Weekly Information about Bright Comets (2025 Jan. 18: North)

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Updated on January 18, 2025
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Northern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2024 G3 ( ATLAS )

It approached to Sun down to 0.09 a.u. on Jan. 13. It brightened up to -2 mag and it was detected even in the daylight. Now it is -1.2 mag (Jan. 15, Marco Goiato). Fading rapidly. In the Northern Hemisphere, it will never be observable after this. It stays extremely low in the Southern Hemisphere. But it will become high in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  20 57.19  -23 51.6   1.024   0.243    13    0.9  18:12 ( 62, -3)  
Jan. 25  21 50.37  -31 11.5   1.230   0.486    21    4.3  18:18 ( 54, -4)  

* C/2023 A3 ( Tsuchinshan-ATLAS )

It brightened up to -3 mag due to the forward scattering on Oct. 9 in the SOHO coronagraph images (Q.-c. Zhang, Charles S. Morris). It became a great comet of 0 mag on the ground. Now it is 10.5 mag (Jan. 14, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in January. In the Southern Hemisphere, it is not observable now, but it will appear in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  19 56.04    7 55.2   3.049   2.234    28   11.0   5:38 (259, -1)  
Jan. 25  20  1.30    8 41.1   3.154   2.337    28   11.3   5:35 (262,  3)  

* 249P/LINEAR

It has not been observed yet in this apparition. It brightens up to 11.5 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in March. Now it is not observable. It will appear in March in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  18 52.27  -21 56.2   1.476   0.592    15   12.7   5:38 (293, -6)  
Jan. 25  19 46.86  -19 18.0   1.469   0.527     9   11.9   5:35 (287,-10)  

* 21P/Giacobini-Zinner

Brightening gradually. Now it is not observable. It will brighten up to 10 mag in spring. But the condition of this apparition is bad. It is not observable when the comet is bright.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  19 55.48   -2 25.9   2.263   1.364    18   13.0   5:38 (268, -7)  
Jan. 25  20 20.00   -1 57.8   2.212   1.305    17   12.6   5:35 (268, -7)  

* 13P/Olbers

It returned for the first time in 68 years. It brightened up to 6.2 mag in early summer (July 1, Virgilio Gonano). Fading slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  17 49.58  -17  8.3   3.739   2.938    30   13.0   5:38 (298,  9)  
Jan. 25  17 58.04  -17 41.1   3.753   3.010    35   13.1   5:35 (301, 11)  

* C/2022 E2 ( ATLAS )

Now it is 12.8 mag (Jan. 17, Osamu Miyazaki). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after April. In the Southern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   1 41.95   58  8.6   3.459   3.836   105   13.1  18:42 (164, 65)  
Jan. 25   1 34.39   56 15.9   3.584   3.854    98   13.3  18:48 (151, 63)  

* 29P/Schwassmann-Wachmann 1

Major outburst occured between Nov. 1 and 2. Another outburst occured in late November. Now it is 11.5 mag (Jan. 5, Chris Wyatt). It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  10  6.47    8 59.4   5.406   6.257   147   13.6   2:18 (  0, 64)  
Jan. 25  10  3.88    9  6.9   5.352   6.258   154   13.6   1:48 (  0, 64)  

* C/2022 QE78 ( ATLAS )

Now it is 14.1 mag (Dec. 23, ATLAS Chile). It stays 14 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   6 23.79    6 22.8   4.851   5.744   152   14.1  22:32 (  0, 61)  
Jan. 25   6 21.35    7  1.0   4.880   5.729   146   14.1  22:02 (  0, 62)  

* C/2023 C2 ( ATLAS )

It brightened up to 12.7 mag in summer (Aug. 7, Thomas Lehmann). Now it is 14.2 mag (Dec. 10, Ken-ichi Kadota). It stays 15 mag for a while. Now it is not observable. It will appear in February in the Northern Hemisphere, or in March in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  20 37.97   -7  7.6   3.396   2.468    16   14.1  18:42 ( 84, -3)  
Jan. 25  20 49.22   -5  3.6   3.429   2.490    14   14.1  18:48 ( 89, -6)  

* 12P/Pons-Brooks

It returns for the first time in 70 years. It brightened up to 3.7 mag in early April (Apr. 6, Jose Guilherme Aguiar). Now it is 15.0 mag (Jan. 10, Thomas Lehmann). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in February. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  16 50.68  -48 40.7   4.451   3.846    46   14.1   5:38 (329, -5)  
Jan. 25  16 57.22  -48 53.0   4.451   3.918    51   14.2   5:35 (332, -3)  

* C/2021 G2 ( ATLAS )

Now it is 13.6 mag (Jan. 5, Chris Wyatt). It stays 14 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  15 13.76  -18 22.5   5.389   5.083    66   14.2   5:38 (330, 31)  
Jan. 25  15 18.31  -18  2.9   5.294   5.094    72   14.2   5:35 (335, 33)  

* C/2024 J2 ( Wierzchos )

Brightened rapidly. Now it is 14.9 mag (Dec. 29, Ken-ichi Kadota). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  20 17.96   30 14.8   2.430   1.967    51   14.3  18:42 (117, 14)  
Jan. 25  20 42.44   29 16.2   2.442   1.934    48   14.2  18:48 (118, 12)  

* 333P/LINEAR

It approached to Earth down to 0.55 a.u. in early December, and it brightened up to 10.7 mag (Dec. 5, Mike Olason). Now it is 14.2 mag (Jan. 12, Thomas Lehmann). Fading rapidly. It will be fainter than 18 mag in March. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  22  9.92   32 42.3   1.442   1.305    61   14.4  18:42 (108, 36)  
Jan. 25  22 19.48   30 19.5   1.631   1.355    56   15.1  18:48 (108, 31)  

* P/2023 S1

Now it is 14.4 mag (Jan. 9, Thomas Lehmann). It stays 15 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   9  7.60   19  0.3   1.670   2.629   163   14.5   1:19 (  0, 74)  
Jan. 25   9  2.10   18 56.4   1.647   2.626   172   14.5   0:46 (  0, 74)  

* C/2022 N2 ( PanSTARRS )

It is expected to brighten up to 13 mag in 2025 autumn, and it will be observable in good condition. Now it is 14.8 mag (Jan. 14, Ken-ichi Kadota). It stays 14 mag for a while. It will be unobservable in February in the Southern Hemisphere, or in March in the Northern Hemisphere. But it will be observable again in May in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  23 18.57   -0 57.5   4.715   4.187    52   14.6  18:42 ( 63, 32)  
Jan. 25  23 25.33   -0 13.4   4.770   4.163    47   14.6  18:48 ( 68, 28)  

* 37P/Forbes

Now it is 13.4 mag (Dec. 19, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be unobservable in February. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  21 41.45  -11 17.9   2.708   1.876    26   14.7  18:42 ( 71,  7)  
Jan. 25  21 58.26   -9 31.5   2.770   1.909    23   15.0  18:48 ( 75,  5)  

* 48P/Johnson

Now it is 16.6 mag (Oct. 9, Hidetaka Sato). It stays 15 mag for a while. Now it is not observable. It will appear in March in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  20 32.31  -21 34.8   3.007   2.036     7   15.2  18:42 ( 72,-12)  
Jan. 25  20 50.05  -20 51.5   3.006   2.027     5   15.1  18:48 ( 75,-15)  

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.1 mag (Jan. 9, Thomas Lehmann). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   3 33.28  -69 43.7  15.700  15.532    78   15.4  19:40 (  0,-15)  
Jan. 25   3 32.25  -69 25.1  15.690  15.508    77   15.4  19:12 (  0,-14)  

* 43P/Wolf-Harrington

Now it is 15.7 mag (Jan. 10, Ken-ichi Kadota). It stays 16 mag for a while. It will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   1 55.77   14  5.2   2.570   2.816    94   15.6  18:42 ( 25, 68)  
Jan. 25   2  1.65   14 14.3   2.643   2.793    88   15.6  18:48 ( 40, 65)  

* C/2024 A1 ( ATLAS )

Now it is 15.8 mag (Jan. 6, A. Pearce, T. Lovejoy). It stays 16 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   7 14.88  -19 47.7   3.295   4.081   138   15.7  23:22 (  0, 35)  
Jan. 25   7  6.69  -17 53.1   3.278   4.062   137   15.6  22:46 (  0, 37)  

* 496P/2024 S3 ( Hill )

First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 16.6 mag (Jan. 7, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 27.78   18 55.1   1.214   1.725   102   15.8  18:42 (  5, 74)  
Jan. 25   2 36.65   20 50.2   1.249   1.699    98   15.7  18:48 ( 27, 75)  

* C/2024 B1 ( Lemmon )

It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  17 29.04   17 47.4   2.551   2.115    53   15.7   5:38 (271, 34)  
Jan. 25  17 37.56   16 56.0   2.574   2.172    55   15.9   5:35 (275, 37)  

* 472P/2023 RL75 ( NEAT-LINEAR )

Now it is 15.8 mag (Jan. 3, Ken-ichi Kadota). Fading slowly. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   6 12.97    9 30.3   2.732   3.630   152   15.8  22:21 (  0, 65)  
Jan. 25   6 10.44    9 41.7   2.795   3.647   145   15.9  21:51 (  0, 65)  

* C/2023 H5 ( Lemmon )

Now it is 16.1 mag (Jan. 12, ATLAS-HKO, Haleakala). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  12 27.10   42 57.0   3.938   4.518   120   15.8   4:38 (180, 82)  
Jan. 25  12 26.73   45 21.3   3.867   4.501   124   15.8   4:10 (180, 80)  

* C/2023 T3 ( Fuls )

Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  13  3.73  -32 53.5   3.412   3.549    89   15.9   5:14 (  0, 22)  
Jan. 25  13  8.77  -33 40.2   3.322   3.548    95   15.8   4:52 (  0, 21)  

* (465402) 2008 HW1

Peculiar asteroid moving along a cometary orbit. It approaches to Sun down to 0.1 a.u. on Jan. 29. It brightens up to 14.5 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in February. Now it is not observable. It will appear in March in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  18 56.88  -19 45.3   1.355   0.475    14   17.8   5:38 (291, -5)  
Jan. 25  20  6.17  -19 11.5   1.208   0.246     5   15.8   5:35 (284,-13)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.5 mag (Dec. 24, Katsumi Yoshimoto). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   5 34.78   21 49.0   6.928   7.766   146   15.9  21:43 (  0, 77)  
Jan. 25   5 31.49   22  2.2   7.056   7.820   138   15.9  21:12 (  0, 77)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March in 2024 (Feb. 25, 2024, Thomas Lehmann). Now it is 15.3 mag (Dec. 28, Thomas Lehmann). Fading slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it is not observable now, but it will appear in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  21 40.97   30 57.5   4.855   4.397    57   15.9  18:42 (109, 30)  
Jan. 25  21 49.43   30 57.6   4.979   4.465    53   16.0  18:48 (112, 25)  

* C/2024 Y1 ( Masek )

Bright new comet. Now it is 14.9 mag (Jan. 2, Martin Masek). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 19.35  -50 36.9   1.020   1.251    77   16.0  18:42 (  2,  5)  
Jan. 25   2 54.41  -41 22.5   1.056   1.341    82   16.4  18:48 (  2, 14)  

* C/2024 M1 ( ATLAS )

Almost stellar. It brightened up to 13.7 mag from late November to early December (Dec. 5, Toshihiko Ikemura, Hirohisa Sato). Now it is 16.4 mag (Jan. 12, Thomas Lehmann). Fading gradually. It will be fainter than 18 mag in March. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 33.58   45 15.2   1.274   1.861   110   16.2  18:42 (180, 80)  
Jan. 25   2 25.29   47 15.1   1.412   1.897   103   16.4  18:48 (151, 75)  

* C/2022 R6 ( PanSTARRS )

Now it is 16.0 mag (Jan. 11, ATLAS South Africa). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   6 49.21  -29 12.7   6.087   6.730   127   16.2  22:57 (  0, 26)  
Jan. 25   6 46.69  -28 33.5   6.090   6.720   126   16.2  22:27 (  0, 26)  

* C/2023 F3 ( ATLAS )

Now it is 16.5 mag (June 6, Giuseppe Pappa). It stays 16 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  13 32.86  -45 44.3   5.274   5.192    79   16.3   5:38 (359,  9)  
Jan. 25  13 27.54  -46 16.9   5.159   5.191    86   16.2   5:11 (  0,  9)  

* 49P/Arend-Rigaux

It will brighten up to 14 mag in spring. Now it is 16.0 mag (Jan. 6, ATLAS Chile). Brightening gradually. It locates somewhat low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   0 44.25  -14 27.0   1.797   1.689    67   16.5  18:42 ( 33, 34)  
Jan. 25   0 57.54  -12  9.3   1.813   1.652    64   16.2  18:48 ( 39, 34)  

* 30P/Reinmuth 1

Now it is 17.3 mag (Jan. 5, ATLAS-HKO, Haleakala). It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  14 31.66   -6 32.4   2.210   2.261    80   16.3   5:38 (337, 46)  
Jan. 25  14 40.27   -6 49.6   2.159   2.296    85   16.4   5:35 (343, 47)  

* C/2019 U5 ( PanSTARRS )

Now it is 15.8 mag (Jan. 5, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   6  5.99  -50 29.1   6.321   6.638   104   16.4  22:13 (  0,  5)  
Jan. 25   5 57.52  -49 52.5   6.386   6.682   103   16.4  21:37 (  0,  5)  

* C/2023 Q1 ( PanSTARRS )

Now it is 15.2 mag (Jan. 14, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in April. It is brighter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   8  9.50   75  0.4   1.929   2.626   125   16.4   0:23 (180, 50)  
Jan. 25   7 59.17   74  5.4   1.954   2.642   124   16.4  23:40 (180, 51)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 15.8 mag (Dec. 7, A. Pearce). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. It locates somewhat low in the Southern Hemisphere. But it will become high in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  21 20.84  -60 43.8   7.192   6.502    42   16.4  18:42 ( 32,-25)  
Jan. 25  21 25.87  -60 29.3   7.246   6.557    42   16.5  18:48 ( 34,-28)  

* 65P/Gunn

Now it is 16.2 mag (July 30, Thomas Lehmann). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  16 59.02  -22 53.5   3.679   3.018    41   16.6   5:38 (311, 13)  
Jan. 25  17 10.08  -23 20.0   3.604   3.010    46   16.6   5:35 (314, 15)  

* C/2023 R1 ( PanSTARRS )

Now it is 16.9 mag (Jan. 5, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in February. But it will be observable again in March. In the Southern Hemisphere, it is not observable now, but it will appear in April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  22 12.99   17 15.8   5.894   5.316    50   16.6  18:42 ( 91, 30)  
Jan. 25  22 14.51   17  4.7   5.931   5.274    44   16.6  18:48 ( 95, 23)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 17.1 mag (Dec. 30, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  12 39.89  -57 33.2   9.550   9.476    82   16.7   4:51 (  0, -3)  
Jan. 25  12 39.36  -58  6.7   9.515   9.520    87   16.7   4:23 (  0, -3)  

* C/2024 L5 ( ATLAS )

Now it is 16.7 mag (Jan. 7, E. Cortes). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  15 16.09  -30 40.2   3.789   3.466    63   16.8   5:38 (335, 19)  
Jan. 25  15 12.98  -30 53.2   3.647   3.458    71   16.7   5:35 (341, 21)  

* 487P/2024 N5 ( Siding Spring )

First return of a new periodic comet which brightened up to 16 mag in 2012. Now it is 15.9 mag (Jan. 7, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 43.44   56 33.1   1.429   2.028   113   16.8  18:53 (180, 68)  
Jan. 25   2 49.36   56 59.8   1.522   2.060   108   17.1  18:48 (174, 68)  

* (3200) Phaethon

Parent asteroid of Geminids meteor shower. Now it is 16.0 mag (Nov. 30, Katsumi Yoshimoto). It will brighten rapidly after this. It will be unobservable in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   1 34.09   17 38.3   1.019   1.422    90   16.8  18:42 ( 41, 68)  
Jan. 25   1 31.18   15 43.1   1.048   1.334    82   16.8  18:48 ( 54, 61)  

* 105P/Singer Brewster

It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  16 58.96  -17 44.6   2.665   2.052    42   16.9   5:38 (307, 17)  
Jan. 25  17 15.66  -17 45.9   2.614   2.052    45   16.8   5:35 (309, 19)  

* C/2022 L2 ( ATLAS )

Now it is 16.6 mag (Jan. 13, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in March. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   7 36.13  -42 35.6   3.590   4.125   116   16.9  23:42 (  0, 12)  
Jan. 25   7 20.74  -41 37.1   3.630   4.175   117   17.0  22:59 (  0, 13)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 16.9 mag (Dec. 20, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   0 45.06  -61 17.7  10.973  10.565    63   16.9  18:42 ( 13, -9)  
Jan. 25   0 45.55  -60 28.6  11.018  10.573    60   17.0  18:48 ( 17,-10)  

* C/2020 K1 ( PanSTARRS )

It brightened up to 12.1 mag in 2023 spring (May 20, 2023, Jose Guilherme de S. Aguiar). Now it is 16.6 mag (Dec. 21, ATLAS Chile). It stays 18 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   5 49.85  -37 40.6   5.882   6.350   114   17.1  21:57 (  0, 17)  
Jan. 25   5 45.34  -36 36.8   5.960   6.398   112   17.1  21:25 (  0, 18)  

* 276P/Vorobjov

Now it is 17.1 mag (Dec. 26, A. Pearce). It stays 18 mag for a while. It will be getting lower gradually after this, and it will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 43.15    8 44.4   3.558   3.903   103   17.1  18:52 (  0, 64)  
Jan. 25   2 45.83    8 53.3   3.663   3.904    96   17.1  18:48 ( 12, 64)  

* 32P/Comas Sola

It brightened up to 13.5 mag in last winter (Dec. 5, 2023, Chris Wyatt). Now it is 17.8 mag (Dec. 28, ATLAS-HKO, Haleakala). It stays 18 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  14 17.92   -7  3.7   2.988   3.034    83   17.1   5:38 (342, 46)  
Jan. 25  14 22.55   -7 25.5   2.925   3.071    89   17.2   5:35 (349, 47)  

* 305P/Skiff

Now it is 16.6 mag (Jan. 4, ATLAS Chile). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2  6.05    9 39.7   1.176   1.597    94   17.1  18:42 ( 15, 64)  
Jan. 25   2 26.01   10 24.2   1.260   1.635    92   17.3  18:48 ( 23, 64)  

* 130P/McNaught-Hughes

It brightened up to 14 mag from summer to autumn. Now it is 17.0 mag (Jan. 10, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2  4.82   10 34.1   2.554   2.815    94   17.1  18:42 ( 17, 65)  
Jan. 25   2 10.49   11 18.3   2.684   2.849    89   17.3  18:48 ( 32, 63)  

* 242P/Spahr

Now it is 17.3 mag (Jan. 13, ATLAS South Africa). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in April. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   3 45.88  -15  1.4   3.554   3.973   108   17.3  19:54 (  0, 40)  
Jan. 25   3 46.62  -14 19.8   3.637   3.974   102   17.3  19:27 (  0, 41)  

* P/2015 CD60 ( LINEAR )

Now it is 17.1 mag (Jan. 7, ATLAS-HKO, Haleakala). It will fade out rapidly after this. It will be fainter than 18 mag in February. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   7  2.50   16 33.7   1.015   1.984   165   17.3  23:10 (  0, 71)  
Jan. 25   6 58.75   15 22.4   1.046   1.994   158   17.4  22:39 (  0, 70)  

* C/2024 G2 ( ATLAS )

Now it is 17.4 mag (Jan. 4, B. Lutkenhoner, E. Cortes). It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  12 56.28  -48 35.2   5.462   5.457    84   17.6   5:07 (  0,  6)  
Jan. 25  12 52.73  -48 37.8   5.347   5.447    90   17.5   4:36 (  0,  6)  

* (308607) 2005 WY3

Peculiar asteroid moving along a cometary orbit. Now it is 18.5 mag (Sept. 11, ATLAS-HKO, Haleakala). It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   3 21.08  -14 34.4   1.987   2.409   103   17.5  19:30 (  0, 41)  
Jan. 25   3 23.57  -13 49.0   2.017   2.364    97   17.5  19:05 (  0, 41)  

* 154P/Brewington

It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 17.9 mag (Jan. 8, D29 Purple Mountain Observatory, XuYi Station). Fading gradually. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   9 15.14   33 23.1   1.786   2.727   158   17.5   1:27 (  0, 88)  
Jan. 25   9  6.29   33 23.0   1.819   2.777   163   17.6   0:51 (  0, 88)  

* C/2021 S4 ( Tsuchinshan )

Now it is 17.3 mag (Jan. 8, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   7 23.99   41 57.2   6.212   7.131   157   17.5  23:32 (180, 83)  
Jan. 25   7 21.11   41 54.0   6.255   7.146   152   17.6  23:02 (180, 83)  

* 492P/2024 O3 ( LINEAR )

First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 17.2 mag (Dec. 27, Michael Jager). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   9 28.95   31 59.4   1.626   2.560   157   17.6   1:41 (  0, 87)  
Jan. 25   9 21.89   32 15.3   1.652   2.607   162   17.7   1:06 (  0, 87)  

* 195P/Hill

Now it is 16.9 mag (Jan. 9, ATLAS South Africa). It stays 18 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   6 32.16   -8 50.2   3.702   4.532   143   17.6  22:40 (  0, 46)  
Jan. 25   6 28.53   -8 53.8   3.734   4.526   139   17.6  22:09 (  0, 46)  

* P/2019 Y3 ( Catalina )

It has not been observed yet in this apparition. It will approach to Earth down to 0.3 a.u. in March, and it is expected to brighten up to 16 mag. Brightening gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   2 19.37  -24 48.7   0.630   1.128    85   18.0  18:42 (  4, 30)  
Jan. 25   2 23.93  -20 40.2   0.587   1.076    82   17.7  18:48 ( 12, 34)  

* C/2024 E1 ( Wierzchos )

It is expected to brighten up to 5 mag in 2026 January. Now it is 17.6 mag (Jan. 4, ATLAS-HKO, Haleakala). Brightening slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  17 36.62   40 55.0   5.397   5.143    69   17.8   5:38 (243, 42)  
Jan. 25  17 43.32   41 14.5   5.298   5.071    71   17.7   5:35 (244, 45)  

* (468861) 2013 LU28

Now it is 18.0 mag (Aug. 18, Taras Prystavski). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18   7  7.06   37  1.7   7.895   8.826   160   17.8  23:15 (180, 88)  
Jan. 25   7  1.47   36 45.3   7.937   8.831   153   17.8  22:42 (180, 88)  

* C/2019 T4 ( ATLAS )

It brightened up to 11 mag in 2022 spring. Now it is 18.0 mag (Nov. 12, D. Buczynski). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  18 25.56   24 48.3   9.034   8.447    50   17.9   5:38 (257, 26)  
Jan. 25  18 29.74   25  8.8   9.046   8.488    52   17.9   5:35 (259, 30)  

* 323P/SOHO

It will approach to Sun down to 0.04 a.u. on Mar. 14. It approaches to Earth down to 0.2 a.u. in mid February, and it will be observable in good condition. It will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 18  12 51.48   -7  3.8   0.873   1.457   103   23.1   5:02 (  0, 48)  
Jan. 25  13 10.36   -9 27.9   0.683   1.336   105   22.5   4:53 (  0, 45)  

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