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Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Telescopic comet PANSTARRS - 4.9.2021 at 22.08 - 4.9.2021 at 22.29 Orimattila, Artjärvi, Tähtikallio Observation number 101464

Visibility III / V


The comet C / 2017 K2 (PANSTARRS) was filmed on the second night of the September 2021 campaign. A comet on a hyperbolic orbit was discovered by PANSTARRS (PS1) on May 21, 2017 at a distance of 16.09au. The comet will come to Perihel in December 2022. We have described this comet several times already. Last six months ago. The comet was a record when it brightened very far from the sun, it has been compared to the Hale-Bopp comet in 1997, source Wikipedia https://en.wikipedia.org/wiki/C/2017_K2 . When filming the comet was 5,389au away, the closest it will be 1,819au on July 14, 2022.

1Picture. stacked 1-11 images L120s summary image according to the stars, the movement is shown. No asteroids less than 24.0 mag in the picture.

2Picture. Stacked 1-11 images L120s summary image by comet.

3Picture. first picture measured, 2021-09-04T 19: 08: 06UT 2459462.29729JDUT 16h56m52.34s + 31d50'36.1 "N14.73mag Std Dev 546.990 SNR144.959 FWHM7.516", JPL Horizon 19: 08: 06UT 16h56m52.27s + 31d50 '36 .6 "T14.331mag.

4Picture. last image measured, 2021-09-04UT 19: 29: 00UT 2459462.31180JDUT 16h56m52.28s + 31d50'25.6 "N14.7502mag Std Dev 525.324 SNR179.113 FWHM8.306", JPL Horizon 19: 29: 00UT 19h56m52.20s + 31d50 '25 .6 "T14.331 core.

TYC 2589-84-1 11.63mag 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
    • C/2017 K2 (PANSTARRS)
  • Seeing
    • Average
Technical information

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

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