NGC 6992 a bat out of hell (Tom Gray)

NGC 6992 a bat out of hell

I’ve been having a hell of a time trying to polar align my SA mount, wasting precious hours of clear sky. The guiding was way off and I just couldn’t figure out what was wrong, until I sat down and thought about it. I’d inverted the reticle in PSPro the App I use for aligning with Polaris! 🙄

I was pleased to have another run of clear nights, even if they coincide with a bright waning moon. I took the opportunity to run both my rigs together to capture NGC 6992 the eastern veil, a supernova remnant in Cygnus.

This image comprises 180s exposures using my UHC-L booster filter, taken over two nights. Processing has been bit of a nightmare, I failed to align the camera correctly between sessions and ended up with framing artefacts; I have tried to process these out, resulting in significant clipping of the image. Nevertheless I’m satisfied to have been able to produce something with a largely manual setup… what would I be like with something more complex!

Original
C
D
Final
E

C

Title: 46x300s (230m) integration

Description: Calibrated and stacked in ASTAP, processed in Siril with Starnet removal, Astrosharp, recomposition and final noise reduction

Uploaded: ...

D

Title: A not half bad bat

Description: Same processing, with just 19 x 300s (95m) data from the first night. Poor framing, but the seeing was so much better

Uploaded: ...

E

Title: Binned, cropped and sharpened

Description: I have had some success binning data from my Altair 183 OSC to boost SNR without too much loss in detail. In this instance I think the extra SNR has allowed me to pull out and sharpen more detail without excessive clipping. I've added a little more green to bring out that beautiful teal colour in the OIII.

Uploaded: ...

Altair Astro 183 M/C Hypercams

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Status	Advanced success
Started	...
Astrometry.net job	8423016
PixInsight job	P2NQAQ2WVJ5NSI7W6VEF2HBZ8G8VWRU4
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	20h56m52s.581
RA (top/left)	20h58m51s.470
RA (top/right)	20h59m06s.914
RA (bottom/right)	20h54m56s.354
RA (bottom/left)	20h54m37s.227

Dec (center)	+31°26′00″.50
Dec (top/left)	+32°06′49″.40
Dec (top/right)	+30°47′30″.72
Dec (bottom/right)	+30°44′40″.32
Dec (bottom/left)	+32°04′33″.83

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