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BC Cygni

PostPosted: Sat Dec 06, 2014 1:47 pm
by cybermystic
I put this one up a while back as it showed P Cygni - one of the most luminous stars in the Milky Way.
I knew it also contained the bright Carbon star SAO 69636 near the crescent, and I saw another bright red star towards bottom left that I knew wasn't a Carbon star so I ignored it.
However, it obviously didn't ignore me so I just had a look on a planetarium program to see if it was anything special and of course it is.
It is BC Cygni a red supergiant star, class M3.51a, Mag B 13.19 and Mag V 9.55 - so VERY red as you can see.
One of the largest known stars with a radius of 1140 - 1230 solar radii.
So a very special star indeed grin01 grin01 grin01

ImageP Cygni annotated by cybermystic, on Flickr

Greg