Comets Waiting for First Observation

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Updated on July 12, 2026

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.

  • 107P/(4015) Wilson-Harrington was observed on 2026 June 8 at 18.5 mag by John Maikner, but not officially announced yet.
  • 161P/Hartley-IRAS was observed on 2026 June 25 at 19.3 mag by Martin Masek, but not officially announced yet.

  • P/2010 H2 ( Vales ) was fainter than 22 mag on 2025 Jan. 27 (Erwin Schwab).
  • P/2009 Y2 ( Kowalski ) was fainter than 19.5 mag on 2026 July 6 (Jean-Francois Soulier).
  • 11P/Tempel-Swift-LINEAR was fainter than 20 mag on 2026 July 9 (Jean-Francois Soulier).
  • 324P/La Sagra was fainter than 20 mag on 2026 May 26 (Jean-Francois Soulier).
  • 391P/Kowalski was fainter than 20 mag on 2026 June 20 (Jean-Francois Soulier).
  • 489P/Denning was fainter than 21 mag on 2026 Apr. 21 (Stephane Garro).

2026 July 14 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)
161P/Hartley-IRAS                   03 18 -20.8  16.9   3:13 (298,  3)   5:36 (253, 57)
141P/Machholz 2                     08 06 +12.5  17.1  20:57 (121,-19)  18:35 (101, -6)
114P/Wiseman-Skiff                  04 33 +31.3  17.4   3:13 (244, 18)   5:36 (223,  7)
P/1999 J6 (SOHO)                    06 17 +08.7  18.3   3:13 (249,-14)   5:36 (256,  4)
407P/PanSTARRS-Fuls                 10 20 +14.4  18.4  20:57 (102,  7)  18:35 (123, 18)
112P/Urata-Niijima                  02 60 +07.4  18.5   3:13 (278, 25)   5:36 (219, 39)
373P/Rinner                         05 42 +19.4  18.6   3:13 (245, -1)   5:36 (243,  4)
107P/(4015) Wilson-Harrington       15 05 -18.1  19.0  20:57 ( 23, 33)  19:36 (180, 73)
P/2004 V5 (LINEAR-Hill)             06 06 +34.0  19.0   3:13 (230,  4)   5:36 (235, -9)
383P/Christensen                    01 57 +21.1  19.1   3:13 (274, 45)   5:36 (195, 32)
P/2011 N1 (ASH)                     22 01 -50.8  19.2   2:35 (  0,  4)   2:35 (  0, 74)
320P/McNaught                       02 10 +17.3  19.3   3:13 (277, 40)   5:36 (200, 35)
139P/Vaisala-Oterma                 00 03 +03.1  19.4   3:13 (324, 53)   4:37 (180, 52)
P/2009 B1 (Boattini)                05 32 +35.1  19.5   3:13 (234, 10)   5:36 (229, -4)
P/2011 V1 (Boattini)                01 58 +05.7  19.5   3:13 (291, 36)   5:36 (201, 47)
324P/La Sagra                       20 32 +00.5  19.9   1:07 (  0, 56)   1:07 (180, 54)
2000 XO8                            03 46 +14.0  19.9   3:13 (266, 19)   5:36 (226, 28)
P/2009 Y2 (Kowalski)                03 01 +38.4  20.0   3:13 (246, 38)   5:36 (203, 12)
69P/Taylor                          04 35 +07.4  20.0   3:13 (264,  5)   5:36 (241, 24)
P/2020 G1 (Pimentel)                20 40 +08.1  20.1   1:15 (  0, 63)   1:15 (180, 47)
304P/Ory                            07 40 +22.8  20.1  20:57 (134,-16)  18:35 (106,-17)
469P/PanSTARRS                      17 10 +04.6  20.2  21:42 (  0, 60)  21:42 (180, 50)
P/2012 T3 (PanSTARRS)               16 24 -14.2  20.3  20:57 (  1, 41)  20:55 (180, 69)
11P/Tempel-Swift-LINEAR             23 54 +21.2  20.4   3:13 (305, 69)   4:28 (180, 34)
P/2010 D2 (WISE)                    23 59 +56.4  20.4   3:13 (206, 65)   4:33 (180, -1)
186P/Garradd                        08 12 +31.6  20.6  20:57 (134, -5)  18:35 (118,-16)
(65803) Didymos                     15 60 -22.2  20.6  20:57 (  7, 32)  20:31 (180, 77)
P/2011 P1 (McNaught)                15 10 -22.8  20.7  20:57 ( 20, 29)  19:41 (180, 78)
P/2013 T2 (Schwartz)                02 17 +14.2  20.7   3:13 (279, 37)   5:36 (203, 38)
P/2023 B3 (PanSTARRS)               15 37 -08.6  20.7  20:57 ( 17, 45)  20:08 (180, 64)
357P/Hill                           21 04 -25.4  20.8   1:39 (  0, 30)   1:39 (180, 80)
P/2015 X3 (PanSTARRS)               02 02 -14.7  20.8   3:13 (307, 21)   5:36 (217, 66)
P/2007 K2 (Gibbs)                   08 03 +15.3  20.8  20:57 (124,-18)  18:35 (103, -8)
(944) Hidalgo                       15 56 -61.5  20.8  20:57 (  3, -7)  20:29 (  0, 63)
P/2022 BV9 (Lemmon)                 12 30 -12.5  20.9  20:57 ( 61, 17)  18:35 (131, 59)
156P/Russell-LINEAR                 17 51 -45.3  20.9  22:22 (  0, 10)  22:22 (  0, 80)
163P/NEAT                           04 09 +11.9  20.9   3:13 (264, 13)   5:36 (232, 26)
P/2017 U3 (PanSTARRS)               22 40 -03.7  20.9   3:13 (359, 51)   3:14 (180, 59)
P/1996 R2 (Lagerkvist)              02 42 +14.9  20.9   3:13 (274, 32)   5:36 (210, 35)
412P/WISE                           10 32 +09.1  21.0  20:57 ( 96,  7)  18:35 (121, 24)
359P/LONEOS                         18 13 -12.5  21.0  22:44 (  0, 42)  22:44 (180, 68)
231P/LINEAR-NEAT                    07 13 +18.0  21.0   3:13 (231,-18)   5:36 (256,-12)
187P/LINEAR                         10 48 +18.4  21.0  20:57 (102, 15)  18:35 (131, 20)
82P/Gehrels 3                       06 09 +23.0  21.0   3:13 (238, -4)   5:36 (244, -3)
P/2017 D1 (Fuls)                    03 56 +08.6  21.1   3:13 (269, 14)   5:36 (232, 30)
312P/NEAT                           17 23 +00.9  21.1  21:54 (  0, 56)  21:54 (180, 54)
P/2010 H4 (Scotti)                  12 07 +00.5  21.1  20:57 ( 75, 21)  18:35 (136, 45)
391P/Kowalski                       15 06 +05.7  21.1  20:57 ( 37, 55)  19:38 (180, 49)
340P/Boattini                       02 46 +18.0  21.1   3:13 (270, 33)   5:36 (209, 31)
348P/PanSTARRS                      23 18 +05.2  21.1   3:13 (341, 59)   3:52 (180, 50)
P/2012 O2 (McNaught)                02 10 -10.5  21.2   3:13 (302, 23)   5:36 (216, 61)
397P/Lemmon                         17 04 -36.8  21.2  21:35 (  0, 18)  21:35 (  0, 88)
P/2019 A4 (PanSTARRS)               02 50 +03.4  21.3   3:13 (283, 24)   5:36 (219, 44)
311P/PanSTARRS                      23 39 +03.8  21.3   3:13 (332, 56)   4:13 (180, 51)
P/2010 H2 (Vales)                   18 15 -34.5  21.4  22:46 (  0, 21)  22:46 (180, 89)
230P/LINEAR                         17 10 -15.5  21.5  21:41 (  0, 39)  21:41 (180, 71)
P/2010 C1 (Scotti)                  05 29 +16.1  21.5   3:13 (250, -1)   5:36 (243,  9)
257P/Catalina                       12 34 -05.0  21.5  20:57 ( 66, 22)  18:35 (141, 54)
P/2005 T3 (Read)                    02 34 +15.6  21.5   3:13 (275, 34)   5:36 (207, 35)
2010 RH69                           11 41 +00.8  21.6  20:57 ( 80, 16)  18:35 (129, 41)
246P/NEAT                           07 36 +30.5  21.7  20:57 (139,-11)  18:35 (113,-22)
P/2009 WX51 (Catalina)              13 25 -17.5  21.7  20:57 ( 47, 22)  18:35 (152, 71)
2019 OE31                           13 19 -07.1  21.7  20:57 ( 56, 29)  18:35 (158, 61)
176P/(118401) LINEAR                14 31 -15.1  21.8  20:57 ( 33, 33)  19:03 (180, 70)
2015 VA108                          01 10 +17.4  21.8   3:13 (288, 52)   5:36 (182, 37)
282P/(323137) 2003 BM80             04 11 +25.0  21.8   3:13 (252, 19)   5:36 (224, 15)
P/2021 A5 (PanSTARRS)               04 41 +36.6  21.9   3:13 (238, 20)   5:36 (221,  2)
P/2017 FL36 (PanSTARRS)             07 45 +25.1  22.0  20:57 (134,-14)  18:35 (109,-17)
(399457) 2002 PD43                  23 18 +02.3  22.0   3:13 (342, 56)   3:52 (180, 53)
P/2004 FY140 (LINEAR)               13 12 -09.9  22.6  20:57 ( 55, 26)  18:35 (152, 62)
2008 BJ22                           21 20 -08.2  22.7   1:55 (  0, 47)   1:55 (180, 63)
147P/Kushida-Muramatsu              13 28 -07.1  22.7  20:57 ( 54, 30)  18:35 (162, 61)
P/2019 U4 (PanSTARRS)               04 53 +17.5  23.0   3:13 (254,  7)   5:36 (236, 14)
P/1999 XN120 (Catalina)             08 09 +18.9  23.1  20:57 (126,-14)  18:35 (106, -9)
P/2015 X6 (PanSTARRS)               11 32 +07.4  23.1  20:57 ( 86, 18)  18:35 (132, 35)
316P/LONEOS-Christensen             09 60 +03.3  23.3  20:57 ( 96, -3)  18:35 (110, 22)
366P/Spacewatch                     00 07 -10.5  23.4   3:13 (331, 40)   4:41 (180, 65)
168P/Hergenrother                   04 48 +34.8  23.5   3:13 (239, 17)   5:36 (223,  2)
317P/WISE                           01 36 +23.0  23.5   3:13 (275, 50)   5:36 (189, 31)
P/2016 G1 (PanSTARRS)               05 44 +16.7  23.7   3:13 (247, -3)   5:36 (245,  6)
P/2019 S3 (PanSTARRS)               06 09 +17.7  24.1   3:13 (242, -7)   5:36 (248,  0)
489P/Denning                        13 20 -10.4  24.2  20:57 ( 53, 27)  18:35 (156, 64)
P/2012 O1 (McNaught)                05 46 +22.1  24.8   3:13 (242,  0)   5:36 (241,  2)
198P/ODAS                           09 20 +16.1  25.0  20:57 (112, -4)  18:35 (114,  6)
2018 OR                             07 43 +19.9  25.3  20:57 (131,-18)  18:35 (104,-15)

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