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Contains:  Helix nebula, NGC 7293
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NGC 7293 - Helix Nebula (Bicolor)

Technical card

Resolution: 2312x2464

Dates:Sept. 27, 2018Sept. 28, 2018Sept. 29, 2018Sept. 30, 2018

Astronomik H-Alpha 6nm CCD: 44x600" -20C bin 1x1
Astronomik OIII 6nm CCD: 37x600" -20C bin 1x1

Integration: 13.5 hours

Darks: ~50

Flats: ~10

Bias: ~200

Avg. Moon age: 18.60 days

Avg. Moon phase: 83.30%

Bortle Dark-Sky Scale: 4.00 job: 2401159

RA center: 337.399 degrees

DEC center: -20.819 degrees

Pixel scale: 0.928 arcsec/pixel

Orientation: 358.133 degrees

Field radius: 0.436 degrees

Locations: Home, Bergisches Land, Germany

Data source: Backyard


I am very happy about this image of the "Eye of God". :-) Viewed from my garden, the maximum height is just 18 degrees above the horizon. I had to photograph exactly over the roofs of my neighbours' houses. Fortunately at the end of September it was still so warm that nobody had the heaters running, so I could take advantage of the very calm air and the great seeing conditions. During four nights I was able to collect 13.5 hours of data.



Frank Breslawski

Sky plot

Sky plot


NGC 7293 - Helix Nebula (Bicolor), 


            Frank Breslawski

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