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Image of the day 05/25/2023

Getting plate-solving status, please wait...
    M76, the Butterfly Nebula, 



    
        

            Wei-Hao Wang
    Powered byPixInsight

    M76, the Butterfly Nebula

    Image of the day 05/25/2023

    Getting plate-solving status, please wait...
      M76, the Butterfly Nebula, 



    
        

            Wei-Hao Wang
      Powered byPixInsight

      M76, the Butterfly Nebula

      Acquisition details

      Dates:
      Nov. 7, 2022 ·  Nov. 9, 2022 ·  Nov. 13, 2022 ·  Nov. 14, 2022 ·  Nov. 15, 2022 ·  Nov. 16, 2022
      Frames:
      Astrodon Cousins R 50x50 mm: 300×9(45′)
      Astrodon Johnson B 50x50 mm: 300×12(1h)
      Astrodon Johnson V 50x50 mm: 300×9(45′)
      Astronomik OIII CCD 12nm 50x50 mm: 600×15(2h 30′)
      Astronomik OIII CCD 12nm 50x50 mm: 600×20(3h 20′)
      H-alpha: 600×11(1h 50′)
      H-alpha: 600×27(4h 30′)
      H-alpha: 600×4(40′)
      Integration:
      15h 20′
      Avg. Moon age:
      18.77 days
      Avg. Moon phase:
      75.81%

      RA center: 01h42m18s.512

      DEC center: +51°3442.14

      Pixel scale: 0.359 arcsec/pixel

      Orientation: -0.396 degrees

      Field radius: 0.211 degrees

      WCS transformation: thin plate spline

      More info:Open 

      Resolution: 3000x3000

      File size: 1.5 MB

      Locations: Yushan National Park (Taiwan), Chia-Yi, Taiwan

      Data source: Own remote observatory

      Remote source: Non-commercial independent facility

      Description

      HaOIIIRGB composition. The nebula mainly comes from the Ha and OIII narrow-band images, but contains small contributions from the RGB broad-band images. The stars only come from RGB. Images stacked with 2x drizzle, to take advantage of good seeing (1.0 to 1.1 arcsec for OIII), and then 50% cropped. The uploaded version is further 75% down-sampled.

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      M76, the Butterfly Nebula, 



    
        

            Wei-Hao Wang

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