Weekly Information about Bright Comets (2022 Apr. 23: North)

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Updated on April 24, 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 O3 ( PanSTARRS )

It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). It was visible at 7-8 mag between Apr. 7-9 in the SWAN images. In the Southern Hemisphere, it was observable in the extremely low sky in mid April. But it was not visible, fainter than 7.6 mag (Apr. 19, Chris Wyatt). It was not detected by photo, fainter than 9.0 mag (Apr. 22, Michael Mattiazzo). It is fainter than this ephemeris. In the Northern Hemisphere, it will appear soon, 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)  
Apr. 23   3  2.39    5 55.2   0.887   0.294    16    4.4  20:09 (106,-10)  
Apr. 30   3 30.00   21  0.6   0.682   0.400    16    5.2  20:17 (119, -2)  

* 45P/Honda-Mrkos-Pajdusakova

It has not been observed yet in this apparition. It will brighten up to 9 mag in May. The condition is very bad in this apparition. It is observable only in the extremely low sky from mid May to mid July in the Northern Hemisphere, or from early June to early August in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   2 23.42   13 11.1   1.552   0.560     5    9.4  20:09 (117,-13)  
Apr. 30   3 11.43   17 18.3   1.521   0.565    10    9.2  20:17 (118, -8)  

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.3 mag (Apr. 7, Osamu Miyazaki). The brightness evolution is slower than originally expected. It is expected to be observable at 7 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 stays observable in good condition for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  18 53.90   11 47.6   3.004   3.383   103    9.9   3:47 (324, 63)  
Apr. 30  18 51.55   11 44.1   2.844   3.320   109    9.7   3:37 (334, 65)  

* C/2021 F1 ( Lemmon-PanSTARRS )

It brightened very rapidly up to 9.3 mag in March (Mar. 24, Michael Jager). Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky in late May. Then it stays observable in good condition after that. 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. 23   1 42.39   16 23.4   2.027   1.033     6    9.8   3:47 (240,-12)  
Apr. 30   1 55.78   13  5.2   2.060   1.071     7   10.2   3:37 (243,-13)  

* C/2019 L3 ( ATLAS )

Now it is 10.4 mag (Apr. 21, Marco Goiato). It will be getting lower after this. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   6 57.08   13 48.2   3.866   3.677    71   10.3  20:09 ( 77, 41)  
Apr. 30   7  2.73   12 56.5   3.978   3.694    66   10.4  20:17 ( 81, 35)  

* 22P/Kopff

Now it is 11.5 mag (Apr. 10, Thomas Lehmann). 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)  
Apr. 23  22 36.80   -9  8.9   1.939   1.595    55   11.0   3:47 (288, 10)  
Apr. 30  22 54.84   -7 39.1   1.916   1.613    57   11.1   3:37 (287, 10)  

* C/2019 T4 ( ATLAS )

Now it is bright as 11.6 mag (Apr. 22, Marco Goiato). It stays observable at 11-12 mag until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  11 45.12  -16 26.5   3.384   4.261   146   11.5  21:39 (  0, 39)  
Apr. 30  11 44.23  -14 51.5   3.430   4.256   140   11.5  21:11 (  0, 40)  

* C/2021 E3 ( ZTF )

Now it is very bright as 11.6 mag (Apr. 9, Ken Harikae). It will brighten up to 10-11 mag from spring to summer. In the Southen Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it is hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  21 18.17  -37 39.3   1.729   1.889    82   12.0   3:47 (321,  3)  
Apr. 30  21 29.71  -42 59.4   1.582   1.861    89   11.7   3:37 (325,  0)  

* 19P/Borrelly

Now it is bright as 10.6 mag (Apr. 22, Osamu Miyazaki). It will be fading after this. But it may stay brighter than this ephemeris for a while. In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it stays extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   5 46.42   41 51.0   1.917   1.606    56   11.9  20:09 (119, 39)  
Apr. 30   6 13.35   42 36.6   1.996   1.652    55   12.2  20:17 (120, 38)  

* 9P/Tempel 1

Now it is 13.0 mag (Apr. 10, Thomas Lehmann). It stays 12-13 mag for a while. It is observable in excellent condition in the Southern Hemisphere. It locates low until May in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  21 17.44  -21 31.9   1.505   1.617    77   12.4   3:47 (311, 15)  
Apr. 30  21 34.59  -21  8.7   1.473   1.639    80   12.5   3:37 (311, 16)  

* C/2021 A1 ( Leonard )

It brightened up to 3 mag from mid December to late December. Now it is fading. It has already faded down to 12.2 mag (Apr. 2, Thomas Lehmann). It is observable in good condition in the Southern Hemisphere. It is getting observable again also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  20 29.26  -37 18.7   1.784   2.079    92   12.9   3:47 (329,  9)  
Apr. 30  20 12.62  -38  0.6   1.734   2.177   101   13.1   3:37 (335, 11)  

* C/2021 P4 ( ATLAS )

Now it is 12.9 mag (Apr. 21, Michael Jager). 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)  
Apr. 23   2 50.06   58 55.6   2.397   1.871    47   13.6  20:09 (149, 20)  
Apr. 30   3 24.54   59 21.6   2.337   1.790    45   13.4  20:17 (149, 20)  

* C/2020 Y2 ( ATLAS )

Now it is 15.0 mag (Apr. 20, Chris Wyatt). It was expected to brighten up to 13 mag in spring. But actually, it is fainter than this ephemeris recently. 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)  
Apr. 23   6 36.59  -54  4.5   3.050   3.179    88   13.4  20:09 ( 29,-11)  
Apr. 30   6 32.35  -51 37.0   3.098   3.168    84   13.5  20:17 ( 35,-13)  

* C/2019 U5 ( PanSTARRS )

Now it is 13.9 mag (Apr. 21, Michael Jager). 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. In the Southern Hemisphere, it locates extremely low in 2022, but it will be observable in good condition in 2023.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  15 40.06   43 15.0   4.124   4.708   119   13.7   1:38 (180, 82)  
Apr. 30  15 27.13   43 37.5   4.082   4.671   120   13.6   0:58 (180, 81)  

* 116P/Wild 4

Now it is 13.7 mag (Apr. 21, Michael Jager). It is observable at 13 mag in good condition until early summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   9 33.29   17 24.6   1.763   2.276   107   13.7  20:09 ( 30, 70)  
Apr. 30   9 38.70   16 41.7   1.827   2.264   102   13.7  20:17 ( 45, 66)  

* C/2020 R7 ( ATLAS )

Now it is 15.5 mag (Apr. 5, Slooh.com Chile Observatory). 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)  
Apr. 23  22 48.30  -54 45.2   3.343   3.292    78   13.8   3:47 (324,-20)  
Apr. 30  22 46.41  -55 22.3   3.211   3.263    83   13.7   3:37 (326,-18)  

* 117P/Helin-Roman-Alu 1

Now it is 14.1 mag (Apr. 14, iTelescope Observatory, Siding Spring). It will brighten up to 13 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  19  2.90  -27 22.4   2.592   3.063   108   13.8   3:47 (342, 25)  
Apr. 30  19  6.30  -27 41.7   2.500   3.059   114   13.7   3:37 (346, 26)  

* C/2020 V2 ( ZTF )

Now it is 13.4 mag (Apr. 21, Michael Jager). 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 stays unobservable until 2023 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  10 42.12   61 25.8   4.364   4.588    96   13.8  20:36 (180, 64)  
Apr. 30  10 30.06   61  7.8   4.401   4.531    90   13.8  20:17 (174, 64)  

* 29P/Schwassmann-Wachmann 1

Now it is fainter than 14.3 mag (Mar. 22, Chris Wyatt). It is observable until April in the Southern Hemisphere, or until May in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   4 51.31   29  4.3   6.677   5.978    42   13.9  20:09 (110, 23)  
Apr. 30   4 56.81   29  5.7   6.751   5.981    37   14.0  20:17 (114, 18)  

* C/2020 K1 ( PanSTARRS )

Now it is 14.6 mag (Apr. 10, Michael Jager). 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 stays observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  19  1.37   18 46.9   4.437   4.713    99   14.3   3:47 (311, 67)  
Apr. 30  18 59.45   18 55.0   4.300   4.667   105   14.2   3:37 (321, 70)  

* 73P/Schwassmann-Wachmann 3

Now it is 16.4 mag (Apr. 21, Michael Jager). 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)  
Apr. 23   9 39.05   30 22.1   1.349   1.866   103   14.8  20:09 ( 60, 81)  
Apr. 30   9 39.81   29 25.7   1.363   1.802    97   14.6  20:17 ( 74, 74)  

* C/2018 U1 ( Lemmon )

Now it is 14.8 mag (Apr. 15, iTelescope Observatory, Siding Spring). It stays at 15-16 mag for a long time. 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)  
Apr. 23  16 49.60  -46 17.5   4.447   5.163   130   14.9   2:48 (  0,  9)  
Apr. 30  16 40.01  -47 23.6   4.391   5.176   137   14.9   2:11 (  0,  8)  

* 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 14.9 mag (Apr. 5, Chris Wyatt).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  12 50.97   29 57.7   3.983   4.741   134   14.9  22:44 (  0, 85)  
Apr. 30  12 41.79   30 42.7   4.097   4.784   128   15.0  22:08 (  0, 86)  

* 67P/Churyumov-Gerasimenko

It brightened up to 8.5 mag from autumn to winter (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 13.7 mag (Apr. 5, Chris Wyatt). 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. 23   9  6.73   20 43.6   1.853   2.263   100   14.9  20:09 ( 50, 69)  
Apr. 30   9 15.12   19 50.7   1.988   2.317    95   15.2  20:17 ( 60, 64)  

* C/2021 T2 ( Fuls )

It is expected to brighten up to 13.5 mag in early summer. In the Southern Hemisphere, it will appear in the morning sky in May. Then it stays observable in good condition after that. 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. 23   2  8.36   -9 54.3   2.308   1.430    22   15.4  20:09 (100,-31)  
Apr. 30   2 17.44  -11 50.3   2.207   1.382    26   15.1   3:37 (261,-33)  

* (3200) Phaethon

It approaches to Sun down to 0.14 a.u. on May 15. But it is not observable around that time. In the Northern Hemisphere, it will appear in the morning sky at 16 mag in June. It is hardly observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   3 38.30   17 55.1   1.470   0.687    24   15.8  20:09 (110,  3)  
Apr. 30   3 52.86   17 28.9   1.331   0.526    20   15.2  20:17 (112, -1)  

* C/2022 E3 ( ZTF )

Now it is 15.9 mag (Apr. 10, Michael Jager). It will approach to Earth down to 0.29 a.u. in 2023 February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it becomes unobservable from late September to early February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  20 14.41   11 18.9   3.700   3.739    84   15.6   3:47 (297, 50)  
Apr. 30  20 13.74   13  3.2   3.523   3.665    90   15.4   3:37 (300, 54)  

* C/2020 M5 ( ATLAS )

Now it is 15.1 mag (Apr. 5, Chris Wyatt). It became brighter after the perihelion passage. It will be fading after this, and it will be fainter than 18 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  10 42.62    5 44.1   3.142   3.837   127   15.6  20:37 (  0, 61)  
Apr. 30  10 36.49    4 59.0   3.282   3.877   119   15.7  20:17 (  7, 60)  

* C/2021 U5 ( Catalina )

Now it is 15.7 mag (Mar. 28, ATLAS-MLO, Mauna Loa). It continues brightening even after the perihelion passage. It is observable at 15 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  10 31.32    2 33.2   1.827   2.549   125   15.7  20:26 (  0, 58)  
Apr. 30  10 36.76    4 20.9   1.926   2.578   119   15.9  20:17 (  6, 59)  

* 104P/Kowal 2

It brightened very rapidly up to 9.2 mag in winter (Jan. 31, Chris Wyatt). Now it is fading. But it is still bright as 12.6 mag (Apr. 5, Chris Wyatt). It will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   8  8.47   14 44.5   1.354   1.666    88   15.8  20:09 ( 62, 55)  
Apr. 30   8 27.76   14  9.0   1.465   1.726    86   16.4  20:17 ( 65, 52)  

* C/2020 H6 ( ATLAS )

Now it is 15.7 mag (Apr. 10, Michael Jager). It stays observable at 16 mag from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  16 11.35   35 55.1   4.354   4.971   122   15.8   2:09 (180, 89)  
Apr. 30  16  7.40   37 26.3   4.369   4.989   122   15.8   1:37 (180, 88)  

* 325P/Yang-Gao

Now it is 17.8 mag (Apr. 21, J.-C. Merlin). It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than predicted by 2-3 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  20 18.93  -19  0.3   1.057   1.458    89   16.1   3:47 (321, 25)  
Apr. 30  20 33.70  -16  4.6   1.031   1.474    92   16.1   3:37 (320, 28)  

* C/2020 T2 ( Palomar )

It brightened up to 9.5 mag in early summer in 2021 (June 27, Marco Goiato). Now it is fading. It has already faded down to 18.2 mag (Apr. 18, E. Cortes). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it is not observable until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  22 42.36  -30 45.0   4.112   3.786    64   16.4   3:47 (304, -5)  
Apr. 30  22 49.67  -30 52.4   4.083   3.845    69   16.5   3:37 (306, -3)  

* 4P/Faye

It brightened up to 10.6 mag in autumn (Oct. 10, Osamu Miyazaki). Now it is fading. It has already faded down to 14.4 mag (Apr. 4, Toshihiko Ikemura, Hirohisa Sato). 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. 23   7 29.19   14 52.7   2.644   2.647    79   16.5  20:09 ( 72, 48)  
Apr. 30   7 38.75   14 50.1   2.774   2.691    74   16.7  20:17 ( 77, 43)  

* 152P/Helin-Lawrence

Now it is 17.1 mag (Apr. 2, A. Maury, G. Attard, D. Parrott). It will brighten up to 16 mag from spring to summer. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  19 46.61  -22  0.6   2.841   3.141    97   16.6   3:47 (330, 27)  
Apr. 30  19 51.15  -22  7.4   2.753   3.148   103   16.5   3:37 (333, 28)  

* C/2020 O2 ( Amaral )

Now it is 16.6 mag (Apr. 12, Hirohisa Sato). It was observed at 15 mag in 2021. Now it is fading. It stays observable at 16-17 mag for a while in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  18 47.08   17 36.7   4.874   5.200   103   16.6   3:47 (320, 68)  
Apr. 30  18 45.98   19 10.7   4.818   5.219   108   16.6   3:37 (329, 72)  

* C/2020 F5 ( MASTER )

It brightened up to 14 mag in 2021. Now it is fading. Appearing in the morning sky. It is observable at 16-17 mag in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  23 51.53    1 50.7   6.190   5.384    33   16.6   3:47 (268,  1)  
Apr. 30  23 55.29    2 48.6   6.157   5.417    39   16.6   3:37 (269,  4)  

* 246P/NEAT

It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It is observable at 16.5-17 mag in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  23 43.04  -16 18.6   4.213   3.568    44   16.6   3:47 (284, -8)  
Apr. 30  23 51.05  -15 45.2   4.162   3.586    49   16.6   3:37 (285, -6)  

* C/2019 F1 ( ATLAS-Africano )

Now it is 16.2 mag (Jan. 27, SONEAR Observatory, Oliveira). It will be fading slowly after this. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became extremely low temporarily from March to April. In the Northern Hemisphere, it is not observable until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   1 23.37  -30  2.1   5.178   4.500    43   16.7   3:47 (285,-35)  
Apr. 30   1 30.03  -29  9.0   5.179   4.536    45   16.7   3:37 (285,-32)  

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.6 mag (Apr. 9, Hirohisa Sato). It will be unobservable in June. But it will become observable again at 17 mag from autum to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   6 32.39   16 39.0   4.319   4.007    65   16.7  20:09 ( 84, 38)  
Apr. 30   6 38.90   17  9.4   4.419   4.014    60   16.8  20:17 ( 89, 32)  

* C/2020 PV6 ( PanSTARRS )

Now it is 16.4 mag (Mar. 22, Thomas Lehmann). 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)  
Apr. 23  12 20.95   44 19.0   2.588   3.198   118   16.7  22:14 (180, 81)  
Apr. 30  12  1.99   43  4.3   2.713   3.247   113   16.9  21:28 (180, 82)  

* 70P/Kojima

Now it is 16.1 mag (Apr. 9, Thomas Lehmann). It will be fading after this, and it will be fainter than 18 mag in June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  11 22.11   13 45.9   1.619   2.417   132   16.8  21:17 (  0, 69)  
Apr. 30  11 23.10   13 24.3   1.709   2.445   126   17.0  20:50 (  0, 68)  

* C/2020 F2 ( ATLAS )

Now it is 16.8 mag (Apr. 20, Catalina Sky Survey). 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)  
Apr. 23  13 58.14    1 31.2   7.851   8.831   166   16.9  23:52 (  0, 56)  
Apr. 30  13 53.47    2  1.6   7.868   8.828   161   16.9  23:20 (  0, 57)  

* C/2022 F2 ( NEOWISE )

Now it is 16.4 mag (Apr. 15, ATLAS Chile). It stays observable at 16-17 mag in April. However, it will fade out rapidly, and it will be fainter than 18 mag in late May. It is observable in excellent condition in the Southern Hemisphere. It is not observable at all in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   0 51.32  -85 21.9   1.159   1.635    97   17.0   3:47 (354,-36)  
Apr. 30   5 10.79  -79 29.5   1.210   1.660    96   17.1  20:17 ( 13,-33)  

* 99P/Kowal 1

Now it is 16.7 mag (Apr. 21, Michael Jager). It stays 17 mag for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  13 21.53   -8 10.7   3.715   4.706   169   17.0  23:15 (  0, 47)  
Apr. 30  13 18.25   -7 55.8   3.740   4.707   161   17.0  22:45 (  0, 47)  

* C/2019 O3 ( Palomar )

Now it is 16.5 mag (Apr. 21, Catalina Sky Survey). 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. 23  19 22.28   61  4.0   9.187   9.134    83   17.0   3:47 (202, 60)  
Apr. 30  19 19.84   62  6.6   9.181   9.144    84   17.1   3:37 (197, 61)  

* C/2021 G2 ( ATLAS )

Now it is 16.8 mag (Apr. 16, ATLAS Chile). 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)  
Apr. 23   7 14.78  -26 25.2   8.100   8.080    85   17.1  20:09 ( 41, 15)  
Apr. 30   7 17.12  -25 57.3   8.136   8.043    81   17.1  20:17 ( 47, 11)  

* C/2020 F7 ( Lemmon )

Now it is 17.4 mag (Apr. 7, ATLAS Chile). 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 locates extremely low, and it is observable only until April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   6 40.09  -42 17.1   5.477   5.462    83   17.1  20:09 ( 37, -2)  
Apr. 30   6 40.42  -41 51.0   5.541   5.474    80   17.2  20:17 ( 42, -6)  

* 110P/Hartley 3

It brightened rapidly up to 14.5 mag in winter (Feb. 9, Toshiyuki Takahashi). Now it is fading rapidly. It has already faded down to 17.7 mag (Apr. 16, Y. Sugiyama). It will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   8 16.74   11 34.3   2.486   2.701    91   17.3  20:09 ( 56, 55)  
Apr. 30   8 23.87   11  9.2   2.591   2.718    86   17.5  20:17 ( 63, 49)  

* 61P/Shajn-Schaldach

It has not been observed yet in this apparition. appearing in the morning sky. It will brighten up to 15 mag in autumn, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  22 47.41   -5 49.6   3.023   2.523    51   17.5   3:47 (284,  9)  
Apr. 30  22 59.02   -4 46.2   2.930   2.497    55   17.4   3:37 (284, 11)  

* C/2020 U5 ( PanSTARRS )

Now it is 16.8 mag (Apr. 6, 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)  
Apr. 23   0 17.07   75 56.3   4.067   3.756    65   17.4   3:47 (196, 32)  
Apr. 30   0 19.59   76 34.5   4.084   3.756    64   17.5   3:37 (196, 33)  

* C/2022 A2 ( PanSTARRS )

Now it is 17.9 mag (Apr. 20, Michael Jager). It is expected to brighten up to 12.5 mag in winter. It will become unobservable temporarily at 17 mag in July. In the Northern Hemisphere, it will become observable again in October. Then it stays observable in good condition after that. In the Southern Hemisphere, it is not observable at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  10 41.96   -2 22.2   3.220   3.938   129   17.5  20:36 (  0, 53)  
Apr. 30  10 37.16   -0 33.8   3.254   3.874   121   17.4  20:17 (  6, 54)  

* C/2019 K7 ( Smith )

It brightened up to 14.2 mag from summer to autumn in 2021 (Sept. 3, C. S. Morris). Now it is 17.3 mag (Apr. 13, Catalina Sky Survey). Fading slowly. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  16  9.25   68 38.7   6.720   6.896    95   17.5   2:06 (180, 56)  
Apr. 30  15 54.78   69 16.3   6.778   6.934    94   17.6   1:25 (180, 56)  

* C/2020 P3 ( ATLAS )

Now it is 17.6 mag (Apr. 10, Ken-ichi Kadota). It stayed 17.5 mag for a long time in 2021. It will be fading slowly after this. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  11 48.36   68 53.7   7.060   7.225    95   17.6  21:42 (180, 56)  
Apr. 30  11 42.90   67 58.9   7.131   7.240    92   17.6  21:10 (180, 57)  

* C/2021 C5 ( PanSTARRS )

Now it is 17.6 mag (Apr. 21, ATLAS Chile). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is observable only until May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   9 37.55  -16 23.9   3.700   4.242   116   17.6  20:09 ( 11, 38)  
Apr. 30   9 36.17  -16 24.3   3.748   4.202   110   17.6  20:17 ( 22, 36)  

* A/2021 X1

Now it is 17.1 mag (Apr. 17, ATLAS South Africa). It will brighten up to 15-16 mag in 2023. Cometary activity was detected by Cristovao Jacques on Dec. 12, and by Luca Buzzi and Andrea Aletti on Feb. 23.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23   6 17.17  -13 42.9   5.160   4.883    68   17.7  20:09 ( 60, 16)  
Apr. 30   6 16.82  -12 57.6   5.211   4.838    63   17.7  20:17 ( 67, 10)  

* C/2017 Y2 ( PanSTARRS )

Now it is 17.1 mag (Feb. 28, Hidetaka Sato). It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  14 35.38  -42 32.6   5.336   6.218   148   17.7   0:34 (  0, 12)  
Apr. 30  14 25.76  -42 30.5   5.345   6.253   152   17.8  23:52 (  0, 12)  

* C/2019 T3 ( ATLAS )

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

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  22 24.74   15 21.0   7.182   6.619    52   17.8   3:47 (269, 26)  
Apr. 30  22 25.93   15 22.5   7.115   6.640    58   17.8   3:37 (271, 29)  

* C/2018 N2 ( ASASSN )

Now it is 18.0 mag (Apr. 12, Ken-ichi Kadota). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. It locates extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  14 12.87   47 20.4   7.661   8.214   120   17.8   0:11 (180, 78)  
Apr. 30  14  7.61   47 11.0   7.739   8.260   118   17.9  23:33 (180, 78)  

* 100P/Hartley 1

Now it is 18.8 mag (Apr. 20, Michael Jager). It is observable at 17 mag from spring to summer. In the Northern Hemisphere, it becomes low in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 23  11 14.42   31 23.1   1.494   2.186   120   18.0  21:09 (  0, 86)  
Apr. 30  11 12.28   29 16.0   1.531   2.166   115   17.9  20:39 (  0, 84)  

* C/2022 E2 ( ATLAS )

Now it is 17.9 mag (Apr. 17, W. Hasubick). 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)  
Apr. 23   9 59.80  -26 22.8   7.430   8.006   121   17.9  20:09 (  4, 28)  
Apr. 30   9 57.43  -25 29.5   7.465   7.961   116   17.9  20:17 ( 13, 28)  

* C/2019 E3 ( ATLAS )

Now it is 17.2 mag (Apr. 11, ATLAS Chile). Very far object. It stays 18 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. 23   7 27.47  -64 41.9  10.575  10.754    97   17.9  20:09 ( 17,-15)  
Apr. 30   7 26.82  -64 13.6  10.579  10.743    96   17.9  20:17 ( 21,-17)  

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