Hemisphere:  Northern  ·  Constellation: Cassiopeia (Cas)  ·  Contains:  NGC 281
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Pacman Nebula in Cassiopeia, 


            Steve Milne
Pacman Nebula in Cassiopeia
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Technical card

Imaging telescopes or lenses: TEC-140

Imaging cameras: QSI 690 WSG-8

Mounts: 10 Micron GM2000 HPS II UP

Guiding telescopes or lenses: TEC-140

Guiding cameras: Starlight Xpress Lodestar X2

Focal reducers: TEC Field Flattener

Software: Sequence Generator Pro  ·  Adobe Photoshop 6 CS  ·  Open PHD PHD 2.5  ·  Pixinsight 1.8

Filters: Astrodon OIII 3nm  ·  Astrodon SII 3nm  ·  Ha 3nm

Dates:Oct. 24, 2019

Ha 3nm: 30x1200" bin 1x1
Astrodon OIII 3nm: 30x1200" bin 1x1
Astrodon SII 3nm: 30x1200" bin 1x1

Integration: 30.0 hours

Avg. Moon age: 25.37 days

Avg. Moon phase: 18.33%

Basic astrometry details

Astrometry.net job: 3010465

RA center: 0h 52' 57"

DEC center: +56° 39' 7"

Pixel scale: 0.743 arcsec/pixel

Orientation: 90.030 degrees

Field radius: 0.443 degrees

Resolution: 3349x2688

Locations: E-EyE, Fregenal de la Sierra, Extremadura, Spain

Data source: Own remote observatory

Remote source: e-EyE Extremadura


NGC 281 is an 80 light-year diameter dust cloud some 10,000 light years away in the constellation of Cassiopeia. The nebula was discovered by EE Barnard in August 1883.

Contained within the cloud is the open cluster IC 1590.

NGC 281 contains a number of dark globules within which (it is believed) new stars are forming. These are named Bok Globules after the Dutch-American astronomer – Bart Bok who first described these in the 1940s.

The Pacman Nebula was photographed between 30 September and 24 October 2019 from a remote imaging rig that is jointly owned and operated by Barry Wilson and me.

Capture details are as follows:

Telescope: TEC 140
Camera: QSI 690
Filters: Astrodon
Mount: 10 Micron GM2000HPS

SII: 30 x 1200s
Ha: 30 x 1200s
OIII: 30 x 1200s

A total of 30 hours exposure.

Data: Steve Milne & Barry Wilson
Processing: Steve Milne



    Pacman Nebula in Cassiopeia, 


            Steve Milne
  • Final
    Pacman Nebula in Cassiopeia, 


            Steve Milne


Description: I wanted a bit more galangal, whilst cutting back on the pandan just a little.

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Sky plot

Sky plot


Pacman Nebula in Cassiopeia, 


            Steve Milne