This table lists the interval when comets are expected to be brighter than 13 - 14th magnitude and gives the period of visibility from the UK.
Comet Max From (elsewhere) From (UK) To (UK) To (elsewhere) Notes 2006 S3 (LONEOS) 12 2012 May 2012 June 2013 July 185P/Petriew 11 2012 May 2012 July 2012 September 2012 November 2011 F1 (LINEAR) 10 2012 July 2012 September Southern Hemisphere 2013 February 2013 November Southern Hemisphere 2011 L4 (PanSTARRS) 10 2012 August 2012 October Southern Hemisphere -5? 2013 January 2013 March Southern Hemisphere -5? 2013 March 2013 September 262P/McNaught-Russell 11 2012 August 2013 February 2013 March 2010 S1 (LINEAR) 13 2012 September 2014 September 2014 November 2011 R1 (McNaught) 11 2012 September 2013 March 2013 June 2011 UF305 (LINEAR) 12 2012 September 2013 February 2012 A2 (LINEAR) 11 2012 September 2013 December 168P/Hergenrother 11 2012 September 2012 December 260P/McNaught 12 2012 September 2012 December 2012 K5 (LINEAR) 7? 2012 September 2013 February 2013 March 2009 P1 (Garradd) 12 2012 October 2012 December 2012 F6 (Lemmon) 9 2012 December 2013 June 2013 June 29P/Schwassmann-Wachma Vb 2012 December 2013 September 246P/NEAT 11 2013 January 2013 December 26P/Grigg-Skjellerup 14 2013 June 2013 July Southern Hemisphere 102P/Shoemaker 13 2013 June 2013 July 2013 December 154P/Brewington 10 2013 June 2013 August 2014 April 2012 S1 (ISON) -13? 2013 August 2013 September 2014 April 2P/Encke 6 2013 August 2013 November 2014 February Poor elongation post P/2004 CB 11 2014 P/2000 G1 10 2016 45P/Honda-Mrkos-Pjdus 6 2017 41P/Tuttle-Giacobini- 7 2018 46P/Wirtanen 3 2018 August 2019 May P/Pons-Brooks 4 2023 November 2024 April 1P/Halley 10 2060 October 2061 March 1 2061 July 2061 August 109P/Swift-Tuttle 1 2126 January 2126 August