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Contains:  NGC 2403
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NGC 2403 Galaxy, 


            Michael Timm
NGC 2403 Galaxy

NGC 2403 Galaxy

Technical card

Resolution: 7136x4951

Dates:Feb. 15, 2019

Frames: 351x60" (gain: 120.00) -20C bin 1x1

Integration: 5.8 hours

Darks: ~105

Flats: ~50

Flat darks: ~50

Bias: ~250

Avg. Moon age: 10.03 days

Avg. Moon phase: 76.71%

Bortle Dark-Sky Scale: 4.00

Temperature: 2.00 job: 2528060

RA center: 114.216 degrees

DEC center: 65.605 degrees

Pixel scale: 0.403 arcsec/pixel

Orientation: 95.133 degrees

Field radius: 0.487 degrees

Locations: Backyard, Vechelde, Niedersachsen, Germany

Data source: Backyard


I have really a strong issue with noise. This is NGC 2403, a wonderful galaxy in the M 81-group. The image was taken under a nearly 80 % moon and therefor lacks details. But the annoying noise is lousy, i dont know how to get rid of it. Tonight i will try imaging with the native focal length, maybe the reducer has something to with it (but i doubt it).

[Edit]: Image 'B' shows the noise blob by using the ExtractWaveletLayer-scipt in PI.

Due to high clouds i could not image last night, so i could not check if the CCDT67 is the problem.



Michael Timm
License: None (All rights reserved)


  • Final
    NGC 2403 Galaxy, 


            Michael Timm
  • NGC 2403 Galaxy, 


            Michael Timm


The annoying 'noise blob' in the center. Can be better viewed in my previous image of M81.

Sky plot

Sky plot


NGC 2403 Galaxy, 


            Michael Timm