KY Cygni

Stellar classification



  • X -4872
  • Y 16
  • Z 1124
→ Sol: 5,000

Object type

  • Red supergiant
  • Star
  • Carbon Star
  • Infra-Red source
  • Long-period variable star
  • Maser
  • Variable Star
simbad:V* KY Cyg


KY Cygni is a red supergiant of spectral class M3.5Ia located in the constellation Cygnus. It is one of the largest stars known. Its properties are very poorly known. Its estimated radius is 1,420–2,850 R (6.6–13.3 au). If it was placed at the center of the Solar System, it would extend past the orbit of Jupiter (or Saturn). It is also one of the most luminous stars, with about 300,000 or more times the Sun's luminosity. It is approximately 5,000 light-years away.

This article uses material from the Wikipedia article "KY Cygni", which is released under the Creative Commons Attribution-Share-Alike License 3.0.