Weekly Information about Bright Comets (2025 Dec. 6: North)

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 Updated on December 5, 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/2025 A6 ( Lemmon )

It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Fading rapidly. Now it is not observable. It will appear soon in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  17 12.63  -29 44.6   1.773   0.814     8    8.4  18:18 ( 65,-18)  
Dec. 13  17 12.48  -32 38.2   1.884   0.928     9    9.4   5:28 (296,-21)

* 24P/Schaumasse

It will brighten up to 8 mag in winter, and will be observable in good condition. Now it is 11.5 mag (Nov. 29, Marco Goiato). It brightens up to 8 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  10 42.99   18 47.2   0.658   1.263    98    9.7   5:23 (343, 73)  
Dec. 13  11 18.10   17 51.8   0.628   1.234    97    9.1   5:28 (342, 72)

* 210P/Christensen

Now it is 9.5 mag (Nov. 28, Michael Jager, Gerald Rhemann, E. Prosperi). 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.  6  14 23.20  -10  2.7   0.740   0.596    37    9.9   5:23 (296, 17)  
Dec. 13  14 32.95   -8 54.5   0.852   0.676    42   10.9   5:28 (300, 22)

* C/2025 T1 ( ATLAS )

Now it is 9.4 mag (Nov. 26, Osamu Miyazaki). It will fade out rapidly after this. In the Northern Hemisphere, it will be getting lower gradually after this, and 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.  6  19 31.93   18 16.8   1.281   1.110    56    9.9  18:18 ( 86, 37)  
Dec. 13  19 55.22   11 25.6   1.433   1.122    51   10.3  18:19 ( 80, 33)

* 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 10.7 mag (Dec. 3, Mike Olason). Brightening gradually. Now it is not observable. It will appear 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.  6  17 50.69   -9 54.1   1.999   1.118    19   10.9  18:18 ( 77,  1)  
Dec. 13  18  7.20  -13 56.7   1.928   1.005    14   10.4  18:19 ( 75, -4)

* 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. Now it is 10.0 mag (Dec. 3, Virgilio Gonano). 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 getting higher gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  11 43.17    2  6.9   1.862   1.924    78   11.3   5:23 (326, 52)  
Dec. 13  11 14.31    4 40.1   1.813   2.111    93   11.9   5:28 (350, 59)

* C/2025 K1 ( ATLAS )

Now it is 10.6 mag (Nov. 28, Osamu Miyazaki). 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 is not observable now, but it will be observable soon. The nucleus is split into three components. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   2  6.21   64 15.6   0.545   1.401   130   11.8  20:59 (180, 62)  
Dec. 13   1 16.92   52 20.3   0.723   1.525   125   12.8  19:47 (180, 73)

* C/2025 R2 ( SWAN )

It brightened up to 5.2 mag in October (Oct. 11, Virgilio Gonano). Now it is 11.3 mag (Nov. 28, Osamu Miyazaki). Fading rapidly. 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 getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   0 17.20    8 48.8   1.094   1.740   113   12.1  19:17 (  0, 64)  
Dec. 13   0 30.11    9 44.3   1.265   1.847   109   12.7  19:02 (  0, 65)

* 240P/NEAT

Now it is 11.9 mag (Nov. 29, Marco Goiato). 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 14.8 mag (Nov. 15, Andrew Pearce). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   3 33.51    9 24.2   1.180   2.125   157   12.1  22:32 (  0, 65)  
Dec. 13   3 27.49   11 11.6   1.209   2.122   150   12.2  21:58 (  0, 66)

* 88P/Howell

It will brighten rapidly after this. In the Northern Hemisphere, it will be unobservable soon. 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.  6  15 33.71  -18 37.2   2.650   1.741    18   13.1   5:23 (292, -1)  
Dec. 13  15 53.71  -19 52.3   2.587   1.699    20   12.8   5:28 (295,  0)

* 235P/LINEAR

It became brighter than expected. Now it is 13.5 mag (Nov. 29, Ken-ichi Kadota). It stays 13 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)  
Dec.  6  13 36.70  -12 10.9   2.520   1.983    46   13.4   5:23 (307, 24)  
Dec. 13  13 52.60  -13 17.3   2.463   1.980    50   13.3   5:28 (311, 26)

* C/2022 N2 ( PanSTARRS )

Now it is 12.8 mag (Nov. 28, 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.  6   3 15.56   25 27.7   3.053   3.985   158   13.4  22:14 (  0, 81)  
Dec. 13   3 13.64   25 12.5   3.112   4.003   151   13.5  21:45 (  0, 80)

* 29P/Schwassmann-Wachmann 1

It brightened in outburst up to 13.9 mag on Dec. 5 (Jean-Francois Soulier). It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  11 30.19   -2 14.3   6.404   6.304    79   14.0   5:23 (333, 49)  
Dec. 13  11 31.94   -2 35.4   6.291   6.304    86   14.0   5:28 (345, 51)

* C/2022 QE78 ( ATLAS )

Now it is 14.4 mag (Nov. 29, Purple Mountain Observatory, XuYi Station). It stays 14 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.  6   9 26.40   21 51.5   5.001   5.512   116   14.4   4:28 (  0, 77)  
Dec. 13   9 27.01   22 28.0   4.913   5.518   123   14.4   4:01 (  0, 77)

* 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 unobservable soon. But it will be observable again in December. 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.  6  16 29.57   -0 49.9   6.949   6.048    22   14.7   5:23 (270, -2)  
Dec. 13  16 35.22   -0 37.1   6.955   6.077    25   14.8   5:28 (273,  4)

* C/2024 J3 ( ATLAS )

It will brighten up to 13 mag in 2026. Now it is 14.9 mag (Nov. 17, Alfons Diepvens). It stays 14 mag for a while. 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 February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  18 56.69   -6 50.5   5.694   4.912    34   14.9  18:18 ( 70, 16)  
Dec. 13  19  1.34   -6 13.5   5.708   4.877    29   14.9  18:19 ( 74, 11)

* 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 is not observable now, but it will be observable soon. 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.  6  15 17.53  -44  5.4   2.551   1.752    28   15.0   5:23 (315,-14)  
Dec. 13  15 25.89  -42 23.4   2.502   1.728    30   14.9   5:28 (316, -9)

* C/2024 T5 ( ATLAS )

Now it is 14.8 mag (Dec. 1, ATLAS Chile). It stays 15 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.  6   2 44.54  -44 26.3   5.429   5.798   107   14.9  21:43 (  0, 11)  
Dec. 13   2 41.41  -43 40.5   5.441   5.757   103   14.9  21:12 (  0, 11)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.3 mag (Nov. 22, 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)  
Dec.  6   5 18.01  -74 53.2  14.575  14.481    82   14.9   0:18 (  0,-20)  
Dec. 13   5 12.87  -74 57.5  14.564  14.458    81   14.9  23:41 (  0,-20)

* 78P/Gehrels 2

It will brighten up to 12 mag in 2026 summer. Now it is 16.3 mag (Dec. 2, ATLAS-HKO, Haleakala). 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.  6  20 55.95  -12 28.2   2.910   2.550    59   15.3  18:18 ( 42, 32)  
Dec. 13  21  6.51  -11 56.2   2.956   2.520    54   15.2  18:19 ( 47, 30)

* C/2023 R1 ( PanSTARRS )

Now it is 15.3 mag (Nov. 17, Alfons Diepvens). 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.  6  19 14.38    0 10.3   4.431   3.755    41   15.3  18:18 ( 73, 23)  
Dec. 13  19 15.81   -0 29.5   4.487   3.736    36   15.3  18:19 ( 77, 18)

* C/2022 E2 ( ATLAS )

It was observed at 12-13 mag for a long time in 2024. Now it is 15.2 mag (Nov. 22, Hiroshi Abe). 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 will be unobservable soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  22 27.14   36 24.6   5.091   5.332    98   15.8  18:18 (102, 79)  
Dec. 13  22 27.06   35  1.4   5.231   5.373    92   15.9  18:19 ( 96, 73)

* C/2024 R4 ( PanSTARRS )

Brightening rapidly. It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 16.0 mag (Nov. 17, Alfons Diepvens). It stays 16 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 will be unobservable soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  21 28.64   21  2.3   7.051   6.961    80   16.0  18:18 ( 67, 62)  
Dec. 13  21 29.36   20 58.0   7.111   6.921    74   16.0  18:19 ( 75, 57)

* C/2025 Q3 ( ATLAS )

Now it is 15.7 mag (Nov. 30, Ken-ichi Kadota). It stays 17 mag for a while. 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.  6   2 34.63    8 54.3   1.443   2.319   144   16.0  21:32 (  0, 64)  
Dec. 13   2 23.97    3 59.4   1.496   2.287   133   16.0  20:54 (  0, 59)

* C/2022 R6 ( PanSTARRS )

Now it is 16.2 mag (Nov. 30, ATLAS-MLO, Mauna Loa). 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.  6   8 58.47  -12  5.1   6.200   6.601   109   16.2   4:00 (  0, 43)  
Dec. 13   8 57.82  -11 59.4   6.112   6.606   116   16.1   3:32 (  0, 43)

* C/2023 C2 ( ATLAS )

It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 15.8 mag (Nov. 22, Alfons Diepvens). Fading slowly. 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.  6  22 29.71   50 24.1   4.274   4.614   104   16.3  18:18 (154, 72)  
Dec. 13  22 35.00   49 45.8   4.387   4.669   100   16.4  18:19 (144, 70)

* 261P/Larson

Now it is 16.1 mag (Dec. 1, ATLAS-MLO, Mauna Loa). Fading slowly. 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.  6  21 32.52   -9 27.8   2.159   2.021    68   16.4  18:18 ( 34, 39)  
Dec. 13  21 46.24   -8 18.2   2.222   2.017    65   16.4  18:19 ( 39, 38)

* 40P/Vaisala 1

Now it is 15.8 mag (Nov. 28, Francois Kugel). It stays 17 mag for a while. In the Southern Hemisphere, it is not observable now, but it will be observable soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  14 15.20   -5 17.9   2.466   1.840    41   16.4   5:23 (294, 22)  
Dec. 13  14 32.77   -6 24.7   2.435   1.851    43   16.4   5:28 (298, 24)

* 493P/2024 Q2 ( LONEOS )

Now it is 16.5 mag (Nov. 26, Alfons Diepvens). It stays 17 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)  
Dec.  6   4 50.22   53 47.2   2.955   3.831   148   16.5  23:49 (180, 71)  
Dec. 13   4 43.84   53 47.4   2.954   3.828   148   16.5  23:15 (180, 71)

* C/2024 A1 ( ATLAS )

Now it is 16.4 mag (Dec. 2, ATLAS-MLO, Mauna Loa). Fading slowly. 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)  
Dec.  6   8 49.21   47 35.3   3.502   4.164   126   16.5   3:51 (180, 78)  
Dec. 13   8 43.82   49 55.6   3.459   4.186   132   16.5   3:19 (180, 75)

* 145P/Shoemaker-Levy 5

Now it is 16.5 mag (Dec. 2, ATLAS Chile). It stays 17 mag for a while. 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)  
Dec.  6  22 55.60  -10 33.9   1.741   1.960    87   16.6  18:18 (  8, 44)  
Dec. 13  23  5.64   -8 42.0   1.796   1.945    83   16.5  18:19 ( 15, 45)

* C/2025 J1 ( Borisov )

Now it is 16.3 mag (Nov. 28, ATLAS-MLO, Mauna Loa). It stays 16 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.  6  10 37.23   76 51.8   3.476   3.959   112   16.7   5:23 (181, 48)  
Dec. 13  10  8.62   78 10.3   3.397   3.933   116   16.6   4:45 (180, 47)

* 164P/Christensen

Now it is 17.0 mag (Dec. 1, Alfons Diepvens). 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.  6  11 10.05   20 14.7   2.158   2.420    93   16.7   5:23 (322, 72)  
Dec. 13  11 16.15   20 40.7   2.109   2.461    98   16.6   5:28 (340, 75)

* C/2023 H5 ( Lemmon )

Now it is 16.8 mag (Nov. 22, Thomas Lehmann). It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. 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.  6  17  3.12   63  9.2   4.474   4.507    85   16.6  18:18 (149, 29)  
Dec. 13  17 25.63   62 59.0   4.483   4.524    86   16.7  18:19 (149, 28)

* 47P/Ashbrook-Jackson

Now it is 16.2 mag (Nov. 20, Thomas Lehmann). Fading slowly. It will be getting lower gradually after this, and 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.  6  22 56.43   -4 52.8   2.643   2.817    89   16.6  18:18 (  8, 50)  
Dec. 13  23  2.49   -3 54.1   2.740   2.820    84   16.7  18:19 ( 18, 50)

* 65P/Gunn

Now it is 16.9 mag (Nov. 20, Thomas Lehmann). It stays 17 mag for a while. It will be unobservable in January. But it will be observable again in March in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  20 10.88  -27 25.1   3.654   3.048    45   16.7  18:18 ( 42, 14)  
Dec. 13  20 22.05  -26 46.8   3.729   3.057    41   16.7  18:19 ( 45, 12)

* 43P/Wolf-Harrington

Now it is 16.7 mag (Nov. 22, Thomas Lehmann). 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.  6  10 56.33   -3 45.7   2.457   2.598    86   16.7   5:23 (347, 50)  
Dec. 13  11  2.12   -4 49.4   2.385   2.616    92   16.7   5:28 (357, 50)

* C/2023 F3 ( ATLAS )

Now it is 16.8 mag (Nov. 23, W. Hasubick). 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.  6  10 58.16  -24 35.1   5.782   5.677    79   16.9   5:23 (351, 30)  
Dec. 13  10 55.30  -24 44.8   5.686   5.698    85   16.8   5:28 (  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.  6  14 54.84   85 51.2   4.688   5.092   108   16.8   5:23 (185, 37)  
Dec. 13  16 15.33   85 34.0   4.686   5.090   108   16.8   5:28 (185, 36)

* 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.  6   9 56.62  -27 45.5   4.356   4.475    90   16.9   4:58 (  0, 27)  
Dec. 13   9 57.75  -28 52.3   4.278   4.479    95   16.9   4:31 (  0, 26)

* C/2023 RS61 ( PanSTARRS )

Although it is around 20 mag usually, now it is bright in outburst. Now it is 17.2 mag (Nov. 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.  6   2 49.02   37 48.8   7.945   8.812   149   17.0  21:48 (180, 87)  
Dec. 13   2 46.90   37 34.9   7.985   8.803   144   17.0  21:18 (180, 87)

* 302P/Lemmon-PanSTARRS

It brightened very rapidly, and it became brighter than expected. Now it is 16.8 mag (Nov. 23, Thomas Lehmann). Fading slowly. 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 getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   0 19.45   -5 12.2   3.062   3.502   108   17.0  19:19 (  0, 50)  
Dec. 13   0 21.70   -4 45.8   3.171   3.512   102   17.1  18:53 (  0, 50)

* C/2025 R3 ( PanSTARRS )

It is expected to brighten up to 7 mag in 2026 April. Now it is 17.2 mag (Nov. 1, Ken-ichi Kadota). It will brighten rapidly after this. It will be unobservable soon in the Southern Hemisphere, or in February in the Northern Hemisphere. But it will be observable again in March in the Northern Hemisphere. 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.  6  22 29.14   25 56.5   2.198   2.491    95   17.2  18:18 ( 53, 76)  
Dec. 13  22 22.83   24 13.6   2.229   2.394    87   17.0  18:19 ( 66, 69)

* 48P/Johnson

Now it is 16.2 mag (Nov. 19, Andrew Pearce). 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.  6   3 16.35    3  5.6   1.943   2.841   150   17.1  22:15 (  0, 58)  
Dec. 13   3 12.28    3 30.7   2.021   2.872   143   17.3  21:43 (  0, 59)

* 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 stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   0  8.00  -53 39.5  11.139  11.060    82   17.2  19:07 (  0,  2)  
Dec. 13   0  6.45  -52 57.9  11.231  11.074    78   17.2  18:38 (  0,  2)

* C/2024 X2 ( ATLAS )

Now it is 17.8 mag (Nov. 28, 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.  6   9 15.51   -2  7.8   3.439   3.899   110   17.4   4:17 (  0, 53)  
Dec. 13   9 10.60   -0 56.9   3.345   3.919   119   17.4   3:45 (  0, 54)

* 93P/Lovas 1

Now it is 18.2 mag (Nov. 21, Ken-ichi Kadota). 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.  6  21 33.25  -13 17.8   2.417   2.235    67   17.5  18:18 ( 32, 36)  
Dec. 13  21 43.21  -12  2.7   2.455   2.194    63   17.4  18:19 ( 38, 35)

* 123P/West-Hartley

It will brighten up to 15 mag from autumn to winter in 2026. Now it is 17.8 mag (Nov. 28, ATLAS-HKO, Haleakala). 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.  6   3 42.28   27  5.6   2.041   3.001   164   17.5  22:40 (  0, 82)  
Dec. 13   3 35.68   27 10.2   2.044   2.971   156   17.4  22:06 (  0, 82)

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 17.0 mag (Dec. 1, Alfons Diepvens). 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.  6   6  0.38   30 21.7   9.170  10.113   162   17.4   1:03 (  0, 85)  
Dec. 13   5 56.92   30 31.0   9.194  10.162   168   17.5   0:32 (  0, 86)

* 217P/LINEAR

It brightened up to 12.1 mag in early summer (June 10, Taras Prystavski). Now it is 17.1 mag (Nov. 25, ATLAS-MLO, Mauna Loa). 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.  6   9 18.36   13  8.3   1.914   2.505   115   17.5   4:20 (  0, 68)  
Dec. 13   9 16.78   13 38.9   1.883   2.561   123   17.6   3:51 (  0, 69)

* 60P/Tsuchinshan 2

The condition of this apparition is bad. It must have brightened up to 16 mag in summer, but it was not observable. Fading gradually. It will be fainter than 18 mag soon. 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.  6  13 49.91  -14 11.2   2.700   2.095    43   17.5   5:23 (306, 20)  
Dec. 13  14  2.97  -15 23.8   2.679   2.132    46   17.7   5:28 (310, 23)

* (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 February. In the Northern Hemisphere, it stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6   8  7.86   20 15.6   1.724   2.511   133   17.7   3:10 (  0, 75)  
Dec. 13   8  7.80   20 54.8   1.679   2.523   141   17.5   2:42 (  0, 76)

* C/2019 U5 ( PanSTARRS )

Now it is 17.2 mag (Nov. 15, 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.  6   5  9.29  -47 56.5   8.309   8.687   109   17.6   0:11 (  0,  7)  
Dec. 13   5  2.80  -47 53.0   8.363   8.731   108   17.6  23:32 (  0,  7)

* C/2025 R1 ( ATLAS )

Now it is 17.3 mag (Nov. 22, Francois Kugel). Fading slowly. It will be fainter than 18 mag soon. It locates somewhat low 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)  
Dec.  6  18 53.67   35 11.5   2.190   1.981    64   17.7  18:18 (111, 37)  
Dec. 13  18 57.72   32 23.6   2.286   1.990    60   17.8  18:19 (110, 31)

* 276P/Vorobjov

Now it is 17.7 mag (Nov. 25, ATLAS-MLO, Mauna Loa). 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.  6   7  4.37    5 16.5   3.381   4.212   143   17.7   2:06 (  0, 60)  
Dec. 13   7  1.13    5  0.8   3.344   4.223   149   17.7   1:36 (  0, 60)

* C/2024 G2 ( ATLAS )

Now it is 17.8 mag (Nov. 14, W. Hasubick). It stays 18 mag for a while. 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.  6  12 11.83  -11 39.2   5.818   5.503    66   17.7   5:23 (326, 36)  
Dec. 13  12 12.47  -11 17.1   5.710   5.516    73   17.7   5:28 (335, 40)

* 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.  6   6 23.20  -20 40.8   7.864   8.546   131   17.8   1:25 (  0, 34)  
Dec. 13   6 19.55  -20 33.6   7.879   8.592   133   17.8   0:54 (  0, 34)

* C/2023 U1 ( Fuls )

It continues brightening even after the perihelion passage. Now it is 17.5 mag (Nov. 19, ATLAS South Africa). It stays 18 mag for a while. In the Northern Hemisphere, it will never be observable after this. 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.  6  23 19.48  -61 50.9   6.102   5.902    73   17.8  18:19 (  0, -7)  
Dec. 13  23 15.54  -60 34.4   6.204   5.930    69   17.9  18:19 (  4, -6)

* (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.  6   6 36.43   22 51.0   8.345   9.249   155   18.0   1:39 (  0, 78)  
Dec. 13   6 31.99   22 36.4   8.314   9.262   163   17.9   1:07 (  0, 78)

* C/2025 V1 ( Borisov )

It brightened up to 10.4 mag in early November (Nov. 4, Michael Jager and Gerald Rhemann). However, it faded out very rapidly afer that. Fading rapidly. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  17 54.37    1 20.2   1.334   0.664    28   18.1  18:18 ( 86,  8)  
Dec. 13  18 14.98   -1 30.5   1.552   0.785    25   19.6  18:19 ( 85,  5)

* C/2013 C2 ( Tenagra )

It brightened in major outburst of 5 mag. Now it is 17.8 mag (Oct. 14, E. Cortes, B. Lutkenhoner). It stays 19 mag for a while. It locates somewhat low in the Northern Hemisphere. It stays extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  6  19 53.13   -3 35.2  15.723  15.085    48   18.3  18:18 ( 62, 28)  
Dec. 13  19 54.88   -3 33.7  15.814  15.099    42   18.4  18:19 ( 67, 23)

* 489P/Denning

It had been lost for 113 years. It will pass the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. Brightening slowly. 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.  6  11 31.29    7 55.5   1.328   1.561    83   22.1   5:23 (326, 59)  
Dec. 13  11 48.22    6  6.4   1.286   1.564    86   22.1   5:28 (334, 59)

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