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M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf
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M101 v2 81mm, No Filter, 50 minutes, Bortle 9

Getting plate-solving status, please wait...
M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf
Powered byPixInsight

M101 v2 81mm, No Filter, 50 minutes, Bortle 9

Technical card

Imaging telescopes or lenses: Vixen ED81S WT

Imaging cameras: ZWO asi 071mc pro

Mounts: SkyWatcher EQ6R Pro

Guiding telescopes or lenses: ZWO 30mm F4

Guiding cameras: ZWO ASI 174MM Mini

Software: AstroFlat Pro  ·  PixInsight  ·  DXO Optics Photo Lab 4  ·  Luc Coiffier's Deep Sky Stacker 4.2.3 64bit


Dates:April 3, 2021

Frames: 10x300" (50')

Integration: 50'

Avg. Moon age: 21.18 days

Avg. Moon phase: 60.22%


Astrometry.net job: 4394373

RA center: 14h 3' 14"

DEC center: +54° 20' 36"

Pixel scale: 1.054 arcsec/pixel

Orientation: 69.725 degrees

Field radius: 1.255 degrees


Resolution: 7201x4655

Data source: Backyard

Description

In a retake of sorts from my earlier m101 under a duo-band filter in Bortle 9 with a neo-achromat. This was taken about a week earlier without a filter or reducer/flattener off of the Vixen ED 81s wt Doublet APO.

In addition to no filters, taken in Bortle 9, which is somewhat maddening to reduce light pollution, this uses fewer frames with just 10x300 second (gain 90) shots, for a total of 50 minutes. One problem or annoyance I hit was two dust motes that really set themselves in the picture, causing me to crop vs leaving it a completely wide field.

This was processed entirely via PixInsight processing pre-stretch and afterward: Channel Extraction > Linear Fit > Combination > DBE > Background Neutralization > Multiscale Linear Transform > Starmask > Deconvolution/Morphological Transformation, and finally a curves transformation. Outside of PixInsight, this went through Astroflat Pro, then to DxO photo lab for spot brightening, denoise, crop and final adjustment.

Comments

Revisions

  • M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf
    Original
  • Final
    M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf
    B
  • M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf
    C

B

Description: Resized to crop in on the central location and cut off the dust patch that burned into the image.

Uploaded: ...

C

Description: Combining in this data with 2 hours from a 5.5inch refractor, for over 3 hours, processing via PixInsight.

Uploaded: ...

Sky plot

Sky plot

Histogram

M101 v2 81mm, No Filter, 50 minutes, Bortle 9, 



    
        

            psychwolf