Weekly Information about Bright Comets (2023 Apr. 8: North)

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 Updated on April 11, 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/2017 K2 ( PanSTARRS )

Now it is very bright as 8.9 mag (Mar. 15, 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)  
Apr.  8   3 58.95  -35 37.1   2.608   2.261    58    8.7  19:53 ( 53, -9)  
Apr. 15   4 12.83  -32 12.0   2.704   2.313    56    8.9  20:00 ( 58,-10)

* C/2020 V2 ( ZTF )

Now it is 10.7 mag (Mar. 28, Osamu Miyazaki). It stays bright as 10 mag for a long time until autumn. In the Northern Hemisphere, it becomes unobservable temporarily in early April. But it becomes observable again in summer. In the Southern Hemipshere, it stays unobservable until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   2 16.06   30 39.1   3.078   2.256    29   10.0  19:53 (121, 10)  
Apr. 15   2 21.62   29 12.6   3.133   2.244    23   10.0  20:00 (124,  4)

* C/2020 K1 ( PanSTARRS )

Now it is 13.1 mag (Mar. 30, Chris Wyatt). It was expected to brighten up to 10 mag from spring to summer. However, it is fainter than expected recently. In the Southern Hemisphere, it stays observable in good condition for a long time. 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)  
Apr.  8  20 16.90  -46 48.5   3.047   3.088    82   10.8   4:11 (330, -2)  
Apr. 15  20 24.75  -49 26.9   2.940   3.082    88   10.7   4:00 (333, -3)

* C/2022 A2 ( PanSTARRS )

It brightened very rapidly. Now it is very bright as 11.0 mag (Mar. 31, Osamu Miyazaki). It will be fading gradually after this. 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)  
Apr.  8   0  1.03   42 41.0   2.523   1.847    38   10.8   4:11 (228, 15)  
Apr. 15   0 11.65   41 37.5   2.588   1.880    36   11.0   4:00 (230, 16)

* 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. It has already faded down to 10.9 mag (Mar. 28, Osamu Miyazaki). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it is observable only until mid April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   4 57.10   -8 40.6   2.000   1.730    59   10.9  19:53 ( 65, 18)  
Apr. 15   5  2.13   -9 35.4   2.167   1.809    55   11.3  20:00 ( 69, 12)

* 364P/PanSTARRS

Now it is 12.7 mag (Apr. 3, Ken-ichi Kadota). It brightens 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)  
Apr.  8  19 41.92   24 10.0   0.121   0.985    78   11.7   4:11 (279, 57)  
Apr. 15  21 48.41    8 39.8   0.146   0.926    54   11.5   4:00 (278, 27)

* 237P/LINEAR

Now it is 13.3 mag (Mar. 28, Ken-ichi Kadota). 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)  
Apr.  8  19  3.20  -19 47.8   1.695   2.009    92   11.9   4:11 (330, 29)  
Apr. 15  19 14.60  -18 29.6   1.618   2.001    96   11.6   4:00 (331, 31)

* C/2019 U5 ( PanSTARRS )

Now it is 11.4 mag (Mar. 31, 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)  
Apr.  8  11 36.08   -1 55.8   2.681   3.625   157   11.8  22:29 (  0, 53)  
Apr. 15  11 22.35   -2 13.3   2.742   3.627   147   11.8  21:48 (  0, 53)

* 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 12.2 mag still now (Mar. 30, 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)  
Apr.  8   9  2.23  -33 12.6   4.781   5.328   118   12.4  19:57 (  0, 22)  
Apr. 15   9  1.78  -32 42.7   4.880   5.370   114   12.5  20:00 (  7, 22)

* 81P/Wild 2

Now it is 12.6 mag (Mar. 21, Osamu Miyazaki). It stays 12 mag until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  17 45.63  -18 48.4   1.338   1.936   110   12.4   4:11 (351, 36)  
Apr. 15  17 49.57  -18 40.6   1.305   1.972   116   12.5   4:00 (354, 36)

* C/2019 T4 ( ATLAS )

Now it is bright as 13.2 mag (Mar. 31, Osamu Miyazaki). 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)  
Apr.  8  15 42.33   14 15.8   4.154   4.919   135   13.0   2:40 (  0, 69)  
Apr. 15  15 40.35   15 31.6   4.144   4.948   139   13.1   2:11 (  0, 70)

* C/2021 T4 ( Lemmon )

It brightened up to 14.5 mag in February (Feb. 16, Ken-ichi Kadota). It is expected to brighten up to 8 mag in July. Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky at 13 mag in mid April, and it will be observable in excellent condition at the high light. In the Northern Hemisphere, it is not observable until June, and it becomes very low at the high lihght. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   0 33.09  -10 49.6   3.069   2.150    19   13.3   4:11 (268,-22)  
Apr. 15   0 35.32  -10 45.7   2.958   2.086    24   13.0   4:00 (270,-19)

* 71P/Clark

Now it is 13.2 mag (Mar. 30, Chris Wyatt). The condition is bad in this apparition. 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)  
Apr.  8  22 34.75  -16 10.4   2.320   1.740    43   13.4   4:11 (289, -1)  
Apr. 15  22 51.66  -14 48.3   2.305   1.767    46   13.4   4:00 (288, -1)

* C/2021 Y1 ( ATLAS )

Now it is 14.6 mag (Mar. 18, Chris Wyatt). The brightness evolution is slower than originally predicted. It stays 14 mag until summer. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until 2024 spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   4  5.52  -20 56.9   2.503   2.051    52   13.7  19:53 ( 63,  1)  
Apr. 15   4 15.99  -21 53.0   2.513   2.041    51   13.7  20:00 ( 66, -4)

* 29P/Schwassmann-Wachmann 1

Now it is 13.0 mag (Mar. 25, iTelescope Observatory, Beryl Junction). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   6 24.58   27 36.5   6.218   6.088    77   13.9  19:53 ( 88, 57)  
Apr. 15   6 27.74   27 26.3   6.329   6.090    71   13.9  20:00 ( 92, 50)

* 77P/Longmore

Now it is 14.4 mag (Mar. 30, Chris Wyatt). It will brighten rapidly up to 14 mag and will be observable in excellent condition in spring. In the Northern Hemisphere, it was 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)  
Apr.  8  14 19.55  -27  4.2   1.412   2.349   153   14.0   1:18 (  0, 28)  
Apr. 15  14 11.92  -28 18.8   1.387   2.350   158   14.0   0:43 (  0, 27)

* C/2023 A2 ( SWAN )

It brightened up to 11 mag in SWAN images in January (Jan. 23, Vladimir Bezugly). Now it is fading. It has already faded down to 15.6 mag (Mar. 25, M. Masek). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  22 31.09  -52 13.8   1.699   1.610    67   14.2   4:11 (320,-21)  
Apr. 15  23  3.01  -56 27.8   1.701   1.697    72   14.5   4:00 (323,-25)

* C/2021 S3 ( PanSTARRS )

Now it is 14.4 mag (Apr. 2, 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)  
Apr.  8   5 25.26  -28 59.2   4.344   4.148    72   14.4  19:53 ( 45,  9)  
Apr. 15   5 30.00  -28  7.4   4.330   4.078    68   14.3  20:00 ( 51,  5)

* C/2021 X1 ( Maury-Attard )

Now it is 14.9 mag (Mar. 19, Masayoshi Yoshimi). It stays 14 mag in 2023. It is not observable now. Then it is not observable until May in the Southern Hemisphere, or until June in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   2 34.50   -3 34.0   4.151   3.268    24   14.7  19:53 ( 91, -7)  
Apr. 15   2 35.39   -2 33.3   4.183   3.259    20   14.7  20:00 ( 96,-13)

* C/2020 S4 ( PanSTARRS )

Now it is 14.7 mag (Mar. 27, W. Pei). It stays 14.5 mag and observable in good condition until spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   9 25.44   29 25.5   2.853   3.413   116   14.8  20:21 (  0, 84)  
Apr. 15   9 28.66   29 19.3   2.948   3.424   110   14.9  20:00 (  8, 84)

* C/2022 P1 ( NEOWISE )

It brightened up to 9.7 mag in autumn (Oct. 23, Marco Goiato). Now it is fading. It has already faded down to 12.9 mag (Mar. 14, Thomas Lehmann). 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)  
Apr.  8  17 59.02  -44 50.6   1.786   2.282   106   15.0   4:11 (352,  9)  
Apr. 15  17 30.66  -45 21.2   1.701   2.341   117   15.2   4:00 (  0, 10)

* 118P/Shoemaker-Levy 4

Now it is 13.9 mag (Mar. 27, W. Pei). It will be fading after this. It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   8 48.45   20 58.6   1.566   2.142   111   15.1  19:53 (  8, 76)  
Apr. 15   8 56.57   20 51.0   1.666   2.171   106   15.4  20:00 ( 31, 74)

* 300P/Catalina

Now it is 15.4 mag (Apr. 2, E. Cortes, B. Lutkenhoner). It will be fading after this, and it will be fainter than 18 mag in May. In the Southern Hemisphere, it stays observable in the extremely low sky. In the Northern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  23 21.39   -6 10.7   1.554   0.834    28   15.1   4:11 (274, -5)  
Apr. 15  23 55.38   -2 57.3   1.597   0.834    26   15.2   4:00 (269, -7)

* C/2021 G2 ( ATLAS )

Now it is 15.6 mag (Mar. 29, Thomas Lehmann). 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)  
Apr.  8   8 43.93  -34 41.7   5.862   6.339   114   15.2  19:53 (  3, 20)  
Apr. 15   8 44.72  -33 52.9   5.884   6.308   110   15.1  20:00 ( 11, 20)

* C/2022 L2 ( ATLAS )

Now it is 16.1 mag (Mar. 26, D. Buczynski). It is expected to brighten up to 11.5 mag in 2024 spring. It stays observable in good condition for a long time. 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)  
Apr.  8  18 29.98   19 11.4   4.103   4.322    95   15.4   4:11 (308, 67)  
Apr. 15  18 25.55   19 55.3   3.953   4.272   101   15.3   4:00 (317, 71)

* C/2022 E2 ( ATLAS )

Now it is 15.1 mag (Mar. 31, Masayoshi Yoshimi). It is expected to brighten up to 12 mag from 2024 to 2025. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   9  6.33   -8 49.0   5.219   5.798   120   15.3  20:01 (  0, 46)  
Apr. 15   9  2.77   -7 38.1   5.275   5.755   113   15.3  20:00 ( 11, 47)

* C/2020 R7 ( ATLAS )

It brightened up to 13.4 mag in last summer (July 7, Giuseppe Pappa). Now it is fading. It has already faded down to 15.9 mag (Mar. 28, P.-J. Dekelver). It stays 15-16 mag until summer. It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  17 57.57   14  8.0   3.187   3.571   104   15.4   4:11 (332, 67)  
Apr. 15  17 51.58   16 46.0   3.135   3.609   110   15.4   4:00 (344, 71)

* 117P/Helin-Roman-Alu 1

Now it is 14.8 mag (Dec. 8, ATLAS Chile). In the Southern Hemisphere, apperaing in the morning sky. In the Northern Hemisphere, it will become observable in late May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  23 16.15  -12 17.0   4.109   3.316    33   15.4   4:11 (280, -7)  
Apr. 15  23 25.09  -11 25.8   4.067   3.329    37   15.4   4:00 (280, -5)

* 126P/IRAS

Now it is 16.8 mag (Mar. 28, E. Cortes, B. Lutkenhoner). It will brighten rapidly up to 13.5 mag in summer. In the Southern Hemisphere, it stays observable until August. In the Northern Hemisphere, it is not observable until June. But it stays observable in good condition after that. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  23 29.58  -30 24.1   2.555   1.958    43   15.6   4:11 (294,-20)  
Apr. 15  23 43.78  -27 42.3   2.492   1.923    45   15.4   4:00 (292,-18)

* 199P/Shoemaker 4

Now it is 16.5 mag (Mar. 18, J.-C. Merlin). 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)  
Apr.  8  18 23.93  -15 15.7   2.672   3.036   101   15.7   4:11 (339, 37)  
Apr. 15  18 28.24  -15 40.7   2.566   3.023   107   15.6   4:00 (342, 38)

* C/2022 U2 ( ATLAS )

It brightened very rapidly up to 9.6 mag in late January (Jan. 25, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 14.1 mag (Mar. 19, Ken-ichi Kadota). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   7  5.05   -3 56.0   1.479   1.793    90   15.7  19:53 ( 40, 43)  
Apr. 15   7 16.30   -5 44.4   1.610   1.858    87   16.3  20:00 ( 45, 38)

* C/2022 W3 ( Leonard )

Now it is 16.8 mag (Mar. 28, Thomas Lehmann). 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)  
Apr.  8   2 16.87   66 17.4   2.023   1.764    60   16.0  19:53 (153, 28)  
Apr. 15   2 13.58   65  9.8   2.048   1.707    56   15.9  20:00 (154, 24)

* C/2023 E1 ( ATLAS )

Now it is 16.9 mag (Mar. 31, Ken-ichi Kadota). It will brighten up to 13 mag from June to August. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it becomes unobservable from late April to early August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  12 36.27   37 23.8   0.800   1.667   135   16.2  23:30 (180, 87)  
Apr. 15  12 30.15   43  4.5   0.779   1.589   125   16.0  22:56 (180, 82)

* 119P/Parker-Hartley

It continued brightening even after the perihelion passage. Now it is 16.1 mag (Mar. 19, Ken-ichi Kadota). It will be fading after this, and it will be fainter than 18 mag in July. It is observable in good 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)  
Apr.  8   7 46.28   25 24.1   2.532   2.823    96   16.0  19:53 ( 63, 72)  
Apr. 15   7 53.01   25  9.3   2.648   2.847    90   16.1  20:00 ( 72, 66)

* 96P/Machholz 1

It approached to Sun down to 0.1 a.u. on Jan. 31. 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 13.2 mag (Mar. 24, Thomas Lehmann). 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)  
Apr.  8  20 18.82   -8 48.6   1.564   1.591    72   16.1   4:11 (306, 28)  
Apr. 15  20 15.95   -9 15.6   1.547   1.699    80   16.4   4:00 (310, 31)

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 16.0 mag (Mar. 31, Ken-ichi Kadota). 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)  
Apr.  8   8 29.25   -7 46.3   3.531   4.011   111   16.3  19:53 ( 10, 47)  
Apr. 15   8 25.25   -8  2.9   3.613   3.988   104   16.3  20:00 ( 24, 44)

* C/2018 U1 ( Lemmon )

It was observed at 15 mag from 2021 to 2022. Now it is fading. Now it is 17.4 mag (Apr. 3, ATLAS South Africa). 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)  
Apr.  8  13 20.34  -73 51.2   5.890   6.349   113   16.4   0:20 (  0,-19)  
Apr. 15  12 57.03  -73 48.8   5.884   6.380   115   16.4  23:22 (  0,-19)

* C/2021 E3 ( ZTF )

It brightened up to 9.3 mag in early summer in 2022 (June 5, Chris Wyatt). Now it is fading. It has already faded down to 16.6 mag (Mar. 31, ATLAS South Africa). 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)  
Apr.  8   6 41.93  -10 11.7   3.871   3.924    85   16.5  19:53 ( 42, 35)  
Apr. 15   6 43.40   -8 31.5   4.039   3.987    79   16.6  20:00 ( 51, 31)

* 94P/Russell 4

Now it is 16.9 mag (Mar. 19, Toshihiko Ikemura, Hirohisa Sato). 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)  
Apr.  8   8 27.95   27  0.9   1.769   2.247   105   16.5  19:53 ( 40, 80)  
Apr. 15   8 35.02   26 21.3   1.839   2.241    99   16.6  20:00 ( 58, 75)

* P/2023 B1 ( PanSTARRS )

Now it is 17.1 mag (Mar. 29, Masayoshi Yoshimi). 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)  
Apr.  8  10 38.36   26 10.9   5.433   6.141   131   16.6  21:33 (  0, 81)  
Apr. 15  10 36.79   26  5.5   5.513   6.141   124   16.6  21:04 (  0, 81)

* C/2023 B2 ( ATLAS )

Now it is 15.6 mag (Apr. 2, ATLAS South Africa). It brightens up to 16 mag from March to April. In the Southern Hemisphere, it stays observable in excellent condition. In the Northern Hemisphere, it will be getting higher gradually after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  12  3.98  -39 32.5   0.869   1.782   144   16.7  22:59 (  0, 16)  
Apr. 15  12 10.65  -34 11.0   0.866   1.803   149   16.7  22:38 (  0, 21)

* C/2019 E3 ( ATLAS )

Now it is 16.7 mag (Mar. 29, 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)  
Apr.  8   4 55.95  -70  3.3  10.400  10.381    86   16.8  19:53 ( 19,-24)  
Apr. 15   4 56.91  -69 30.0  10.389  10.377    86   16.8  20:00 ( 21,-26)

* 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. It has already faded down to 17.1 mag (Mar. 17, J.-C. Merlin). 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)  
Apr.  8  19 44.96  -24 49.6   2.731   2.807    83   16.9   4:11 (324, 20)  
Apr. 15  19 51.48  -24 42.7   2.661   2.832    89   16.9   4:00 (326, 22)

* C/2022 U4 ( Bok )

Now it is 17.1 mag (Mar. 31, Ken-ichi Kadota). In the Northern Hemisphere, it stays observable at 17 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)  
Apr.  8  13  9.61   55  9.8   2.533   3.130   117   17.0   0:08 (180, 70)  
Apr. 15  13  6.65   55 52.7   2.552   3.104   114   16.9  23:33 (180, 69)

* C/2020 F2 ( ATLAS )

Now it is 16.5 mag (Mar. 31, 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)  
Apr.  8  12 54.33   11 52.7   7.999   8.952   161   17.1  23:48 (  0, 67)  
Apr. 15  12 49.70   12 22.3   8.034   8.959   155   17.1  23:16 (  0, 67)

* 263P/Gibbs

Now it is 16.7 mag (Mar. 29, Masayoshi Yoshimi). It will be fading after this, and it will be fainter than 18 mag in early May. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  13 28.29   27 30.6   0.525   1.463   145   17.1   0:26 (  0, 82)  
Apr. 15  13 24.74   25 37.2   0.570   1.505   144   17.3  23:51 (  0, 80)

* C/2023 A1 ( Leonard )

Now it is 15.8 mag (Mar. 19, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and it will be fainter than 18 mag in early May. 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)  
Apr.  8   7 15.19   33 26.8   1.588   1.853    88   17.2  19:53 ( 92, 69)  
Apr. 15   7 14.77   28 30.5   1.719   1.867    82   17.4  20:00 ( 87, 60)

* 180P/NEAT

Now it is 16.8 mag (Mar. 19, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag from spring to early summer. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   9 12.21   36 48.5   2.050   2.574   110   17.2  20:08 (180, 88)  
Apr. 15   9 15.89   36  4.3   2.117   2.564   104   17.2  20:00 (107, 87)

* C/2023 A3 ( Tsuchinshan-ATLAS )

It will approach to Sun down to 0.4 a.u. in late September in 2024, and it is expected to brighten up to 0 mag. Now it is 17.3 mag (Mar. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a while. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  15  6.83    0 55.8   6.043   6.917   148   17.3   2:05 (  0, 56)  
Apr. 15  15  2.56    1 19.8   5.934   6.854   154   17.2   1:33 (  0, 56)

* C/2014 UN271 ( Bernardinelli-Bernstein )

Now it is 17.1 mag (Mar. 13, 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)  
Apr.  8   2 44.81  -57 26.9  18.160  17.801    67   17.3  19:53 ( 39,-31)  
Apr. 15   2 47.68  -57 20.9  18.116  17.776    68   17.3  20:00 ( 40,-35)

* 185P/Petriew

It has not been observed yet in this apparition. It will brighten rapidly up to 11 mag in July. It stays extremely low in this apparition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  22  1.95   -0 49.1   2.121   1.602    46   17.9   4:11 (281, 14)  
Apr. 15  22 22.63    1 12.0   2.023   1.535    47   17.4   4:00 (279, 15)

* P/2010 VH95 ( Catalina )

Now it is 17.1 mag (Apr. 3, Ken-ichi Kadota). It was regarded as an asteroid, but its cometary activity was detected. It will be fading after this, and it will be fainter than 18 mag in late April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   6 15.29   16 37.9   1.326   1.458    76   17.5  19:53 ( 73, 50)  
Apr. 15   6 39.16   16 13.0   1.384   1.486    75   17.6  20:00 ( 75, 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 17.6 mag (Mar. 30, Catalina Sky Survey). In the Northern Hemisphere, it stays observable in excellent condition for a while. In the Southern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   4 19.57   37 14.2   3.259   2.783    53   17.5  19:53 (114, 35)  
Apr. 15   4 33.57   37 41.7   3.353   2.812    49   17.6  20:00 (117, 32)

* 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 17.0 mag (Mar. 25, ATLAS-HKO, Haleakala). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   6 24.49   11 31.6   4.859   4.766    78   17.5  19:53 ( 65, 48)  
Apr. 15   6 28.78   11 39.6   4.982   4.788    73   17.6  20:00 ( 72, 42)

* C/2019 O3 ( Palomar )

Now it is 17.1 mag (Mar. 28, ATLAS-HKO, Haleakala). 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)  
Apr.  8  18 28.49   74 53.8   9.867   9.843    85   17.5   4:11 (187, 49)  
Apr. 15  18 23.76   75 50.1   9.900   9.860    84   17.6   4:00 (185, 49)

* C/2020 H6 ( ATLAS )

Now it is 17.3 mag (Mar. 10, 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)  
Apr.  8  18 50.80   55 35.8   6.336   6.350    86   17.5   4:11 (211, 64)  
Apr. 15  18 52.79   56 50.4   6.355   6.384    87   17.6   4:00 (206, 64)

* 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 17.2 mag (Mar. 15, ATLAS-HKO, Haleakala). It will be fainter than 18 mag in May. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   9 50.62   31 19.9   4.163   4.742   119   17.5  20:46 (  0, 86)  
Apr. 15   9 50.41   31 20.0   4.274   4.762   113   17.6  20:18 (  0, 86)

* 99P/Kowal 1

It brightened up to 15.9 mag in 2022 spring (May 5, Toshiyuki Takahashi). Now it is 17.4 mag (Mar. 18, J.-C. Merlin). 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)  
Apr.  8  16 30.93  -24 35.8   4.218   4.895   127   17.6   3:29 (  0, 30)  
Apr. 15  16 29.64  -24 39.5   4.143   4.902   134   17.6   3:00 (  0, 30)

* 12P/Pons-Brooks

Now it is 17.9 mag (Apr. 3, Ken-ichi Kadota). It returns for the first time in 70 years. It will brighten up to 4.5 mag in 2024 spring. In the Northern Hemisphere, it stays observable in good condition until 2024 spring while the comet will be brightening gradually. In the Southern Hemisphere, it is observable only in 2023 spring in the extremely low sky before the perihelion passage. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  19 32.83   37  3.1   4.958   4.890    80   17.8   4:11 (256, 62)  
Apr. 15  19 34.80   38 34.3   4.838   4.825    83   17.7   4:00 (253, 65)

* 287P/Christensen

It will brighten up to 16.5 mag in 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)  
Apr.  8  21 46.59  -11  2.5   3.573   3.068    52   17.9   4:11 (292, 11)  
Apr. 15  21 55.94  -10 32.5   3.491   3.063    57   17.8   4:00 (293, 13)

* 204P/LINEAR-NEAT

It brightened rapidly. Now it is 16.9 mag (Mar. 19, Ken-ichi Kadota). It will be fading after this. It will be fainter than 18 mag in April. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   9 56.72   21 26.0   1.459   2.201   125   17.9  20:52 (  0, 76)  
Apr. 15  10  0.53   20 54.0   1.553   2.232   120   18.1  20:28 (  0, 76)

* 452P/2022 B5 ( Sheppard-Jewitt )

Now it is 19.3 mag (Mar. 27, A. Diepvens). Fading rapidly. It looks elongated. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  10  5.23   16 26.8   3.467   4.179   129   17.9  21:00 (  0, 71)  
Apr. 15  10  4.94   16 28.5   3.548   4.179   122   18.0  20:32 (  0, 71)

* 244P/Scotti

Now it is 17.6 mag (Mar. 18, D. Buczynski). It will be fading after this, and it will be fainter than 18 mag in April. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   6 11.29   25 25.6   4.098   3.958    74   17.9  19:53 ( 87, 53)  
Apr. 15   6 17.37   25 19.9   4.201   3.962    69   18.0  20:00 ( 91, 47)

* 65P/Gunn

Now it is 17.9 mag (Mar. 10, A. Diepvens). 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)  
Apr.  8   9 26.61   26  8.2   3.752   4.309   117   17.9  20:22 (  0, 81)  
Apr. 15   9 26.10   25 54.6   3.836   4.297   110   18.0  20:00 (  9, 81)

* 80P/Peters-Hartley

Now it is 17.4 mag (Apr. 3, E. Cortes). It will be getting higher gradually, but it will be fading after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  21 19.43    1 25.5   2.393   2.020    56   18.0   4:11 (286, 24)  
Apr. 15  21 29.99    3 47.2   2.370   2.060    59   18.1   4:00 (285, 27)

* C/2021 C5 ( PanSTARRS )

It was predicted to brighten up to 16 mag in 2023. But actually, it is very faint as 18.1 mag (Mar. 29, ATLAS Chile). 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)  
Apr.  8  20  6.03  -75 18.1   3.080   3.285    92   18.0   4:11 (349,-24)  
Apr. 15  20 24.71  -75 34.7   3.040   3.297    95   18.0   4:00 (349,-24)

* C/2022 Q2 ( ATLAS )

It was observed at 17 mag in 2022 autumn. It was predicted to be observable at 17 mag also in 2023 spring. But actually, it is extremely faint as 19.7 mag (Apr. 1, Taras Prystavski). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  20  4.49    8 38.6   1.855   1.855    74   19.6   4:11 (294, 43)  
Apr. 15  19 50.90   11  6.6   1.732   1.897    83   19.6   4:00 (298, 50)

* 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 was expected to brighten up to 14 mag from January to March. But actually, it became disintegrated before the perihelion passage. Now it is extremely faint as 18.2 mag (Feb. 20, Thomas Lehmann). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8   7 49.72   12 26.3   1.061   1.573    99   20.9  19:53 ( 38, 63)  
Apr. 15   8  5.86   17  2.9   1.237   1.666    95   21.3  20:00 ( 53, 64)

* 280P/Larsen

In the last apparition, it had faded before the perihelion passage. It was expected to brighten up to 17 mag if it would become as bright as its last apparition. But actually, it is extremely faint as 22.2 mag (Mar. 27, Pan-STARRS 1, Haleakala). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  8  14  9.34    5 29.7   1.799   2.760   159   21.7   1:07 (  0, 60)  
Apr. 15  14  5.69    6 10.8   1.775   2.747   162   21.6   0:36 (  0, 61)

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