Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)

Image of the day 11/27/2020

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    Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli
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    Pickering's Triangle (NGC 6979)

    Imaging telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

    Imaging cameras: ZWO ASI1600MM Pro

    Mounts: Astro-Physics 1100GTO

    Guiding telescopes or lenses: Teleskop Service ONTC 10" f4 Newton

    Guiding cameras: Starlight Xpress Ultrastar Mono

    Software: Topaz Labs Denoise AI  ·  Main Sequence Software Sequence Generator Pro Sequence Generator Pro  ·  Starnet ++  ·  Astro-Physics Command Center (APCC) Pro Software  ·  Photoshop CC  ·  PIXINSIGHT 1.8  ·  PHD2 Guiding PHD2 v2.6.5

    Filters: Astrodon Narrowband 3nm Ha  ·  Astrodon Tru-Balance Gen2 E-Series - B 36mm  ·  Astrodon Tru-Balance Gen2 E-Series - G 36mm  ·  Astrodon Tru-Balance Gen2 E-Series - R 36mm  ·  Astrodon Narrowband 3nm OIII

    Accessory: QHYCCD OAG-M  ·  Tele Vue Paracorr Type 2  ·  Pegasus Astro Ultimate Power Box  ·  QHYCCD QHYCFW3-M


    Dates:July 26, 2020July 27, 2020July 28, 2020July 29, 2020July 31, 2020

    Frames:
    Astrodon Tru-Balance Gen2 E-Series - B 36mm: 30x60" (gain: 50.00) -15C bin 1x1
    Astrodon Tru-Balance Gen2 E-Series - G 36mm: 30x60" (gain: 50.00) -15C bin 1x1
    Astrodon Tru-Balance Gen2 E-Series - R 36mm: 30x60" (gain: 50.00) -15C bin 1x1
    Astrodon Narrowband 3nm Ha: 90x360" (gain: 139.00) -15C bin 1x1
    Astrodon Narrowband 3nm OIII: 88x360" (gain: 139.00) -15C bin 1x1

    Integration: 19.3 hours

    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


    Astrometry.net job: 4016339

    RA center: 20h 48' 11"

    DEC center: +31° 39' 30"

    Pixel scale: 0.685 arcsec/pixel

    Orientation: -2.708 degrees

    Field radius: 0.529 degrees


    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.

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      Pickering's Triangle (NGC 6979), 



    
        

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



    
        

            Luca Marinelli
      C

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    Pickering's Triangle (NGC 6979), 



    
        

            Luca Marinelli