Hemisphere:  Northern  ·  Constellation: Coma Berenices (Com)  ·  Contains:  IC 783  ·  IC783  ·  M 100  ·  M100  ·  NGC 4312  ·  NGC 4321  ·  NGC 4323  ·  NGC 4328  ·  NGC4312  ·  NGC4322  ·  NGC4328

Image of the day 05/08/2021

Getting plate-solving status, please wait...
    M100 | A Grand Design Spiral with Inner Star Forming Ring, 



    
        

            Kevin Morefield
    Powered byPixInsight

    M100 | A Grand Design Spiral with Inner Star Forming Ring

    Image of the day 05/08/2021

    Getting plate-solving status, please wait...
      M100 | A Grand Design Spiral with Inner Star Forming Ring, 



    
        

            Kevin Morefield
      Powered byPixInsight

      M100 | A Grand Design Spiral with Inner Star Forming Ring

      Imaging telescopes or lenses: Planewave CDK14

      Imaging cameras: QHYCCD QHY600M

      Mounts: Planewave L-350

      Guiding telescopes or lenses: Planewave CDK14

      Guiding cameras: Starlight Express UltraStar Mono

      Software: Adobe Inc Photoshop CC  ·  CCDWARE CCD Autopilot 5  ·  PixInsight

      Filters: Astrodon Blue  ·  Green  ·  Red  ·  Luminance


      Dates:May 1, 2021

      Frames:
      Astrodon Blue: 33x300" (2h 45') (gain: 56.00) -10C bin 2x2
      Green: 14x300" (1h 10') (gain: 56.00) -10C bin 2x2
      Green: 6x600" (1h) (gain: 56.00) -10C bin 2x2
      Luminance: 58x300" (4h 50') (gain: 56.00) -10C bin 2x2
      Red: 30x300" (2h 30') (gain: 56.00) -10C bin 2x2

      Integration: 12h 15'

      Darks: ~20

      Flats: ~20

      Bias: ~125

      Avg. Moon age: 19.73 days

      Avg. Moon phase: 74.62%

      Bortle Dark-Sky Scale: 3.00


      Astrometry.net job: 4463690

      RA center: 12h 22' 25"

      DEC center: +15° 42' 51"

      Pixel scale: 0.608 arcsec/pixel

      Orientation: 100.130 degrees

      Field radius: 0.395 degrees


      Resolution: 3730x2809

      Data source: Own remote observatory

      Remote source: Sierra Remote Observatories

      Description

      M100 is a smallish Messier Galaxy, 7.5' at its widest. But it makes up for its size with a delicate spiral morphology. The most interesting detail is a very bright blue inner ring where stars are being birthed in large numbers. This ring required combining a separate, more limited stretch to prevent it saturating.

      This galaxy and its companions, NGC4328 and NGC 4323, are a part of the Virgo cluster. Zooming in, it would seem that half of the objects in the FOV are stars and half are galaxies.

      I like to imagine this galaxy and M31 switching places. What a beautiful sight that would make using binoculars.

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      M100 | A Grand Design Spiral with Inner Star Forming Ring, 



    
        

            Kevin Morefield