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

Ursa Astronomical Association

Telescopic comet Faye - 7.8.2021 at 02.35 - 7.8.2021 at 02.56 Orimattila, Artjärvi, Tähtikallio Observation number 100606

Visibility I / V


4P / (Faye) (P / 1843 W1, P / 1850 W1.1910 e) A comet from the Jupiter family was filmed on the first night of the August 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. Otto Wilhelm von Struve said the comet was seen with the naked eye at the end of November. Source Wikipedia
https://en.wikipedia.org/wiki/4P/Faye . Hervé Faye was a member of the Société Astronomique de France (SAF)
as president from 1889 to 1891. Source Wikipedia https://en.wikipedia.org/wiki/Hervé_Faye . The size of the comet's core is 3.54km. When photographing the comet, there was a distance of 1,548au and the nearest October 14, 2021 0.814au. Periheli is September 8, 2021, slightly inside the Mars orbit, with an estimated brightness at n.T11mag.
1 picture Average stack by comet. Tail 195 "and comma 52".
2Picture sum view according to the stars L120s 1-11 stack of images, motion is displayed. No asteroids less than 19.4 mag in the picture.
3Picture. first image in the series1 L120s measured, 2021-08-06UT 23: 34: 51UT 2459433.48253JDUT 03h40m31.93s + 18d25'53.3 "N13.692mag Std Dev 845.511 SNR102.978 FWHM9.027", JPL Horizon 23: 34: 51UT 03h40m31.84s + 18d25'52.8 "T14.069mag.
4Picture. last image in the series11 L120s measured, 2021-08-06UT 23: 55: 49UT 2459433.49709JDUT 03h40m34.41s + 18d25'56.9 "N13.516mag Std Dev 938.142 SNR81.026 FWHM8.899", JPL Horizon 23: 55: 49UT 03h40m34.31s + 18d25'56.2 "T14.069mag.
TYC 1724-928-1 v.12.64mag 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
  • 4 arc minutes
  • Coma diameter
  • 52 kaarisekuntia
Technical information

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

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