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

Ursa Astronomical Association

Telescopic comet Palomar - 3.9.2021 at 22.13 - 3.9.2021 at 22.35 Orimattila, Artjärvi, Tähtikallio Observation number 101075

Visibility II / V


C / 2019 O3 (Palomar) (2019 O3) A distant comet was filmed on the first night of the September 2021 work. The comet was discovered by a Zwicky Transient Facility camera with a 48 "/ F2.4 Osch Schmidt telescope in Palomar (Palomarin 48") on July 26, 2019 as an asteroid. The first observations were later noted as early as (I41-Palomar Mountain-ZTF) on 14 May 2021. The Zwicky Transient Facility camera was installed in the old 48 "2017 and consists of 16X 6144 × 6160 CCD pixels (606 Mpix). Source Wikipedia https://en.wikipedia.org/wiki/Samuel_Oschin_telescope . The comet asteroid was identified in May 2020 at 3.6m Canada-France-Hawaii The comet was in its perihelion in the spring of 2021-03-08.29706 8.8194977au The comet is on a hyperbolic orbit and is now leaving, no return is known.
1Picture. Summary image 1-11 stack according to the stars, the movement is shown. No asteroids below 24.0 mag.
2Picture. Average 1-11 stack by comet. Tail 37 ", Coma 8" measured.
3Picture. first image in the series1 L120s measured, 2021-09-03UT 19: 13: 29UT 2459461.30103JDUT 18h26m35.13s + 50d42'08.4 "N17.114 / T15.907mag Std Dev 129.009 SNR23.622 FWHM4.247", JPL Horizon 19:13: 29UT 18h26m35.20s + 50d42'07.4 "T17.328 / N17.625mag.
4Picture. last image in the series11 L120s measured, 2021-09-03UT 19: 34: 24UT 2459461.31555JDUT 18h26m34.80s + 50d42'05.6 "N16.905 / T15.747mag Std Dev 53.505 SNR5.260 FWHM2.785", JPL Horizon 19:34: 24UT 01h46m37.27s + 19d52'36.3 "T17.328 / N15.625 mag. Used for calibration of brightness measurement
TYC 3538-141-1 v.12.19mag stars.



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Additional information
  • Observation target
    • Comet
  • Title for the comet
    • Telescopic comet
  • Name of the observation target
    • C/2019 O3 (Palomar)
  • Brightness in magnitudes
    • 15.8
  • Tail length
  • 37 arc seconds
  • Coma diameter
  • 8 kaarisekuntia
Technical information

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

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