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)

---------------------------------------------------------------------

Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.