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

Ursa Astronomical Association

Telescopic comet Faye - 5.12.2021 at 00.48 - 5.12.2021 at 01.09 Orimattila, Artjärvi, Tähtikallio Observation number 103117

Visibility III / V


4P / (Faye) (P / 1843 W1, P / 1850 W1.1910 e) A comet of the Jupiter family was filmed on the second night of the December work. The comet was discovered by the French astronomer Hervé Auguste Étienne Albans Faye (1814-1902) at the Royal Observatory of Paris on November 23, 1843. We last photographed the comet in November and August. The size of the comet's core is 3.54km. When photographing the comet was 0.9416au at a distance and 0.653au at the nearest November 15, 2021. Periheli was September 8, 2021, just inside the Mars orbit.

1Picture The sum of the stack by comet.

2Picture Same stack MaximDL Histogram Specification with Straight-Line stretch. Measured comma 80 "(1.33 ') and tail 425" (7').

3Picture sum view according to the stars L120s 1-11 image stack, motion is displayed. Asteroid (16464) 1990 EV1 17.543mag, motion shown. No other asteroids below 20.4 mag are shown.

4Picture. first image in the series1 L120s measured, 2021-12-04UT 22: 47: 40UT 2459553.44976JDUT 06h54m25.13s + 07d32'11.3 "N14.173mag Std Dev 1177.634 SNR43.383 FWHM6.425", JPL Horizon 22: 47: 40UT 06h54m25.11s + 07d32'12.2 "T13.388m / N15.024mag.

5Picture. last image in the series11 L120s measured, 2021-12-04UT 23: 08: 36UT 2459553.46430JDUT 06h54m24.66s + 07d32'08.2 "N13.845mag Std Dev 1143.590 SNR113.001 FWHM9.054", JPL Horizon 23: 08: 36UT 06h54m24.64s + 07d32'08.9 "T13.135 / N15.378 mag.

TYC 748-1850-1 v.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
    • 4P/Faye
  • Tail length
  • 7 arc minutes
  • Coma diameter
  • 1.33 kaariminuuttia
Technical information

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

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