Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 94  ·  NGC 4736

Image of the day 11/18/2020

Getting plate-solving status, please wait...
    M94 Galaxy, 



    
        

            Jean-Baptiste Auroux
    Powered byPixInsight

    Image of the day 11/18/2020

    Getting plate-solving status, please wait...
      M94 Galaxy, 



    
        

            Jean-Baptiste Auroux
      Powered byPixInsight

      Acquisition details

      Dates:
      May 21, 2020 ·  May 23, 2020 ·  May 24, 2020 ·  May 25, 2020
      Frames:
      Astronomik B 1.25": 20×180(1h) -15°C bin 2×2
      Astronomik G 1.25": 20×180(1h) -15°C
      Astronomik Ha 6nm: 12×600(2h) -15°C bin 1×1
      Astronomik L 1.25": 15×180(45′) -15°C bin 1×1
      Astronomik L 1.25": 60×600(10h) -15°C bin 1×1
      Astronomik R 1.25": 20×180(1h) -15°C bin 2×2
      Integration:
      15h 45′
      Darks:
      64
      Flats:
      12
      Bias:
      101
      Avg. Moon age:
      8.35 days
      Avg. Moon phase:
      3.23%
      Bortle Dark-Sky Scale:
      4.00

      RA center: 12h50m53s.11

      DEC center: +41°0709.2

      Pixel scale: 1.148 arcsec/pixel

      Orientation: 13.522 degrees

      Field radius: 0.550 degrees

      More info:Open 

      Resolution: 2700x2147

      File size: 24.0 MB

      Locations: Charente-Maritime, Charente-Maritime, Charente-Maritime, France

      Data source: Backyard

      Description

      I tried for the first time the "trendy" software "Topaz sharpen" for this image ; as many users do so now for their astro images.

      The process was only applied on the inner core of the galaxy, and with many precautions (mask, low % of blend with the original… ) and rigorous verification that no virtual detail is created during the process. In fact, it was used more like the "sharpen" tool of PS ; which can surely leads to the same result but with many iterations…

      For this image, most of the detail come from classic deconvolution and HDR processing on Pixinsight ; Topaz was only useful to quickly give a "sharpen" aspect to the core of the galaxy.

      I think that used in that way, and with such precautions, it can be an interesting tool.

      JB

      Comments

      Revisions

      • Final
        M94 Galaxy, 



    
        

            Jean-Baptiste Auroux
        Original
        M94 Galaxy, 



    
        

            Jean-Baptiste Auroux
        B

      B

      Description: AAPOD² celebration ! (11/28/2020 - https://www.aapod2.com/blog/galaxy-m94).

      Uploaded: ...

      Sky plot

      Sky plot

      Histogram

      M94 Galaxy, 



    
        

            Jean-Baptiste Auroux