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Contains:  NGC 2683
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NGC 2683 Ufo Galaxy, 


            Michael Timm
NGC 2683 Ufo Galaxy

NGC 2683 Ufo Galaxy

Technical card

Resolution: 7637x5084

Dates:March 31, 2019

Frames: 128x120" (gain: 120.00) -20C bin 1x1

Integration: 4.3 hours

Darks: ~173

Flats: ~50

Flat darks: ~50

Avg. Moon age: 25.12 days

Avg. Moon phase: 20.45%

Bortle Dark-Sky Scale: 4.00

Temperature: 3.00 job: 2621569

RA center: 133.169 degrees

DEC center: 33.420 degrees

Pixel scale: 0.299 arcsec/pixel

Orientation: 272.573 degrees

Field radius: 0.381 degrees

Locations: Backyard, Vechelde, Niedersachsen, Germany

Data source: Backyard


This is NGC 2683, the ufo-galaxy. The image is a bit blurred due to guiding problems which i am currently working on. This time i didn't use any bias frames (thanks to Zdenek Vojc via Michael Feigenbaum for this hint) and acquired totally new darks using the refrigerator-method (which is the best method to take darks i have used so far - totally stressless - thanks to Kevin Morefield for describing this in the forum). The resulting stacked image was a lot clearer and cleaner than the ones i stacked before. And i found flats from february which contained no annoying-noise-blob (see my previously uploaded images). The RC is very focus-stable so i could use these flats without any problems. Of course i check the focus each night, but mostly there is no need to touch the focuser :-) It means that the annoying-noise-blob-problem is still not solved, but for my latest images it should be fine.

I will reprocess my latest images with this new knowledge and new calibration frames and method. I hope there will be an visible improvement.



Michael Timm
License: None (All rights reserved)

Sky plot

Sky plot


NGC 2683 Ufo Galaxy, 


            Michael Timm