NGC 6888 Crescent Nebula, 50×45 sec

I found some forgotten raw material I collected during the summer. Tech details show the frames were more like tests than a serious attempt at photographing this object. Nevertheless it was worth the shot.

NGC 6888, also known to amateurs as Caldwell 27, the Crescent nebula is a faint, 10m deep sky object in Cygnus, near the well known Sadr (γ Cygni) region. The nebula is blown by the Wolf-Rayet star WR 136 (HD 192163).

There is a “flaming” feature at the bottom of this frame, which is part of a much fainter nebulosity system more evident on other picturesThe gamma Cygni region, reprocessed on 2016-10-14 I have taken of the gamma Cygni region.

Tech data: Canon 1100D mod, 50×45 sec, ISO 3200, SW N 150/750 + Baader MPCC Mark III, HEQ5, Dângău Mare. Light collected on 2016-08-05, data processed on 2016-01-09, 10.

 

raw sample

raw sample

raw sample curved, note the noise

raw sample curved, note the noise

50x stack

50x stack

stack curved: less noise

stack curved: less noise

the stack developed

the stack developed

stage

stage

stage

stage

many stars

many stars

less stars

less stars

NGC 6888 Crescent Nebula, final picture

NGC 6888 Crescent Nebula, final picture

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