Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Crescent nebula  ·  NGC 6888
Croissant pur beurre, 



    
        

            Laurent Fournet
Croissant pur beurre
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Croissant pur beurre

Technical card

Imaging telescopes or lenses: Custom 20" Newton f/4.95

Imaging cameras: SBIG STL-11000

Mounts: Custom Fork

Guiding telescopes or lenses: Custom 20" Newton f/4.95

Guiding cameras: SBIG STL-11000

Focal reducers: ASA Wynne 3" x0.95

Software: photoshop  ·  Maxim DL  ·  CCD Inspector  ·  CCDSoft

Filters: Ha


Dates:Sept. 21, 2011

Frames:Ha: 29x300" (2h 25') -10C bin 1x1

Integration: 2h 25'

Darks: 10

Bias: 10

Avg. Moon age: 23.05 days

Avg. Moon phase: 40.43%

Bortle Dark-Sky Scale: 3.00

Mean FWHM: 3.00


Basic astrometry details

Astrometry.net job: 146196

RA center: 20h12m20s.4

DEC center: +38°2009

Pixel scale: 0.775 arcsec/pixel

Orientation: -175.332 degrees

Field radius: 0.367 degrees


Resolution: 620x521

Comments

Sky plot

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Histogram

Croissant pur beurre, 



    
        

            Laurent Fournet