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M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin
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M101: a night with a lot of cirrus and moonlight

Acquisition type: Electronically-Assisted Astronomy (EAA, e.g. based on a live video feed)

Imaging telescopes or lenses: Home made 400mm F/4 Newtonian

Imaging cameras: Moravian G3 16200

Guiding telescopes or lenses: Home made 400mm F/4 Newtonian

Guiding cameras: Lodestar

Focal reducers: TS N-AGK3 coma corrector

Software: PixInsight  ·  DC-3 Dreams PinPoint Astrometric Engine  ·  FocusMax V4  ·  DC-3 Dreams ACP Observatory Control Software  ·  Diffraction Limited MaximDL 6 Pro  ·  http://www.projectpluto.com/ Guide 9.0

Filters: Astrodon LRGB Tru-Balance E-Series Gen 2 2inch


Dates:May 10, 2020

Frames: 24x600"

Integration: 4.0 hours

Avg. Moon age: 18.13 days

Avg. Moon phase: 87.69%


Astrometry.net job: 3503463

RA center: 14h 3' 12"

DEC center: +54° 22' 4"

Pixel scale: 0.680 arcsec/pixel

Orientation: -179.645 degrees

Field radius: 0.287 degrees


Resolution: 2190x2103

Locations: Beilen Observatory B85, Beilen, Drenthe, Netherlands

Data source: Backyard

Description

>>>>>>> The image above is a crop, please click here to see the full field! <<<<<<<<

6 x 600s each for LRGB, there was a lot of moonlight and cirrus, but the nights are very short now, so this was all I could get... A lot of cirrus passed during the G-frames. Unfortunately not all satellite trails could be removed with only 6 images available for averaging.

Click here to see an AllSky movie of this particular observing night. The telescope can be seen moving at the bottom of the picture, occasionally repositioning to refocus, and making a meridian flip. Between about 00:00h and 01:00h (CEST) you can see two batches of Starlink satellites passing in the lower part of the image.

Comments

Revisions

  • M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin
    Original
  • M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin
    B
  • M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin
    C
  • Final
    M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin
    D

B

Description: A crop of the full image

Uploaded: ...

C

Description: Better processing removed satellite trail.

Uploaded: ...

D

Description: Crop of version C

Uploaded: ...

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M101: a night with a lot of cirrus and moonlight, 



    
        

            Albert van Duin