Comets Waiting for First Observation

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Updated on December 20, 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.

  • 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 December 20 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)
218P/LINEAR                         13 42 -10.7  18.3   5:32 (319, 34)   2:55 (269, 20)
407P/PanSTARRS-Fuls                 07 49 +24.3  18.5   1:56 (  0, 79)   1:56 (180, 31)
P/2004 V5 (LINEAR-Hill)             04 01 +29.2  18.9  22:04 (  0, 84)  22:04 (180, 26)
(248590) 2006 CS                    02 44 -67.0  19.1  20:46 (  0,-12)  20:59 (  2, 58)
340P/Boattini                       22 22 -08.5  20.0  18:22 ( 38, 39)  20:59 ( 96, 22)
P/2009 B1 (Boattini)                22 44 +15.1  20.0  18:22 ( 53, 61)  20:59 (119, 12)
317P/WISE                           18 49 -21.0  20.3  18:22 ( 68, -6)  20:59 ( 54,-11)
186P/Garradd                        07 33 +46.5  20.3   1:40 (180, 79)   1:40 (180,  9)
379P/Spacewatch                     14 08 -11.0  20.3   5:32 (313, 30)   2:55 (274, 15)
82P/Gehrels 3                       02 58 +17.0  20.4  21:02 (  0, 72)  21:02 (180, 38)
P/2005 S2 (Skiff)                   21 12 -15.2  20.5  18:22 ( 50, 23)  20:59 ( 80, 12)
304P/Ory                            20 37 -20.5  20.6  18:22 ( 52, 14)  20:59 ( 71,  8)
P/2012 O1 (McNaught)                22 16 -17.8  20.6  18:22 ( 34, 30)  20:59 ( 86, 26)
139P/Vaisala-Oterma                 20 53 -15.5  20.6  18:22 ( 53, 20)  20:59 ( 77,  8)
412P/WISE                           04 39 +38.1  20.7  22:42 (180, 87)  22:42 (180, 17)
P/2017 B4 (PanSTARRS)               10 29 +17.0  20.8   4:35 (  0, 72)   2:55 (209, 33)
P/1999 RO28 (LONEOS)                01 00 -09.2  20.8  19:06 (  0, 46)  20:59 (128, 53)
P/2012 K3 (Gibbs)                   15 59 -10.6  20.8   5:32 (292, 11)   2:55 (289, -8)
P/2017 FL36 (PanSTARRS)             03 50 +40.9  20.9  21:53 (180, 84)  21:53 (180, 14)
245P/WISE                           16 12 -36.4  20.9   5:32 (310, -8)   2:55 (311,  6)
373P/Rinner                         23 48 +07.4  20.9  18:22 ( 15, 62)  20:59 (125, 29)
469P/PanSTARRS                      15 38 -07.7  20.9   5:32 (293, 17)   2:55 (283, -6)
P/2022 BV9 (Lemmon)                 12 59 -12.7  21.0   5:32 (331, 37)   2:55 (265, 30)
246P/NEAT                           06 29 +31.4  21.0   0:36 (  0, 86)   0:36 (180, 24)
(944) Hidalgo                       16 23 -54.3  21.1   5:32 (323,-20)   2:55 (326, 16)
2018 BJ11                           06 14 +27.9  21.1   0:21 (  0, 83)   0:21 (180, 27)
P/2011 V1 (Boattini)                17 20 -25.7  21.1   5:32 (292,-13)   2:55 (313,-12)
187P/LINEAR                         10 43 +17.5  21.2   4:50 (  0, 72)   2:55 (213, 31)
P/2010 C1 (Scotti)                  03 59 +10.0  21.2  22:02 (  0, 65)  22:02 (180, 45)
P/2011 N1 (ASH)                     19 26 -40.6  21.3  18:22 ( 48,-11)  20:59 ( 45,  8)
P/2010 H4 (Scotti)                  12 17 +00.1  21.3   5:32 (339, 53)   2:55 (246, 30)
P/2021 A5 (PanSTARRS)               22 49 +04.9  21.4  18:22 ( 39, 54)  20:59 (112, 20)
P/2011 P1 (McNaught)                15 20 -22.2  21.4   5:32 (307, 10)   2:55 (293,  6)
231P/LINEAR-NEAT                    04 59 +09.4  21.4  23:02 (  0, 64)  23:02 (180, 46)
P/2005 T3 (Read)                    00 36 +02.8  21.4  18:40 (  0, 58)  20:59 (132, 40)
P/2023 B3 (PanSTARRS)               15 31 -11.2  21.4   5:32 (297, 16)   2:55 (285, -2)
P/2010 D2 (WISE)                    21 33 +20.0  21.4  18:22 ( 79, 51)  20:59 (112, -4)
198P/ODAS                           07 11 +24.9  21.4   1:19 (  0, 80)   1:19 (180, 30)
2010 RH69                           11 51 -04.4  21.5   5:32 (350, 50)   2:55 (245, 38)
P/2010 T2 (PanSTARRS)               09 55 +22.0  21.5   4:02 (  0, 77)   2:55 (198, 31)
P/2015 X6 (PanSTARRS)               11 07 +09.1  21.5   5:13 (  0, 64)   2:55 (223, 35)
P/2019 S3 (PanSTARRS)               22 29 -14.3  21.5  18:22 ( 32, 35)  20:59 ( 91, 27)
P/2017 U3 (PanSTARRS)               20 38 -11.3  21.7  18:22 ( 59, 21)  20:59 ( 78,  3)
249P/LINEAR                         07 03 +15.0  21.9   1:10 (  0, 70)   1:10 (180, 40)
P/2019 A4 (PanSTARRS)               21 23 -21.7  22.0  18:22 ( 43, 20)  20:59 ( 76, 18)
489P/Denning                        12 04 +04.3  22.0   5:32 (342, 58)   2:55 (240, 30)
324P/La Sagra                       17 21 -26.5  22.0   5:32 (293,-14)   2:55 (314,-11)
2019 OE31                           13 34 -07.0  22.0   5:32 (318, 38)   2:55 (265, 19)
P/2010 H2 (Vales)                   16 39 -22.6  22.1   5:32 (295, -4)   2:55 (304, -8)
316P/LONEOS-Christensen             09 42 +02.3  22.2   3:48 (  0, 57)   2:55 (202, 51)
311P/PanSTARRS                      18 12 -23.7  22.3  18:22 ( 71,-14)  20:59 ( 46,-15)
P/2005 E1 (Tubbiolo)                16 53 -26.2  22.3   5:32 (296, -8)   2:55 (309, -7)
P/2000 R2 (LINEAR)                  21 28 -16.1  22.3  18:22 ( 46, 25)  20:59 ( 81, 16)
P/2016 G1 (PanSTARRS)               00 16 +00.6  22.5  18:22 (  1, 56)  20:59 (125, 38)
147P/Kushida-Muramatsu              13 43 -08.4  22.6   5:32 (317, 36)   2:55 (268, 18)
P/2015 R2 (PanSTARRS)               02 18 -03.0  22.7  20:22 (  0, 52)  20:59 (163, 57)
366P/Spacewatch                     20 17 -26.0  22.9  18:22 ( 52,  7)  20:59 ( 63,  7)
367P/Catalina                       20 26 -26.0  23.6  18:22 ( 50,  8)  20:59 ( 65,  9)
2008 BJ22                           18 01 -15.6  23.6  18:22 ( 79,-12)  20:59 ( 49,-23)

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