Finally I was able to portray this wonder of the sky during 4 nights of exceptionally good conditions, at least for my Bortle 7 location.
I recently produced
a wide field of Central Cygnus where WR134 appears just as a paint stroke corresponding to the north-western bright crescent, while here the whole circular structure with its characteristic toothed edge is legible.
I found that
the magnified OIII channel of this image had its own character, therefore I published it separately.
WR 134 (and WR 135)WR 134 (identified by HD191765 in our image) is a variable Wolf-Rayet star located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is five times the radius of the sun, but due to a temperature over 63000 K it is 400000 times as luminous as the Sun.
WR 134 was one of three stars in Cygnus observed in 1867 to have unusual spectra consisting of intense emission lines rather than the more normal continuum and absorption lines. These were the first members of the class of stars that came to be called Wolf-Rayet stars (WR stars) after Charles Wolf and Georges Rayet who discovered their unusual appearance.
WR 134 is less than a degree away from WR 135 (HD192103, left of the center) and the two are believed to lie at approximately the same distance from Earth within the Cygnus OB3 association. Both stars lie within a shell of hydrogen thought to have been swept up from the interstellar medium when one or both stars were on the main sequence. It is unclear which of the two stars is primarily responsible for creating the shell.
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