Weekly Information about Bright Comets (2022 Jan. 29: North)

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 Updated on February 1, 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/2021 A1 ( Leonard )

It brightened up to 3 mag in outburst on Dec. 14. Then several small outbursts occured repeatedly, and the comet has been fading gradually. But it is bright as 8.5 mag still now (Jan. 28, Chris Wyatt). In the Southern Hemisphere, it becomes unobservable temporarily in early February. But it will appear in the morning sky in mid February. In the Northern Hemisphere, it will become observable again at 13 mag in late April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  21 35.93  -36  5.7   1.660   0.824    21    8.8  18:52 ( 58,-18)  
Feb.  5  21 32.64  -35 47.0   1.783   0.922    20    9.4  18:58 ( 62,-24)

* 19P/Borrelly

Now it is bright as 8.9 mag (Jan. 28, Chris Wyatt). It stays bright as 9-10 mag until March. In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it will be extremely low in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   1 18.62    2  5.4   1.253   1.307    70    8.9  18:52 ( 49, 46)  
Feb.  5   1 35.67    7  4.4   1.283   1.307    68    8.9  18:58 ( 58, 47)

* C/2019 L3 ( ATLAS )

Now it is 9.4 mag (Jan. 28, Chris Wyatt). It stays bright as 10 mag until spring for a long time. It stays observable in good condition for a long time. It locates somewhat low in the Southern Hemisphere, 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   6 46.34   27 23.0   2.664   3.559   151    9.9  22:12 (  0, 82)  
Feb.  5   6 41.72   25 56.9   2.722   3.563   143   10.0  21:40 (  0, 81)

* 104P/Kowal 2

Brightened very rapidly. Now it is very bright as 9.8 mag (Jan. 28, Chris Wyatt). It is observable at 10 mag in good condition until February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   2  7.31    3 17.1   0.639   1.098    82   10.3  18:52 ( 34, 54)  
Feb.  5   2 42.53    5 42.2   0.644   1.122    84   10.5  18:58 ( 35, 56)

* 67P/Churyumov-Gerasimenko

Now it is very bright as 10.3 mag (Jan. 24, Charles S. Morris). It stays observable in good condition for a long time. It locates somewhat low in the Southern Hemisphere, 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   8 33.25   29  0.8   0.632   1.609   168   10.3   0:03 (  0, 84)  
Feb.  5   8 27.99   28 41.4   0.692   1.661   163   10.7  23:26 (  0, 84)

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.7 mag (Jan. 27, Osamu Miyazaki). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it stays observable in good condition until autumn. However, it is not observable at the high light from autumn to 2023 summer. In the Southern Hemisphere, it will be observable after February. Then it will be observable in good condition at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  18 19.91   11 47.4   4.759   4.144    46   10.6   5:34 (275, 28)  
Feb.  5  18 25.19   11 35.1   4.645   4.081    49   10.4   5:29 (278, 32)

* 22P/Kopff

In the Northern Hemisphere, it stays extremely low until spring. In the Southern Hemisphere, it stays observable at 11 mag until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  18 18.89  -20 58.6   2.342   1.627    34   11.6   5:34 (303,  8)  
Feb.  5  18 41.65  -20 50.9   2.294   1.608    36   11.4   5:29 (303,  8)

* C/2019 T4 ( ATLAS )

Now it is 12.6 mag (Jan. 21, Ken-ichi Kadota). It will brighten up to 11.5 mag in spring. It stas observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  12  8.06  -29 30.6   3.920   4.380   111   12.0   3:37 (  0, 25)  
Feb.  5  12  8.09  -29 13.1   3.814   4.366   118   11.9   3:09 (  0, 26)

* 9P/Tempel 1

Now it is 14.9 mag (Jan. 4, Ken-ichi Kadota). It will brighten up to 12 mag from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  17  2.00  -19 34.8   1.976   1.582    52   12.4   5:34 (315, 21)  
Feb.  5  17 24.18  -20 32.4   1.924   1.569    54   12.3   5:29 (316, 21)

* 4P/Faye

It brightened up to 10.6 mag in autumn (Oct. 10, Osamu Miyazaki). Now it is fading. But it is still bright as 11.7 mag (Jan. 24, Osamu Miyazaki). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   6 20.35    9 46.3   1.256   2.134   144   12.9  21:46 (  0, 65)  
Feb.  5   6 20.32   10 29.3   1.342   2.175   137   13.2  21:19 (  0, 66)

* 29P/Schwassmann-Wachmann 1

Now it is bright as 11.1 mag (Jan. 24, Charles S. Morris). It has a large diffuse coma. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   4 15.63   30  1.4   5.423   5.953   118   13.5  19:42 (  0, 85)  
Feb.  5   4 15.64   29 48.8   5.527   5.955   111   13.5  19:14 (  0, 85)

* C/2020 Y2 ( ATLAS )

Now it is 15.1 mag (Dec. 14, Chris Wyatt). It will brighten up to 13 mag in spring. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  12  7.32  -63 30.4   3.273   3.409    89   13.9   3:37 (  0, -9)  
Feb.  5  11 45.64  -65 58.6   3.183   3.384    93   13.8   2:48 (  0,-11)

* C/2020 J1 ( SONEAR )

It brightened up to 12.3 mag from spring to summer (June 15, Marco Goiato). Now it is fading. It has already faded down to 14.2 mag (Jan. 15, Ken-ichi Kadota). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  14 24.80    9 43.6   4.012   4.257    97   14.0   5:34 (349, 64)  
Feb.  5  14 21.67   11 24.9   3.928   4.295   105   14.0   5:22 (  0, 66)

* 116P/Wild 4

Now it is 14.5 mag (Jan. 12, Michael Jager). It will brighten rapidly, and it will be observable at 13.5 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  10  0.96   17 38.6   1.528   2.483   161   14.3   1:30 (  0, 73)  
Feb.  5   9 56.06   18  4.4   1.486   2.462   169   14.1   0:58 (  0, 73)

* 6P/d'Arrest

It brightened up to 9.8 mag from autumn to winter (Nov. 22, Thomas Lehmann). Now it is fading. It has already faded down to 14.4 mag (Jan. 24, Charles S. Morris). It will be fainter than 18 mag in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   1  0.35  -11 45.6   2.242   1.977    61   14.3  18:52 ( 43, 32)  
Feb.  5   1 15.04   -9 56.5   2.349   2.026    59   14.9  18:58 ( 49, 31)

* C/2021 O3 ( PanSTARRS )

Now it is 15.5 mag (Jan. 22, Ken-ichi Kadota). It is expected to brighten very rapidly up to 4.5 mag in April. However, it is not observable at the high light. In the Northern Hemisphere, it stays observable until early February when it brightens up to 14 mag. Then it will appear at 6 mag in mid May, and it stays observable in good condition after that while the comet will be fading. In the Southern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  22 46.71    0 53.9   2.544   1.834    35   14.7  18:52 ( 79, 17)  
Feb.  5  22 56.93    0 33.3   2.491   1.717    30   14.3  18:58 ( 82, 12)

* C/2021 E3 ( ZTF )

Now it is 14.9 mag (Nov. 28, Thomas Lehmann). It is expected to brighten up to 11 mag from spring to summer. In the Southen Hemisphere, it is not observable until February, but it stays observable in good condition for a long time after that. In the Northern Hemisphere, it is hardly observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  19 42.58  -11 52.3   3.372   2.442    16   14.5   5:34 (283, -2)  
Feb.  5  19 49.56  -13  1.9   3.284   2.386    20   14.4   5:29 (286,  0)

* C/2020 V2 ( ZTF )

Now it is 14.7 mag (Jan. 14, Thomas Lehmann). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it locates extremely low from January to February. Then it stays unobservable until 2023 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  13  1.17   47 51.2   4.701   5.271   120   14.6   4:30 (180, 77)  
Feb.  5  12 56.82   49 41.1   4.598   5.214   124   14.5   3:58 (180, 75)

* C/2020 T2 ( Palomar )

It brightened up to 9.5 mag in early summer (June 27, Marco Goiato). Now it is fading. It has faded down to 12.7 mag in autumn (Nov. 22, Thomas Lehmann). Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky at 15 mag in late February. In the Northern Hemisphere, it is not observable until June when the comet will fade down to 17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  20 35.44  -32 48.1   4.034   3.093    14   14.6   5:34 (294,-24)  
Feb.  5  20 48.48  -32 34.1   4.076   3.149    17   14.8   5:29 (295,-22)

* C/2019 U5 ( PanSTARRS )

Now it is 15.0 mag (Jan. 14, Ken-ichi Kadota). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  16 42.50   32 32.9   5.316   5.182    76   14.8   5:34 (263, 58)  
Feb.  5  16 42.92   33 12.3   5.201   5.141    81   14.7   5:29 (264, 62)

* 117P/Helin-Roman-Alu 1

Now it is 15.8 mag (Oct. 4, Thomas Lehmann). Appearing in the morning. It will brighten up to 13 mag in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  17 25.89  -24 31.2   3.736   3.140    46   14.8   5:34 (314, 14)  
Feb.  5  17 36.43  -24 50.5   3.654   3.132    51   14.7   5:29 (317, 15)

* C/2020 R7 ( ATLAS )

Now it is 15.9 mag (Jan. 2, Thomas Lehmann). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  22 22.46  -59 39.2   4.346   3.717    45   14.9  18:52 ( 32,-23)  
Feb.  5  22 24.97  -58 33.9   4.315   3.678    44   14.8  18:58 ( 35,-26)

* 57P/du Toit-Neujmin-Delporte

It brightened up to 11.5 mag in outburst in October (Oct. 22, Marco Goiato). Now it is fading. It has already faded down to 14.1 mag (Jan. 1, J.-G. Bosch, F. Kugel, J. Nicolas). In the Southern Hemisphere, it is already unobservable. In the Northern Hemisphere, it stays observable until early February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  22 44.33   -7 27.9   2.737   1.960    30   14.9  18:52 ( 72, 12)  
Feb.  5  23  0.51   -5 55.3   2.803   1.989    28   15.2  18:58 ( 76,  9)

* A/2021 F1

Now it is bright as 13.8 mag (Jan. 18, Ken-ichi Kadota. Cometary activity was detected. In the Northern Hemisphere, it is observable only until early March. In the Southern Hemisphere, it is not observable until late May. But it will be observable in good condition after that. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  18 24.84   45 59.9   1.484   1.497    71   15.2   5:34 (236, 41)  
Feb.  5  19 20.53   48 13.0   1.432   1.418    69   14.9   5:29 (232, 36)

* C/2018 U1 ( Lemmon )

Now it is 15.9 mag (Oct. 8, Thomas Lehmann). It stays at 14-15 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it locates extremely low in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  17 15.18  -32 37.1   5.629   5.038    49   15.3   5:34 (321,  9)  
Feb.  5  17 17.48  -33 34.1   5.537   5.045    55   15.2   5:29 (325, 11)

* 110P/Hartley 3

It brightened rapidly. Now it is 14.7 mag (Jan. 11, Michael Jager). It stays 15 mag until February, and it is observable in excellent condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   8  9.17   14 27.6   1.558   2.535   170   15.3  23:34 (  0, 69)  
Feb.  5   8  3.48   14 13.3   1.587   2.546   163   15.4  23:01 (  0, 69)

* C/2020 PV6 ( PanSTARRS )

Now it is 15.6 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  16  4.32   25 57.6   2.637   2.668    81   15.4   5:34 (282, 63)  
Feb.  5  15 58.51   28  4.8   2.556   2.706    87   15.4   5:29 (284, 70)

* C/2020 K1 ( PanSTARRS )

Now it is 15.8 mag (Jan. 14, Thomas Lehmann). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until November. But it becomes unobservable after that. In the Southern Hemisphere, it is not observable until February. But it will be observable in good condition at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  18 35.63   17 29.8   5.892   5.280    47   15.5   5:34 (268, 28)  
Feb.  5  18 40.01   17 22.3   5.804   5.232    50   15.4   5:29 (270, 32)

* 8P/Tuttle

It brightened very rapidly, and brightened up to 8.9 mag (Sept. 11, Chris Wyatt). Now it is fading. It has already faded down to 15.7 mag (Dec. 7, E. Cortes, N. Paul, B. Lutkenhoner). In the Southern Hemisphere, it stays observable after this while the comet will be fading. It is not observable after this in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  17  4.23  -54 34.1   2.724   2.312    55   15.4   5:34 (336, -8)  
Feb.  5  17 17.22  -54 47.0   2.730   2.382    59   15.7   5:29 (337, -7)

* 70P/Kojima

Now it is 15.8 mag (Jan. 27, Toshihiko Ikemura, Hirohisa Sato). It stays 15.5 mag until March, and it is observable in excellent condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  11 53.73    7 32.9   1.332   2.128   132   15.7   3:22 (  0, 62)  
Feb.  5  11 54.22    8 10.3   1.297   2.147   139   15.7   2:55 (  0, 63)

* C/2020 M5 ( ATLAS )

Now it is 15.3 mag (Jan. 27, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 15-16 mag for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  12 55.03   12 20.6   2.804   3.400   119   15.7   4:24 (  0, 67)  
Feb.  5  12 46.24   11 56.9   2.732   3.432   128   15.7   3:47 (  0, 67)

* C/2021 P4 ( ATLAS )

Now it is 16.0 mag (Dec. 28, D. Buczynski). It is expected to brighten up to 11 mag in summer. In the Northern Hemisphere, it stays observable in good condition until June when it brightens up to 11 mag. But it is not observable after the high light. In the Souther Hemisphere, it is not observable until October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  23  7.06   50 54.1   2.920   2.842    75   15.9  18:52 (130, 42)  
Feb.  5  23 17.04   50 55.5   2.898   2.763    72   15.7  18:58 (131, 38)

* 132P/Helin-Roman-Alu 2

It brightened up to 13.1 mag in autumn (Oct. 28, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 16.1 mag (Jan. 21, Charles S. Morris). It stays observable in good condition for a long time. But it will be fainter than 18 mag in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   2 32.51    8 29.0   1.572   1.852    89   15.9  18:52 ( 27, 61)  
Feb.  5   2 46.88    9 48.8   1.662   1.880    86   16.2  18:58 ( 37, 60)

* C/2021 O1 ( Nishimura )

It was observed at 9-10 mag from late July to early August. Although it had been unobservable for a long time, it is appearing in the morning sky now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  16 24.48  -25 48.4   3.129   2.775    60   15.9   5:34 (327, 21)  
Feb.  5  16 30.15  -26 37.0   3.117   2.862    65   16.0   5:29 (331, 22)

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.1 mag (Jan. 3, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag until March, and it stays observable in excellent condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   6  3.75    6 49.4   3.148   3.947   139   15.9  21:29 (  0, 62)  
Feb.  5   6  1.79    7 47.6   3.215   3.949   132   16.0  21:00 (  0, 63)

* C/2020 H6 ( ATLAS )

Now it is 16.3 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16 mag from 2021 to 2022. Appearing in the morning sky also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  16  3.75   14 47.3   4.929   4.798    76   16.2   5:34 (300, 57)  
Feb.  5  16  7.90   16 15.1   4.847   4.809    81   16.2   5:29 (304, 61)

* C/2019 F1 ( ATLAS-Africano )

Now it is 16.5 mag (Dec. 19, E. Cortes, B. Lutkenhoner). It will be fading slowly after this. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  23 47.33  -46 47.1   4.710   4.103    47   16.2  18:52 ( 34, -5)  
Feb.  5  23 56.27  -45  0.3   4.775   4.133    44   16.2  18:58 ( 39, -7)

* P/2021 N2 ( Fuls )

Brightened rapidly. Now it is 16.0 mag (Jan. 1, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15.5-16 mag in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   2 18.40   11 29.6   3.739   3.824    87   16.3  18:52 ( 37, 62)  
Feb.  5   2 23.41   11 43.1   3.847   3.829    81   16.4  18:58 ( 49, 58)

* C/2020 O2 ( Amaral )

It was observed at 15 mag in 2021. Now it is fading. It stays observable at 17 mag for a while in 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  18 15.36    1  9.3   5.703   5.007    41   16.6   5:34 (286, 23)  
Feb.  5  18 20.36    2 12.5   5.648   5.020    46   16.6   5:29 (288, 27)

* C/2020 F7 ( Lemmon )

Now it is 17.7 mag (Jan. 2, J. Drummond). It brightened rapidly. It stays 17 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it will be observable only in extremely low sky from autumn to winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   7 48.51  -47  0.4   4.889   5.362   113   16.7  23:13 (  0,  8)  
Feb.  5   7 38.08  -47 13.3   4.902   5.368   113   16.7  22:35 (  0,  8)

* C/2020 S4 ( PanSTARRS )

Now it is 16.7 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 14 mag in early 2023. It stays observable in good condition until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   4 18.09    5  6.1   4.307   4.790   113   16.8  19:44 (  0, 60)  
Feb.  5   4 18.18    5 41.3   4.363   4.748   107   16.8  19:17 (  0, 61)

* C/2021 U5 ( Catalina )

Now it is 16.9 mag (Jan. 2, J. Drummond). It is observable at 16.5 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  10 21.28  -26 54.5   1.616   2.366   129   16.9   1:50 (  0, 28)  
Feb.  5  10 21.30  -25 37.1   1.565   2.368   135   16.8   1:23 (  0, 29)

* 430P/2021 Q2 ( Scotti )

First return of a new periodic comet which brightened up to 17 mag in 2011. Now it is 18.2 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It brightened up to 16.8 mag in October (Oct. 10, Ken-ichi Kadota), however, it has been fading after that. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  14 37.55  -10 55.7   1.355   1.652    88   16.8   5:34 (349, 43)  
Feb.  5  14 50.04  -11 57.8   1.317   1.675    92   16.8   5:29 (353, 43)

* C/2019 O3 ( Palomar )

Now it is 16.9 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). 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)  
Jan. 29  19  3.87   49 43.2   9.286   9.020    71   16.8   5:34 (230, 35)  
Feb.  5  19  7.42   50 24.1   9.285   9.029    72   16.9   5:29 (230, 39)

* 230P/LINEAR

Now it is 18.7 mag (Jan. 1, W. Hasubick). It was expected to brighten up to 16.5-17 mag in winter. In its last apparition in 2015, it brightened up to 13 mag. But actually, it is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   0 25.21  -10 32.6   2.023   1.646    53   16.9  18:52 ( 52, 28)  
Feb.  5   0 41.78   -8 11.0   2.046   1.626    51   16.9  18:58 ( 57, 27)

* C/2020 U5 ( PanSTARRS )

Now it is 16.6 mag (Dec. 27, Ken-ichi Kadota). It started fading before the perihelion passage. It was predicted to stay at 16 mag for a long time, but actually, it will be fainter than 18 mag in autumn. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2023. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  22 48.14   82 49.6   3.512   3.838   101   16.9  18:52 (172, 37)  
Feb.  5  23  0.31   81  2.2   3.561   3.825    98   16.9  18:58 (169, 37)

* 52P/Harrington-Abell

Now it is 16.7 mag (Dec. 29, Ken-ichi Kadota). It stays observable at 17 mag from autumn to winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  12 53.53   -9 16.9   1.483   2.074   112   16.9   4:22 (  0, 46)  
Feb.  5  12 55.07  -10 18.7   1.442   2.106   119   17.0   3:56 (  0, 45)

* 254P/McNaught

Now it is 16.7 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It continued brightening for a while even after the perihelion passage. It stays observable at 16-17 mag in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   4 22.06   -9 33.6   3.550   3.989   109   17.0  19:48 (  0, 46)  
Feb.  5   4 22.51   -8 23.5   3.653   4.008   104   17.1  19:21 (  0, 47)

* 181P/Shoemaker-Levy 6

It has not been observed yet in this return. It was predicted to brighten up to 16.5 mag in January. It will fade out rapidly after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  23 43.98   -2 31.4   1.629   1.191    46   17.1  18:52 ( 66, 27)  
Feb.  5   0  7.94    1 40.6   1.658   1.215    46   17.5  18:58 ( 72, 27)

* 81P/Wild 2

Now it is 17.4 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 11.5 mag in 2022 winter. It stays observable while the comet will be brightening slowly. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   2 59.33   13 28.4   2.829   3.116    97   17.2  18:52 ( 17, 68)  
Feb.  5   3  1.97   13 48.4   2.895   3.078    91   17.1  18:58 ( 35, 65)

* C/2020 F2 ( ATLAS )

Now it is 17.2 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17-18 mag for a long time until 2024. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  14 37.73   -4 26.8   8.811   8.871    90   17.2   5:34 (347, 50)  
Feb.  5  14 36.48   -4  5.7   8.681   8.867    97   17.1   5:29 (357, 51)

* 274P/Tombaugh-Tenagra

Now it is 17.6 mag (Jan. 1, J.-G. Bosch, F. Kugel, J. Nicolas). It is observable at 17 mag from November to March. It is observable in good condition in the Northern Hemisphere, but it locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   5 19.46   29 52.6   1.735   2.504   132   17.2  20:45 (  0, 85)  
Feb.  5   5 19.62   30 23.1   1.794   2.495   125   17.2  20:18 (  0, 85)

* 325P/Yang-Gao

It has not been observed yet in this apparition. It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than 19.2 mag (Jan. 22, John Drummond). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  15 34.37  -33 12.9   1.606   1.571    70   17.5   5:34 (341, 19)  
Feb.  5  16  0.03  -34  1.7   1.538   1.542    71   17.3   5:29 (340, 18)

* C/2019 T2 ( Lemmon )

Now it is 16.4 mag (Oct. 4, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  11 15.15  -54 24.2   3.591   3.896   100   17.3   2:44 (  0,  0)  
Feb.  5  11  3.41  -53 46.7   3.554   3.945   106   17.3   2:05 (  0,  1)

* C/2021 G2 ( ATLAS )

Now it is 17.4 mag (Jan. 2, J. Drummond). It will brighten up to 13-14 mag from 2024 to 2025. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   7 19.50  -31 46.1   7.911   8.529   126   17.3  22:44 (  0, 23)  
Feb.  5   7 17.07  -31 33.7   7.890   8.491   124   17.3  22:15 (  0, 23)

* C/2021 T2 ( Fuls )

Now it is 17.8 mag (Jan. 2, Ken-ichi Kadota). It is expected to brighten up to 13.5 mag from June to July. It is observable only in the Southern Hemisphere at the high light. In the Northern Hemisphere, it is observable only until March when it brightens up to 16.5 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   1  9.71    7 27.2   2.381   2.247    70   17.4  18:52 ( 57, 48)  
Feb.  5   1 10.67    5 38.6   2.441   2.171    62   17.3  18:58 ( 63, 41)

* 99P/Kowal 1

Now it is 17.3 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It will be observable at 17 mag in good condition in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  13 41.73   -9 26.1   4.414   4.714   101   17.4   5:10 (  0, 45)  
Feb.  5  13 43.15   -9 36.4   4.307   4.713   108   17.3   4:44 (  0, 45)

* 73P/Schwassmann-Wachmann 3

Now it is 18.2 mag (Jan. 28, Ken-ichi Kadota). It is expected to brighten up to 11 mag from summer to autumn. It stays observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes extremely low from August to September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  11  4.55   24 11.3   1.694   2.576   146   17.6   2:34 (  0, 79)  
Feb.  5  10 59.92   25 25.9   1.601   2.521   153   17.3   2:01 (  0, 80)

* C/2020 U4 ( PanSTARRS )

Now it is 17.8 mag (Jan. 8, Toshihiko Ikemura, Hirohisa Sato). It stays 17-18 mag for a long time from 2021 to 2022. It is observable in excellent condition in the Northern Hemisphere, It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   2 48.03   28 42.5   5.131   5.378    99   17.4  18:52 ( 55, 80)  
Feb.  5   2 44.25   28 12.8   5.259   5.374    91   17.4  18:58 ( 72, 73)

* C/2021 D2 ( ZTF )

Now it is 17.1 mag (Jan. 14, Thomas Lehmann). It was expected to brighten up to 15.5 mag in winter. But actually, it is fading even before the perihelion passage. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable at all in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  16 43.20   82  9.6   2.548   2.947   104   17.5   5:34 (187, 41)  
Feb.  5  16 25.61   85 43.1   2.537   2.946   104   17.5   5:29 (183, 39)

* C/2018 N2 ( ASASSN )

Now it is 17.7 mag (Jan. 1, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. In the Southern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  14 54.29   43  2.4   7.407   7.649   100   17.5   5:34 (226, 78)  
Feb.  5  14 53.86   43 34.2   7.390   7.696   104   17.5   5:29 (208, 80)

* P/2020 V4 ( Rankin )

Now it is 17.5 mag (Jan. 3, Toshihiko Ikemura, Hirohisa Sato). 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)  
Jan. 29   7 47.72    3 31.7   4.307   5.242   159   17.5  23:13 (  0, 58)  
Feb.  5   7 44.92    3 47.8   4.339   5.249   155   17.6  22:43 (  0, 59)

* A/2021 X1

Now it is 17.7 mag (Jan. 7, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15-16 mag in 2023. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   7 18.88  -24  2.8   4.710   5.429   132   17.6  22:43 (  0, 31)  
Feb.  5   7  9.82  -23 31.2   4.693   5.383   130   17.6  22:07 (  0, 31)

* 284P/McNaught

It brightened up to 14.5 mag in autumn (Oct. 1, Ken-ichi Kadota). Now it is fading. It has already faded down to 16.4 mag (Jan. 1, Toshihiko Ikemura, Hirohisa Sato). It will be fading rapidly after this. It will be fainter than 18 mag in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   0 49.00   -5  7.8   2.807   2.482    60   17.6  18:52 ( 51, 36)  
Feb.  5   0 59.90   -3 52.0   2.898   2.500    56   17.8  18:58 ( 57, 33)

* 408P/2020 M7 ( Novichonok-Gerke )

It brightened very rapidly. Now it is 17.8 mag (Jan. 3, Purple Mountain Observatory, XuYi Station). It will brighten up to 16 mag, and it will be observable in good condition in 2022 winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   0  9.32   -0 37.8   4.165   3.660    53   17.7  18:52 ( 63, 32)  
Feb.  5   0 16.69   -0  8.2   4.236   3.650    47   17.7  18:58 ( 69, 28)

* C/2021 Y1 ( ATLAS )

Now it is 17.5 mag (Jan. 1, H. Nohara). It is expected to brighten up to 12 mag from winter to summer in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 spring. In the Southern Hemisphere, it is not observable until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   1 30.38   49 58.4   5.108   5.244    92   17.7  18:52 (135, 64)  
Feb.  5   1 34.44   48 51.8   5.146   5.185    86   17.7  18:58 (129, 60)

* C/2017 Y2 ( PanSTARRS )

It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29  15 42.06  -36  0.8   6.115   5.820    68   17.7   5:34 (340, 15)  
Feb.  5  15 41.07  -36 45.9   6.030   5.852    74   17.7   5:29 (345, 16)

* 108P/Ciffreo

It brightened even after the perihelion passage, and it brightened up to 13.5 mag in December (Dec. 6, Katsumi Yoshimoto). Now it is fading. But it is still bright as 16.3 mag (Jan. 24, Charles S. Morris). It is observable in excellent 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)  
Jan. 29   6 41.08   40 34.3   1.250   2.134   145   17.7  22:07 (180, 84)  
Feb.  5   6 39.64   40 10.2   1.330   2.173   138   18.0  21:38 (180, 85)

* 10P/Tempel 2

It brightened up to 10.1 mag in spring (Apr. 10, Marco Goiato). Now it is fading. It has already faded down to 16.5 mag (Dec. 30, Ken-ichi Kadota). It stays observable in good condition for a long time after this while the comet will fading. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   3 45.72    9 53.5   2.558   3.004   107   17.8  19:12 (  0, 65)  
Feb.  5   3 48.30   10 36.8   2.692   3.042   101   18.0  18:58 (  6, 66)

* 440P/2021 W2 ( Kobayashi )

First return of a new periodic comet which brightened up to 16.5 mag in 1997. Now it is 19.4 mag (Jan. 11, Purple Mountain Observatory, XuYi Station). It is fainter than originally predicted by 2 mag. It is observable in good condition from January to March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Jan. 29   8 39.82   27 18.9   1.171   2.149   170   19.7   0:09 (  0, 82)  
Feb.  5   8 34.87   26 31.2   1.158   2.129   166   19.6  23:32 (  0, 81)

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