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Contains:  NGC 884, Double cluster, NGC 869
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The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
The Double Cluster, NGC 869 and NGC 884

The Double Cluster, NGC 869 and NGC 884

Technical card

Resolution: 3600x2400

Dates:Oct. 12, 2019

Frames:Astronomik L2 UV/IR Cut: 32x60" (gain: 50.00) -15C bin 1x1

Integration: 0.5 hours

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 13.51 days

Avg. Moon phase: 98.22%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 19.00

Temperature: 14.00

Astrometry.net job: 2988269

RA center: 35.121 degrees

DEC center: 57.147 degrees

Pixel scale: 0.810 arcsec/pixel

Orientation: 159.594 degrees

Field radius: 0.487 degrees

Data source: Backyard

Description

This was First and Second Light for the Starizona "Night Owl", 0.4X SCT Reducer_corrector, using 38.1mm spacing on a C5.
"Original" un-cropped, first light
"B" : Same as original, cropped
"C": Second Light, where I performed a better collimation and also loosened the clamp collar, which may have been pinching the optics (?). No flat frames or dark frames, so the vignetting is evident but could have been easily corrected.
"D" Same as "C" cropped
E: Same as C, with dark, flats and dark-flats applied
F: Same as E, cropped

Comments

Author

bellavia
Steven Bellavia
License: None (All rights reserved)
1130
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Revisions

  • The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    Original
  • The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    B
  • The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    C
  • The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    D
  • The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    E
  • Final
    The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia
    F

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The Double Cluster, NGC 869 and NGC 884, 





    
        

            Steven Bellavia