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Analysis of Comet Apparitions


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Summary of the brighter comets in 2021


The following table gives a summary of the comets brighter than 16 mag, which were observed by members of the German Comet Section.

The maximum brightness of comets brighter than 10.0 mag is given with an accuracy of 0.1 mag, that of fainter comets with an accuracy of 0.5 mag. The maximum coma diameter is given with an accuracy of 0.1' for comae less than 1', with an accuracy of 0.5' for comae between 1' and 5' and with an accuracy of 1' for larger comae.

Designation discovered T q [AU] m_max Coma ['] FGK
C/2017 K2 (PANSTARRS) May 21, 2017 Dec 19, 2022 1.80 12.5 1.5 V, C
C/2018 N2 (ASASSN) Jul 07, 2018 Nov 11, 2019 3.12 15.0 0.3 V, C
C/2018 U1 (LEMMON) Oct 27, 2018 Nov 03, 2021 4.99 15.0 0.4 C
C/2019 F1 (ATLAS-Africano) Mar 29, 2019 Jun 22, 2021 3.60 15.0 0.6 C
C/2019 L3 (ATLAS) Jun 10, 2019 Jan 09, 2022 3.55 9.1 4.5 V, C
C/2019 N1 (ATLAS) Jul 05, 2019 Dec 01, 2020 1.71 12.5 1.0 C
C/2019 T4 (ATLAS) Oct 09, 2019 Jun 09, 2022 4.24 13.0 1.0 C
C/2020 F5 (MASTER) Mar 28, 2020 Mar 24, 2021 4.33 14.5 0.6 C
C/2020 J1 (SONEAR) May 01, 2020 Apr 18, 2021 3.36 12.5 2.0 V, C
C/2020 M3 (ATLAS) Jun 27, 2020 Oct 25, 2020 1.27 10.5 5.0 V, C
C/2020 PV6 (PANSTARRS) Jul 21, 2020 Sep 25, 2021 2.30 14.5 0.8 V, C
C/2020 R4 (ATLAS) Sep 12, 2020 Mar 01, 2021 1.03 9.1 8 V, C
C/2020 T2 (Palomar) Oct 07, 2020 Jul 11, 2021 0.99 10.5 4.5 V, C
C/2020 V2 (ZTF) Nov 02, 2020 May 08, 2023 2.23 15.0 1.0 C
C/2021 A1 (Leonard) Jan 03, 2021 Jan 03, 2022 0.62 3.0 16 V, C
C/2021 A2 (NEOWISE) Jan 03, 2021 Jan 22, 2021 1.41 10.5 4.0 V, C
C/2021 A4 (NEOWISE) Jan 03, 2021 Mar 20, 2021 1.15 13.0 1.5 V, C
C/2021 D1 (SWAN) Feb 25, 2021 Feb 27, 2021 0.90 10.5 2.0 V, C
C/2021 E3 (ZTF) Mar 09, 2021 Jun 11, 2022 1.78 15.5 0.5 C
C/2021 O1 (Nishimura) Jul 21, 2021 Aug 13, 2021 0.79 9.0 2.5 C
P/2021 Q5 (ATLAS) Aug 29, 2021 Aug 30, 2021 1.23 13.5 1.5 C
4P/Faye - Sep 08, 2021 1.62 11.0 3.0 V, C
6P/d‘Arrest - Sep 17, 2021 1.35 10.0 4.5 V, C
7P/Pons-Winnecke - May 27, 2021 1.23 11.0 4.0 V, C
8P/Tuttle - Aug 27, 2021 1.03 8.8 3.5 C
10P/Tempel - Mar 24, 2021 1.41 11.0 3.0 C
15P/Finlay - Jul 13, 2021 0.99 11.0 3.0 V, C
17P/Holmes - Feb 19, 2021 2.08 14.0 1.0 C
19P/Borrelly - Feb 01, 2022 1.31 9.4 5.0 V, C
29P/Schwassmann-Wachmann - Mar 07, 2019 5.77 10.5 2.5 V, C
57P/du Toit-Neujmin-Delporte - Oct 17, 2021 1.72 12.0 2.0 V, C
67P/Churyumov-Gerasimenko - Nov 02, 2021 1.21 9.0 6 V, C
88P/Howell - Sep 26, 2020 1.35 11.0 2.5 C
104P/Kowal - Jan 11, 2022 1.07 10.0 6 V, C
108P/Ciffreo - Sep 10, 2021 1.66 14.5 1.0 C
110P/Hartley - Oct 18, 2021 2.46 15.5 0.5 C
132P/Helin-Roman-Alu - Nov 13, 2021 1.69 13.5 0.8 V, C
141P/Machholz - Dec 16, 2020 0.81 10.0 6 V, C
156P/Russell-LINEAR - Nov 17, 2020 1.33 11.0 4.0 V, C
246P/NEAT - Feb 22, 2021 2.86 14.0 0.8 C
277P/LINEAR - Dec 30, 2020 1.90 14.5 0.5 C
284P/McNaught - Sep 12, 2021 2.30 15.0 0.5 C
398P/Boattini - Dec 26, 2020 1.30 12.0 2.0 V, C
409P/LONEOS-Hill - Jan 28, 2021 1.75 15.5 0.4 C
414P/STEREO - Jan 25, 2021 0.53 11.5 1.5 C

Explanation

Andreas Kammerer


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