Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  IC 4996  ·  NGC 6888  ·  The star 34Cyg
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NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky
NGC6888 Crescent nebula
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NGC6888 Crescent nebula

Getting plate-solving status, please wait...
NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky
NGC6888 Crescent nebula
Powered byPixInsight

NGC6888 Crescent nebula

Technical card

Imaging telescopes or lenses: Takahashi FSQ106ED

Imaging cameras: ZWO Optical ASI 071MC-Pro

Mounts: Avalon Instruments Linear Fast Reverse

Guiding telescopes or lenses: Takahashi FSQ106ED

Guiding cameras: Starlight Xpress Lodestar Autoguider X2

Software: PixInsight  ·  Sequence Generator Pro

Accessory: ZWO Optical Off Axis Guider


Dates:July 12, 2018Aug. 15, 2018

Frames:
Astronomik UV-IR block L2: 192x180" (9h 36') (gain: 0.00) -10C bin 1x1
STC Dual Narrow Band: 60x180" (3h) (gain: 200.00) -10C bin 1x1

Integration: 12h 36'

Darks: 61

Flats: 17

Bias: 255

Avg. Moon age: 16.69 days

Avg. Moon phase: 11.24%

Temperature: 14.00


Basic astrometry details

Astrometry.net job: 2220199

RA center: 20h12m53s.5

DEC center: +38°0039

Pixel scale: 1.854 arcsec/pixel

Orientation: 13.682 degrees

Field radius: 1.502 degrees


Resolution: 4871x3204

Locations: Plouezec, Plouezec, Cotes d'armor, France; Mas de Montaigu, Montaigu de Quercy, Tarn-et-Garonne, France

Data source: Backyard

Description

Crescent nebula with a one shot color camera is a real challenge.

Beside the lack of HA, you end up with an image with "an excessive number" of stars.

So it took time to process the data, and i'm not sure i did the right thing to control all of thoses moskitoes in the final image

I will appreciate your comments on this more than 10 hours shot.

On the 2 last versions, i add 3 hours of the data from the STC dual narrowband filter.

Now, with good eyes you can spot the Planetary Nebula (NP G75.5 1.7) discover in 2010 by Dave Jurasevich alias the soap bubble ;)

Comments

Revisions

  • NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky
    Original
  • NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky
    B
  • Final
    NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky
    C

B

Description: Add some H Alpha, OIII with a dual narrowband filter.

Uploaded: ...

C

Description: A better Hα / OIII balance.

Uploaded: ...

Sky plot

Sky plot

Histogram

NGC6888 Crescent nebula, 



    
        

            Hugues Obolonsky

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