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

Ursa Astronomical Association

Telescopic comet Borrelly - 26.3.2022 at 23.52 - 27.3.2022 at 00.13 Orimattila, Artjärvi, Tähtikallio Observation number 106309

Visibility III / V


The 19P / Borrelly comet was filmed on the second night of March 2022. The comet was discovered by the French astronomer Alphonse Louis Nicolas Borrelly on December 28, 1904 at the Besancon Observatory (016 Besancon). Alphonse Borrelly has found comets C / 1873 Q1 (Borrelly), C / 1877 C1 (Borrelly), C / 1877 G2 (Swift-Borrelly-Block), C / 1889 X1 (Borrelly), 19P / Borrelly, C / 1909 L1 ( Borrelly-Daniel) and 18 asteroids. Source Wikipedia https://en.wikipedia.org/wiki/Alphonse_Borrelly . The Deep Space 1 spacecraft visited a 19P / Borrelly comet in 2001 at a distance of 3400km and obtained images from its core. Source Wikipedia https://en.wikipedia.org/wiki/Deep_Space_1 . In Perihel, the comet was on February 1, 2022. When filming, the comet was 1.6385au away, the closest it was 1.17au on December 11, 2021. We also photographed the comet in February 2022.

1Picture. stacked 1-11 images L120s sum of the stars, motion is shown. No asteroids less than 20.9 mag in the picture.

2Picture. Stacked in Figure 1-11, the sum of the L120s according to the comet shows the evolution of the weather in the streaks.

3Picture. Same stack MaximDL Histogram Specification with Gaussian stretching. The central clearing of Koma is displayed. Tail 3.6 'and comma 1.2'.

4Picture. first image measured, 2022-03-26T 20: 52: 23UT 2459665.36971JDUT 04h04m58.93s + 34d57'33.2 "N14.063mag Std Dev 876,543 SNR68.960 FWHM6.879", JPL Horizon '32 .1 "T13.192 / N16.690 mag.

5Picture. last picture measured, 2022-03-26UT 21: 13: 19UT 2459665.38424JDUT 04h05m02.11s + 34d57'52.9 "N14.168mag Std Dev 748.429 SNR74.601 FWHM8.726", JPL Horizon 21: 13: 19UT 04h05m01.96s + 34d57 '51 .4 "TT13.192 / N16.690 mag.

TYC 2366-2881-1 12.07mag 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
    • 19P/ Borrelly
  • Tail length
  • 3.6 arc minutes
  • Coma diameter
  • 1.2 kaariminuuttia
Technical information

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

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