Contact information

Ursa Astronomical Association
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00130 Helsinki

Ursa Astronomical Association

Binocular comet ZTF - 21.1.2023 at 02.05 - 21.1.2023 at 06.00 Orimattila, Artjärvi, Viestikallio Observation number 111536

Visibility III / V

Jorma Ryske, Etelä-Suomen kosmol. seura

Comet C/2022 E3 (ZTF) is quite close to Earth at 0.48au / 72 million km, and the comet is beginning to fill the cell of the longer focal length imaging equipment. Attached is a plate-corrected image where the size of the image field is 36'x28', corresponding to an image field of 750,000 km X 590,000 km at the comet's distance, the grid spacing in the direction of RA and Dec is approximately 210,000 km.

Picture 1) Clear filter, 4x1min=4 minute exposure. A broad particle tail and two ion tails going in slightly different PA directions stand out. The ion tail in the direction of PA 301deg is mainly CO+ ions based on the observations of professional researchers.

Figure 2) R filter, 660nm/80nm. 10x2min exposure, inverted. The ion tails stand out weakly, the ions visible in the R region are possibly H2O+ ions

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Additional information
  • Observation target
    • Comet
  • Visibility of the comet
    • Binocular comet
  • Name of the observation target
    • C/2022 E3 (ZTF)
  • Brightness in magnitudes
    • 6
  • Tail length
  • 1 degrees
  • Coma diameter
  • 14 kaariminuuttia
  • Weather
    • -2C

Technical information

TS 305/1200mm Newton, TS KomakorrF4, QSI690/ICX814, filter Baader Clear, Astrodon R, mount CEM60, Viestikallio remote observatory. FoV 36' x 28'. North ~ up, east left.

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