Weekly Information about Bright Comets (2025 Dec. 27: North)

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 Updated on December 26, 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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* 24P/Schaumasse

Now it is 9.9 mag (Dec. 22, Toru Yusa). It will turn to fade out rapidly after the peak. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  12 26.53   15 24.7   0.597   1.195    95    8.4   5:36 (340, 69)  
Jan.  3  12 58.09   14  1.1   0.593   1.186    94    8.2   5:38 (340, 68)

* C/2024 E1 ( Wierzchos )

It was originally expected to brighten up to 5 mag in January. But actually, the brightness evolution is slower than originally expected. It will be 8 mag at best. Now it is 9.6 mag (Dec. 10, Mike Olason). It brightens up to 7.5 mag, but it will turn to fade out rapidly after that. Now it is not observable. It will appear in January in the Southern Hemisphere, or in February in the Northern Hemisphere. Nagy Barnabas reported it is visible at 8 mag on Dec. 24 in the SOHO spacecraft LASCO images. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  18 47.04  -22 47.9   1.760   0.788     5    9.5  18:26 ( 71,-13)  
Jan.  3  19 12.21  -27 39.7   1.661   0.692     6    8.9  18:30 ( 67,-17)

* C/2025 A6 ( Lemmon )

It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Fading rapidly. In the Northern Hemisphere, it is not observable now, but it will appear in April. In the Southern Hemisphere, it will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  17 12.14  -37 39.5   2.027   1.161    20   11.0   5:36 (307,-13)  
Jan.  3  17 11.68  -40  0.2   2.065   1.276    27   11.7   5:38 (313,-10)

* C/2025 T1 ( ATLAS )

Now it is 9.8 mag (Dec. 18, Osamu Miyazaki). It will fade out rapidly after this. It will be fainter than 18 mag in April. In the Northern Hemisphere, it will be unobservable 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)  
Dec. 27  20 28.42    1 33.0   1.758   1.179    39   11.2  18:26 ( 76, 21)  
Jan.  3  20 41.19   -2  3.2   1.915   1.221    33   11.6  18:30 ( 76, 15)

* 88P/Howell

Brightening gradually. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it is not observable now, but it will appear in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  16 36.49  -22  1.5   2.462   1.618    24   12.3   5:36 (299,  3)  
Jan.  3  16 59.27  -22 52.6   2.401   1.580    26   12.0   5:38 (301,  3)

* 240P/NEAT

Now it is 12.1 mag (Dec. 16, Osamu Miyazaki). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually. The component B is brightening rapidly. Now it is bright as 14.1 mag (Dec. 20, ATLAS Chile). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   3 19.79   14 50.8   1.300   2.122   136   12.3  20:56 (  0, 70)  
Jan.  3   3 18.51   16 38.8   1.360   2.125   129   12.4  20:27 (  0, 72)

* 3I/2025 N1 ( ATLAS )

Third interstellar object in history following 1I/'Oumuamua and 2I/Borisov. The eccentricity is extremely big as 6. It approached to Sun down to 1.38 a.u. in late October. It brightened up to 8.9 mag in November (Nov. 12, Toshiyuki Takahashi). Now it is 11.6 mag (Dec. 22, Toru Yusa). Fading rapidly. It will be fainter than 18 mag in March. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  10  9.07   10  7.0   1.825   2.516   124   12.4   3:49 (  0, 65)  
Jan.  3   9 35.54   12 36.6   1.900   2.729   140   13.1   2:48 (  0, 67)

* 210P/Christensen

It brightened up to 9.5 mag in late November (Nov. 28, Michael Jager, Gerald Rhemann, E. Prosperi). Now it is 11.6 mag (Dec. 18, Osamu Miyazaki). Fading rapidly. It will be fainter than 18 mag in March. It will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  14 57.82   -8 28.8   1.032   0.870    51   12.8   5:36 (307, 29)  
Jan.  3  15  9.74   -8 31.1   1.098   0.972    55   13.5   5:38 (311, 32)

* 235P/LINEAR

It became brighter than expected. Now it is 13.9 mag (Dec. 8, Catalina Sky Survey). It stays 13 mag for a while. In the Southern Hemisphere, it will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  14 24.28  -15 13.5   2.345   1.978    56   13.2   5:36 (319, 29)  
Jan.  3  14 39.96  -16  2.1   2.285   1.980    59   13.2   5:38 (323, 30)

* C/2022 N2 ( PanSTARRS )

Now it is 13.0 mag (Dec. 16, Osamu Miyazaki). Fading slowly. 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)  
Dec. 27   3 11.82   24 45.5   3.267   4.040   136   13.6  20:48 (  0, 80)  
Jan.  3   3 12.06   24 35.0   3.361   4.060   129   13.7  20:21 (  0, 80)

* C/2025 R2 ( SWAN )

It brightened up to 5.2 mag in October (Oct. 11, Virgilio Gonano). Now it is 12.9 mag (Dec. 18, Toru Yusa). Fading rapidly. It will be fainter than 18 mag in March. 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)  
Dec. 27   0 52.60   11 23.4   1.622   2.056   101   13.8  18:30 (  0, 67)  
Jan.  3   1  2.86   12  9.9   1.806   2.158    96   14.3  18:30 ( 11, 67)

* 29P/Schwassmann-Wachmann 1

It brightened in outburst on Dec. 5. Now it is 12.5 mag (Dec. 22, Toru Yusa). It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  11 34.10   -3  9.9   6.064   6.306    99   13.9   5:13 (  0, 52)  
Jan.  3  11 34.46   -3 23.0   5.953   6.306   106   13.9   4:45 (  0, 51)

* C/2022 QE78 ( ATLAS )

Now it is 14.4 mag (Nov. 29, Purple Mountain Observatory, XuYi Station). It stays 15 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)  
Dec. 27   9 26.43   23 51.3   4.761   5.531   138   14.3   3:05 (  0, 79)  
Jan.  3   9 25.32   24 36.4   4.702   5.539   145   14.3   2:37 (  0, 79)

* C/2025 K1 ( ATLAS )

It brightened up to 9.3 mag in November (Nov. 2, Virgilio Gonano). Now it is 14.0 mag (Dec. 19, Toru Yusa). Fading rapidly. 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 be unobservable in February. The nucleus is split into three components. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   0 57.71   40 20.3   1.147   1.762   111   14.5  18:34 (180, 85)  
Jan.  3   0 57.26   37 18.8   1.372   1.876   104   15.1  18:30 (117, 85)

* C/2025 L1 ( ATLAS )

It is expected to brighten up to 13.5 mag and to be observable in good condition in 2026 spring. Brightening slowly. In the Northern Hemisphere, it will be unobservable temporarily in January. In the Southern Hemisphere, it will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  15 40.36  -38 50.1   2.364   1.694    37   14.7   5:36 (320,  0)  
Jan.  3  15 46.43  -36 54.3   2.275   1.684    42   14.5   5:38 (322,  4)

* C/2024 J3 ( ATLAS )

It will brighten up to 13 mag in 2026. Now it is 14.9 mag (Nov. 17, Alfons Diepvens). Brightening slowly. In the Northern Hemisphere, it will be unobservable temporarily in January. 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)  
Dec. 27  19 11.22   -4 51.0   5.706   4.807    21   14.8  18:26 ( 83,  2)  
Jan.  3  19 16.37   -4  5.1   5.688   4.773    19   14.8  18:30 ( 87, -3)

* C/2024 T5 ( ATLAS )

Now it is 14.5 mag (Dec. 15, ATLAS Chile). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in March. In the Southern Hemisphere, it stays observable in good condition. It is expected to brighten up to 11 mag in winter between 2026 and 2027. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   2 37.01  -41 48.0   5.477   5.676    96   14.8  20:13 (  0, 13)  
Jan.  3   2 35.84  -40 43.0   5.501   5.635    92   14.8  19:44 (  0, 14)

* C/2021 G2 ( ATLAS )

Now it is 14.4 mag (Oct. 11, Hiroshi Abe). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  16 46.22   -0  3.1   6.938   6.136    32   14.8   5:36 (280, 14)  
Jan.  3  16 51.49    0 18.5   6.916   6.166    37   14.8   5:38 (284, 19)

* 78P/Gehrels 2

It will brighten up to 12 mag in 2026 summer. Now it is 16.0 mag (Dec. 8, Taras Prystavski). Brightening slowly. It will be unobservable in January in the Southern Hemisphere, or in February in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  21 29.05  -10 37.0   3.035   2.460    46   15.0  18:26 ( 56, 25)  
Jan.  3  21 40.93   -9 50.0   3.069   2.430    42   14.8  18:30 ( 60, 22)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.9 mag (Nov. 28, Andrew Pearce). 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)  
Dec. 27   5  2.72  -74 54.3  14.537  14.414    80   14.9  22:36 (  0,-20)  
Jan.  3   4 58.06  -74 47.1  14.520  14.392    80   14.9  22:04 (  0,-20)

* C/2023 R1 ( PanSTARRS )

Now it is 15.3 mag (Dec. 4, Ken-ichi Kadota). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable temporarily in January. 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)  
Dec. 27  19 19.48   -1 33.9   4.562   3.701    25   15.3  18:26 ( 84,  5)  
Jan.  3  19 21.58   -1 59.3   4.578   3.685    21   15.3  18:30 ( 88, -1)

* C/2024 R4 ( PanSTARRS )

Brightening rapidly. It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 16.2 mag (Dec. 21, Alfons Diepvens). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after February. 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)  
Dec. 27  21 31.96   21  0.9   7.217   6.844    64   15.9  18:26 ( 86, 45)  
Jan.  3  21 33.76   21  8.4   7.261   6.805    58   15.8  18:30 ( 90, 39)

* C/2022 R6 ( PanSTARRS )

Now it is 16.1 mag (Dec. 20, ATLAS Chile). 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)  
Dec. 27   8 55.20  -11 34.4   5.956   6.617   128   16.1   2:34 (  0, 43)  
Jan.  3   8 53.31  -11 14.4   5.891   6.623   134   16.1   2:05 (  0, 44)

* C/2022 E2 ( ATLAS )

It was observed at 12-13 mag for a long time in 2024. Now it is 15.8 mag (Dec. 10, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after 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)  
Dec. 27  22 28.87   32 40.9   5.520   5.457    81   16.1  18:26 ( 96, 61)  
Jan.  3  22 30.55   31 43.4   5.664   5.498    75   16.2  18:30 ( 97, 54)

* C/2025 Q3 ( ATLAS )

Now it is 15.5 mag (Dec. 20, Toru Yusa). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March. In the Southern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   2  9.42   -4  5.4   1.659   2.230   112   16.1  19:45 (  0, 51)  
Jan.  3   2  5.35   -7 13.8   1.757   2.205   103   16.2  19:14 (  0, 48)

* C/2025 J1 ( Borisov )

Now it is 16.3 mag (Dec. 22, Jean-Claude Merlin). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   8 33.90   79 43.1   3.274   3.883   121   16.5   2:18 (180, 45)  
Jan.  3   7 34.73   79 24.9   3.232   3.860   123   16.4   0:52 (180, 46)

* 145P/Shoemaker-Levy 5

Now it is 16.4 mag (Dec. 6, Purple Mountain Observatory, XuYi Station). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  23 28.00   -4 48.4   1.909   1.918    75   16.5  18:26 ( 30, 46)  
Jan.  3  23 40.16   -2 47.6   1.966   1.908    72   16.5  18:30 ( 37, 46)

* 493P/2024 Q2 ( LONEOS )

Now it is 16.2 mag (Dec. 17, Yukihiro Sugiyama). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   4 32.56   53 19.4   2.988   3.825   143   16.5  22:09 (180, 72)  
Jan.  3   4 28.17   52 53.6   3.024   3.824   139   16.5  21:37 (180, 72)

* 40P/Vaisala 1

Now it is 15.1 mag (Dec. 18, Mitsunori Tsumura). It stays 17 mag for a while. In the Southern Hemisphere, it will be getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  15  7.10   -8 18.7   2.371   1.879    49   16.5   5:36 (305, 28)  
Jan.  3  15 23.84   -9  5.6   2.339   1.897    51   16.5   5:38 (308, 29)

* 261P/Larson

Now it is 16.2 mag (Dec. 14, Catalina Sky Survey). Fading slowly. It will be fainter than 18 mag in April. It will be unobservable in February in the Southern Hemisphere, or in April in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  22 14.50   -5 45.5   2.346   2.014    58   16.5  18:26 ( 50, 36)  
Jan.  3  22 28.95   -4 23.2   2.407   2.015    55   16.6  18:30 ( 55, 34)

* 164P/Christensen

Now it is 16.8 mag (Dec. 4, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in April. 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)  
Dec. 27  11 24.61   21 59.6   2.016   2.542   111   16.6   5:03 (  0, 77)  
Jan.  3  11 26.81   22 52.2   1.975   2.582   117   16.5   4:38 (  0, 78)

* C/2025 R3 ( PanSTARRS )

It is expected to brighten up to 7 mag in April. Now it is 16.5 mag (Dec. 21, Alfons Diepvens). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting lower gradually after this, and 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. At the high light, it is observable in the low sky before the perihelion passage in the Northern Hemisphere, or after the perihelion in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  22 15.02   21 23.1   2.287   2.195    72   16.7  18:26 ( 79, 54)  
Jan.  3  22 13.11   20 16.8   2.308   2.093    65   16.5  18:30 ( 83, 46)

* C/2024 A1 ( ATLAS )

Now it is 16.2 mag (Dec. 18, D. Buczynski). Fading slowly. 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)  
Dec. 27   8 27.33   54 28.4   3.423   4.234   141   16.5   2:07 (180, 71)  
Jan.  3   8 16.35   56 33.0   3.432   4.258   143   16.6   1:29 (180, 69)

* C/2023 C2 ( ATLAS )

It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 15.9 mag (Dec. 13, Alfons Diepvens). 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 will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  22 47.44   48 45.6   4.624   4.780    93   16.6  18:26 (131, 64)  
Jan.  3  22 54.42   48 24.1   4.746   4.835    89   16.7  18:30 (128, 60)

* 43P/Wolf-Harrington

Now it is 16.5 mag (Dec. 15, Alfons Diepvens). 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)  
Dec. 27  11 10.86   -6 42.0   2.244   2.652   103   16.7   4:49 (  0, 48)  
Jan.  3  11 13.67   -7 29.4   2.177   2.671   109   16.7   4:25 (  0, 47)

* C/2023 H5 ( Lemmon )

Now it is 16.6 mag (Dec. 13, Alfons Diepvens). It stays 17 mag for a while. 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)  
Dec. 27  18  9.38   62 33.5   4.523   4.560    85   16.7   5:36 (212, 29)  
Jan.  3  18 30.31   62 19.4   4.553   4.579    85   16.8   5:38 (213, 30)

* 195P/Hill

Now it is 16.9 mag (Nov. 22, Kunihiro Shima). It stays 17 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)  
Dec. 27   9 57.78  -30 54.0   4.130   4.488   105   16.8   3:36 (  0, 24)  
Jan.  3   9 56.66  -31 46.7   4.062   4.493   109   16.8   3:08 (  0, 23)

* C/2023 F3 ( ATLAS )

Now it is 16.7 mag (Dec. 17, ATLAS Chile). 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)  
Dec. 27  10 47.40  -24 52.5   5.493   5.741    99   16.8   4:26 (  0, 30)  
Jan.  3  10 42.35  -24 48.6   5.402   5.764   106   16.8   3:54 (  0, 30)

* C/2023 X2 ( Lemmon )

Now it is 17.0 mag (Nov. 29, Ken-ichi Kadota). It stays 17 mag for a while. 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)  
Dec. 27  18  7.87   84 18.5   4.703   5.089   107   16.8   5:36 (187, 35)  
Jan.  3  18 45.06   83 36.0   4.722   5.089   106   16.8   5:38 (188, 34)

* 47P/Ashbrook-Jackson

Now it is 15.7 mag (Dec. 19, Toru Yusa). Fading slowly. It will be fainter than 18 mag in April. It will be unobservable in February in the Southern Hemisphere, or in March in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  23 16.44   -1 48.1   2.934   2.829    74   16.9  18:26 ( 36, 47)  
Jan.  3  23 24.18   -0 41.5   3.028   2.834    69   17.0  18:30 ( 44, 45)

* C/2024 G6 ( ATLAS )

Now it is 17.0 mag (July 25, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  16 25.16   -7 16.1   7.250   6.441    32   17.0   5:36 (290, 14)  
Jan.  3  16 27.73   -6 46.6   7.178   6.438    38   17.0   5:38 (294, 20)

* C/2023 RS61 ( PanSTARRS )

Although it is around 20 mag usually, now it is bright in outburst. Now it is 17.6 mag (Dec. 11, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   2 43.71   37  5.2   8.101   8.784   131   17.0  20:20 (180, 88)  
Jan.  3   2 42.74   36 50.4   8.175   8.774   124   17.0  19:52 (180, 88)

* 93P/Lovas 1

Now it is 17.9 mag (Dec. 19, Kunihiro Shima). Brightening slowly. It will be unobservable in January in the Southern Hemisphere, or in March in the Northern Hemisphere. It will brighten up to 15.5 mag in spring. But it is not observable around the perihelion passage. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  22  5.17   -9 17.3   2.519   2.113    54   17.2  18:26 ( 49, 31)  
Jan.  3  22 17.06   -7 47.0   2.545   2.074    51   17.0  18:30 ( 55, 29)

* (306173) 2010 NK83

Peculiar asteroid moving along a cometary orbit. Now it is 18.1 mag (Oct. 5, ATLAS-HKO, Haleakala). Fading slowly. It will be fainter than 18 mag in March. 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)  
Dec. 27   8  3.91   22 28.7   1.617   2.550   156   17.3   1:43 (  0, 77)  
Jan.  3   8  0.43   23 20.1   1.604   2.566   164   17.1   1:12 (  0, 78)

* 123P/West-Hartley

It will brighten up to 15 mag from autumn to winter in 2026. Now it is 17.4 mag (Dec. 20, K. Hills). It stays 17 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)  
Dec. 27   3 25.10   27 15.3   2.088   2.911   139   17.2  21:01 (  0, 82)  
Jan.  3   3 21.62   27 18.3   2.127   2.881   132   17.2  20:30 (  0, 82)

* C/2019 E3 ( ATLAS )

Very far object. Now it is 16.6 mag (Oct. 19, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in January. 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)  
Dec. 27   0  4.87  -51 32.0  11.410  11.101    69   17.2  18:26 (  7,  3)  
Jan.  3   0  4.79  -50 48.5  11.495  11.114    64   17.3  18:30 ( 12,  3)

* C/2024 X2 ( ATLAS )

Now it is 17.9 mag (Dec. 15, ATLAS South Africa). Fading slowly. It will be fainter than 18 mag in March. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   8 57.61    1 55.8   3.188   3.962   136   17.3   2:37 (  0, 57)  
Jan.  3   8 49.69    3 36.8   3.132   3.984   145   17.3   2:02 (  0, 58)

* 302P/Lemmon-PanSTARRS

It brightened very rapidly, and it became brighter than expected. Now it is 16.5 mag (Dec. 18, A. Sankovich). Fading slowly. It will be fainter than 18 mag in February. It will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   0 28.40   -3 39.7   3.395   3.533    89   17.3  18:26 (  8, 51)  
Jan.  3   0 32.73   -3  1.1   3.507   3.544    84   17.4  18:30 ( 19, 50)

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 16.9 mag (Dec. 22, ATLAS-HKO, Haleakala). 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)  
Dec. 27   5 49.92   30 46.2   9.290  10.259   169   17.5  23:25 (  0, 86)  
Jan.  3   5 46.53   30 52.1   9.362  10.307   163   17.5  22:55 (  0, 86)

* C/2024 G2 ( ATLAS )

Now it is 17.8 mag (Nov. 14, W. Hasubick). 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)  
Dec. 27  12 12.10  -10 20.3   5.484   5.542    88   17.6   5:36 (355, 44)  
Jan.  3  12 11.02   -9 44.4   5.370   5.555    95   17.6   5:22 (  0, 45)

* C/2019 U5 ( PanSTARRS )

Now it is 17.2 mag (Nov. 26, Andrew Pearce). It stays 18 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)  
Dec. 27   4 50.43  -47 25.1   8.493   8.820   106   17.7  22:25 (  0,  8)  
Jan.  3   4 44.77  -47  1.7   8.569   8.864   104   17.7  21:52 (  0,  8)

* 218P/LINEAR

It will brighten up to 16 mag in spring. Now it is 18.8 mag (Dec. 21, Catalina Sky Survey). Brightening gradually. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  14  5.38  -12 40.0   1.577   1.406    61   18.0   5:36 (322, 33)  
Jan.  3  14 31.63  -14 39.1   1.506   1.358    62   17.7   5:38 (324, 32)

* 276P/Vorobjov

Now it is 17.7 mag (Nov. 25, ATLAS-MLO, Mauna Loa). Fading slowly. 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)  
Dec. 27   6 53.40    4 43.1   3.308   4.246   159   17.7   0:33 (  0, 60)  
Jan.  3   6 49.26    4 41.5   3.312   4.257   161   17.8   0:01 (  0, 60)

* 48P/Johnson

Now it is 16.5 mag (Dec. 14, ATLAS Chile). Fading gradually. It will be fainter than 18 mag in January. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   3  7.42    4 38.1   2.207   2.932   129   17.7  20:43 (  0, 60)  
Jan.  3   3  6.72    5 18.5   2.313   2.963   122   18.0  20:15 (  0, 60)

* P/2023 S1 ( PanSTARRS )

It brightened up to 13.7 mag in last winter (Jan. 4, 2025, W. Pei). It stays 18 mag for a while. 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)  
Dec. 27  14 34.40  -23  0.9   3.649   3.141    52   17.8   5:36 (321, 21)  
Jan.  3  14 42.98  -23 53.8   3.587   3.160    56   17.8   5:38 (326, 23)

* (468861) 2013 LU28

Peculiar asteroid moving along a cometary orbit. It brightened up to 17 mag from 2024 to 2025. Now it is 17.8 mag (Oct. 5, 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)  
Dec. 27   6 22.81   22  5.9   8.305   9.288   178   17.8   0:03 (  0, 77)  
Jan.  3   6 18.22   21 50.3   8.327   9.302   171   17.9  23:26 (  0, 77)

* 217P/LINEAR

It brightened up to 12.1 mag in early summer (June 10, Taras Prystavski). Now it is 16.4 mag (Dec. 11, Hidenori Nohara). Fading gradually. It will be fainter than 18 mag in January. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27   9  9.28   15  2.8   1.843   2.671   139   17.8   2:48 (  0, 70)  
Jan.  3   9  3.64   15 53.8   1.838   2.725   148   18.0   2:15 (  0, 71)

* C/2020 K1 ( PanSTARRS )

It brightened up to 12.1 mag in 2023 spring (May 20, 2023, Jose Guilherme de S. Aguiar). 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)  
Dec. 27   6 12.09  -20  5.4   7.945   8.685   136   17.8  23:47 (  0, 35)  
Jan.  3   6  8.43  -19 44.4   7.997   8.732   136   17.9  23:16 (  0, 35)

* 489P/Denning

It had been lost for 113 years. It passed the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. Brightening slowly. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 27  12 19.25    2 40.0   1.209   1.582    91   21.9   5:36 (350, 57)  
Jan.  3  12 33.10    1  5.5   1.173   1.596    95   21.9   5:38 (357, 56)

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