IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula (Sean O'Hara)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD14552 · HD14558 · HD14794 · HD14817 · HD15022 · HD15069 · HD15102 · HD15239 · HD15250 · HD15382 · HD15522 · HD15557 · HD15558 · HD15570 · HD15629 · HD15640 · HD15665 · HD15785 · HD15851 · HD16183 · HD16218 · HD16349 · HD16410 · HD16799 · HD236966 · IC 1795 · IC 1805 · IC 1831 · LBN 645 · LBN 646 · And 25 more.

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IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

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IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

Took a gap in the clouds to do some setup testing on my refractor and verify some collimation tweaks to this Sharpstar 150 scope. I only have one guide scope, and I didn't bother switching it over to the Newtonian for this imaging, thinking my alignment woes would continue. Seemed good enough, so went for another experiment and gathered shorter exposures than I normally have, especially with a dual narrowband. This f/2.8 scope might be a little too fast for the filter, but so far so good.
I think I achieved the best collimation yet with this scope, but maybe a little more fine tuning with the autocollimation tool. The defocused stars closer to edges of frame are noticeably not round, would love to find an image with this scope of what out of focus star fields look like - just not sure with the offset secondary and all...

No guiding, and non-guided dither apparently did not work as expected... and a FULL moon. all things considered, I'm pleased with what the setup can produce.

Original
B
Final
C

B

Description: reprocessed with flats that didn't load properly on 1st run.
Image is without guiding or dithering

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Status	Advanced success
Started	...
Astrometry.net job	7240239
PixInsight job	RLMMZ0SONAYMNMN427J04VDICORGM79M
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h31m54s.14
RA (top/left)	02h34m15s.68
RA (top/right)	02h45m32s.45
RA (bottom/right)	02h29m14s.97
RA (bottom/left)	02h19m01s.66

Dec (center)	+61°35′57″.2
Dec (top/left)	+59°48′43″.2
Dec (top/right)	+62°26′54″.8
Dec (bottom/right)	+63°23′01″.10
Dec (bottom/left)	+60°40′16″.5

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IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

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IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

IC1805 / Sh2-190 / Melotte 15 - The Heart Nebula

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