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Contains:  NGC 281
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Pacman Nebula in SHO, 


            Bogdan Borz
Pacman Nebula in SHO

Pacman Nebula in SHO

Acquisition type: Electronically-Assisted Astronomy (EAA)

Technical card

Resolution: 4436x3247

Dates:Sept. 2, 2019Sept. 6, 2019Sept. 9, 2019Sept. 30, 2019

ZWO LRGB 36mm: 90x60" (gain: 139.00) -20C bin 1x1
ZWO SII 36mm: 76x300" (gain: 200.00) -20C bin 1x1
ZWO OIII 36mm: 76x300" (gain: 200.00) -20C bin 1x1
Zwo Ha 36mm: 72x300" (gain: 139.00) -20C bin 1x1

Integration: 20.2 hours

Darks: ~30

Flats: ~30

Bias: ~50

Avg. Moon age: 5.96 days

Avg. Moon phase: 38.26%

Bortle Dark-Sky Scale: 8.00 job: 2985745

RA center: 0h 52' 28"

DEC center: +56° 38' 49"

Pixel scale: 0.782 arcsec/pixel

Orientation: 101.040 degrees

Field radius: 0.597

Data source: Backyard


The Pacman in Hubble Palette with RGB stars. Pretty surprised to see some faint nebulosity appear in the outer regions with around 5h of extra exposure. The O and S subs are a mix of Zwo 7nm filters and the new Astrodon 3nm filters.

72 x 5min Ha gain 139 offset 21
76 x 5 min O3 gain 200 offset 50
76x 5min S2 gain 200 offset 50
30 x 1 min R gain 139 offset 21
30 x 1 min G gain 139 offset 21
30 x 1 min B gain 139 offset 21

The whole process unfolded over the month of september, over 7 nights.



Bogdan Borz
License: None (All rights reserved)


  • Pacman Nebula in SHO, 


            Bogdan Borz
  • Final
    Pacman Nebula in SHO, 


            Bogdan Borz

Sky plot

Sky plot


Pacman Nebula in SHO, 


            Bogdan Borz