Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)

Image of the day 11/27/2020

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    Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli
    Powered byPixInsight

    Pickering's Triangle (NGC 6979)

    Image of the day 11/27/2020

    Getting plate-solving status, please wait...
      Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli
      Powered byPixInsight

      Pickering's Triangle (NGC 6979)

      Imaging Telescopes Or Lenses
      Teleskop Service ONTC 10" f4 Newton
      Imaging Cameras
      ZWO ASI1600MM Pro
      Mounts
      Astro-Physics 1100GTO
      Filters
      Astrodon Tru-Balance Gen2 E-Series - R 36mm · Astrodon Narrowband 3nm Ha · Astrodon Tru-Balance Gen2 E-Series - B 36mm · Astrodon Tru-Balance Gen2 E-Series - G 36mm · Astrodon Narrowband 3nm OIII
      Accessories
      QHYCCD OAG-M · Tele Vue Paracorr Type 2 · Pegasus Astro Ultimate Power Box · QHYCCD QHYCFW3-M
      Software
      Astro-Physics Command Center (APCC) Pro Software · Denoise AI · Main Sequence Software Sequence Generator Pro Sequence Generator Pro · Starnet ++ · Photoshop CC · PIXINSIGHT 1.8 · PHD2 Guiding PHD2 v2.6.5
      Guiding Telescopes Or Lenses
      Teleskop Service ONTC 10" f4 Newton
      Guiding Cameras
      Starlight Xpress Ultrastar Mono

      Acquisition details

      Dates:
      July 26, 2020 ·  July 27, 2020 ·  July 28, 2020 ·  July 29, 2020 ·  July 31, 2020
      Frames:
      Astrodon Narrowband 3nm Ha: 90x360" (9h) (gain: 139.00) -15C bin 1x1
      Astrodon Narrowband 3nm OIII: 88x360" (8h 48') (gain: 139.00) -15C bin 1x1
      Astrodon Tru-Balance Gen2 E-Series - B 36mm: 30x60" (30') (gain: 50.00) -15C bin 1x1
      Astrodon Tru-Balance Gen2 E-Series - G 36mm: 30x60" (30') (gain: 50.00) -15C bin 1x1
      Astrodon Tru-Balance Gen2 E-Series - R 36mm: 30x60" (30') (gain: 50.00) -15C bin 1x1
      Integration:
      19h 18'
      Darks:
      50
      Flats:
      20
      Flat darks:
      50
      Bias:
      100
      Avg. Moon age:
      8.62 days
      Avg. Moon phase:
      61.92%
      Bortle Dark-Sky Scale:
      5.00

      RA center: 20h48m11s.242

      DEC center: +31°3930.67

      Pixel scale: 0.685 arcsec/pixel

      Orientation: -2.708 degrees

      Field radius: 0.529 degrees

      More info:Open 

      Resolution: 3276x4488

      Locations: Home Observatory, Schenectady, New York, United States

      Data source: Backyard

      Description

      The chaotic filamentary structure of the Cygnus Loop or Veil Nebula, a supernova remnant in the constellation Cygnus (SH2-103, SNR G074.0-08.6), is in full display in Pickering's Triangle (NGC 6979). The bubble of expanding glowing gas is what is left of a powerful explosion of a progenitor star estimated to be 12-15 times as massive as our Sun. Distance from Earth and the age of this supernova remnant has gone through several refinements over the years and the most recent estimate (Fesen et al. 2018) puts the Cygnus Loop at roughly 2,400 light years from Earth, with a diameter of 130 light years, and an age of roughly 21,000 years.

      Pickering's Triangle was discovered in 1904 by Williamina Fleming, one of the founding members of the Harvard Computers, an all female team hired by the Harvard College Observartory director Edward Charles Pickering. The discovery was made through analysis of photographic plates. While Pickering's Triangle is the most common name for this deep sky object, following the custom at the time to name the object after the senior member of the discovery team, it is also referred to as Fleming's Triangular Wisp. Williamina Fleming is also credited with having discovered the Horsehead Nebula in 1888 from a photographic plate made by astronomer W.H. Pickering, brother of E.C. Pickering.

      Data was processed with Pixinsight (calibration, stacking, and linear processing), Starnet (as a PI plugin), Photoshop (non-linear processing) with Topaz Denoise AI for noise reduction.

      Comments

      Revisions

      • Final
        Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli
        Original
        Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli
        C

      C

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      Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli