Weekly Information about Bright Comets (2022 Dec. 24: North)

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 Updated on December 23, 2022
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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/2022 E3 ( ZTF )

Now it is very bright as 8.3 mag (Dec. 18, Michael Jager). It will approach to Earth down to 0.29 a.u. in February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition for a long time, although it became extremely low temporarily in November. In the Southern Hemisphere, it is not observable until early February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  15 53.76   28 20.7   1.251   1.158    61    8.1   5:34 (259, 37)  
Dec. 31  15 53.24   30 40.0   1.066   1.132    66    7.7   5:37 (259, 44)

* C/2017 K2 ( PanSTARRS )

Now it is bright as 8.7 mag (Dec. 20, Chris Wyatt). It is observable at 8 mag for a long time from 2022 to 2023. In the Southern Hemisphere, it stays observable for a long time, although it becomes low temporarily from November to December. In the Northern Hemisphere, it is not observable until 2023 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  18 13.50  -62  2.7   2.458   1.798    38    7.9  18:24 ( 33,-33)  
Dec. 31  18 43.72  -64 41.9   2.416   1.803    41    7.8  18:28 ( 30,-33)

* C/2020 V2 ( ZTF )

Now it is 10.8 mag (Dec. 20, Osamu Miyazaki). It stays bright as 10 mag for a long time until 2023 autumn. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it stays unobservable until 2023 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   5 18.96   85 44.7   2.106   2.706   117    9.9  22:50 (180, 39)  
Dec. 31   2 30.59   81 43.9   2.071   2.663   116    9.8  19:49 (180, 44)

* C/2022 A2 ( PanSTARRS )

Brightening very rapidly. Now it is very bright as 10.7 mag (Dec. 19, Osamu Miyazaki). It stays 10-11 mag until March. In the Northern Hemisphere, it will be observable in good condition after this. In the Southern Hemisphere, it is not observable until 2023 June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  14 55.90   42 60.0   1.790   1.883    79   11.4   5:34 (243, 52)  
Dec. 31  15 30.56   47 22.8   1.705   1.850    82   11.2   5:37 (236, 52)

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in last winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is fading. But it is bright as 11.6 mag still now (Dec. 20, Chris Wyatt). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9 58.26  -29 17.0   4.384   4.713   103   11.3   3:50 (  0, 26)  
Dec. 31   9 55.99  -30 30.7   4.347   4.752   108   11.3   3:20 (  0, 24)

* C/2022 P1 ( NEOWISE )

Now it is very bright as 10.4 mag (Nov. 23, Chris Wyatt). It will be fading after this. In the Southern Hemisphere, it becomes unobservable temporarily from December to January. In the Northern Hemisphere, it is not observable until spring when it fades down to 15 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  19 28.07  -38 20.5   2.492   1.629    22   11.3  18:24 ( 51,-12)  
Dec. 31  19 27.37  -38 10.6   2.555   1.650    18   11.6  18:28 ( 55,-17)

* 81P/Wild 2

Now it is 11.7 mag (Dec. 19, Osamu Miyazaki). Appearing in the morning sky also in the Southern Hemisphere. It stays 11-12 mag until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  14 10.06  -11  0.1   1.892   1.601    57   11.5   5:34 (316, 32)  
Dec. 31  14 29.28  -12 25.9   1.853   1.606    59   11.5   5:37 (320, 33)

* C/2020 K1 ( PanSTARRS )

Now it is 13.2 mag (Nov. 27, Ken-ichi Kadota). It is expected to brighten up to 11 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from November to January. In the Northern Hemisphere, it is not observable until 2024 autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  18 16.57  -23 57.9   4.330   3.347     2   12.0  18:24 ( 72,-17)  
Dec. 31  18 23.93  -25  5.7   4.301   3.321     3   11.9   5:37 (290,-16)

* C/2019 U5 ( PanSTARRS )

Now it is 13.2 mag (Nov. 16, Ken-ichi Kadota). It is expected to brighten up to 12 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. It is appearing in the morning sky also in the Southern Hemisphere. It stays observable in good condition after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  13 52.61    4 27.9   3.979   3.726    68   12.8   5:34 (308, 47)  
Dec. 31  13 51.75    3 47.7   3.844   3.712    74   12.7   5:37 (318, 51)

* C/2019 T4 ( ATLAS )

Now it is bright as 12.8 mag (Dec. 8, Hiroshi Abe). It stays 12 mag for a while. It stays observable in good condition for a while after this. It will be observable after January also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  14 59.42   -1 15.8   5.106   4.548    50   12.9   5:34 (298, 32)  
Dec. 31  15  5.80   -0 44.9   5.041   4.569    56   12.9   5:37 (302, 36)

* 118P/Shoemaker-Levy 4

Now it is 13.4 mag (Nov. 26, Toshihiko Ikemura, Hirohisa Sato). It stays bright as 13 mag and observable in excellent condition until February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   8 44.68    7 58.8   0.985   1.847   139   13.0   2:36 (  0, 63)  
Dec. 31   8 44.66    8 37.4   0.954   1.856   146   12.9   2:09 (  0, 64)

* 73P/Schwassmann-Wachmann 3

Outburst occured in early October, and it brightened up to 9.9 mag (Oct. 14, Thomas Lehmann). It is bright as 13.5 mag still now (Dec. 20, Chris Wyatt). It stays observable only until February in the Southern Hemisphere, or until March in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  22 52.82  -17  0.9   1.978   1.824    66   13.3  18:24 ( 29, 33)  
Dec. 31  23  8.82  -14 53.0   2.103   1.888    63   13.7  18:28 ( 34, 33)

* 29P/Schwassmann-Wachmann 1

It brightened in major outburst in late November. Now it is very bright as 11.3 mag (Dec. 20, Chris Wyatt). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   6 41.43   29 28.6   5.083   6.055   170   13.4   0:34 (  0, 84)  
Dec. 31   6 37.59   29 28.0   5.079   6.057   173   13.4   0:03 (  0, 84)

* C/2021 Y1 ( ATLAS )

Now it is 14.2 mag (Dec. 20, Chris Wyatt). The brightness evolution is slower than originally predicted. It stays 13.5 mag until next summer. In the Northern Hemisphere, it stays observable in good condition until spring. In the Southern Hemisphere, it stays observable in good condition for a long time after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   3 42.69    0 10.3   1.716   2.532   137   13.5  21:31 (  0, 55)  
Dec. 31   3 33.96   -2 47.7   1.756   2.485   128   13.5  20:54 (  0, 52)

* 96P/Machholz 1

It will approach to Sun down to 0.1 a.u. on Jan. 31. In the Northern Hemisphere, it will appear in the morning sky at 9 mag in mid February, then it stays observable while the comet will be fading. In the Southern Hemisphere, it stays observable for a long time, although it is not observable from mid January to mid February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  19 31.33  -43 55.8   1.872   1.087    26   14.5  18:24 ( 46,-14)  
Dec. 31  19 50.50  -42 40.7   1.746   0.944    24   13.6  18:28 ( 49,-16)

* C/2022 U2 ( ATLAS )

Brightening very rapidly. Now it is 12.9 mag (Dec. 15, Katsumi Yoshimoto). It brightens up to 13 mag in January. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is not observable until February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  20  9.80   72 57.9   0.811   1.364    98   13.9  18:24 (160, 40)  
Dec. 31  21  9.53   75 40.5   0.741   1.344   101   13.6  18:28 (164, 41)

* 71P/Clark

It will brighten up to 13 mag in winter. But the condition is bad. It is not observable until February in the Southern Hemisphere, or until May in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  17  9.98  -24  6.6   2.555   1.614    13   13.8   5:34 (294, -7)  
Dec. 31  17 32.86  -24 52.6   2.532   1.604    15   13.7   5:37 (296, -6)

* C/2021 E3 ( ZTF )

It brightened up to 9.3 mag in early summer (June 5, Chris Wyatt). Now it is fading. It has already faded down to 15.5 mag (Dec. 10, iTelescope Observatory, Siding Spring). In the Southen Hemisphere, it stays observable in good condition for a long time. It became observable also in the Northern Hemisphere. But it stays locating low for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   8 54.35  -43 29.8   2.590   2.969   102   13.9   2:46 (  0, 11)  
Dec. 31   8 37.61  -42 41.3   2.570   3.032   108   14.1   2:02 (  0, 12)

* C/2021 X1 ( Maury-Attard )

Now it is 14.4 mag (Dec. 20, Chris Wyatt). It stays 14 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   3 59.95  -23 17.2   2.907   3.550   123   14.3  21:47 (  0, 32)  
Dec. 31   3 44.30  -22 16.7   2.956   3.524   117   14.3  21:04 (  0, 33)

* C/2021 P4 ( ATLAS )

It brightened up to 10.4 mag from June to July (July 22, Ken-ichi Kadota). Now it is fading. Appearing in the morning sky in the Souther Hemisphere. However, now it is not detected, fainter than 17.5 mag (Nov. 29, Martin Masek). It will never be observable again in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  17 34.15  -64 20.3   3.082   2.432    41   14.7   5:34 (330,-30)  
Dec. 31  18  6.32  -64 48.3   3.155   2.513    42   14.9   5:37 (330,-31)

* C/2021 T4 ( Lemmon )

Now it is 14.8 mag (Dec. 20, Chris Wyatt). It is expected to brighten up to 8 mag in 2023 July. It will be getting lower after this. And it will be unobservable in February. In the Southern Hemisphere, it will be observable in excellent condition at the high light. In the Northern Hemisphere, it becomes very low at the high lihght. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   0 44.82  -13 38.2   2.978   3.181    92   14.9  18:33 (  0, 41)  
Dec. 31   0 38.13  -13 45.8   3.049   3.112    84   14.9  18:28 (  9, 41)

* 117P/Helin-Roman-Alu 1

Now it is 14.8 mag (Dec. 8, ATLAS Chile). It will be unobservable soon. But it will be observable at 15 mag again in 2023. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  20 40.41  -25 25.0   3.911   3.152    34   14.9  18:24 ( 51,  8)  
Dec. 31  20 51.43  -24 40.6   3.971   3.161    30   15.0  18:28 ( 55,  5)

* C/2020 R7 ( ATLAS )

Now it is 15.1 mag (Oct. 26, Thomas Lehmann). The brightness evolution is slower than originally expected. It stays 14-15 mag for a long time. Now it is not observable. It will be observable in early January in the Northern Hemisphere, or in early February in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  17 38.19  -13 41.0   4.071   3.115    12   15.0   5:34 (282, -7)  
Dec. 31  17 42.98  -12 27.4   4.065   3.138    17   15.0   5:37 (285, -1)

* C/2022 S3 ( PanSTARRS )

Now it is 17.6 mag (Oct. 25, Michael Jager). Tiny comet, but it will approach to Sun down to 0.8 a.u. in January, and to Earth down to 0.6 a.u. in March. It will brighten up to 14 mag from January to March. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable now. It will become observable in early March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  20 55.49  -43 29.2   1.524   0.992    39   15.4  18:24 ( 36, -3)  
Dec. 31  21  8.53  -46 35.4   1.481   0.930    38   15.0  18:28 ( 36, -7)

* 119P/Parker-Hartley

Now it is 14.2 mag (Dec. 9, Masayoshi Yoshimi). It stays observable in good condition at 15 mag from summer to winter. It locates somwwhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   8  2.72   21 13.7   1.586   2.505   153   15.2   1:55 (  0, 76)  
Dec. 31   7 58.27   21 51.9   1.570   2.522   161   15.2   1:23 (  0, 77)

* C/2021 G2 ( ATLAS )

Now it is 15.8 mag (Dec. 15, ATLAS South Africa). It will brighten up to 13 mag from 2024 to 2025. It is observable in excllent condition in the Southern Hemisphere. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9 13.56  -37 52.1   6.511   6.829   104   15.4   3:05 (  0, 17)  
Dec. 31   9 12.15  -38 23.3   6.414   6.795   108   15.4   2:36 (  0, 17)

* C/2021 S3 ( PanSTARRS )

Now it is 15.4 mag (Dec. 15, ATLAS Chile). It is expected to brighten up to 7 mag in early 2024. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays low in 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   5 49.17  -38 21.4   4.614   5.150   118   15.4  23:37 (  0, 17)  
Dec. 31   5 43.42  -38 33.2   4.563   5.085   116   15.4  23:03 (  0, 16)

* 61P/Shajn-Schaldach

Now it is 15.2 mag (Dec. 12, W. Pei). It stays observable in good condition for a long time. But it will be fading after this, and it will be fainter than 18 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   1 32.73    1 55.0   1.632   2.177   110   15.5  19:22 (  0, 57)  
Dec. 31   1 39.41    2 46.4   1.718   2.189   104   15.6  19:01 (  0, 58)

* 77P/Longmore

Now it is 16.7 mag (Dec. 3, Ken-ichi Kadota). It will brighten rapidly up to 14 mag in spring. In the Southern Hemisphere, appearing in the morning sky. It will be observable in excellent condition in spring. In the Northern Hemisphere, it is observable in good condition in winter, but it becomes somewhat low in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  13 35.95   -4  9.6   2.628   2.439    68   15.8   5:34 (320, 43)  
Dec. 31  13 44.91   -5 41.7   2.532   2.428    72   15.6   5:37 (328, 44)

* P/2022 L3 ( ATLAS )

It brightened up to 14.1 mag in autumn (Nov. 14, Thomas Lehmann). Now it is fading. It has already faded down to 16.0 mag (Dec. 13, ATLAS-HKO, Haleakala). It stays observable in excellent condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   1 59.46   27 12.4   1.775   2.467   124   15.7  19:49 (  0, 82)  
Dec. 31   2  1.88   27 50.3   1.860   2.480   118   15.8  19:24 (  0, 83)

* C/2020 Y2 ( ATLAS )

Now it is 15.0 mag (Dec. 20, Chris Wyatt). It was expected to brighten up to 13 mag in spring. But actually, it was fainter than originally expected. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays extremely low for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   2 43.14  -43 43.7   3.348   3.619    98   15.8  20:31 (  0, 12)  
Dec. 31   2 33.62  -41 13.2   3.447   3.653    94   15.9  19:54 (  0, 14)

* C/2020 S4 ( PanSTARRS )

Now it is 15.2 mag (Dec. 7, Ken-ichi Kadota). It stays 16 mag and observable in good condition until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9 35.59   19 14.0   2.664   3.399   131   15.9   3:27 (  0, 74)  
Dec. 31   9 36.67   20  1.4   2.589   3.391   138   15.8   3:01 (  0, 75)

* 116P/Wild 4

It brightened up to 12.7 mag in early 2022 (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. Now it is not observable. It will be observable agin at 16 mag 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. 24  16 48.85  -24 19.6   3.373   2.457    18   15.9   5:34 (297, -4)  
Dec. 31  17  3.39  -24 46.5   3.363   2.477    21   16.0   5:37 (300, -1)

* 285P/LINEAR

It brightened by 6 mag in outburst in early August up to 14.6 mag (Aug. 13, ATLAS-MLO, Mauna Loa). Now it is fading. It has already faded down to 16.8 mag (Dec. 12, A. Diepvens). It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  21 49.42   -8 39.0   2.098   1.731    54   16.0  18:24 ( 50, 32)  
Dec. 31  22  8.37   -8 25.4   2.142   1.724    52   16.0  18:28 ( 53, 30)

* 408P/2020 M7 ( Novichonok-Gerke )

Now it is 16.1 mag (Dec. 10, Purple Mountain Observatory, XuYi Station). It will be observable at 16-17 mag in excellent condition from autumn to winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   4  5.65   -1 40.1   2.668   3.489   141   16.2  21:54 (  0, 53)  
Dec. 31   4  3.17   -1 33.8   2.729   3.492   134   16.3  21:24 (  0, 54)

* C/2018 U1 ( Lemmon )

It was observed at 15 mag from 2021 to 2022. Now it is fading. In the Southern Hemisphere, it stays observable in excellent condition for a long time, although it became extremely low temporarily in November. In the Northern Hemiphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  15 12.70  -58 17.9   6.538   5.906    46   16.3   5:34 (335,-13)  
Dec. 31  15 15.36  -59 22.8   6.508   5.934    50   16.3   5:37 (338,-12)

* 204P/LINEAR-NEAT

Now it is 17.3 mag (Dec. 1, ATLAS-HKO, Haleakala). It will brighten rapidly, and it will be observable at 16 mag in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  10  9.37   14 14.8   1.140   1.864   122   16.4   4:01 (  0, 69)  
Dec. 31  10 14.25   14 35.3   1.097   1.875   128   16.3   3:38 (  0, 69)

* C/2022 E2 ( ATLAS )

Now it is 16.4 mag (Dec. 9, ATLAS Chile). It is expected to brighten up to 12-13 mag from 2024 to 2025. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  10 27.22  -20  6.2   6.154   6.451   103   16.5   4:19 (  0, 35)  
Dec. 31  10 23.94  -20  3.1   6.001   6.407   110   16.5   3:48 (  0, 35)

* C/2021 C5 ( PanSTARRS )

Now it is 17.7 mag (July 9, ATLAS Chile). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  14 12.27  -58  4.5   3.756   3.275    53   16.5   5:34 (341, -8)  
Dec. 31  14 29.73  -60  2.8   3.707   3.267    56   16.5   5:37 (344, -9)

* (65803) Didymos

Due to the DART spacecraft impact to its satellite Dimorphos on Sept. 26, the cometary activity was detected. It brightened up to 12.9 mag (Sept. 28, John Drummond). It is fading after that. It has already faded down to 15.9 mag (Oct. 29, Katsumi Yoshimoto). It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   7 57.79   27 49.1   0.233   1.199   154   16.5   1:50 (  0, 83)  
Dec. 31   7 45.67   29 14.1   0.259   1.235   163   16.6   1:11 (  0, 84)

* 237P/LINEAR

Appearing in the morning sky. It will brighten very rapidly. It is expected to be observable at 11 mag in excellent condition from spring to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  15 16.17  -23 31.7   2.949   2.274    39   17.1   5:34 (311, 13)  
Dec. 31  15 31.76  -24  8.7   2.871   2.249    42   16.7   5:37 (314, 14)

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 16.9 mag (Dec. 12, D. Buczynski). It stays observable at 16 mag for a long time from early 2023 to early 2024. In the Northern Hemisphere, it is observable only until 2023 spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  10 25.10    1 42.5   3.944   4.438   114   17.0   4:17 (  0, 57)  
Dec. 31  10 20.50    0 43.9   3.807   4.406   121   16.8   3:45 (  0, 56)

* C/2019 E3 ( ATLAS )

Now it is 16.7 mag (Dec. 15, ATLAS Chile). Very far object. It stays 17 mag for a long time from 2021 to 2026. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable at all. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   7  6.00  -76 15.4  10.587  10.460    79   16.9   0:57 (  0,-21)  
Dec. 31   6 50.62  -76 29.2  10.573  10.453    80   16.9   0:14 (  0,-22)

* 402P/2020 Q3 ( LINEAR )

It brightened up to 15.3 mag in last winter (Jan. 12, 2022, H. Nohara). Now it is fading. It has already faded down to 17.0 mag (Dec. 1, ATLAS-HKO, Haleakala). It will be observable at 17 mag in good condition in next winter. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  10 25.91   21 32.9   3.875   4.460   120   17.1   4:17 (  0, 76)  
Dec. 31  10 25.99   22 19.3   3.805   4.478   128   17.0   3:50 (  0, 77)

* 22P/Kopff

Now it is 15.9 mag (Nov. 25, Ken-ichi Kadota). It stays observable in good condition after this. But it will be fading gradually after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   0 55.03    0  2.5   2.556   2.905   100   17.1  18:44 (  0, 55)  
Dec. 31   0 59.30    0 43.0   2.693   2.946    94   17.3  18:28 (  3, 56)

* P/2021 N2 ( Fuls )

It brightened very rapidly up to 15.5 mag from last autumn to last winter (Nov. 2, 2021, Toshihiko Ikemura, Hirohisa Sato). Now it is fading slowly. It has already faded down to 16.8 mag (Dec. 5, J.-G. Bosch, F. Kugel). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   6 31.71    9 28.5   3.497   4.454   164   17.1   0:24 (  0, 64)  
Dec. 31   6 27.73    9 23.8   3.513   4.474   166   17.2  23:48 (  0, 64)

* 244P/Scotti

Now it is 17.4 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   6 10.44   26 24.2   2.940   3.923   176   17.2   0:03 (  0, 81)  
Dec. 31   6  5.61   26 24.2   2.948   3.924   171   17.2  23:26 (  0, 81)

* C/2020 F2 ( ATLAS )

Now it is 17.7 mag (Dec. 15, ATLAS-HKO, Haleakala). It stays 17 mag and observable in good condition for a long time until 2023 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  13 36.22    4 16.4   9.126   8.867    71   17.3   5:34 (313, 50)  
Dec. 31  13 36.01    4 33.2   9.010   8.871    78   17.2   5:37 (323, 54)

* C/2019 O3 ( Palomar )

Now it is 16.9 mag (Dec. 12, A. Diepvens). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  17 49.36   63 22.8   9.597   9.594    86   17.3   5:34 (211, 30)  
Dec. 31  17 54.35   63 44.8   9.605   9.610    87   17.3   5:37 (212, 33)

* C/2020 F5 ( MASTER )

It brightened up to 14 mag in 2021. Now it is fading. It has already faded down to 16.8 mag (Dec. 7, Z. Banfalvy). It will be fainter than 18 mag in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  23 18.73   15 29.3   6.667   6.659    85   17.4  18:24 ( 46, 64)  
Dec. 31  23 20.47   15 42.9   6.816   6.698    78   17.4  18:28 ( 58, 60)

* 94P/Russell 4

Now it is 18.8 mag (Dec. 1, ATLAS-HKO, Haleakala). It brightens rapidly, and it is observable at 16.5 mag in good condition in spring. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   8 53.92   24 22.0   1.592   2.445   142   17.6   2:46 (  0, 79)  
Dec. 31   8 52.29   24 58.3   1.527   2.426   149   17.4   2:17 (  0, 80)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Now it is 17.2 mag (Dec. 3, ATLAS Chile). Very large comet. It is expected to brighten up to 14 mag in 2031. In the Southern Hemisphere, it stays observable in good condition for a long time. 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. 24   2 30.70  -61  0.1  18.238  18.178    84   17.4  20:19 (  0, -6)  
Dec. 31   2 29.41  -60 47.8  18.259  18.152    82   17.4  19:50 (  0, -6)

* 395P/2020 H1 ( Catalina-NEAT )

Now it is 17.3 mag (Nov. 25, Toshihiko Ikemura, Hirohisa Sato). It continued brightening even after the perihelion passage. It will be fading after this, and it will be fainter than 18 mag in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  23 14.92   -2 29.7   4.584   4.464    76   17.4  18:24 ( 31, 48)  
Dec. 31  23 19.58   -2  5.3   4.702   4.478    70   17.5  18:28 ( 40, 45)

* 44P/Reinmuth 2

Now it is 17.0 mag (Dec. 13, Purple Mountain Observatory, XuYi Station). It will be fading after this, and it will be fainter than 18 mag in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   2 53.73   22 38.9   1.970   2.759   135   17.5  20:43 (  0, 78)  
Dec. 31   2 53.99   22 16.5   2.068   2.788   128   17.6  20:15 (  0, 77)

* C/2020 H6 ( ATLAS )

Now it is 17.1 mag (Dec. 14, A. Diepvens). Fading slowly. In the Southern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  17 19.09   39 39.4   6.218   5.856    64   17.5   5:34 (238, 26)  
Dec. 31  17 27.03   40 17.2   6.225   5.887    65   17.5   5:37 (239, 30)

* 263P/Gibbs

Now it is 18.3 mag (Dec. 15, ATLAS-HKO, Haleakala). It brightens rapidly, and it is observable at 16.5 mag in good condition from January to March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9 48.17   14 43.8   0.458   1.314   127   17.8   3:39 (  0, 70)  
Dec. 31  10 14.56   16 14.3   0.418   1.288   129   17.5   3:38 (  0, 71)

* 107P/(4015) Wilson-Harrington

Now it is 17.0 mag (Nov. 26, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   7 46.53   19 32.7   0.829   1.776   156   17.6   1:39 (  0, 74)  
Dec. 31   7 33.88   19 48.0   0.864   1.836   166   17.5   0:59 (  0, 75)

* 157P/Tritton

It brightened up to 16.1 mag in autumn (Sept. 23, Michael Jager). Then it is fading very rapidly. It has already faded down to 18.0 mag (Nov. 26, H. Nohara). It will be getting higher after this also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  11 12.19   -4 27.1   1.434   1.887   100   17.5   5:03 (  0, 50)  
Dec. 31  11 15.91   -6  5.6   1.399   1.924   106   17.6   4:40 (  0, 49)

* C/2021 S4 ( Tsuchinshan )

Now it is 17.3 mag (Dec. 3, H. Nohara). It stays 17 mag for a long time from 2023 to 2024. It is observable in good condition in the Northern Hemisphere. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   2 20.62   28  9.4   6.455   7.116   129   17.6  20:10 (  0, 83)  
Dec. 31   2 20.14   28  3.0   6.529   7.101   122   17.6  19:42 (  0, 83)

* C/2021 QM45 ( PanSTARRS )

Now it is 17.3 mag (Dec. 3, Ken-ichi Kadota). In the Northern Hemisphere, it stays observable at 17 mag in good condition for a long time until winter. In the Southern Hemisphere, it stays extremely low for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   8 11.41   50 59.9   2.238   3.085   143   17.6   2:04 (180, 74)  
Dec. 31   8  6.42   51  4.8   2.243   3.116   147   17.7   1:31 (180, 74)

* 246P/NEAT

Now it is 16.5 mag (Dec. 12, ATLAS Chile). It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It will be fainter than 18 mag soon. But it may stay bright for some more time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   0 10.40  -15 16.2   4.158   4.181    84   17.6  18:24 (  8, 40)  
Dec. 31   0 13.54  -14 26.2   4.278   4.197    78   17.7  18:28 ( 17, 39)

* C/2019 F1 ( ATLAS-Africano )

It brightened up to 14.2 mag in 2021 summer (July 18, 2021, Taras Prystavski). Now it is fading. It has already faded down to 17.0 mag (Dec. 13, ATLAS Chile). In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   1 14.16  -20  3.2   5.747   5.935    96   17.7  19:03 (  0, 35)  
Dec. 31   1 13.99  -19  5.2   5.894   5.979    90   17.7  18:35 (  0, 36)

* P/2021 V2 ( Fuls )

Now it is 17.6 mag (Dec. 2, ATLAS Chile). It is observable at 17.5 mag in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9  4.18    0 32.5   2.772   3.503   131   17.8   2:56 (  0, 55)  
Dec. 31   9  2.86    0  8.3   2.705   3.500   138   17.7   2:27 (  0, 55)

* 211P/Hill

Now it is 18.9 mag (Nov. 24, Catalina Sky Survey). It brightens up to 17.5 mag from January to February. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  11 39.67   14 23.1   1.980   2.387   102   17.8   5:31 (  0, 69)  
Dec. 31  11 46.58   14 59.8   1.908   2.397   107   17.8   5:10 (  0, 70)

* C/2020 J1 ( SONEAR )

It brightened up to 12.3 mag from spring to summer in 2021 (June 15, 2021, Marco Goiato). Now it is fading. It has already faded down to 18.2 mag (Nov. 21, D. Buczynski). It will be fainter than 18 mag in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24  12 44.19   34 39.9   6.137   6.318    96   17.8   5:34 (268, 77)  
Dec. 31  12 43.06   35 44.4   6.079   6.365   102   17.8   5:37 (262, 84)

* 180P/NEAT

It is observable at 17 mag from winter to spring. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 24   9 49.73   29  3.7   2.059   2.799   130   18.0   3:41 (  0, 84)  
Dec. 31   9 50.45   30  6.0   1.980   2.781   136   17.9   3:15 (  0, 85)

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