Jan 02 Michal Biesiada reports a Kreutz group comet in real time C3 images Jan 05 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jan 07 Recovery of 2007 B1 (P/Christensen) as 2020 W3 reported Jan 07 Recovery of 2010 B2 (P/WISE) as 2020 Y1 reported Jan 07 Recovery of 2016 J3 (P/STEREO) not formally reported Jan 08 Discovery of 2020 Y2 (ATLAS) reported Jan 10 Discovery of 2021 A1 (Leonard) reported Jan 10 Discovery of 2021 A2 (NEOWISE) reported Jan 10 Discoery of 2020 X4 (Leonard) reported Jan 11 Recovery of 2014 E1 (P/Larson) reported (as 2020 W4) Jan 11 Worachate Boonplod reports a Meyer group comet in real time C2 images Jan 15 Discovery of 2020 W5 (Lemmon) reported Jan 15 Discovery of 2020 Y3 (ATLAS) reported Jan 15 Discovery of 2021 A4 (NEOWISE) reported Jan 15 Discovery of 2021 A5 (P/PanSTARRS) reported Jan 15 Discovery of 2021 A6 (PanSTARSS) reported Jan 15 Discovery of 2021 A7 (NEOWISE) reported Jan 16 Recovery of 2013 EW90 (P/Tenagra) as 2020 Y4 reported Jan 16 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jan 17 Recovery of 2013 A2 (P/Scotti) as 2021 A8 reported Jan 17 Worachate Boonplod reports a non-group comet in real time C3 images Jan 21 Robert Pickard reports a Meyer group comet in delayed C2 images Jan 21 Masanori Uchina reports a Kreutz group comet in real time C3 images Jan 21 Worachate Boonplod reports a non-group comet in real time C2 images Jan 22 Peter Berrett reports a Meyer group comet in archival C2 images Jan 22 Recovery of 2015 J3 (P/NEOWISE) as 2021 B1 reported Jan 23 Discovery of 2021 A9 (PanSTARRS) reported Jan 23 Discovery of 2021 B2 (PanSTARRS) reported Jan 25 Peiyuan Sun reports a Kreutz group comet in real time C3 images Jan 28 Peter Berrett reports a non-group comet in archival C2 images Jan 28 Peter Berrett reports a Meyer group comet in archival C2 images Jan 29 Recovery of 2010 A5 (P/LINEAR) as 2020 Y5 reported Feb 02 Parth Bhagat reports a non-group comet in real time C3 images Feb 04 Discovery of 2021 B3 (NEOWISE) reported Feb 06 Discovery of 2021 A10 (NEOWISE) Feb 08 Worachate Boonplod reports a Marsden group comet in real time C3 images Feb 11 Worachate Boonplod reports three Kreutz group comets in real time C3 images Feb 12 Worachate Boonplod reports a Kreutz group comet in real time C3 images Feb 14 Worachate Boonplod reports a non-group comet in real time C3 images Feb 14 Szymon Liwo reports a Kreutz group comet in real time C3 images Feb 16 Recovery of 2015 F1 (P/PanSTARRS) reported Feb 23 Peter Berrett reports a non-group comet in delayed C2 images Feb 24 Worachate Boonplod reports a Kreutz group comet in real time C3 images Feb 24 Discovery of 2021 C1 (Rankin) reported Feb 24 Discovery of 2021 C2 (P/PanSTARRS) reported Feb 25 2015 F1 recovery designated as 2021 A11 Feb 25 Worachate Boonplod reports two Kreutz group comets in real time C3 images Feb 25 Michael Mattiazzo reports a possible SWAN comet Feb 26 Discovery of 2021 C3 (Catalina) reported Feb 26 Discovery of 2021 C4 (ATLAS) reported Feb 26 Trygve Prestgard reports a Kreutz group comet in archival C3 images Feb 26 Worachate Boonplod reports a Kreutz group comet in real time C3 images Feb 28 Michael Mattiazzo's comet discovered in SWAN images confirmed by Michael Jaeger in ground based images Mar 04 SWAN comet designated 2021 D1 Mar 06 Michal Biesiada reports a Kreutz group comet in real time C3 images Mar 08 Discovery of 2021 C5 (PanSTARRS) reported Mar 08 Worachate Boonplod reports a Kreutz group comet in real time C3 images Mar 11 Sergey Sherpakov reports a Kreutz group comet in real time C3 images Mar 13 Sergey Sherpakov reports a Kreutz group comet in real time C3 images Mar 15 Masanori Uchina reports a Kreutz group comet in delayed C2 images Mar 16 2009 Q1 (P/Hill) recovered as 2021 E1 Mar 20 Worachate Boonplod reports a Kreutz group comet in real time C3 images Mar 21 Discovery of 2021 C6 (Lemmon) reported Mar 21 Worachate Boonplod reports a Meyer group comet in real time C2 images Mar 22 Discovery of 2021 D2 (ZTF) reported Mar 23 Worachate Boonplod reports a Kreutz group comet in real time C3 images Mar 24 Peiyuan Sun and Michal Biesiada report a Kreutz group comet in real time C3 images Mar 25 Cometary activity confirmed in 2020 F7 Mar 26 Worachate Boonplod reports a Kreutz group comet in real time C2 images Mar 27 Trygve Prestgard reports a Kreutz group comet in archival C3 images Mar 28 Szymon Liwo reports a Kreutz group comet in real time C2 images Mar 29 Peiyuan Sun reports a Kreutz group comet in real time C3 images Mar 30 Worachate Boonplod reports two Kreutz group comets in real time C3 images Apr 01 Rafal Biros reports a Kreutz group comet in real time C2 images Apr 02 Worachate Boonplod reports a Kreutz group comet in real time C3 images Apr 02 Masanori Uchina reports two Kreutz group comets in delayed C2 images Apr 07 Cometary activity confirmed in 2019 U5 Apr 07 Peiyuan Sun reports a Kreutz group comet in real time C3 images Apr 07 Szymon Liwo reports a Kreutz group comet in real time C2 images Apr 08 Szymon Liwo reports a Kreutz group comet in real time C2 images Apr 10 Worachate Boonplod reports a Kreutz group comet in real time C3 images Apr 11 Worachate Boonplod reports a Kreutz group comet in real time C3 images Apr 13 Worachate Boonplod reports a Kreutz group comet in real time C2 images Apr 13 Szymon Liwo reports a Kreutz group comet in real time C3 images Apr 14 Peiyuan Sun reports a Kreutz group comet in real time C3 images Apr 14 Masanori Uchina reports a Kreutz group comet in real time C2 images Apr 15 Masanori Uchina reports a Kreutz group comet in real time C2 images Apr 16 Masanori Uchina reports a Kreutz group comet in real time C2 images Apr 17 Worachate Boonplod reports a Kreutz group comet in real time C2 images Apr 18 Szymon Liwo reports a Kreutz group comet in real time C2 images Apr 20 Worachate Boonplod reports a Kreutz group comet in real time C2 images Apr 20 Szymon Liwo reports a Kreutz group comet in real time C2 images Apr 21 Worachate Boonplod reports a Kreutz group comet in real time C3 images Apr 21 Szymon Liwo reports a Kreutz group comet in real time C2 images Apr 24 Worachate Boonplod reports two Kreutz group comets in real time C2 images Apr 27 Peter Berrett reports a non-group comet in archival C2 images Apr 27 Discovery of A/2021 F1 reported Apr 28 Discovery of A/2021 E2 reported Apr 29 Worachate Boonplod reports a Kreutz group comet in real time C3 images May 05 Worachate Boonplod reports a Kreutz group comet in real time C2 images May 06 Discovery of 2021 E3 (ZTF) reported May 06 Discovery of 2021 G1 (Leonard) reported May 07 Szymon Liwo reports a Kreutz group comet in real time C3 images May 08 Trygve Prestgard reports a Kreutz group comet in delayed C2 images May 10 Worachate Boonplod reports a Kreutz group comet in real time C2 images May 11 Worachate Boonplod reports a Kreutz group comet in real time C2 images May 11 Worachate Boonplod reports a Meyer group comet in real time C2 images May 12 Masanori Uchina reports a Kreutz group comet in real time C2 images May 13 Worachate Boonplod reports a Kreutz group comet in real time C2 images May 14 Michal Biesiada reports a comet in real time C2 images May 15 Worachate Boonplod reports a Kreutz group comet in real time C2 images May 15 Robert Pickard reports a Kreutz group comet in real time C2 images May 16 Robert Pickard reports a Meyer group comet in real time C2 images May 16 Peter Berrett reports a non-group comet in archival C2 images May 22 Worachate Boonplod reports a Kreutz group comet in real time C3 images May 22 Trygve Prestgard reports a non-group comet in real time C2 images May 27 Discovery of 2021 K1 (ATLAS) reported May 29 Cometary activity reported in 2020 PV6 (PanSTARRS) May 29 Robert Pickard reports a Kreutz group comet in real time C2 images May 31 Recovery of 2009 U4 (P/McNaught) as 2020 H10 reported May 31 Worachate Boonplod reports a Kreutz group comet in real time C2 images Jun 02 Discovery of 2021 J1 (Maury-Attard) reported Jun 02 Discovery of 2021 J2 (PanSTARRS) reported Jun 03 Discovery of 2021 J3 (P/ATLAS) reported Jun 03 Rafal Biros reports a Kreutz group comet in real time C2 images Jun 03 Worachate Boonplod reports a Kreutz group comet in delayed C2 images Jun 03 Trygve Prestgard reports a Kreutz group comet in archival C2 images Jun 04 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 04 Masanori Uchina reports two Kreutz group comets in delayed C2 images Jun 09 Discovery of 2021 K2 (MASTER) reported Jun 09 Worachate Boonplod reports a Kreutz group comet in real time C2 images Jun 09 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 10 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 10 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jun 14 Michal Biesiada reports two Kreutz group comets in delayed C2 images Jun 14 Masanori Uchina reports a Kreutz group comet in delayed C2 images Jun 14 Worachate Boonplod reports a Kreutz group comet in real time C2 images Jun 17 Recovery of 2006 S4 (P/Christensen) as 2021 L1 formally reported Jun 19 Discovery of 2014 UN271 reported Jun 20 Masanori Uchina reports a Kreutz group comet in delayed C2 images Jun 21 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jun 21 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 22 Discovery of 2021 L2 (P/Leonard) reported Jun 22 Discovery of 2021 L3 (Borisov) reported Jun 23 Discovery of 2021 L4 (P/PanSTARRS) reported Jun 23 Discovery of A/2021 E4 reported Jun 23 Discovery of A/2021 G2 reported Jun 23 Masanori Uchina reports a Kreutz group comet in real time C2 images Jun 25 Discovery of 2021 G3 (PanSTARRS) reported Jun 25 Discovery of 2021 K3 (Catalina) reported Jun 25 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 25 Masanori Uchina reports a Kreutz group comet in real time C2 images Jun 26 Recovery of 2008 CL94 (P/Lemmon) as 2021 A12 reported Jun 26 Rafal Biros reports a Kreutz group comet in real time C2 images Jun 26 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jun 26 Masanori Uchina reports a Kreutz group comet in delayed C2 images Jun 27 Michal Biesiada reports a Kreutz group comet in real time C2 images Jun 27 Michal Biesiada reports a Kreutz group comet in real time C3 images Jun 27 Peter Berrett reports a Kreutz group comet in real time C2 images Jun 28 Rafal Biros reports a Kreutz group comet in real time C2 images Jun 29 Robert Pickard reports a Kreutz group comet in real time C2 images Jun 29 Robert Pickard reports a Kreutz group comet in delayed C2 images Jun 29 Rafal Biros reports two Kreutz group comets in real time C2 images Jun 30 Michal Biesiada reports a Kreutz group comet in real time C2 images Jul 03 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jul 03 Trygve Prestgard reports a Kreutz group comet in archival C2 images Jul 03 Worachate Boonplod reports a non-group comet in real time C2 images Jul 04 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jul 04 Robert Pickard reports a Kreutz group comet in archival C2 images Jul 08 Recovery of 2012 S2 (P/La Sagra) as 2021 L5 reported Jul 09 Cometary activity (tail) reported in (248370) 2005 QN173 Jul 13 Discovery of 2021 N1 (P/ZTF) reported Jul 13 Rafal Biros reports a Kreutz group comet in archival C2 images Jul 13 Salil Mulye reports a Kreutz group comet in real time C3 images Jul 13 Worachate Boonplod reports a non-group comet in real time C3 images Jul 13 Worachate Boonplod reports a Meyer group comet in real time C2 images Jul 14 Sergey Shurpakov reports a Kreutz group comet in real time C3 images Jul 15 Discovery of 2021 N2 (P/Fuls) reported Jul 16 Masanori Uchina reports a Kreutz group comet in real time C3 images Jul 19 Robert Pickard reports a Kreutz group comet in archival C2 images Jul 19 Rafal Biros reports a Kreutz group comet in archival C2 images Jul 19 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jul 20 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jul 22 Discovery of 2021 N3 (PanSTARRS) reported Jul 23 Robert Pickard reports a Kreutz group comet in archival C2 images Jul 25 Discovery of 2021 O1 (Nishimura) reported Jul 25 Peter Berrett reports a non-group comet in archival C2 images Jul 25 Rafal Biros reports a Kreutz group comet in archival C2 images Jul 27 Worachate Boonplod reports a Kreutz group comet in real time C3 images Jul 28 Robert Pickard reports a Kreutz group comet in archival C2 images Jul 28 Peter Berrett reports a non-group comet in delayed C2 images Jul 30 Recovery of 2005 W3 (P/Kowalski) as 2021 O2 reported Aug 01 Discovery of 2021 O3 (PanSTARRS) reported Aug 05 Peter Berrett reports a non-group comet in archival C2 images Aug 08 Recovery of 2019 A7 (P/PanSTARRS) as 2021 K4 reported Aug 08 Recovery of 2017 S5 (P/ATLAS) as 2021 L6 reported Aug 08 Worachate Boonplod reports a Kreutz group comet in real time C3 images Aug 09 Worachate Boonplod reports a Kreutz group comet in real time C3 images Aug 11 Trygve Prestgard reports a Meyer group comet in real time C2 images Aug 14 Worachate Boonplod reports a Kreutz group comet in real time C3 images Aug 14 Peter Berrett reports a non-group comet in recent C2 images Aug 15 Death of Carolyn Shoemaker reported Aug 16 Discovery of P/2021 N4 reported Aug 16 Discovery of 2021 P1 (PanSTARRS) reported Aug 18 Discovery of 2021 P2 (PanSTARRS) reported Aug 19 Discovery of 2021 P3 (P/PanSTARRS) reported Aug 20 Peter Berrett reports a Meyer group comet in archival C2 images Aug 21 Discovery of 2021 P4 (ATLAS) reported Aug 22 Recovery of 2014 W12 (P/Gibbs) as 2021 Q1 reported Aug 22 Peiyuan Sun reports a Kreutz group comet in real time C3 images Aug 24 Anon reports a Kreutz group comet in real time C3 images Aug 25 Peter Berrett reports a non-group comet in archival C2 images Aug 26 Masanori Uchina reports a Kreutz group comet in real time C3 images Aug 27 Worachate Boonplod reports a Kreutz group comet in real time C3 images Aug 27 Robert Pickard reports a Kreutz group comet in archival C2 images Aug 28 Recovery of 2008 QP20 (P?LINEAR-Hill) as 2021 M1 reported Aug 28 Recovery of 2011 A2 (P/Scotti) as 2021 Q2 reported Aug 28 Recovery of 2015 Q1 (P/Scotti) as 2021 P5 reported Aug 29 Peter Berrett reports two non-group comets in archival C2 images Aug 31 Precovery of 2021 N4 as 2016 U2 reported Aug 31 Discovery of 2021 Q3 (ATLAS) reported Aug 31 Worachate Boonplod reports a Meyer group comet in real time C2 images Aug 31 Discovery of 2021 Q4 (Fuls) reported Sep 01 Death of Kazua Kinoshita in July reported Sep 02 Worachate Boonplod reports a non-group comet in real time C2 images Sep 05 Peter Berrett reports a non-group comet in archival C2 images Sep 05 Peter Berrett reports a Meyer group comet in archival C2 images Sep 06 Discovery of 2021 Q5 (ATLAS) reported Sep 06 Peter Berrett reports a Meyer group comet in archival C2 images Sep 08 Discovery of 2021 R1 (P/PanSTARRS) reported Sep 08 Discovery of 2021 R2 (PanSTARRS) reported Sep 09 Discovery of 2021 Q6 (PanSTARRS) reported Sep 11 Discovery of 2021 R3 (P/PanSTARRS)reported Sep 11 Discovery of 2021 R4 (P/Wierzchos) reported Sep 11 Discovery of 2021 R5 (P/Rankin) reported Sep 11 Robert Pickard reports a Kreutz group comet in archival C2 images Sep 11 Worachate Boonplod reports a Kreutz group comet in real time C3 images Sep 11 Worachate Boonplod reports a non-group comet in real time C2 images Sep 11 Masanori Uchina reports a Kreutz group comet in real time C3 images Sep 12 Worachate Boonplod reports a Kreutz group comet in real time C3 images Sep 15 Worachate Boonplod reports a Kreutz group comet in real time C3 images Sep 17 Robert Pickard reports a Kreutz group comet in archival C2 images Sep 17 Peter Berrett reports a Kreutz group comet in archival C2 images Sep 18 Robert Pickard reports two Kreutz group comets in archival C2 images Sep 18 Worachate Boonplod reports a Kreutz group comet in real time C3 images Sep 18 Peter Berrett reports a Kreutz group comet in archival C2 images Sep 19 Cometary activity in 2021 HS (P/PanSTARRS) reported Sep 19 Peter Berrett reports a Kreutz group comet in archival C2 images Sep 26 Robert Pickard reports a Kreutz group comet in archival C2 images Sep 26 Peter Berrett reports a non-group comet in archival C2 images Sep 28 Discovery of 2021 R6 (P/Groeller) reported Sep 29 Peter Berrett reports a Meyer group comet in archival C2 images Sep 30 Worachate Boonplod reports a Kreutz group comet in real time C3 images Oct 02 Peiyuan Sun reports a Kreutz group comet in real time C3 images Oct 03 Discovery of 2021 S1 (ATLAS) reported Oct 04 Recovery of 2012 TK8 (P/Tenagra) as 2021 S2 reported Oct 07 Worachate Boonplod reports a Kreutz group comet in real time C3 images Oct 07 Worachate Boonplod reports a Kreutz group comet in real time C2 images Oct 08 Discovery of 2021 R7 (PanSTARRS) reported Oct 08 Discovery of 2021 S3 (PanSTARRS) reported Oct 08 Discovery of 2021 S4 (Tsuchinshan) reported Oct 08 Discovery of 2021 T1 (Lemmon) reported Oct 08 Discovery of 2021 T2 (Fuls) reported Oct 09 Discovery of 2021 T3 (P/PanSTARRS) reported Oct 11 Cometary activity reported in 2021 G2 Oct 11 Zesheng Yang reports a Kreutz group comet in real time C2 images Oct 13 Worachate Boonplod reports a Kreutz group comet in real time C2 images Oct 15 Worachate Boonplod reports a Kreutz group comet in real time C3 images Oct 15 Masanori Uchina reports a Kreutz group comet in real time C3 images Oct 16 Michal Biesiada reports a Kreutz group comet in real time C2 images Oct 17 342P/SOHO recovered by Worachate Boonplod in real time C3 images Oct 18 57P/ reported in outburst Oct 18 Michal Biesiada and Zesheng Yang report a Kreutz group comet in real time C2 images Oct 19 Discovery of 2021 U1 (P/Wierzchos) reported Oct 19 Worachate Boonplod reports a Kreutz group comet in real time C3 images Oct 19 Worachate Boonplod reports a Kreutz group comet in real time C2 images Oct 21 Robert Pickard reports a Kreutz group comet in real time C2 images Oct 22 Robert Pickard reports a Kreutz group comet in real time C2 images Oct 27 Recovery of 2007 R4 (P/Garradd) as 2021 U2 reported Oct 27 Robert Pickard reports a Kreutz group comet in real time C3 images Oct 27 Zesheng Yang reports a Kreutz group comet in real time C3 images Oct 27 Szymon Liwo and Jiangao Ruan report a Kreutz group comet in real time C2 images Oct 27 Robert Pickard reports a Kreutz group comet in real time C2 images Oct 29 Discovery of 2021 T4 (Lemmon) reported Oct 30 Rafal Biros reports a Kreutz group comet in real time C2 images Nov 02 Discovery of 2021 U3 (P/Attard-Maury) reported Nov 02 Discovery of 2021 U4 (Leonard) reported Nov 02 Robert Pickard reports a Kreutz group comet in real time C2 images Nov 03 Szymon Liwo reports a Kreutz group comet in real time C2 images Nov 03 Robert Pickard reports a Kreutz group comet in real time C3 images Nov 04 Zesheng Yang and Robert Pickard report a Kreutz group comet in real time C2 images Nov 05 Zesheng Yang reports a Kreutz group comet in real time C2 images Nov 06 Worachate Boonplod reports a Meyer group comet in real time C2 images Nov 08 Discovery of 2021 V1 (Rankin)reported Nov 08 Discovery of 2021 V2 (P/Fuls) reported Nov 09 Worachate Boonplod reports two Kreutz group comets in real time C3 images Nov 09 Discovery of 2021 V3 (P/PanSTARRS) reported Nov 09 Zesheng Yang and Robert Pickard report a Kreutz group comet in real time C2 images Nov 10 Discovery of 2021 U5 (Catalina) reported Nov 12 Zesheng Yang reports a Kreutz group comet in delayed C2 images Nov 16 Worachate Boonplod reports two Kreutz group comets in real time C2 images Nov 17 Zesheng Yang reports a Kreutz group comet in real time C2 images Nov 17 Worachate Boonplod reports a Kreutz group comet in real time C2 images Nov 18 Zesheng Yang reports a Kreutz group comet in real time C2 images Nov 19 Zesheng Yang reports a Meyer group comet in real time C2 images Nov 20 Worachate Boonplod reports a Kreutz group comet in real time C3 images Nov 20 Worachate Boonplod reports a Kreutz group comet in real time C2 images Nov 20 Worachate Boonplod reports a Kreutz group comet in real time C3 images Nov 21 Peter Berrett reports a Meyer group comet in archival C2 images Nov 24 Zesheng Yang reports a Kreutz group comet in real time C2 images Nov 24 Recovery of 2005 T2 (P/Christensen)as 2020 OV62 reported Nov 26 Worachate Boonplod reports a Kreutz group comet in real time C2 images Nov 30 Robert Pickard reports a Kreutz group comet in real time C2 images Nov 30 Zesheng Yang reports a Kreutz group comet in real time C2 images Nov 30 Robert Pickard reports a Kreutz group comet in real time C2 images Dec 01 Worachate Boonplod and Zesheng Yang report a Kreutz group comet in real time C3 images Dec 01 Zesheng Yang reports two Kreutz group comets in real time C2 images Dec 03 Worachate Boonplod reports a Kreutz group comet in real time C3 images Dec 03 Recovery of 2008 WZ96 (P/LINEAR) as 2021 W1 reported Dec 04 Zesheng Yang reports a Kreutz group comet in real time C2 images Dec 04 Zesheng Yang reports a Kreutz group comet in real time C3 images Dec 05 Szymon Liwo reports a Kreutz group comet in real time C3 images Dec 05 Zesheng Yang reports a Kreutz group comet in real time C3 images Dec 07 Discovery of 2021 R8 (P/Sheppard) reported Dec 07 Robert Pickard reports a Kreutz group comet in delayed C2 images Dec 08 Discovery of 2021 X1 (A/MAP) reported Dec 09 Worachate Boonplod reports a Kreutz group comet in real time C3 images Dec 09 Robert Pickard reports a Kreutz group comet in real time C2 images Dec 10 Robert Pickard reports a Kreutz group comet in real time C2 images Dec 12 Robert Pickard reports a Kreutz group comet in real time C3 images Dec 13 Robert Pickard reports a Kreutz group comet in real time C2 images Dec 15 Discovery of 2021 X2 (A/Kitt Peak) reported Dec 16 Worachate Boonplod reports a Kreutz group comet in real time C3 images Dec 17 Szymon Liwo reports a Kreutz group comet in real time C3 images Dec 18 Worachate Boonplod reports two Kreutz group comets in real time C3 images Dec 22 Robert Pickard reports two Kreutz group comets in archival C2 images Dec 23 Worachate Boonplod reports two Kreutz group comets in real time C3 images Dec 24 Zesheng Yang reports a Kreutz group comet in real time C2 images Dec 27 Robert Pickard reports a Kreutz group comet in archival C2 images Dec 27 Trygve Prestgard reports a Kreutz group comet in real time C2 images