Sadr and Crescent wide field (kuechlew)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Extremely wide field

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Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

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Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

3h 15m integration time
I'm operating the Samying 135mm at f2.8, this leads to some diffraction spikes at the bright stars.
While guiding may not be necessary for such a wide field image I like to use the Lacerta MGEN 3 for polar alignment and it's very useful for dithering.
The RMS for the RA axis of the iOptron Skyguider Pro during the imaging session was usually between 0.8 and 0.9 arcseconds with occasional variations between 0.6 and 1.2 arcseconds. You can easily use exposure times up to 3 minutes guided. Since I'm sky limited I usually use 60-90 seconds, though.

As for most of my images the GHS script proved very useful for stretching the data. For more details see ghsastro – astrophotography and
https://www.astrobin.com/forum/c/astrophotography/deep-sky-processing-techniques/pixinsight-image-stretching-ghs-version-2

Clear skies
Wolfgang

Original
Final
B

B

Title: Sadr and Crescent wide field - cropped

Description: cropped in somewhat to remove not so interesting areas.

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Status	Basic success
Started	...
Astrometry.net job	5900542
PixInsight job	n/a
PixInsight queue size	n/a
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Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

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Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

Sadr and Crescent wide field

Revision title: Sadr and Crescent wide field - cropped

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