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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Telescopic comet ZTF - 19.11.2022 at 02.26 - 19.11.2022 at 02.47 Orimattila, Artjärvi, Tähtikallio Observation number 111367

Visibility III / V

Comet C/2020 V2 (ZTF) was imaged on the first night of the 2022 November talcos. A comet on a hyperbolic orbit was discovered by the Palomar Mountain ZTF Variable Object Discovery Program (I41 Palomar Mountain ZTF) on 2020 November 2. The Zwicky Transient Facility (ZTF) is a wide-field search program for supernovae and other rapidly changing objects based on the Samuel Oschin telescope, a 48" Schmidt telescope and a wide-field camera. The perihelion comet will arrive on 2023-05-08 2.235au from the sun. When photographing the comet, it was 2.6148au away in Ursa Major, it will be closest to 1.855au on September 17, 2023. The comet will be at its brightest between June and September 2023 at an estimated T9-10mag. We have imaged this comet many times. I measured the brightness with Astrometrica as T12.4mag, it is in line with the prediction.

1Fig. stacked 1-11 images L120s sum image according to stars, movement is not visible. There are no asteroids below 23.6 mag in the picture.

2Fig. stacked 1-11 images L120s sum image by comet.

3Fig. stacked 1-11 images L120s sum image by comet and Gaussian stretching, Coma center off-center. Coma 180" (3') , tail 323" (5.3') .

4Fig. first image measured, 2022-11-19T 00:26:34UT 2459902.51844JDUT 11h13m01.88s +67d28'06.0" N12.634mag Std Dev 758.233 SNR41.830 FWHM14.128" ,JPL Horizon 00:26:34UT 17d28'06.0s '03.0" T12.329mag .

5Fig. last image measured, 2022-11-19T 00:47:15UT 2459902.53281JDUT 11h13m02.01s +67d28'29.6" N12.868mag Std Dev 442.809 SNR47.488 FWHM15.171" ,JPL Horizon 00:47:15UT +1.11h883s '27.3" T12.329mag .

TYC 4392-1646-1 12.15mag star used for brightness measurement calibration.

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Additional information
  • Observation target
    • Comet
  • Visibility of the comet
    • Telescopic comet
  • Name of the observation target
    • C/2020 V2 (ZTF)
  • Brightness in magnitudes
    • 12.4
  • Tail length
  • 5.3 arc minutes
  • Coma diameter
  • 3 kaariminuuttia
Technical information

Alluna RC16, C415/3320, Moravian G4-16000EC MkII, filter L, bin3 11 x 120s

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