M35 - Pi in the sky (Tom Gray)

M35 - Pi in the sky

I was starting to think clear nights were ‘pie the sky’, so jumped at the opportunity last night when the skies eventually cleared!

Still testing out my RPi4 computer running Stellarmate OS, for image capture. First use of the polar assistant tool which worked well. Astrometry got me on target quickly, allowing me to frame and sequence object capture. I used VNC to access the Pi, the App remains rather 'hit and miss'. Having done a short integration with my Pi, I decided this is an object that benefits from longer integration for better star colour. This is a combination of 60s and 3m exposures to bring out the fainter NGC 2158, which lies 10 times further away. These golden-red stars are also much older ~2 Billion years, than the much younger blue-white stars in M35.

Data were captured using Stellarmate OS (KStars Ekos), stacked in Nebulosity and then processed in SiRIL (original), Startools (B) and Nebulosity (C). I am very happy with the results from SiRIL, good green noise reduction, background extraction and photometric colour calibration, followed by deconvolution and a gentle noise reduction (although some artifacts remain from this).

Guided using PHD2, I managed to get ~RMS down to around 2.8" in RA, using the guiding assistant tool, but further tweaks definitely required to optimise this. Seeing was not particularly good last night, with heavy dew, and I lost a couple of hours due to high cloud and haze passing through. Nevertheless, great to be out there again, and once up and running the Pi performed flawlessly.

Final
Original
B
C

B

Title: Processed in Startools

Description: Not as natural as the original, and perhaps a little colour saturated, but Startools has done a decent job with this data. Wipe, DDP stretch, followed by deconvolution, star reduction, colour constancy, and no noise reduction (which tends to create holes in the bright stars).

Uploaded: ...

C

Title: Processed using Nebulosity 4

Description: Simple levels and curves followed by star reduction and gentle denoise

Uploaded: ...

Low-Cost Astrophotography
Messier Objects
Altair Astro 183 M/C Hypercams
UK Astro-Imaging

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Status	Advanced success
Started	...
Astrometry.net job	7353461
PixInsight job	HF981SF9HNVNWB55BY6FH1UWFPFVV6A5
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h08m11s.65
RA (top/left)	06h11m44s.43
RA (top/right)	06h04m16s.41
RA (bottom/right)	06h04m40s.86
RA (bottom/left)	06h12m05s.12

Dec (center)	+24°16′56″.1
Dec (top/left)	+24°53′42″.10
Dec (top/right)	+24°45′38″.1
Dec (bottom/right)	+23°39′51″.2
Dec (bottom/left)	+23°47′50″.4

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M35 - Pi in the sky

M35 - Pi in the sky

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M35 - Pi in the sky

M35 - Pi in the sky

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