Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  Extremely wide field

Image of the day 08/27/2017

    70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
    70 Panel Cygnus Gigapixel APP Mosaic in Ha.
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    70 Panel Cygnus Gigapixel APP Mosaic in Ha.

    Image of the day 08/27/2017

      70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
      70 Panel Cygnus Gigapixel APP Mosaic in Ha.
      Powered byPixInsight

      70 Panel Cygnus Gigapixel APP Mosaic in Ha.

      Equipment

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      Acquisition details

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      Description

      Building further on the 48 (50) panel mosaic i added a row of 16 panels to include the Veil nebula Complex. As a guide i used the Sequence Generator Pro Frame & Mosaic wizard generated output print (included here as "Original revision" with all my pen scribblings showing the approach with the 16 panel later addition.) I added some panels in the overlap with the 50 panel mosaic to assure that the registration would have enough overlap area to work with. The resulting registration RMS error is 0.1 pixel.......

      As a basis for this Mosaic I used 70 seperate stacks (also made with APP) with integration times between 45 and 345 minutes each depending on the object in the frame. An all new mosaic registration algorithm was used that is capable of truly sub pixel perfect registration of these large Mosaics. And the whole process is fully Automatic. The full size version is 29320x35386 pixels giving 1038 Megapixels).

      That is not practicle for web use, but this upload is a 50% reduction and still a 120 Megabyte JPG. (So it still takes some time to load when you select the "full resolution" option here on Astrobin ;-)

      Processing: only histogam stretch and curves adjustments, nothing else.

      The Fits file size of the full version is 3.7 Gb.

      Data collected between may 8 and july 31, 2017.

      Mosaic settings APP with version 1.0521 (Experimental version to test new Algorithm):

      3) Analyse stars

      min size: 4

      Clip Prof: 0.1

      Filter profile: off

      Kappa: 3 (set to detect 3000-5000 stars)

      4) Register

      Pattern recognition: pentagons

      scale start: 5

      scale stop: 10

      use dynamic distortion corr: on

      same camera and optics: off

      Distortion margin: 0.02

      # of overlapping frames: 9

      registration mode: mosaic

      registration model: projective

      6) Integrate

      composition mode: full

      LNC degree: 4)

      LNC it: 3

      enable MBB: on

      MBB%: 5

      No under/overshoot on

      Integrate set scale 1.0

      The Astro Pixel Processor website: https://www.astropixelprocessor.com/

      Featured in Flickr Explore: https://www.flickr.com/photos/kees-scherer/36598821376/

      IOTW (Image of the week) feb 5,2018 Photographing Space:

      https://photographingspace.com/iotw-feb-5-2018/

      Comments

      Revisions

        70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
        Original
        70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
        B
        70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
        C
      • Final
        70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer
        D

      B

      Description: No MBB and no LNC applied to show/judge panel overlaps and star registration.

      Uploaded: ...

      C

      Description: After MBB and LNC have been applied. Histogram stretch and curve adjustments applied.

      Uploaded: ...

      D

      Description: Adjusted curves to show more contrast.

      Uploaded: ...

      Sky plot

      Sky plot

      Histogram

      70 Panel Cygnus Gigapixel APP Mosaic in Ha., Kees Scherer

      In these public groups

      Deep Sky Mosaics
      Cloudy Nights