Comets Waiting for First Observation

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Updated on October 17, 2025

Please see also the Weekly Information about Bright Comets and Comet Catalog.

Bright periodic comets not yet observed in this return. 489P/Denning was observed on 2025 Aug. 2 at 20.7 mag by John Maikner, but not officially confirmed yet. P/2010 H2 ( Vales ) was fainter than 22 mag on 2025 Jan. 27 (Erwin Schwab). P/2010 T2 ( PanSTARRS ) was fainter than 21.5 mag on 2023 Oct. 17 (Erwin Schwab). 2025 October 21 at lat. 35 deg in the Northern/Sothern Hemisphere: Lat. 35 N deg Lat. 35 S deg Comet R.A. Decl. m1 Best Time(A, h) Best Time(A, h) P/2015 TO19 (Lemmon-PanSTARRS) 03 04 +27.2 19.1 1:07 ( 0, 82) 1:07 (180, 28) P/2004 V5 (LINEAR-Hill) 04 32 +28.3 19.2 2:35 ( 0, 83) 2:35 (180, 27) 340P/Boattini 21 33 -12.6 19.3 19:33 ( 0, 43) 19:49 (170, 67) P/1999 RO28 (LONEOS) 20 05 -31.0 19.7 18:42 ( 8, 24) 19:49 ( 94, 68) 317P/WISE 14 54 -20.7 19.7 18:42 ( 71, -9) 19:49 ( 66, 2) 233P/La Sagra 06 14 +20.3 19.8 4:17 ( 0, 75) 3:40 (190, 34) P/2012 O1 (McNaught) 18 48 -29.0 19.8 18:42 ( 26, 21) 19:49 ( 86, 52) (248590) 2006 CS 04 19 -47.3 19.8 2:21 ( 0, 8) 2:21 ( 0, 78) 407P/PanSTARRS-Fuls 07 34 +22.7 19.9 4:46 (314, 73) 3:40 (210, 26) P/2009 B1 (Boattini) 22 18 +16.7 20.1 20:18 ( 0, 72) 20:18 (180, 38) P/2005 S2 (Skiff) 20 52 -16.3 20.3 18:52 ( 0, 39) 19:49 (143, 67) 139P/Vaisala-Oterma 20 09 -17.8 20.4 18:42 ( 10, 37) 19:49 (122, 62) 82P/Gehrels 3 03 33 +19.4 20.5 1:37 ( 0, 75) 1:37 (180, 35) 186P/Garradd 07 47 +44.3 20.7 4:46 (228, 75) 3:40 (203, 5) 469P/PanSTARRS 14 02 -03.7 20.7 18:42 ( 92,-10) 19:49 ( 71,-19) P/2021 A5 (PanSTARRS) 22 17 +00.8 20.7 20:17 ( 0, 56) 20:17 (180, 54) 218P/LINEAR 10 58 +05.4 20.8 4:46 (281, 25) 3:40 (260, 5) 379P/Spacewatch 12 14 -03.0 20.9 4:46 (277, 4) 3:40 (278, -6) P/2022 BV9 (Lemmon) 12 21 -07.4 21.0 4:46 (279, 0) 3:40 (282, -5) 228P/LINEAR 00 20 -01.9 21.0 22:20 ( 0, 53) 22:20 (180, 57) P/2016 G1 (PanSTARRS) 23 46 +03.2 21.0 21:46 ( 0, 58) 21:46 (180, 52) P/2019 S3 (PanSTARRS) 20 22 -20.4 21.1 18:42 ( 5, 35) 19:49 (123, 66) (944) Hidalgo 15 41 -52.9 21.1 18:42 ( 38,-19) 19:49 ( 42, 26) P/2005 T3 (Read) 00 46 +03.1 21.1 22:46 ( 0, 58) 22:46 (180, 52) P/2017 FL36 (PanSTARRS) 04 44 +43.0 21.2 2:48 (180, 82) 2:48 (180, 12) P/2010 D2 (WISE) 21 23 +20.9 21.3 19:23 ( 0, 76) 19:49 (173, 34) P/2017 U3 (PanSTARRS) 20 03 -11.0 21.4 18:42 ( 13, 43) 19:49 (129, 56) 246P/NEAT 06 50 +28.7 21.4 4:46 (347, 84) 3:40 (197, 24) P/2010 C1 (Scotti) 04 23 +11.1 21.4 2:26 ( 0, 66) 2:26 (180, 44) P/2011 N1 (ASH) 18 36 -41.9 21.4 18:42 ( 23, 8) 19:49 ( 65, 52) 245P/WISE 13 52 -27.8 21.4 18:42 ( 72,-25) 19:49 ( 51, -5) P/2012 K3 (Gibbs) 14 17 -03.3 21.4 18:42 ( 91, -7) 19:49 ( 74,-16) P/2017 B4 (PanSTARRS) 09 29 +15.3 21.4 4:46 (288, 48) 3:40 (238, 16) P/2011 P1 (McNaught) 14 46 -19.7 21.5 18:42 ( 73,-10) 19:49 ( 65, -1) 373P/Rinner 23 38 +12.4 21.5 21:38 ( 0, 67) 21:38 (180, 43) P/2023 B3 (PanSTARRS) 14 38 -07.9 21.5 18:42 ( 84, -5) 19:49 ( 73, -9) 76P/West-Kohoutek-Ikemura 00 33 -47.1 21.5 22:32 ( 0, 8) 22:32 ( 0, 78) P/2019 A4 (PanSTARRS) 20 08 -25.4 21.5 18:42 ( 8, 29) 19:49 (108, 66) 2010 RH69 11 14 -00.6 21.6 4:46 (284, 18) 3:40 (267, 5) P/2010 H4 (Scotti) 11 40 +04.0 21.7 4:46 (276, 15) 3:40 (267, -3) P/2010 T2 (PanSTARRS) 09 36 +21.7 21.7 4:46 (278, 50) 3:40 (235, 10) 187P/LINEAR 10 13 +17.5 21.8 4:46 (277, 40) 3:40 (244, 6) 198P/ODAS 06 53 +24.6 21.9 4:46 (348, 79) 3:40 (199, 28) 7P/Pons-Winnecke 08 09 +26.1 21.9 4:46 (290, 70) 3:40 (216, 19) 2018 BJ11 06 37 +27.0 21.9 4:40 ( 0, 82) 3:40 (195, 26) P/2011 V1 (Boattini) 15 07 -18.7 21.9 18:42 ( 71, -6) 19:49 ( 69, 3) P/2015 R2 (PanSTARRS) 02 46 -01.0 21.9 0:50 ( 0, 54) 0:50 (180, 56) P/2015 X6 (PanSTARRS) 09 58 +13.8 22.0 4:46 (284, 42) 3:40 (244, 12) 2019 OE31 12 44 -01.8 22.0 4:46 (271, -1) 3:40 (281,-12) 231P/LINEAR-NEAT 05 30 +10.3 22.0 3:33 ( 0, 65) 3:33 (180, 45) P/2000 R2 (LINEAR) 18 37 -17.9 22.0 18:42 ( 34, 30) 19:49 ( 99, 45) 175P/Hergenrother 08 02 +19.6 22.1 4:46 (307, 67) 3:40 (218, 26) P/2005 E1 (Tubbiolo) 15 58 -24.3 22.1 18:42 ( 59, 1) 19:49 ( 71, 16) 366P/Spacewatch 18 40 -29.4 22.1 18:42 ( 28, 20) 19:49 ( 85, 50) 63P/Wild 1 06 56 +45.7 22.1 4:46 (192, 79) 3:40 (194, 7) 324P/La Sagra 15 35 -26.3 22.1 18:42 ( 61, -5) 19:49 ( 66, 12) P/2010 H2 (Vales) 15 10 -16.1 22.1 18:42 ( 73, -3) 19:49 ( 71, 2) 412P/WISE 05 23 +34.3 22.2 3:26 ( 0, 89) 3:26 (180, 21) 249P/LINEAR 07 39 +16.0 22.4 4:46 (323, 67) 3:40 (215, 31) 147P/Kushida-Muramatsu 12 47 -03.0 22.4 4:46 (272, -3) 3:40 (283,-12) 316P/LONEOS-Christensen 09 21 +07.0 22.6 4:46 (298, 44) 3:40 (243, 23) 489P/Denning 09 24 +19.3 22.6 4:46 (283, 51) 3:40 (234, 14) 311P/PanSTARRS 16 12 -22.4 22.7 18:42 ( 59, 4) 19:49 ( 74, 18) 304P/Ory 18 27 -25.5 22.8 18:42 ( 32, 22) 19:49 ( 88, 46) 367P/Catalina 18 56 -30.1 23.2 18:42 ( 24, 20) 19:49 ( 85, 54) 2008 BJ22 16 25 -12.5 23.9 18:42 ( 64, 13) 19:49 ( 85, 15) P/2008 Y12 = P/2014 K3 (SOHO) 16 41 -36.7 28.5 18:42 ( 44, -1) 19:49 ( 64, 30)