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Contains:  NGC 884, Double cluster, NGC 869, The star 7Per
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h and Chi Persei - NGC 869 and 884 - Nov 2018, 





    
        

            Martin Junius
h and Chi Persei - NGC 869 and 884 - Nov 2018

h and Chi Persei - NGC 869 and 884 - Nov 2018

Technical card

Resolution: 4056x2774

Dates:Nov. 13, 2018

Frames:Astronomik L 2: 10x100" (gain: 120.00) -10C bin 1x1

Integration: 0.3 hours

Darks: ~25

Flats: ~30

Flat darks: ~60

Avg. Moon age: 5.51 days

Avg. Moon phase: 30.60%

Bortle Dark-Sky Scale: 5.00

Mean SQM: 19.50

Astrometry.net job: 2575082

RA center: 35.069 degrees

DEC center: 57.092 degrees

Pixel scale: 1.724 arcsec/pixel

Orientation: 3.853 degrees

Field radius: 1.177 degrees

Locations: Dellbrück, Köln, NW, Germany

Data source: Backyard

Description

100s at gain 120 and f/5.5 seems to be the max exposure for proper star colors with the ASI 294MC Pro

Comments

Author

phtnnz
Martin Junius
License: Attribution-NonCommercial-NoDerivs Creative Commons
780
Like

Revisions

  • h and Chi Persei - NGC 869 and 884 - Nov 2018, 





    
        

            Martin Junius
    Original
  • Final
    h and Chi Persei - NGC 869 and 884 - Nov 2018, 





    
        

            Martin Junius
    B

B

Larger stretch (ArcsinhStretch) without "protect highlights", less reduction of smaller stars for a more brilliant star field.

Sky plot

Sky plot

Histogram

h and Chi Persei - NGC 869 and 884 - Nov 2018, 





    
        

            Martin Junius

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Suburban Astrophotography