Comets Waiting for First Observation

Japanese version Home page

Updated on October 5, 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)