NML Cygni
Star in the constellation Cygnus / From Wikipedia, the free encyclopedia
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NML Cygni or V1489 Cygni (abbreviated to NML Cyg or V1489 Cyg) is a red hypergiant[4] or red supergiant (RSG) in the constellation Cygnus. It is possibly one of the largest known stars currently known, and is also possibly one of the most luminous and massive cool hypergiants, as well as one of the most luminous stars in the Milky Way.
The distance of NML Cygni from Earth is estimated to be around 1.6 kpc, about 5,300 light-years.[10] It is a part of the Cygnus OB2 association, one of the closest massive associations to the Sun, spanning nearly 2° on the sky or ~30 pc in radius at the distance of 1.74±0.2 kpc.[11]
The uniform disk angular diameter of NML Cygni is of 7.8±0.64 milliarcseconds.[8] At the estimated distance of 1,630 parsecs (5,300 ly), derived using NML Cygni's parallax,[4] the radius of NML Cygni is calculated at 1,350 R☉. If placed at the center of the Solar System, its surface would potentially extend past the orbit of Jupiter.