Contains:  M 16, Eagle nebula, NGC 6611
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M16 (Ha Oiii bicolor)

Technical card

Resolution: 1819x1223

Dates:July 28, 2018July 30, 2018

Optolong H-alpha 7nm 2": 30x120" (gain: 200.00) 12C bin 1x1
Optolong OIII 12nm 2": 60x60" (gain: 200.00) 12C bin 1x1

Integration: 2.0 hours

Darks: ~10

Avg. Moon age: 16.25 days

Avg. Moon phase: 96.65%

Bortle Dark-Sky Scale: 4.00

Temperature: 25.00 job: 2173934

RA center: 274.707 degrees

DEC center: -13.848 degrees

Pixel scale: 0.880 arcsec/pixel

Orientation: 359.997 degrees

Field radius: 0.268 degrees

Locations: Western Hungary, Páli, Hungary

Data source: Backyard


Another test image, this time with Ha 7nm filter.
Since a few days we have hier really high temperatures, daytime 34-35 C°, in the night 25C° and pretty high humidity. My DIY cooling on the ASI 174mm works hard, but it could not sink the sensor temp below 12 C° :-)

Update : Now I collected additionally 1 hour Oiii data.
Filter Optolong OIII 12nm 2".
This is my very first try to process nb data to a bicolor image :-)



sky-watcher (johny)



My very first bicolor try. Additionally to Ha data, 60 x 1minutes Oiii 12nm

Sky plot

Sky plot


M16 (Ha Oiii  bicolor), 


            sky-watcher (johny)