Cocoon Nebula (Tristan Campbell)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: B168 · Cocoon Nebula · HD207886 · HD208362 · IC 5146 · LBN 424 · LDN 1042 · LDN 1055 · Sh2-125 · VdB147

Cocoon Nebula

First image in a while and first proper image with my new Quattro 10. After getting the collimation really good earlier in the year I set the scope up for the first time in quite a while and found load of coma present. Assuming collimation issue as the scope had been moved lots fiddling with collimation did little to help - actually it made it worse as seeing was jut not good enough to collimate accurately.
After much time making things worse I finally realised it was actually the coma corrector spacing. The skywacher f/4 corrector was really odd - 54.5mm spacing rather than the standard 55mm. Then my 2600MC developed an oil leak an I had it replaced. The new camera needs spacing of just over 55mm. I've not got it quite right yet so stars here are not quite as good as I had them before as I decided they were acceptable and was loosing too much very limited imaging time fidding with it.

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Final
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Description: Reprocessed 2024

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Yorkshire Astro Imaging

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Status	Advanced success
Started	...
Astrometry.net job	9176558
PixInsight job	3H7CIH4YHDXBCKPL7220CMMECVDMA77H
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h52m03s.791
RA (top/left)	21h56m23s.972
RA (top/right)	21h49m08s.740
RA (bottom/right)	21h47m45s.550
RA (bottom/left)	21h54m55s.168

Dec (center)	+47°23′19″.39
Dec (top/left)	+47°36′16″.63
Dec (top/right)	+47°58′24″.30
Dec (bottom/right)	+47°09′44″.67
Dec (bottom/left)	+46°47′59″.37

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Cocoon Nebula

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Cocoon Nebula

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