Weekly Information about Bright Comets (2023 Dec. 2: North)

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 Updated on December 8, 2023
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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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* 62P/Tsuchinshan 1

It is expected to brighten up to 7 mag, and it will be observable in good condition in winter. Now it is 9.6 mag (Nov. 20, Osamu Miyazaki). It will fade out rapidly after this. 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.  2   9 47.33   18 15.4   0.606   1.294   106    8.2   5:06 (  0, 73)  
Dec.  9  10 14.31   17  4.3   0.578   1.279   106    7.7   5:05 (  0, 72)

* 12P/Pons-Brooks

It returns for the first time in 70 years. It will brighten up to 4.5 mag in 2024 spring. It suddenly brightened in major outburst by 5 mag up to 11.5 mag on July 20 (E. Tamas, Francois Kugel). It brightened again in another major outburst up to 9.4 mag on Nov. 15 (Nick James). Now it is 8.9 mag (Dec. 3, Osamu Miyazaki). Brightening rapidly. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  18 27.92   38 35.9   2.593   2.378    66    8.6  18:18 (115, 37)  
Dec.  9  18 41.60   38 11.9   2.519   2.291    65    8.5  18:18 (116, 34)

* C/2023 H2 ( Lemmon )

It approached to Earth down to 0.2 a.u. in early November, and brightened up to 6.2 mag (Nov. 11, Marco Goiato). Now it is 8.6 mag (Nov. 27, Osamu Miyazaki). Fading rapidly. In the Northern Hemisphere, it will be unobservable in January. 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.  2  22 19.01  -37 52.5   0.769   1.079    74   10.0  18:18 (  8, 16)  
Dec.  9  22 35.34  -39 58.9   0.996   1.150    70   10.8  18:18 ( 10, 14)

* C/2021 S3 ( PanSTARRS )

It is expected to brighten up to 8.5 mag in early 2024. Now it is 11.2 mag (Nov. 25, Marco Goiato). Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in winter. The brightness evolution slowed down since May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  13  3.84  -39 58.2   2.225   1.713    47   10.4   5:20 (327,  4)  
Dec.  9  13 28.03  -40  0.4   2.145   1.652    47   10.2   5:25 (328,  5)

* 103P/Hartley 2

It approached to Earth down to 0.38 a.u., and brightened up to 8.0 mag in autumn (Sept. 29, Virgilio Gonano). Now it is 10.2 mag (Nov. 24, Carlos Labordena). It will fade out rapidly after this. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   9  4.95   -9 22.4   0.569   1.265   105   10.8   4:24 (  0, 46)  
Dec.  9   9  5.11  -11 28.2   0.588   1.316   111   11.2   3:57 (  0, 43)

* C/2020 V2 ( ZTF )

Now it is 11.1 mag (Nov. 18, Thomas Lehmann). Fading slowly. 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 March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  23 24.94  -42 51.4   3.141   3.205    84   11.5  18:42 (  0, 12)  
Dec.  9  23 20.70  -42 33.5   3.310   3.258    78   11.7  18:18 (  2, 13)

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 11.8 mag (Dec. 4, Osamu Miyazaki). Fading slowly. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   6 10.02   -6 29.6   3.522   4.347   142   12.4   1:30 (  0, 48)  
Dec.  9   6  2.25   -5 50.0   3.545   4.409   147   12.4   0:55 (  0, 49)

* 144P/Kushida

It is expected to brighten up to 8.5 mag from January to February. Now it is 13.2 mag (Nov. 22, Thomas Lehmann). Brightening rapidly. It stays observable in good condition. It is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   2 48.09   16 42.9   0.580   1.532   155   13.2  22:04 (  0, 72)  
Dec.  9   2 48.14   15 51.7   0.572   1.502   148   12.8  21:37 (  0, 71)

* C/2019 U5 ( PanSTARRS )

Now it is 13.7 mag (Nov. 15, Hiroshi Abe). It stays 14 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.  2  10 36.47  -35 10.9   4.364   4.241    76   13.2   5:20 (352, 19)  
Dec.  9  10 31.42  -36 53.2   4.297   4.273    82   13.2   5:23 (  0, 18)

* C/2022 E2 ( ATLAS )

Now it is 13.9 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). It stays 13 mag for a while. It stays observable in good condition. It is expected to brighten up to 12 mag from 2024 to 2025. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   9 36.05    7 58.2   4.092   4.457   105   13.4   4:55 (  0, 63)  
Dec.  9   9 31.87    8 52.6   3.933   4.423   113   13.2   4:24 (  0, 64)

* C/2021 T4 ( Lemmon )

It brightened up to 7.8 mag in late July (July 20, Thomas Lehmann). Now it is 12.9 mag (Oct. 3, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it will be getting higher gradually. 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.  2  15 12.77   -8 42.9   3.110   2.234    22   13.5   5:20 (284,  5)  
Dec.  9  15 14.44   -8  6.1   3.108   2.300    29   13.6   5:25 (288, 11)

* 2P/Encke

It brightened up to 8.1 mag in autumn (Oct. 10, Juan Jose Gonzalez). Fading rapidly. It will be fainter than 18 mag in January. It will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  17 26.69  -28  7.9   1.894   0.970    14   13.5  18:18 ( 63,-11)  
Dec.  9  17 57.97  -28 17.2   2.013   1.084    14   14.4  18:18 ( 62,-10)

* 29P/Schwassmann-Wachmann 1

Now it is 13 mag (Nov. 22, Giuseppe Pappa). It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   8 43.38   20 28.9   5.587   6.158   121   13.7   4:03 (  0, 75)  
Dec.  9   8 42.31   20 30.4   5.496   6.160   128   13.6   3:34 (  0, 75)

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 13.2 mag (July 14, Chris Wyatt). It stays 14 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.  2  11 23.92  -45 30.6   7.187   6.835    65   14.1   5:20 (346,  7)  
Dec.  9  11 25.99  -46 30.0   7.164   6.880    69   14.1   5:25 (351,  8)

* C/2022 L2 ( ATLAS )

Now it is 14.9 mag (Sept. 18, Ken-ichi Kadota). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it is not observable now, but it will be observable soon. It is expected to brighten up to 12.5 mag in 2024 spring. At the high light, it will be observable in excellent condition in the Southern Hemisphere, but it will be low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  15 24.25  -12 16.2   3.811   2.892    18   14.4   5:20 (285,  0)  
Dec.  9  15 26.44  -13 30.7   3.737   2.867    24   14.3   5:25 (291,  6)

* C/2020 K1 ( PanSTARRS )

Now it is 15.0 mag (Nov. 15, ATLAS Chile). Fading slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. It was expected to brighten up to 10 mag from spring to summer. However, it was fainter than originally expected. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  10 47.26  -85 34.2   3.920   3.665    67   14.5   5:20 (359,-31)  
Dec.  9   9 18.63  -86 38.2   3.943   3.701    68   14.6   4:08 (  0,-32)

* C/2021 G2 ( ATLAS )

Now it is 15.1 mag (Nov. 17, ATLAS Chile). It stays 14 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.  2  11 50.29  -34 37.5   5.827   5.430    61   14.7   5:20 (337, 16)  
Dec.  9  11 55.09  -35 14.6   5.728   5.409    66   14.6   5:25 (343, 17)

* C/2023 A3 ( Tsuchinshan-ATLAS )

It will approach to Sun down to 0.4 a.u. in late September in 2024, and it is expected to brighten up to 0 mag. Now it is 14.7 mag (Dec. 1, Ken-ichi Kadota). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will be observable soon. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  14 46.02   -5 58.4   5.411   4.580    29   14.8   5:20 (286, 12)  
Dec.  9  14 49.81   -6 20.4   5.270   4.504    35   14.6   5:25 (291, 17)

* 32P/Comas Sola

Now it is 14.2 mag (Nov. 15, Ken-ichi Kadota). It stays 15 mag for a while. 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.  2   2 53.73   16 51.1   1.430   2.368   156   14.8  22:10 (  0, 72)  
Dec.  9   2 48.81   17  7.9   1.440   2.338   148   14.7  21:37 (  0, 72)

* C/2023 S2 ( ATLAS )

It brightened up to 12.6 mag in autumn (Oct. 3, Chris Wyatt). Now it is 15.2 mag (Nov. 21, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in January. 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.  2  20 57.82   -0 55.1   1.312   1.318    68   14.8  18:18 ( 45, 44)  
Dec.  9  21 29.92    0 12.1   1.382   1.385    69   15.3  18:18 ( 45, 46)

* C/2023 P1 ( Nishimura )

It approached to Sun down to 0.23 a.u. and brightened up to 2.5 mag in mid September (Sept. 18, Juan Jose Gonzalez). Now it is 11.5 mag (Nov. 22, Giuseppe Pappa). Fading rapidly. It will be fainter than 18 mag in January. In the Northern Hemisphere, it will be unobservable in January. In the Southern Hemisphere, it stays observable in good condition. It is brighter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  12 46.66  -42 54.2   2.211   1.758    50   14.9   5:20 (331,  3)  
Dec.  9  12 41.41  -45 20.4   2.229   1.875    56   15.4   5:25 (338,  5)

* C/2021 X1 ( Maury-Attard )

Now it is 14.7 mag (Nov. 1, Ken-ichi Kadota). Fading slowly. It will be getting lower gradually after this, and it will be unobservable in January in the Southern Hemisphere, or in February in the Northern Hemisphere. But it will be observable again in March in the Northern Hemisphere, or in April in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  22 39.38    3  1.0   3.502   3.692    93   14.9  18:18 ( 10, 58)  
Dec.  9  22 35.57    3  3.8   3.670   3.724    85   15.0  18:18 ( 24, 56)

* C/2019 T4 ( ATLAS )

It brightened up to 11.1 mag in early 2022 (Mar. 31, 2022, F. Kugel, J.-G. Bosch, J. Nicolas). Now it is 14.3 mag (Nov. 3, 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 February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  16 36.26   15 45.9   6.823   6.072    37   15.1  18:18 (106,  4)  
Dec.  9  16 42.29   15 54.3   6.845   6.110    38   15.1   5:25 (256,  7)

* 226P/Pigott-LINEAR-Kowalski

Now it is 15.9 mag (Nov. 17, ATLAS Chile). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. 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.  2   0 36.93  -30  0.1   1.278   1.790   103   15.3  19:53 (  0, 25)  
Dec.  9   0 37.12  -24 58.1   1.319   1.782   100   15.3  19:26 (  0, 30)

* C/2022 JK5 ( PanSTARRS )

The ATLAS search program detected its cometary activity in April. It continues to be brightening even after the perihelion passage. Now it is 14.8 mag (Nov. 18, Thomas Lehmann). 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 be getting lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  23 40.20  -18 41.8   3.157   3.442    98   15.4  18:57 (  0, 37)  
Dec.  9  23 44.20  -17 30.6   3.292   3.484    92   15.6  18:34 (  0, 38)

* C/2022 A2 ( PanSTARRS )

It brightened up to 9.5 mag from last winter to early spring (Jan. 30, Katsumi Yoshimoto). Now it is 14.9 mag (Nov. 15, Thomas Lehmann). Fading gradually. It will be fainter than 18 mag in March. It will be getting lower gradually after this, and it will be unobservable in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  22 34.20  -12 32.2   3.738   3.804    86   15.6  18:18 (  9, 42)  
Dec.  9  22 36.08  -13  7.2   3.926   3.869    79   15.8  18:18 ( 17, 40)

* 471P/2023 KF3

David Rankin detected its cometary activity in June. Now it is 15.7 mag (Nov. 13, Toshihiko Ikemura, Hirohisa Sato). 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 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.  2  22 49.73   -1 23.7   1.820   2.130    94   15.7  18:18 (  4, 54)  
Dec.  9  23  0.12   -0 32.7   1.889   2.126    89   15.7  18:18 ( 12, 54)

* 207P/NEAT

It will approach to Earth down to 0.2 a.u. from February to March, and it is expected to brighten up to 13 mag. Now it is 18.1 mag (Nov. 13, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly after this. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  23 52.89  -10  0.2   0.630   1.300   104   16.1  19:10 (  0, 45)  
Dec.  9  23 56.44  -11 16.4   0.617   1.235    98   15.9  18:46 (  0, 44)

* 213P/Van Ness

It has not been observed yet in this apparition. It was expected to brighten rapidly up to 15 mag in summer. But actually, it is not detected, fainter than 18 mag (Oct. 14, Martin Masek). Fading 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.  2  20 15.32  -17 39.0   2.419   1.987    52   15.9  18:18 ( 44, 25)  
Dec.  9  20 31.20  -16 22.2   2.480   1.992    49   16.0  18:18 ( 47, 24)

* 126P/IRAS

It brightened up to 13.6 mag in summer (July 16, Mitsunori Tsumura). Now it is 15.7 mag (Nov. 21, 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)  
Dec.  2  23 14.87   67  3.4   1.735   2.322   114   15.9  18:31 (180, 58)  
Dec.  9  23 17.42   66  8.4   1.811   2.369   112   16.1  18:18 (178, 59)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.9 mag (Nov. 22, Thomas Lehmann). It stays 16 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.  2   3  5.25  -66  2.6  16.915  16.955    90   16.0  22:20 (  0,-11)  
Dec.  9   3  2.39  -65 58.5  16.928  16.930    88   16.0  21:50 (  0,-11)

* C/2021 Y1 ( ATLAS )

Now it is 14.3 mag (July 7, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear 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.  2  15  6.37  -48 48.7   3.999   3.202    31   16.0   5:20 (318,-18)  
Dec.  9  15 18.53  -48 42.9   4.043   3.260    32   16.1   5:25 (320,-15)

* C/2022 S4 ( Lemmon )

Now it is 16.1 mag (Nov. 29, Ken-ichi Kadota). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in March. In the Southern Hemisphere, it stays observable in good condition. The brightness evolution is slower than originally expected. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   2 11.65  -26 31.8   2.993   3.603   121   16.1  21:27 (  0, 28)  
Dec.  9   2  3.95  -27 40.7   3.044   3.560   113   16.1  20:52 (  0, 27)

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 16.8 mag (Nov. 11, ATLAS South Africa). It stays 16 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)  
Dec.  2   9 31.93  -58 18.1   3.812   3.747    78   16.1   4:51 (  0, -3)  
Dec.  9   9 24.03  -61  8.2   3.783   3.757    80   16.1   4:15 (  0, -6)

* P/2007 T2 ( Kowalski )

New peridic comet which brightened up to 16 mag in 2007. It has not been recovered yet. It was missed in 2013 and 2018. It will approach to Earth down to 0.34 a.u. in winter, and it is expected to brighten up to 16 mag. It will fade out rapidly after this. It will be fainter than 18 mag in January. In the Northern Hemisphere, it will be getting higher gradually. It stays extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  19 34.57  -14 36.7   0.549   0.706    44   16.4  18:18 ( 54, 21)  
Dec.  9  20 12.59   -7 34.5   0.457   0.763    48   16.2  18:18 ( 57, 28)

* 199P/Shoemaker 4

Now it is 17.3 mag (Nov. 14, ATLAS Chile). Fading slowly. 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.  2  19 58.89  -33 51.7   3.608   3.026    47   16.3  18:18 ( 37,  9)  
Dec.  9  20 11.41  -33 31.0   3.684   3.040    43   16.4  18:18 ( 40,  8)

* C/2022 V2 ( Lemmon )

It is expected to brighten up to 16 mag in winter. Now it is 17.7 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be getting higher gradually. It is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  11 51.56   -1 53.7   2.206   2.093    70   16.4   5:20 (319, 45)  
Dec.  9  11 47.75   -5  2.8   2.095   2.108    77   16.3   5:25 (333, 46)

* (3200) Phaethon

Fading gradually. It will be fainter than 18 mag in January. 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.  2  20 35.44    5 23.5   0.957   1.057    65   16.4  18:18 ( 57, 46)  
Dec.  9  21 13.26    7 20.2   1.075   1.165    68   16.7  18:18 ( 56, 49)

* C/2022 E3 ( ZTF )

It approached to Earth down to 0.29 a.u. in early February, and it brightened up to 4.5 mag (Feb. 1, Juan Jose Gonzalez). Now it is 16.1 mag (Nov. 15, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in March. 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)  
Dec.  2   4 40.38  -62 52.7   4.138   4.341    95   16.5  23:54 (  0, -8)  
Dec.  9   4 22.09  -62 54.6   4.231   4.411    94   16.6  23:08 (  0, -8)

* C/2023 S3 ( Lemmon )

Now it is 16.2 mag (Nov. 18, Giuseppe Pappa). Fading slowly. It will be unobservable in January. But it will be observable again in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  22 48.46  -38 39.9   0.881   1.202    79   16.5  18:18 (  3, 16)  
Dec.  9  22 13.66  -39  4.8   1.039   1.119    67   16.6  18:18 ( 15, 14)

* C/2022 QE78 ( ATLAS )

Now it is 16.0 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). 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.  2   4 45.46  -12 46.2   6.355   7.186   145   16.6   0:05 (  0, 42)  
Dec.  9   4 42.76  -12 39.0   6.332   7.155   144   16.6  23:31 (  0, 42)

* 13P/Olbers

It returned for the first time in 68 years. It will brighten up to 7.5 mag in 2024 summer. Now it is 17.5 mag (Nov. 14, ATLAS Chile). It will brighten rapidly after this. It stays observable in good condition. At the high light, it locates low in the Northern Hemisphere, or it is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   3 36.40  -20 39.8   2.248   3.031   135   16.9  22:52 (  0, 34)  
Dec.  9   3 27.57  -19 52.2   2.211   2.959   131   16.6  22:15 (  0, 35)

* 26P/Grigg-Skjellerup

It will turn to fade out rapidly after brightening. It will be fainter than 18 mag in February. It stays extremely low. It will brighten up to 13 mag in January. But it locates extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  14 13.32  -19  3.0   1.833   1.127    32   18.0   5:20 (301,  9)  
Dec.  9  14 44.51  -19 45.1   1.814   1.105    31   16.6   5:25 (302,  9)

* C/2021 S4 ( Tsuchinshan )

Now it is 16.8 mag (Nov. 4, ATLAS-HKO, Haleakala). 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.  2   4 48.82   41 46.4   5.759   6.693   159   16.6   0:09 (180, 83)  
Dec.  9   4 45.73   41 46.9   5.754   6.691   160   16.6  23:34 (180, 83)

* 237P/LINEAR

It brightened up to 11.8 mag in summer (June 17, Osamu Miyazaki). Now it is 16.5 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). It will fade out rapidly after this. It will be fainter than 18 mag in January. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be unobservable in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  21 13.59   -2 13.5   2.642   2.509    71   16.7  18:18 ( 40, 45)  
Dec.  9  21 24.70   -1 46.5   2.751   2.539    67   16.9  18:18 ( 45, 43)

* C/2022 N2 ( PanSTARRS )

It is expected to brighten up to 11.5 mag in 2025 autumn, and it will be observable in good condition. Now it is 17.1 mag (Nov. 14, ATLAS Chile). It stays 16 mag for a while. It will be unobservable in January. But it will be observable again in March 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.  2  20 47.37  -18  8.9   6.779   6.346    60   16.7  18:18 ( 36, 28)  
Dec.  9  20 51.19  -17 50.9   6.832   6.303    53   16.7  18:18 ( 42, 25)

* C/2023 E1 ( ATLAS )

It brightened up to 8.4 mag in late July (July 22, Thomas Lehmann). Now it is 18.4 mag (Nov. 15, Toshihiko Ikemura, Hirohisa Sato). Fading rapidly. It will be fainter than 18 mag in January. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting lower gradually. Thomas Lehmann reported it was bright as 14.9 mag on Nov. 18. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  23 24.46  -24  4.0   2.213   2.465    92   16.7  18:42 (  0, 31)  
Dec.  9  23 32.43  -23 25.0   2.381   2.544    87   17.1  18:22 (  0, 32)

* 117P/Helin-Roman-Alu 1

Now it is 16.5 mag (Nov. 16, ATLAS Chile). Fading slowly. 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 after this, and it will be unobservable in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   0  4.30   -7 20.1   3.387   3.819   108   16.7  19:21 (  0, 48)  
Dec.  9   0  5.72   -6 50.1   3.504   3.835   102   16.8  18:55 (  0, 48)

* C/2023 C2 ( ATLAS )

It is expected to brighten up to 12.5 mag in 2024 summer. Now it is 17.3 mag (July 28, ATLAS South Africa). Brightening slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Around the high light, it is observable in good condition in the Southern Hemisphere, but it locates very low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  13 25.72  -53 46.9   4.962   4.351    47   16.9   5:20 (332, -9)  
Dec.  9  13 36.97  -54 58.5   4.871   4.296    49   16.8   5:25 (335, -8)

* C/2019 E3 ( ATLAS )

Very far object. Now it is 17.3 mag (Nov. 17, Jean-Claude Merlin). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. 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.  2   3 29.90  -77  7.0  10.428  10.313    80   16.8  22:43 (  0,-22)  
Dec.  9   3 14.47  -76 44.9  10.452  10.314    79   16.8  22:00 (  0,-22)

* C/2022 U3 ( Bok )

Now it is 17.3 mag (Nov. 15, A. 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. But it will become high in autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   4 54.44   36 44.5   4.219   5.174   164   16.8   0:15 (180, 88)  
Dec.  9   4 50.68   36  9.4   4.192   5.155   166   16.8  23:39 (180, 89)

* C/2020 Y2 ( ATLAS )

It brightened up to 14.1 mag in 2022 spring (Mar. 22, 2022, Chris Wyatt). Now it is 16.6 mag (Nov. 29, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in April. 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.  2   1 32.10   -1 14.4   5.047   5.740   130   16.8  20:48 (  0, 54)  
Dec.  9   1 27.77   -0 50.8   5.190   5.788   123   16.9  20:16 (  0, 54)

* C/2020 S4 ( PanSTARRS )

It brightened up to 13.9 mag in early 2023 (Jan. 21, Hidenori Nohara). Now it is 16.3 mag (June 17, 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 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.  2  13 53.79    7  3.3   4.920   4.323    47   16.9   5:20 (283, 30)  
Dec.  9  14  0.70    6 46.8   4.883   4.361    52   16.9   5:25 (288, 35)

* 65P/Gunn

It will be observable at 15-16 mag from 2024 to 2025. Now it is 17.9 mag (Apr. 25, A. Diepvens). 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.  2  12 42.33    3 48.7   4.206   3.831    61   17.1   5:20 (301, 41)  
Dec.  9  12 48.37    3 17.9   4.097   3.816    66   17.0   5:25 (308, 45)

* C/2022 T1 ( Lemmon )

It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. 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.  2  12 48.15  -21 47.7   4.051   3.519    51   17.2   5:20 (319, 21)  
Dec.  9  12 57.31  -22 40.8   3.966   3.506    55   17.1   5:25 (324, 23)

* C/2022 R6 ( PanSTARRS )

Now it is 16.7 mag (Nov. 13, Jean-Claude Merlin). It stays 17 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.  2   5  3.93  -41  5.5   7.301   7.792   116   17.2   0:23 (  0, 14)  
Dec.  9   5  1.13  -41  5.0   7.283   7.768   116   17.2  23:49 (  0, 14)

* 170P/Christensen

Now it is 16.1 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. 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.  2   3 28.56    4  4.3   2.241   3.171   156   17.2  22:44 (  0, 59)  
Dec.  9   3 24.61    4  6.7   2.292   3.185   150   17.3  22:13 (  0, 59)

* C/2022 U1 ( Leonard )

Now it is 16.9 mag (Nov. 12, 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)  
Dec.  2  22 50.13   47 37.1   3.884   4.311   109   17.3  18:18 (172, 77)  
Dec.  9  22 43.89   45 52.5   3.962   4.298   103   17.3  18:18 (145, 76)

* P/2001 Q6 ( NEAT )

First return of a new periodic comet which brightened up to 10 mag in 2001. It is expected to brighten up to 12-13 mag from February to March in 2024. It will brighten rapidly after this. 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 January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  23  8.21  -23 28.5   1.522   1.808    89   17.5  18:25 (  0, 32)  
Dec.  9  23  6.93  -19  5.7   1.557   1.755    84   17.4  18:18 (  6, 36)

* P/2023 M4 ( ATLAS )

Now it is 17.2 mag (Nov. 15, A. Diepvens). Fading slowly. It will be fainter than 18 mag in January. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. It was very faint as 21.5 mag in 2021. It seems to be bright temporarily in outburst. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  21 25.59  -10 41.0   4.914   4.691    71   17.5  18:18 ( 31, 39)  
Dec.  9  21 30.28  -10 19.0   5.030   4.705    65   17.6  18:18 ( 37, 37)

* 227P/Catalina-LINEAR

Now it is 19.5 mag (Nov. 12, Toshihiko Ikemura, Hirohisa Sato). Brightening 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.  2   7 38.21   32 46.3   1.024   1.871   137   17.8   2:58 (  0, 88)  
Dec.  9   7 41.93   33 43.6   0.955   1.840   143   17.5   2:34 (  0, 89)

* C/2020 F2 ( ATLAS )

Now it is 17.0 mag (Apr. 11, Michael Jager). 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.  2  12 33.46   12 59.7   9.618   9.288    67   17.6   5:20 (293, 49)  
Dec.  9  12 33.49   13 13.9   9.514   9.300    74   17.6   5:25 (302, 55)

* C/2023 V4 ( Camarasa-Duszanowicz )

It is expected to brighten up to 13 mag in early summer in 2024. Now it is 18.3 mag (Nov. 13, Jean-Claude Merlin). Brightening gradually. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. At the high light, it is not observable in the Southern Hemisphere, or it locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   2 59.45  -46 33.4   2.341   2.815   108   17.8  22:14 (  0,  9)  
Dec.  9   2 45.91  -44 50.5   2.298   2.736   105   17.7  21:33 (  0, 10)

* 150P/LONEOS

It brightens up to 16 mag from January to February. Now it is 18.0 mag (Nov. 15, Ken-ichi Kadota). Brightening slowly. It stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   9  0.79    9  5.5   1.378   1.994   114   17.9   4:20 (  0, 64)  
Dec.  9   9  6.04    6 51.6   1.288   1.965   118   17.7   3:58 (  0, 62)

* C/2021 A9 ( PanSTARRS )

Now it is 18.3 mag (Nov. 21, Ken-ichi Kadota). 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.  2   7 19.63    9 33.1   7.004   7.760   137   17.7   2:39 (  0, 65)  
Dec.  9   7 14.31    9 25.5   6.930   7.760   145   17.7   2:07 (  0, 64)

* C/2020 R7 ( ATLAS )

It brightened up to 13.4 mag in 2022 summer (July 7, 2022, Giuseppe Pappa). Now it is 18.6 mag (Oct. 2, ATLAS-HKO, Haleakala). 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)  
Dec.  2  16  0.98   30 40.0   5.632   5.099    52   17.8   5:20 (244, 17)  
Dec.  9  16  5.24   31 16.6   5.640   5.148    55   17.8   5:25 (247, 23)

* 404P/2020 M6 ( Bressi )

Now it is 18.8 mag (Nov. 14, Toshihiko Ikemura, Hirohisa Sato). 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.  2   4 50.45   24  5.0   3.151   4.133   174   17.8   0:11 (  0, 79)  
Dec.  9   4 45.80   23 45.5   3.150   4.134   176   17.8  23:34 (  0, 79)

* 30P/Reinmuth 1

Now it is 17.2 mag (Nov. 13, Toshihiko Ikemura, Hirohisa Sato). 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 lower gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2   1 23.90   -2 47.5   2.090   2.810   128   17.9  20:40 (  0, 52)  
Dec.  9   1 22.08   -2 33.2   2.133   2.773   121   17.9  20:11 (  0, 53)

* C/2023 V5 ( Leonard )

Tiny member of Comet C/1988 A1 ( Liller )'s group. Now it is 17.5 mag (Nov. 17, Giuseppe Pappa). It will fade out rapidly after this. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  2  19  6.56   24 45.4   0.679   0.875    60   19.1  18:18 ( 96, 39)  
Dec.  9  18 49.76   26 12.6   0.810   0.852    55   19.3  18:18 (103, 30)

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