M51 - 96% moon and no light suppression filter (Simon)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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M51 - 96% moon and no light suppression filter

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M51 - 96% moon and no light suppression filter

As so often seems the case, I only have opportunity to try out my relatively new f12 Cassegrain when the moon is very up - so I decided to do another crazy thing and image the famous whirlpool galaxy with it at 96% illumination. I recently damaged my IDAS D2 filter and so ended up imaging without it, and I may not replace it, because having read some articles, I am not really convinced about their effectiveness, especially with white LED light. As one can imagine, this was a bit of a struggle, and one of the things I do not know how to sort out, is the fact that I cannot get the image as sharp as other images from other scopes. Is it because I am running at f12, is it something to do with the bright light from the moon as well? I do not know. Either way, I am pleased to have got what I did. At 3 minutes exposure time per sub, this calculates to an imaging time of 5 hours. Since imaging this, the UK has had several heavy storms and recorded its strongest wind ever at 122mph, which was about 40 miles from here! Have a good night everyone...

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Status	Advanced success
Started	...
Astrometry.net job	5511506
PixInsight job	CYHH24646MEA6JQ51POTWUVLKMOY9IHB
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h29m47s.960
RA (top/left)	13h30m31s.498
RA (top/right)	13h30m52s.335
RA (bottom/right)	13h29m02s.242
RA (bottom/left)	13h28m42s.259

Dec (center)	+47°14′10″.43
Dec (top/left)	+46°59′19″.25
Dec (top/right)	+47°26′38″.19
Dec (bottom/right)	+47°29′00″.96
Dec (bottom/left)	+47°01′41″.22

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M51 - 96% moon and no light suppression filter

M51 - 96% moon and no light suppression filter

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M51 - 96% moon and no light suppression filter

M51 - 96% moon and no light suppression filter

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