Comets visible from the UK

This table lists the interval when comets are expected to be brighter than 12th magnitude and gives the period of visibility from the UK.

Comet			Max	From (elsewhere)	From (UK)	To (UK)		To (elsewhere)	Notes
2015 V1 (Johnson)	 6				2016 December	2017 July	2017 November
2016 M1 (PanSTARRS)	 9				2017 October	2017 November	2018 September
2016 R2 (PanSTARRS)	 9 ?	2017 April		2017 August	2019 June
2017 K2 (PanSTARRS)	 6				2021 November	2024 February			Not continuously visible
2017 O1 (ASASSN1)	 8				2017 August	2018 February
2017 S3 (PanSTARRS)	 4				2018 July	2018 August			Not visible when brightest
2017 T1 (Heinze)	10				2017 December	2018 February	
2017 T2 (PanSTARRS)	 8				2019 October	2020 August	2020 October
2017 T3 (ATLAS)		10	2018 July						2018 August	Poorly placed
24P/Schaumasse		10				2017 September	2018 January
71P/Clark		10	2017 March						2017 September
62P/Tsuchinshan		11				2017 October	2018 February
2013 CU129 (PanSTARRS)	11	2018 June						2018 July
21P/Giacobini-Zinner	 4				2018 June	2018 October	2018 December
38P/Stephan-Oterma	 9				2018 September	2019 January
46P/Wirtanen		 3				2018 August	2019 May
48P/Johnson		10	2018 May		2018 July	2018 August	2018 November
185P/Petriew		11				2018 January	2018 February
289P/Blanpain		 5?	2019 September		2019 October	2020 March
88P/Howell		 9				2020 March	2020 June	2021 January
141P/Machholz		11	2020 November						2021 January
7P/Pons-Winnecke	 9				2021 March	2021 May	2021 August
15P/Finlay		 9	2021 May		2021 July	2021 September
67P/Churyumov-Geras	 7	2021 June		2021 July	2022 April
19P/Borrelly		 9	2021 September		2021 December	2022 May
81P/Wild		10				2022 October	2023 March	2023 May
104P/Kowal		 9				2021 November	2022 March
P/Pons-Brooks		 4				2023 November	2024 April
1P/Halley		10				2060 October	2061 March
1P/Halley		 1				2061 July	2061 August
109P/Swift-Tuttle	 1				2126 January	2126 August