Weekly Information about Bright Comets (2023 Feb. 18: North)

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 Updated on February 18, 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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* 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 fading. But it is still very bright as 6.9 mag (Feb. 16, Chris Wyatt). In the Northern Hemisphere, it stays observable in excellent condition for a long time. It is observable in good condition after this also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   4 39.83   11 28.0   0.609   1.256   101    6.9  19:09 ( 12, 65)  
Feb. 25   4 38.08    4  4.5   0.817   1.311    92    7.7  19:15 ( 26, 56)

* C/2017 K2 ( PanSTARRS )

Now it is very bright as 8.8 mag (Feb. 16, 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. In the Northern Hemisphere, it is not observable until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   1  6.73  -64 15.9   2.229   1.954    61    7.9  19:09 ( 23,-19)  
Feb. 25   1 46.50  -60 24.7   2.243   1.990    62    8.0  19:15 ( 26,-16)

* C/2022 A2 ( PanSTARRS )

It brightened very rapidly. Now it is very bright as 9.9 mag (Feb. 15, Osamu Miyazaki). It stays 9-10 mag until March. In the Northern Hemisphere, it stays observable for a long time. But it locates low until spring. In the Southern Hemisphere, it is not observable until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  21 36.61   54 50.8   1.864   1.735    66    9.7   5:18 (219, 24)  
Feb. 25  22 10.30   52 41.0   1.962   1.738    62    9.8   5:11 (220, 22)

* C/2020 V2 ( ZTF )

Now it is 10.3 mag (Feb. 15, Osamu Miyazaki). It stays bright as 10 mag for a long time until autumn. In the Northern Hemisphere, it stays observable in good condition until autumn. In the Southern Hemipshere, it stays unobservable until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   1 38.36   46 50.9   2.451   2.407    75    9.8  19:09 (123, 51)  
Feb. 25   1 43.18   43 33.7   2.553   2.378    68    9.8  19:15 (119, 45)

* 96P/Machholz 1

It approached to Sun down to 0.1 a.u. on Jan. 31. Appearing in the morning sky. It was bright as 7.0-7.5 mag in early February (Feb. 5, Michael Jager). Now it is fading rapidly. It has already faded down to 8.8 mag (Feb. 17, Juan Jose Gonzalez). It stays observable after this while the comet will be fading. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  20 10.30   -6 34.1   1.297   0.636    28   10.9   5:18 (284,  8)  
Feb. 25  20 11.89   -6 53.6   1.399   0.806    34   12.3   5:11 (287, 11)

* C/2020 K1 ( PanSTARRS )

Now it is 13.2 mag (Nov. 27, Ken-ichi Kadota). It is expected to brighten up to 10 mag from spring to summer. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became 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)  
Feb. 18  19 19.64  -33 37.3   3.820   3.172    43   11.4   5:18 (312,  0)  
Feb. 25  19 27.90  -35  4.8   3.718   3.156    48   11.3   5:11 (315,  0)

* 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 11.9 mag still now (Feb. 16, Chris Wyatt). It is observable in excellent 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)  
Feb. 18   9 24.99  -35 12.7   4.319   5.034   132   11.7  23:32 (  0, 20)  
Feb. 25   9 20.07  -35 14.5   4.355   5.075   132   11.8  22:59 (  0, 20)

* 81P/Wild 2

Now it is 12.8 mag (Feb. 2, Chris Wyatt). It stays 11-12 mag until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  16 32.31  -18 27.4   1.598   1.720    79   11.9   5:18 (336, 33)  
Feb. 25  16 46.85  -18 45.6   1.561   1.745    83   12.0   5:11 (338, 33)

* C/2019 U5 ( PanSTARRS )

Now it is 12.2 mag (Feb. 15, Osamu Miyazaki). It stays 12 mag until summer. It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  13 14.13    0 15.0   2.913   3.642   131   12.0   3:25 (  0, 55)  
Feb. 25  13  2.90   -0  7.0   2.814   3.636   140   11.9   2:47 (  0, 55)

* C/2022 U2 ( ATLAS )

It brightened very rapidly up to 9.6 mag in late January (Jan. 25, Toshihiko Ikemura, Hirohisa Sato). It is still bright as 11.2 mag (Feb. 14, Osamu Miyazaki). It stays observable in good condition for a long time. But it will be fading after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   5 35.06   26 23.6   0.683   1.423   115   12.2  19:45 (  0, 81)  
Feb. 25   5 51.11   18 34.8   0.769   1.463   112   12.7  19:33 (  0, 73)

* C/2019 T4 ( ATLAS )

Now it is bright as 12.9 mag (Jan. 27, Toshihiko Ikemura, Hirohisa Sato). It stays 13 mag until spring. It stays observable in good condition for a while after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  15 38.70    5 13.2   4.506   4.732    97   12.9   5:18 (345, 59)  
Feb. 25  15 41.22    6 23.9   4.434   4.757   103   12.9   5:11 (353, 61)

* 71P/Clark

It brightens up to 13 mag in winter. But the condition is bad. Appearing in the morning sky in the Southern Hemisphere. It is not observable until May in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  20 15.60  -24 19.4   2.407   1.608    28   13.1   5:18 (297, -4)  
Feb. 25  20 37.59  -23 28.2   2.395   1.620    30   13.1   5:11 (296, -4)

* C/2022 P1 ( NEOWISE )

Now it is bright as 11.4 mag (Dec. 14, Jose Guilherme de S. Aguiar). It will be fading after this. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became 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)  
Feb. 18  19 20.22  -39 12.4   2.467   1.905    45   13.4   5:18 (316, -4)  
Feb. 25  19 16.38  -39 44.5   2.389   1.954    52   13.6   5:11 (320, -1)

* 118P/Shoemaker-Levy 4

Now it is 13.3 mag (Feb. 15, 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)  
Feb. 18   8 23.67   17 16.6   1.025   1.967   155   13.5  22:31 (  0, 72)  
Feb. 25   8 22.96   18 21.1   1.080   1.989   147   13.7  22:03 (  0, 73)

* 29P/Schwassmann-Wachmann 1

It brightened in major outburst in late November. Now it is still bright as 11.6 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   6 17.61   28 45.9   5.452   6.072   124   13.6  20:26 (  0, 84)  
Feb. 25   6 16.79   28 36.4   5.550   6.075   117   13.6  19:58 (  0, 84)

* 237P/LINEAR

Now it is 15.4 mag (Feb. 12, ATLAS Chile). It will brighten very rapidly. It is expected to be observable at 11 mag in excellent condition from spring to summer. It is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  17 23.69  -25 17.7   2.280   2.101    66   14.0   5:18 (327, 22)  
Feb. 25  17 39.34  -24 55.7   2.194   2.084    70   13.6   5:11 (328, 22)

* C/2021 Y1 ( ATLAS )

Now it is 13.8 mag (Feb. 15, Toshihiko Ikemura, Hirohisa Sato). The brightness evolution is slower than originally predicted. It stays 14 mag until summer. In the Northern Hemisphere, it will too low to observe in late March. In the Southern Hemisphere, it stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   3 18.57  -14 59.0   2.222   2.207    76   13.6  19:09 ( 30, 34)  
Feb. 25   3 22.17  -15 55.9   2.283   2.176    71   13.7  19:15 ( 37, 30)

* C/2022 S3 ( PanSTARRS )

Tiny comet, but it approached to Sun down to 0.8 a.u. in January, and it will approach 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 until early March. It has not been observed since late October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   1 59.56  -64 29.7   0.774   0.979    66   13.9  19:09 ( 18,-15)  
Feb. 25   3 40.43  -59  8.7   0.674   1.049    75   13.9  19:15 ( 14, -6)

* C/2021 T4 ( Lemmon )

Now it is 15.6 mag (Feb. 8, A. Diepvens). It is expected to brighten up to 8 mag in July. It will be unobservable soon. 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)  
Feb. 18   0 21.73  -12 29.9   3.387   2.623    33   14.3  19:09 ( 68,  9)  
Feb. 25   0 22.40  -12 11.9   3.389   2.554    27   14.2  19:15 ( 73,  3)

* C/2021 X1 ( Maury-Attard )

Now it is 14.1 mag (Feb. 15, Toshihiko Ikemura, Hirohisa Sato). It stays 14 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from April to May. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   2 41.62  -12 13.7   3.614   3.367    67   14.6  19:09 ( 42, 33)  
Feb. 25   2 38.38  -10 49.0   3.716   3.349    60   14.6  19:15 ( 51, 28)

* 77P/Longmore

Now it is 14.9 mag (Feb. 10, ATLAS South Africa). It will brighten rapidly up to 14 mag and 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)  
Feb. 18  14 31.12  -16 23.3   1.866   2.367   108   14.7   4:42 (  0, 39)  
Feb. 25  14 34.01  -17 57.0   1.780   2.362   113   14.6   4:17 (  0, 37)

* C/2021 S3 ( PanSTARRS )

Now it is 14.9 mag (Feb. 9, 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. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   5 14.47  -35 30.8   4.397   4.623    97   14.9  19:22 (  0, 20)  
Feb. 25   5 13.38  -34 38.2   4.390   4.556    93   14.8  19:15 (  5, 20)

* C/2021 G2 ( ATLAS )

Now it is 15.5 mag (Feb. 13, ATLAS Chile). 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)  
Feb. 18   8 53.75  -39  4.2   5.927   6.563   126   15.0  23:01 (  0, 16)  
Feb. 25   8 51.05  -38 41.7   5.891   6.530   126   14.9  22:31 (  0, 16)

* C/2020 R7 ( ATLAS )

Now it is 15.6 mag (Feb. 8, A. Diepvens). The brightness evolution is slower than originally expected. It stays 14-15 mag for a long time. It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  18  7.43   -1 50.5   3.723   3.329    59   15.0   5:18 (302, 34)  
Feb. 25  18  8.81    0  4.9   3.644   3.361    65   15.0   5:11 (304, 39)

* 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 15.7 mag (Feb. 15, Toshihiko Ikemura, Hirohisa Sato). In the Southen 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)  
Feb. 18   7  0.66  -26 52.8   2.862   3.477   121   15.1  21:08 (  0, 28)  
Feb. 25   6 53.71  -24  2.8   2.974   3.541   117   15.3  20:33 (  0, 31)

* 117P/Helin-Roman-Alu 1

Now it is 14.8 mag (Dec. 8, ATLAS Chile). Now it is not observable. It will become observable again in late March in the Southern Hemisphere, or in late May in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  22  7.35  -18 41.1   4.211   3.232     6   15.3  19:09 ( 82,-21)  
Feb. 25  22 17.74  -17 45.5   4.218   3.243     8   15.3   5:11 (278,-20)

* C/2020 S4 ( PanSTARRS )

Now it is 14.6 mag (Feb. 15, Toshihiko Ikemura, Hirohisa Sato). It stays 15-16 mag and observable in good condition until spring. It is brighter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   9 26.20   26 42.5   2.414   3.371   162   15.8  23:34 (  0, 82)  
Feb. 25   9 24.06   27 28.9   2.444   3.373   156   15.9  23:04 (  0, 82)

* C/2022 E2 ( ATLAS )

Now it is 15.6 mag (Feb. 10, ATLAS South Africa). 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)  
Feb. 18   9 45.83  -16 43.7   5.217   6.101   151   15.9  23:53 (  0, 38)  
Feb. 25   9 39.26  -15 47.1   5.167   6.057   151   15.9  23:19 (  0, 39)

* 119P/Parker-Hartley

Now it is 14.7 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and it will be fainter than 18 mag in spring. It is observable in good condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere. It is brighter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   7 26.53   25 26.1   1.823   2.662   140   16.0  21:34 (  0, 80)  
Feb. 25   7 25.70   25 38.3   1.906   2.684   133   16.1  21:06 (  0, 81)

* C/2022 L2 ( ATLAS )

Now it is 17.4 mag (Feb. 8, A. Diepvens). It is expected to brighten up to 11.5 mag in 2024 spring. It stays observable in good condition for a long time. Appearing in the morning sky also in the Southern Hemisphere. 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)  
Feb. 18  18 35.04   15 13.1   5.122   4.678    58   16.2   5:18 (280, 40)  
Feb. 25  18 36.37   15 36.0   4.990   4.627    63   16.1   5:11 (282, 44)

* C/2021 C5 ( PanSTARRS )

It was predicted to brighten up to 16 mag in 2023. But actually, it is very faint as 18.2 mag (Feb. 7, J.-C. Merlin, D. De Martin). 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)  
Feb. 18  17  6.95  -71  6.1   3.379   3.243    73   16.3   5:18 (350,-18)  
Feb. 25  17 34.06  -72  6.6   3.335   3.245    76   16.2   5:11 (350,-19)

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 16.2 mag (Feb. 11, ATLAS Chile). 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)  
Feb. 18   9 23.67   -5  2.9   3.249   4.193   160   16.3  23:30 (  0, 50)  
Feb. 25   9 13.91   -5 36.8   3.243   4.165   155   16.3  22:53 (  0, 49)

* C/2020 Y2 ( ATLAS )

Now it is 15.6 mag (Jan. 29, ATLAS Chile). It was expected to brighten up to 13 mag in 2022 spring. But actually, it was fainter than originally expected. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from April to May. In the Northern Hemisphere, it will be unobservable in March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   2 13.67  -24 52.8   4.300   3.905    60   16.3  19:09 ( 40, 18)  
Feb. 25   2 14.86  -22 57.2   4.423   3.943    55   16.4  19:15 ( 47, 15)

* C/2018 U1 ( Lemmon )

It was observed at 15 mag from 2021 to 2022. Now it is fading. Now it is 16.3 mag (Feb. 11, J.-C. Merlin, D. De Martin). In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  15  8.58  -67 57.2   6.159   6.135    84   16.3   5:18 (  0,-13)  
Feb. 25  15  1.22  -69 11.2   6.105   6.165    88   16.3   4:45 (  0,-14)

* 263P/Gibbs

Now it is 16.4 mag (Feb. 11, Giuseppe Pappa). It is observable at 16.5 mag in good condition from January to March. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  13 11.56   29 23.9   0.353   1.256   133   16.3   3:22 (  0, 84)  
Feb. 25  13 24.07   30 24.1   0.365   1.273   134   16.4   3:07 (  0, 85)

* 204P/LINEAR-NEAT

It brightened rapidly. Now it is 16.2 mag (Jan. 29, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16 mag in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  10  4.70   20 30.5   1.024   2.006   171   16.4   0:16 (  0, 75)  
Feb. 25  10  0.40   21 13.6   1.056   2.031   166   16.5  23:40 (  0, 76)

* P/2023 B1 ( PanSTARRS )

Now it is 16.2 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). It moves along an almost circular orbit. It seems to be bright temporarily in outburst. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  10 57.72   24 54.6   5.194   6.141   161   16.5   1:09 (  0, 80)  
Feb. 25  10 54.70   25 16.3   5.186   6.140   163   16.5   0:39 (  0, 80)

* 94P/Russell 4

Now it is 16.8 mag (Feb. 10, ATLAS Chile). 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)  
Feb. 18   8 18.50   28 50.5   1.406   2.316   150   16.5  22:26 (  0, 84)  
Feb. 25   8 15.17   28 57.1   1.436   2.303   142   16.5  21:55 (  0, 84)

* 199P/Shoemaker 4

Appearing in the morning sky. It stays observable at 14-15 mag from spring to autumn. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  17 35.11  -12 58.7   3.432   3.150    65   16.6   5:18 (317, 31)  
Feb. 25  17 43.61  -13 18.7   3.326   3.132    70   16.5   5:11 (320, 32)

* 116P/Wild 4

It brightened up to 12.7 mag in last year (Feb. 27, 2022, Jose Guilherme de S. Aguiar). Now it is fading. Appearing in the morning sky. In the Southern Hemisphere, it stays observable until summer when it becomes fainter than 18 mag. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  18 37.13  -25 47.6   3.152   2.635    50   16.5   5:18 (313, 12)  
Feb. 25  18 48.80  -25 42.5   3.102   2.659    54   16.6   5:11 (315, 13)

* C/2022 W3 ( Leonard )

Now it is 16.8 mag (Feb. 11, Giuseppe Pappa). It will brighten up to 13 mag in summer. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   6 13.43   79 50.9   1.715   2.218   107   16.6  20:17 (180, 45)  
Feb. 25   4 37.33   78 48.2   1.751   2.149    99   16.5  19:15 (176, 46)

* 61P/Shajn-Schaldach

It brightened up to 14.6 mag in autumn (Oct. 19, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 17.6 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   2 46.42   10  0.6   2.377   2.303    73   16.6  19:09 ( 59, 51)  
Feb. 25   2 57.99   11  2.7   2.474   2.323    69   16.7  19:15 ( 66, 47)

* 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 16.3 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in excellent condition for a while. In the Southern Hemisphere, it will be unobservable soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   2 52.57   32 46.4   2.551   2.604    82   16.7  19:09 ( 95, 64)  
Feb. 25   3  3.40   33 29.9   2.655   2.627    77   16.8  19:15 ( 98, 59)

* 408P/2020 M7 ( Novichonok-Gerke )

Now it is 16.5 mag (Feb. 8, ATLAS Chile). It is 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)  
Feb. 18   4  9.97    1 37.3   3.354   3.528    91   16.8  19:09 ( 22, 55)  
Feb. 25   4 14.24    2 14.6   3.455   3.534    86   16.9  19:15 ( 34, 52)

* C/2019 E3 ( ATLAS )

Now it is 16.6 mag (Feb. 9, ATLAS Chile). Very far object. It stays 16-17 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)  
Feb. 18   5 17.97  -74 32.2  10.482  10.414    83   16.9  19:24 (  0,-19)  
Feb. 25   5 10.71  -73 55.0  10.470  10.409    83   16.9  19:15 (  2,-19)

* C/2020 F2 ( ATLAS )

Now it is 17.0 mag (Feb. 13, ATLAS South Africa). It stays 17 mag and observable in good condition until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  13 23.63    7 45.2   8.232   8.907   130   17.1   3:34 (  0, 63)  
Feb. 25  13 20.23    8 20.8   8.152   8.913   138   17.1   3:04 (  0, 63)

* C/2023 A1 ( Leonard )

Now it is 16.7 mag (Feb. 11, R. Naves, M. Campas). In the Northern Hemisphere, it stays observable at 17 mag in excellent condition from February to March. In the Southern Hemisphere, it is not observable until late March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  12 40.41   73 53.0   1.235   1.870   114   17.2   2:55 (180, 51)  
Feb. 25  10 34.82   73 28.8   1.195   1.855   115   17.1   0:25 (180, 51)

* 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 17.3 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). 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)  
Feb. 18  10  8.80   28 29.1   3.651   4.606   163   17.1   0:20 (  0, 83)  
Feb. 25  10  5.07   29 12.4   3.686   4.625   159   17.1  23:45 (  0, 84)

* 364P/PanSTARRS

Now it is 18.0 mag (Feb. 13, ATLAS South Africa). It will brighten very rapidly up to 11.5 mag in April. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable from mid April to mid June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  13 18.01   20 40.5   0.623   1.483   132   17.6   3:28 (  0, 76)  
Feb. 25  13 31.94   21 58.2   0.524   1.409   134   17.1   3:15 (  0, 77)

* C/2023 B2 ( ATLAS )

Now it is 17.2 mag (Feb. 8, J.-C. Merlin, D. De Martin). It brightens up to 16.5 mag from March to April. In the Southern Hemisphere, it stays observable in excellent condition. In the Northern Hemisphere, it is not observable until the end of March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  11 17.03  -56 47.6   1.165   1.763   109   17.3   1:28 (  0, -2)  
Feb. 25  11 24.68  -56 33.4   1.108   1.752   113   17.2   1:08 (  0, -2)

* C/2020 H6 ( ATLAS )

Now it is 17.2 mag (Feb. 12, Catalina Sky Survey). 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)  
Feb. 18  18 18.41   46 50.2   6.255   6.113    77   17.3   5:18 (237, 53)  
Feb. 25  18 24.61   48  1.2   6.262   6.147    78   17.3   5:11 (234, 55)

* 280P/Larsen

It has not been observed yet in this apparition. In the last apparition, it had faded before the perihelion passage. If it becomes as bright as its last apparition, it will brighten up to 17 mag. It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  14 10.57    0 43.6   2.274   2.870   117   17.4   4:21 (  0, 56)  
Feb. 25  14 13.47    1 12.4   2.180   2.853   123   17.3   3:56 (  0, 56)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Now it is 17.8 mag (Feb. 1, 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)  
Feb. 18   2 29.93  -58 54.9  18.326  17.976    67   17.4  19:09 ( 19, -9)  
Feb. 25   2 31.32  -58 38.7  18.318  17.951    66   17.4  19:15 ( 22,-11)

* C/2019 O3 ( Palomar )

Now it is 17.4 mag (Jan. 29, 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)  
Feb. 18  18 25.48   68 16.8   9.691   9.723    88   17.4   5:18 (204, 47)  
Feb. 25  18 28.53   69  9.4   9.710   9.740    88   17.4   5:11 (202, 48)

* 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 (Jan. 24, ATLAS-HKO, Haleakala). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   6 10.21   10  7.8   4.006   4.617   122   17.4  20:18 (  0, 65)  
Feb. 25   6 10.25   10 20.6   4.117   4.638   116   17.5  19:51 (  0, 65)

* 244P/Scotti

Now it is 17.2 mag (Jan. 27, J. L. Virlichie, P. Traverse, H. Roy, G. Houdin). 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)  
Feb. 18   5 47.61   25 56.9   3.369   3.937   118   17.5  19:56 (  0, 81)  
Feb. 25   5 48.53   25 52.2   3.466   3.939   111   17.6  19:29 (  0, 81)

* C/2021 S4 ( Tsuchinshan )

Now it is 17.4 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). 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)  
Feb. 18   2 30.62   28  9.2   7.176   7.002    75   17.6  19:09 ( 89, 58)  
Feb. 25   2 33.94   28 18.6   7.268   6.988    69   17.6  19:15 ( 93, 51)

* 300P/Catalina

It will approach to Sun down to 0.8 a.u. in April, and it will brighten up to 15 mag. In the Southern Hemisphere, it stays observable in the extremely low sky. In the Northern Hemisphere, it is not observable after March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  19  5.16  -20 46.1   1.631   1.140    43   18.4   5:18 (305, 11)  
Feb. 25  19 40.36  -20  3.5   1.576   1.076    42   17.7   5:11 (302,  9)

* 211P/Hill

Now it is 17.9 mag (Jan. 27, Purple Mountain Observatory, XuYi Station). 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)  
Feb. 18  12  0.87   23 30.6   1.586   2.491   149   17.7   2:12 (  0, 78)  
Feb. 25  11 57.77   24 56.4   1.579   2.506   154   17.8   1:41 (  0, 80)

* C/2022 W2 ( ATLAS )

Now it is 18 mag (Feb. 11, Giuseppe Pappa). It stays 17.5 mag until spring. It is observable in good condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   2  6.62   78 49.8   2.861   3.128    96   17.7  19:09 (170, 43)  
Feb. 25   2 56.59   77 24.7   2.892   3.125    94   17.8  19:15 (169, 44)

* 452P/2022 B5 ( Sheppard-Jewitt )

Now it is 18.6 mag (Jan. 21, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 18 mag in good condition from January to March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  10 22.76   14 19.6   3.209   4.194   174   17.8   0:34 (  0, 69)  
Feb. 25  10 19.38   14 46.8   3.205   4.191   173   17.8   0:03 (  0, 70)

* P/2021 V2 ( Fuls )

Now it is 17.5 mag (Feb. 15, 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)  
Feb. 18   8 41.28    0 20.0   2.574   3.502   156   17.8  22:49 (  0, 55)  
Feb. 25   8 38.64    0 42.6   2.608   3.505   150   17.8  22:19 (  0, 56)

* C/2022 U4 ( Bok )

Now it is 17.5 mag (Feb. 11, J. Vilagi). In the Northern Hemisphere, it stays observable at 17.5 mag in good condition from spring to summer. In the Southern Hemisphere, it locates extremely low only in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  13 13.84   43 26.9   2.636   3.341   128   17.8   3:24 (180, 82)  
Feb. 25  13 16.02   45 34.5   2.590   3.308   129   17.8   2:59 (180, 80)

* 99P/Kowal 1

It brightened up to 15.9 mag in 2022 spring (May 5, Toshiyuki Takahashi). In 2023, it is observable at 17.5 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18  16 20.34  -23 28.9   4.896   4.849    81   17.9   5:18 (341, 29)  
Feb. 25  16 23.84  -23 42.6   4.793   4.855    87   17.8   5:11 (345, 30)

* 65P/Gunn

Now it is 18.0 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15 mag from 2024 to 2025. In 2023, it is observable at 18 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Feb. 18   9 50.01   25 29.0   3.427   4.392   166   17.9   0:02 (  0, 80)  
Feb. 25   9 45.24   25 49.8   3.436   4.381   160   17.9  23:25 (  0, 81)

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