NGC281 Pacman Nebula #6

 Posted: Jun 1st, 2025
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Technical Info
Telescope/Lens: Askar FRA300 Pro
Camera: ZWO ASI533MC Pro
Mount: ZWO AM3
Guide Scope: ZWO APO 30mm F/5
Guide Camera: ZWO ASI120 Mini
Software: ASIAIR, Siril
Accessories: Optolong IR-UV Cut filter
Exposure:
200 x 60" ISO/Gain: 100 - Охлаждение камеры -10 градусов
Red, Bortle 7 zone:
 Novosibirsk, Russia
 May 30th, 2025
3 h 20 m
398
Resolution: 3008x3008 px
Scale: 11610 KB
I continue to accumulate Pacman. Only 3 hours. Minimal processing, all in Siril (remove background gradient, remove green noise, auto histogram correction, move black point to 0.05).

What is noticeable:
1) Stars are not burning out, but there are too many of them, will have to remove or shoot a star layer with shorter exposure.
2) Degraded zones are noticeable on the sides due to dithering. They will need to be removed.
3) The lower left corner is heavily overexposed or otherwise vignetted. At the same time, I performed background gradient removal for both single frames and the result.
4) Color is not calibrated, as is.
Updated
  13 Jun, 2025
  8 h 41 m
Stars were taken from 10 sec subs through StarNet. Otherwise, cropping was done, I'll see which framing option is better.
  13 Jun, 2025
  8 h 40 m
Continuing to accumulate Pacman in Ha-OIII. The drizzle 2 option.
  7 Jun, 2025
  11 h 53 m
Put it all together (each stack has its own calibration files). Without star processing.
  7 Jun, 2025
  3 h 0 m
Narrowband filter. Accumulation is more efficient than for the broadband IR-UV CUT filter.
  5 Jun, 2025
  8 h 54 m
Here I added a stack of 180 seconds. I took the stars from the 10-second layer using StarNet. I adjusted the white balance.
  2 Jun, 2025
  7 h 41 m
Same as #7, but accumulated a bit more. No processing in StarNet.
  1 Jun, 2025
  3 h 20 m
The same as the Pacman Nebula NGC281 #6, but processed in Starnet. Removed the stars and restored them, dimming them.
Current photo
  1 Jun, 2025
  3 h 20 m
I continue to accumulate Pacman. Only 3 hours. Minimal processing, all in Siril (remove background gradient, remove green noise, auto histogram correction, move…
  31 May, 2025
  51 m
Another test FRA300.
  15 May, 2025
  1 h 7 m
The same equipment, ZWO APO 30 F/5 guide on a manual mount. SV705C camera. Gain reduced to 300, exposure 1 sec. Noticeable strong field rotation effect. The neb…
  12 May, 2025
  0
The same as in photo 2, but more stars have been restored.
  12 May, 2025
  46 m
Another test photo with the guider as a telescope, with manual guiding. With the 705 camera, the field of view is much larger than with the 662, so I shot with…
  7 May, 2025
  20 m
Test shot with telescope mounted on tripod, no tracking, from balcony in Bortle 7.
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