Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  IC 1590  ·  IC1590  ·  NGC 281  ·  NGC281  ·  Sh2-184
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Pacman Nebula, 


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Imaging telescopes or lenses: Astro-Physics Riccardi-Honders 305mm

Imaging cameras: Finger Lakes Instruments ML16200

Mounts: 10 Micron GM3000 HPS

Guiding telescopes or lenses: Stellarvue F050G

Guiding cameras: ZWO ASI178MM

Software: Pleaides Astrophoto PixInsight 1.8 Ripley  ·  Starkeeper Voyager  ·  PHD2

Filters: Astrodon Gen 2 Series I Green  ·  Astrodon Gen 2 Series I Blue  ·  Astrodon Gen 2 Series I Red

Dates:Nov. 9, 2020

Frames: 282x140"

Integration: 11.0 hours

Avg. Moon age: 23.11 days

Avg. Moon phase: 39.87%

Astrometry.net job: 4002347

RA center: 0h 52' 42"

DEC center: +56° 37' 30"

Pixel scale: 1.103 arcsec/pixel

Orientation: -0.923 degrees

Field radius: 0.685 degrees

Resolution: 3384x2920

Locations: Mathias, Mathias, WV, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Although this is listed as "own remote observatory" it's not actually mine. I was invited as a guest into someone else's own remote observatory and while my equipment is there, this was taken with his (very nice) equipment.

This is the Pacman Nebula in RGB and was interesting to process. First, it was my first image with a CCD camera and it was interesting to see how processing CCD data differed from my own ASI1600 CMOS camera. On the plus side, the noise was smoother and better behaved. On the downside, the higher read noise made for longer exposures. Though on the plus side it was a 16-bit camera compared to my 12-bit camera. On the whole, it was pretty easy data to work with.

The image scale was just over 1"/pixel and quite a bit finer than on my rig. In the end I kept processing fairly simple:

On each R, G and B master:
Mure Denise

For the combined RGB master:
channel combination
Histogram Transformation
LHE (using a range mask)
Curves for saturation and contrast
Adv Sharpening script
Adam Block's modified star de-emphasis using starnet++


Sky plot

Sky plot


Pacman Nebula,