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Contains:  M 82, Bode's nebulae, NGC 3034
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M 82 Cigar Galaxy, 





    
        

            Michael Timm
M 82 Cigar Galaxy

M 82 Cigar Galaxy

Technical card

Resolution: 7946x5293

Dates:Feb. 27, 2019

Frames: 98x120" (gain: 120.00) -20C bin 1x1

Integration: 3.3 hours

Darks: ~173

Flats: ~50

Flat darks: ~50

Avg. Moon age: 23.09 days

Avg. Moon phase: 40.04%

Bortle Dark-Sky Scale: 4.00

Temperature: 5.00

Astrometry.net job: 2624132

RA center: 148.969 degrees

DEC center: 69.684 degrees

Pixel scale: 0.299 arcsec/pixel

Orientation: 92.057 degrees

Field radius: 0.396 degrees

Locations: Backyard, Vechelde, Niedersachsen, Germany

Data source: Backyard

Description

Messier 82 is a very active starburst galaxy not so far away. I had hoped to image the gas leaking out of M82, but for this goal my total integration time is too low.

Well, i had several problems the evening i took this image: First, guiding did not work anymore after the meridian passthrough. I dont know what happened, but i could not get it started again. I had imaged more than 3 hours before with exceptional guiding, so i was okay with it. But the next day i saw that all images where out of focus. You can see it at the spikes of the topleft bright star when zooming in. I don't know how this could have happened, because since i started using a bahtinov mask i had never ever problems in holding focus the whole night. The only thing i can imagine is that the focuser moved a bit after i focused with the bahtinov - or i had a "Knick in der Optik" while using the bahtinov mask like a german saying says...

So i think the result is fairly okay regarding the problems i had.

[Edit]: Ah, and there is no annyoing noise-blob like in my last pictures. So maybe it was the moon or the reducer or a combination of both, i think.

And the image was taken after the party of my fathers 70th birthday. Gratulations again :-)

[Edit2]: I totally reprocessed the image without bias and with new darks. I am not sure if this new version is an improvement, but without any doubt it helps to understand what i am doing in PI :-)

Comments

Author

khrrugh
Michael Timm
License: None (All rights reserved)
1270
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Revisions

  • M 82 Cigar Galaxy, 





    
        

            Michael Timm
    Original
  • Final
    M 82 Cigar Galaxy, 





    
        

            Michael Timm
    B

B

Reprocessed without bias and new darks.

Sky plot

Sky plot

Histogram

M 82 Cigar Galaxy, 





    
        

            Michael Timm