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Ursa Astronomical Association

Telescopic comet Schwassmann-Wachmann - 6.11.2021 at 21.43 - 6.11.2021 at 22.04 Orimattila, Artjärvi, Tähtikallio Observation number 102471

Visibility I / V

29P / (Schwassmann-Wachmann) The periodic comet of the Jupiter family was filmed on the second night of the November 2021 campaign. Outbreaks sometimes occur in a comet, which is why we have tried to shoot several times. The comet's orbit is outside Jupiter's orbit and will be close to Jupiter 2037 less than 1au away. Discharges may increase the brightness by 1-5 mag. The size of the large comet's core is 60.4km. As of filming, the comet was 5,064 miles away, the closest 4.82au on November 6, 2020.

1Picture The sum of the stack by comet. In the direction of 3 o'clock a separate protrusion and a small tail pointing in the direction of 7 o'clock are shown. A large coma is visible due to recent eruptions.

2Picture Same stack MaximDL Histogram Specification with Rayleigh stretch. Measured wide comma 280 ".

3Picture sum view according to the stars L120s 1-11 image stack, motion is displayed. Asteroid (41919) 2000 WW156 18.862mag, motion shown. Asteroid (121546) 1999 VU11 19.478mag, motion is shown .Asteroid (192997) 2000 DP109 19.995mag, there are 3 possible objects in the asteroid that are not shown on the comparison map? Asteroid 2018 AJ4 20.131mag, fast motion visible but weak. No less than 20.6mag asteroids in the picture.

4Picture. first image in the series1 L120s measured, 2021-11-06UT 19: 43: 01UT 2459525.32570JDUT 04h49m40.17s + 32d16'10.8 "N16.244mag Std Dev 176.406 SNR35.485 FWHM6.240", JPL Horizon 19: 43: 01UT 04h49m40.11s + 32d16'10.2 "T15.641 mag.

5Picture. last image in the series11 L120s measured, 2021-11-06UT 20: 03: 55UT 2459525.33605JDUT 04h49m39.77s + 32d16'09.9 "N16.215mag Std Dev 188.666 SNR32.666 FWHM6.023", JPL Horizon 20: 03: 55UT 04h49m39.87s + 32d16'10.2 "T15.601 core.

TYC 2391-796-1 v.12.28mag stars used to calibrate brightness measurement.

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Additional information
  • Observation target
    • Comet
  • Title for the comet
    • Telescopic comet
  • Name of the observation target
    • 29P/Schwassmann-Wachmann
  • Coma diameter
  • 4.6 kaariminuuttia
Technical information

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

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