses): 19 M☉
Distance (in Light Years): 4,680 ly
Spectral type: M3 Ia (Red)
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Fantastic job AJ! I’ll be reading through your site and trying to find some of the stars using Stellarium.
Our newest article is on NML Cygni, another large star in the Cygnus constellation.
Check it out!