Contact information

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

Ursa Astronomical Association

Telescopic comet PANSTARRS - 10.4.2021 at 23.51 - 11.4.2021 at 00.12 Orimattila, Artjärvi, Tähtikallio Observation number 97982

Visibility III / V


The comet C / 2017 K2 (PANSTARRS) was filmed on the second night of the April 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 two months ago. The comet is record-breaking, already 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 photographing the comet was 6,500au away, the closest it will be
1.819au July 14, 2022.
1Picture. stacked summary image according to the stars, motion is not displayed. No asteroids less than 24.0 mag in the picture.
2Picture. Stacked Averace (average) comet, stretched with MaximDL Histogram Specification Straight Line filter, comma 45 "and tail at 17" to 107 ".
3Picture. first picture measured, 2021-04-10T 20: 51: 19UT 2459315.36896JDUT 18h27m18.21s + 40d18'05.9 "N16.168mag Std Dev 203.409 SNR69.089 FWHM6.408", JPL Horizon 20: 51: 19UT 18h27m18.24s + 40d18 '05 .7 "T15.007mag.
4Picture. last image measured, 2021-04-10UT 21: 12: 12UT 2459315.38347JDUT 18h27m18.13s + 40d18'10.9 "N16.142mag Std Dev 251.932 SNR74.597 FWHM6.731", JPL Horizon 21: 12: 12UT 18h27m18.11s + 40d18 '10 .5 "T15.007magmag. TYC 3108-522-1 used for brightness measurement calibration
12.36mag stars.



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Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • C/2017 K2 (PANSTARRS)
    • Keskitaso
  • Tail length
  • 107 arc seconds
  • Coma diameter
  • 45 kaarisekuntia
  • Weather
    • Erittäin hyvä säätila.
  • Title for the comet
    • Telescopic comet
Technical information

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

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