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Ursa Astronomical Association
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Ursa Astronomical Association

Binocular comet ZTF - 6.2.2023 at 02.30 - 6.2.2023 at 03.17 Lohja, Ojamo Observation number 111932

Visibility I / V

Jari Virtanen, Ursa (Etelä-Suomi)

On Monday 6.2 in the morning, the cloud cover parted for a couple of hours. I stayed in the city to photograph the comet, because in this city on weekdays the street lights do not shine between 00:00 and 4:30. And because the cloud gauze was moving like a raft in the starry sky all the time. However, it took more than half an hour to align the tracking motor, etc., so the clarity was only enough for about 45 minutes of filming. In the post-processing, the free ASTAP program proved to be the most suitable, and the comet was successfully aligned, even though the speed was on the order of 16 arcminutes/hour. The first image shows an 88 x 25 sec stack of the comet. In the timelapse video, the composite images of 6 consecutive images are first stacked on Sequator from about 100 raw images, as I remember, which were assembled after alignment with ASTAP (Blink feature + export) and Lightroom processing into a video with the Da Vinci Resolve 18 free program. The third picture gives you an idea of how bright the sky was in the moonlight even without street lights! Image 1: 2.1 x 1.1 degrees, comet about 1.5 degrees from Capella. Photo2: 6.7 x 4.5 degrees, Nikon D7500, 25 sec, 300mm (effective), Nikkor 70-200 mm f/4, f/4.5, iso 2000, WB 3700K, tracking Slik ECH-630.

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Additional information
  • Observation target
    • Comet
  • Visibility of the comet
    • Binocular comet
  • Name of the observation target
    • C/2022 E3 (ZTF)
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