Comets Waiting for First Observation

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Updated on October 3, 2025

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

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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 September 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)
340P/Boattini                       21 32 -12.7  18.9  21:30 (  0, 42)  21:30 (180, 68)
P/2015 TO19 (Lemmon-PanSTARRS)      03 11 +26.4  19.4   3:13 (  0, 81)   3:13 (180, 29)
P/2004 V5 (LINEAR-Hill)             04 35 +27.1  19.5   4:22 (338, 82)   4:27 (182, 28)
P/2012 O1 (McNaught)                17 15 -27.4  19.8  19:23 ( 30, 21)  19:19 ( 97, 63)
317P/WISE                           13 07 -13.8  20.0  19:23 ( 81,-11)  19:19 ( 77,  6)
P/2005 S2 (Skiff)                   20 53 -16.0  20.2  20:52 (  0, 39)  20:52 (180, 71)
P/2009 B1 (Boattini)                22 33 +18.3  20.3  22:30 (  0, 73)  22:30 (180, 37)
P/1999 RO28 (LONEOS)                18 27 -26.6  20.3  19:23 ( 14, 27)  19:19 (123, 76)
139P/Vaisala-Oterma                 20 04 -17.8  20.3  20:03 (  0, 37)  20:03 (180, 73)
(248590) 2006 CS                    04 09 -30.9  20.4   4:09 (  0, 24)   4:09 (180, 86)
P/2016 G1 (PanSTARRS)               00 03 +09.0  20.4   0:05 (  0, 64)   0:05 (180, 46)
407P/PanSTARRS-Fuls                 07 02 +23.1  20.5   4:22 (278, 53)   4:27 (219, 21)
233P/La Sagra                       05 29 +17.9  20.5   4:22 (314, 67)   4:27 (199, 35)
P/2021 A5 (PanSTARRS)               22 32 +00.4  20.5  22:30 (  0, 56)  22:30 (180, 54)
82P/Gehrels 3                       03 41 +19.9  20.7   3:42 (  0, 75)   3:42 (180, 35)
P/2022 BV9 (Lemmon)                 11 59 -04.5  20.8  19:23 ( 99,-20)  19:19 ( 74,-14)
469P/PanSTARRS                      13 16 -00.6  20.9  19:23 ( 90, -2)  19:19 ( 89,  0)
186P/Garradd                        07 31 +43.6  20.9   4:22 (242, 53)   4:27 (212,  1)
P/2019 S3 (PanSTARRS)               19 46 -19.3  21.0  19:45 (  0, 36)  19:45 (180, 74)
228P/LINEAR                         00 37 -00.6  21.0   0:39 (  0, 55)   0:39 (180, 55)
(944) Hidalgo                       15 24 -53.2  21.1  19:23 ( 32,-12)  19:19 ( 47, 45)
P/2005 T3 (Read)                    00 58 +04.1  21.2   1:00 (  0, 59)   1:00 (180, 51)
379P/Spacewatch                     11 19 +01.6  21.2   4:22 (260,-11)   4:27 (276,-12)
P/2017 U3 (PanSTARRS)               19 59 -09.7  21.2  19:58 (  0, 45)  19:58 (180, 65)
P/2019 A4 (PanSTARRS)               19 52 -25.3  21.2  19:51 (  0, 30)  19:51 (180, 80)
P/2010 D2 (WISE)                    21 37 +22.1  21.3  21:35 (  0, 77)  21:35 (180, 33)
P/2011 N1 (ASH)                     18 25 -42.6  21.4  19:23 ( 11, 11)  19:19 ( 51, 77)
P/2023 B3 (PanSTARRS)               14 13 -05.7  21.4  19:23 ( 78,  7)  19:19 ( 93, 14)
266P/Christensen                    23 50 -01.7  21.4  23:48 (  0, 53)  23:48 (180, 57)
P/2011 P1 (McNaught)                14 31 -18.5  21.5  19:23 ( 65,  2)  19:19 ( 84, 25)
2010 RH69                           10 49 +01.9  21.5   4:22 (265, -5)   4:27 (272, -6)
366P/Spacewatch                     17 60 -29.8  21.5  19:23 ( 19, 22)  19:19 (102, 72)
246P/NEAT                           06 41 +27.8  21.6   4:22 (274, 59)   4:27 (212, 20)
P/2010 C1 (Scotti)                  04 26 +11.9  21.6   4:22 (357, 67)   4:27 (180, 43)
245P/WISE                           12 55 -22.6  21.6  19:23 ( 74,-18)  19:19 ( 68,  8)
P/2012 K3 (Gibbs)                   13 32 +01.2  21.6  19:23 ( 89,  2)  19:19 ( 93,  2)
P/2017 FL36 (PanSTARRS)             04 40 +40.5  21.7   4:22 (213, 83)   4:27 (183, 14)
P/2017 B4 (PanSTARRS)               08 45 +16.2  21.7   4:22 (270, 29)   4:27 (242, 10)
P/2010 T2 (PanSTARRS)               09 12 +22.8  21.8   4:22 (260, 26)   4:27 (241,  1)
P/2015 R2 (PanSTARRS)               02 59 +02.6  21.8   3:01 (  0, 58)   3:01 (180, 52)
P/2010 H4 (Scotti)                  11 16 +06.5  21.8   4:22 (257, -7)   4:27 (272,-14)
218P/LINEAR                         09 54 +11.4  21.8   4:22 (265, 12)   4:27 (256,  0)
2019 OE31                           12 17 +01.3  21.9  19:23 (101,-13)  19:19 ( 82,-14)
P/2005 E1 (Tubbiolo)                15 35 -23.3  21.9  19:23 ( 52, 10)  19:19 ( 87, 40)
187P/LINEAR                         09 46 +18.8  22.0   4:22 (259, 18)   4:27 (249, -3)
373P/Rinner                         23 57 +16.1  22.0  23:54 (  0, 71)  23:54 (180, 39)
324P/La Sagra                       14 48 -25.5  22.0  19:23 ( 57,  1)  19:19 ( 79, 32)
76P/West-Kohoutek-Ikemura           01 08 -46.5  22.1   1:10 (  0,  9)   1:10 (  0, 79)
P/2015 X6 (PanSTARRS)               09 07 +17.2  22.1   4:22 (266, 25)   4:27 (245,  5)
7P/Pons-Winnecke                    07 55 +25.6  22.1   4:22 (266, 43)   4:27 (227, 12)
2018 BJ11                           06 24 +26.7  22.2   4:22 (279, 62)   4:27 (209, 22)
P/2010 H2 (Vales)                   14 29 -11.8  22.2  19:23 ( 71,  6)  19:19 ( 90, 21)
P/2000 R2 (LINEAR)                  17 30 -14.1  22.2  19:23 ( 34, 34)  19:19 (123, 58)
P/2011 V1 (Boattini)                14 16 -14.1  22.2  19:23 ( 71,  2)  19:19 ( 86, 20)
147P/Kushida-Muramatsu              12 15 +00.3  22.2  19:23 (100,-14)  19:19 ( 81,-13)
198P/ODAS                           06 04 +24.8  22.3   4:22 (288, 66)   4:27 (205, 26)
249P/LINEAR                         07 28 +17.5  22.4   4:22 (281, 45)   4:27 (227, 22)
231P/LINEAR-NEAT                    05 26 +11.3  22.4   4:22 (324, 62)   4:27 (200, 41)
175P/Hergenrother                   07 30 +20.6  22.7   4:22 (276, 46)   4:27 (226, 19)
316P/LONEOS-Christensen             08 55 +10.0  22.7   4:22 (274, 23)   4:27 (248, 12)
311P/PanSTARRS                      15 19 -20.3  22.7  19:23 ( 56, 10)  19:19 ( 89, 36)
367P/Catalina                       18 21 -31.2  22.9  19:23 ( 14, 22)  19:19 (103, 77)
412P/WISE                           05 04 +31.4  23.0   4:22 (289, 80)   4:27 (189, 23)
489P/Denning                        07 55 +24.1  23.0   4:22 (268, 43)   4:27 (228, 13)
63P/Wild 1                          06 24 +42.9  23.4   4:22 (243, 65)   4:27 (201,  8)
304P/Ory                            17 49 -25.8  23.7  19:23 ( 24, 25)  19:19 (109, 68)
2008 BJ22                           15 44 -09.4  23.9  19:23 ( 60, 22)  19:19 (104, 35)
P/2008 Y12 = P/2014 K3 (SOHO)       16 10 -37.4  27.7  19:23 ( 37,  5)  19:19 ( 72, 52)

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