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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Telescopic comet ZTF - 3.9.2022 at 23.09 - 3.9.2022 at 23.30 Orimattila, Artjärvi, Tähtikallio Observation number 110898

Visibility IV / V

C/2022 E3 (ZTF) A comet on a hyperbolic orbit was discovered by the Palomar Mountain ZTF variable object search program (I41 Palomar Mountain ZTF) on 2022 March 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 comet will enter perihelion on January 12, 2023. 1.11au from the sun. When filming, the comet was 2.1944au away in Lyra, the closest it will be 0.29au on February 2, 2023. The comet will be at its brightest at the end of January 2023, clearly a target for binoculars (perhaps even with the naked eye). We have photographed this before. Toni photographed the comet and Kari as a sensor.

1Fig. stacked 1-11 images L120s sum image according to stars, movement is visible. There are no asteroids below 24.0 mag in the picture.

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

3Fig. Same stack MaximDL Histogram Specification with Gaussian stretching. Tail 360" (6') and comma 20". The core of the coma appears off-center.

4Fig. first image measured, 2022-09-03T 20:09:28UT 2459826.33990JDUT 16h21m42.72s +32d13'10.3" N13.769mag Std Dev 1811.569 SNR88.537 FWHM7.962" ,JPL Horizon 20:09:28UT 42d1621s +32d13'10.3" '10.6" T13.510/N15.255mag .

5Fig. last image measured, 2022-09-03 20:30:09UT 2459826.35427JDUT 16h21m41.47s +32d13'01.7" N13.817mag Std Dev 1892.776 SNR77.796 FWHM7.049" ,JPL Horizon 20:30:09UT42d16h21s +32d13'01.7" '02.0" T13.510/N15.255magmag .

TYC 2580-500-1 12.23mag star used for brightness measurement calibration.

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Additional information
  • Observation target
    • Comet
  • Title for the comet
    • Telescopic comet
  • Name of the observation target
    • C/2022 E3 (ZTF)
  • Tail length
  • 6 arc minutes
  • Coma diameter
  • 20 kaarisekuntia
Technical information

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

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