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Contains:  IC 1795, IC1795, NGC 896, NGC896
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Fish Head Nebula/IC 1795, 


            John Kroon
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Fish Head Nebula/IC 1795

Technical card

Dates:Sept. 15, 2019Sept. 20, 2019

ZWO H-alpha 7nm: 45x420" (gain: 139.00) -15C bin 1x1
ZWO OIII 7nm: 4x420" (gain: 139.00) -15C bin 1x1
ZWO SII 7nm: 20x420" (gain: 139.00) -15C bin 1x1

Integration: 8.1 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 18.25 days

Avg. Moon phase: 82.51%

Bortle Dark-Sky Scale: 8.00 job: 2937053

RA center: 2h 28' 12"

DEC center: +62° 6' 42"

Pixel scale: 0.664 arcsec/pixel

Orientation: -6.502 degrees

Field radius: 0.511 degrees

Resolution: 4422x3340

Data source: Backyard



John Kroon
License: None (All rights reserved)


  • Fish Head Nebula/IC 1795, 


            John Kroon
  • Final
    Fish Head Nebula/IC 1795, 


            John Kroon


Description: I ran an Unsharp mask and star reduction on it. Unsharp mask ran at 5 stdev with 0.1 dark deringing and 0.03 light. I ran star reduction with strength 0.27 and then made a new star mask and ran it again at 0.17 strength.

Sky plot

Sky plot


Fish Head Nebula/IC 1795, 


            John Kroon