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Celestial hemisphere:  Northern  ·  Constellation: Leo (Leo)  ·  Contains:  Solar system body or event

Image of the day 09/15/2023

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    Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023, Dan Bartlett
    Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023
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    Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023

    Image of the day 09/15/2023

    Getting plate-solving status, please wait...
      Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023, Dan Bartlett
      Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023
      Powered byPixInsight

      Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023

      Equipment

      Imaging Telescopes Or Lenses
      Celestron RASA 11"
      Imaging Cameras
      ZWO ASI6200MC Pro
      Mounts
      10Micron GM1000 HPS
      Software
      Main Sequence Software Sequence Generator Pro (SGP) · Pleiades Astrophoto PixInsight

      Acquisition details

      Dates:
      Sept. 7, 2023
      Frames:
      37×30″(18′ 30″)
      Integration:
      18′ 30″
      Avg. Moon age:
      22.69 days
      Avg. Moon phase:
      44.27%
      Basic astrometry details

      Astrometry.net job: 8428239

      RA center: 09h50m18s.10

      DEC center: +24°17′34″

      Pixel scale: 2.520 arcsec/pixel

      Orientation: 12.328 degrees

      Field radius: 1.902 degrees

      Find images in the same area

      Resolution: 4456x3108

      File size: 22.1 MB

      Locations: June Lake, California, USA, June Lake, CA, United States

      Data source: Traveller

      Description

      Centered at 04:49am, Comet Nishimura has just cleared the trees on the mountain ridge.  Although only 4 degrees off the imaginary 0 degrees horizon it was spectacular to watch a thin spike like tail rise first (before the comet's central condensation) on the computer screen.  I continued to take 30 second sub frames and managed to stack 37 x30 secs before the morning twilight ruined the rest.  The comet had a max altitude of 9.5 degrees when I finished shooting.  Last quarter moon was also present to make things challenging. But the exceptionally clear transparent morning made imaging better than expected in the Mountain thin air.  Star sizes of course were bloated due to the atmospheric dispersion.

      The comet and much of its tail were readily viewable in a pair of 18x 50s image Stabilizing binos, with its tail extending upward in most of the binocular field of view.

      Comments

      Revisions

        Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023, Dan Bartlett
        Original
      • Final
        Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023, Dan Bartlett
        B

      Sky plot

      Sky plot

      Histogram

      Now That's a Comet...C/2023 P1 Nishimura Sept 7, 2023, Dan Bartlett

      In these public groups

      Comets Imaging
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