This table lists the interval when comets are expected to be brighter than 12th magnitude and gives the period of visibility from the UK and elsewhere.
Comet Max From (elsewhere) From (UK) To (UK) To (elsewhere) Notes 2017 K2 (PanSTARRS) 8 2021 November 2024 February Not continuously visible 2019 L3 (ATLAS) 10 2021 July 2022 April 2022 June 2019 T4 (ATLAS) 11 2022 January 2022 April 2022 May 2022 July 2019 U5 (PanSTARRS) 11 2023 January 2023 May 2023 June 2020 K1 (PanSTARRS) 10 2022 December 2023 November 2020 V2 (ZTF) 9 2022 November 2023 September 2023 November Not continuously visible 2021 P4 (ATLAS) 11 Not observable 2021 S3 (PanSTARRS) 7 2023 September 2024 January 2024 August 2021 T4 (Lemmon) 8 2023 May 2023 October 2022 E2 (ATLAS) 13 2024 October 2025 January 2022 E3 (ZTF) 6 2022 October 2023 March 2023 April 2023 A3 (Tsuchinshan-A) 3? 2024 March 2024 December Not continuously visible 2P/Encke 6 2023 August 2023 October 62P/Tuchinshan 8 2023 October 2024 March 103P/Hartley 8 2023 August 2023 December 144P/Kushida 7 2023 September 2024 May 185P/Petriew 11 2023 June 2023 July 226P/Pigott-LINEAR-Kowa 10 2023 August 2023 December 2024 March 237P/LINEAR 10 2023 February 2023 April 2023 September 364P/PanSTARRS 8 2023 February 2023 April 2023 June 12P/Pons-Brooks 4 2023 December 2024 April 2024 August 13P/Olbers 7 2024 February 2024 September 2024 October 33P/Daniel 11 2024 November 2025 January 46P/Wirtanen 11 Not observable 154P/Brewington 11 2024 May 2024 July 2024 August 333P/LINEAR 10 2024 November 2024 December 24P/Schaumasse 8 2025 October 2026 April 21P/Giacobini-Zinner 11 Not observable 289P/Blanpain 11 Not observable 414P/STEREO 11 2025 August 2025 September 88P/Howell 9 2026 February 2026 July 2026 July 1P/Halley 10 2060 October 2061 March 1P/Halley 1 2061 July 2061 August 109P/Swift-Tuttle 1 2126 January 2126 August