Weekly Information about Bright Comets (2022 May 14: North)

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 Updated on May 16, 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/2017 K2 ( PanSTARRS )

Now it is bright as 10.2 mag (May 7, Carlos Labordena). 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)  
May  14  18 42.69   11 15.6   2.538   3.193   122    9.3   3:17 (  0, 66)  
May  21  18 35.94   10 45.8   2.395   3.130   128    9.1   2:43 (  0, 66)

* 45P/Honda-Mrkos-Pajdusakova

Appearing in the evening sky. Now it is very bright as 7.2 mag (May 1Mike Olason). 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)  
May  14   4 51.05   23  8.7   1.505   0.672    21   10.3  20:33 (118,  1)  
May  21   5 39.66   24 31.9   1.526   0.756    25   11.1  20:41 (118,  4)

* C/2019 L3 ( ATLAS )

Now it is 10.1 mag (May 4, Osamu Miyazaki). 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)  
May  14   7 15.11   11 13.7   4.190   3.730    56   10.6  20:33 ( 89, 22)  
May  21   7 21.74   10 21.8   4.289   3.750    51   10.7  20:41 ( 92, 15)

* 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 is appearing in the morning sky. It stays observable in good condition after this. In the Northern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   2 20.64    6 33.3   2.085   1.177    19   11.0   3:19 (250,-15)  
May  21   2 32.51    3 14.4   2.080   1.242    25   11.5   3:12 (254,-16)

* C/2021 E3 ( ZTF )

Now it is very bright as 9.8 mag (May 6, Marco Goiato). It stays bright as 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)  
May  14  22  2.44  -57  3.3   1.342   1.816   100   11.2   3:19 (335,-11)  
May  21  22 31.67  -65 42.2   1.263   1.800   104   11.1   3:12 (340,-18)

* 22P/Kopff

Now it is 11.8 mag (May 6, Chris Wyatt). 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)  
May  14  23 28.73   -4 45.2   1.870   1.656    61   11.3   3:19 (285, 13)  
May  21  23 44.57   -3 23.3   1.846   1.681    64   11.4   3:12 (285, 14)

* C/2019 T4 ( ATLAS )

Now it is bright as 12.3 mag (May 6, Chris Wyatt). It stays observable at 11-12 mag until July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  11 44.41  -11 53.8   3.559   4.248   127   11.6  20:33 (  6, 43)  
May  21  11 45.50  -10 33.7   3.639   4.245   120   11.6  20:41 ( 17, 43)

* C/2021 P4 ( ATLAS )

Now it is bright as 12.7 mag (May 2, Michael Jager). It is expected to brighten up to 9-10 mag in summer. In the Northern Hemisphere, it stays observable in good condition until June when it brightens up to 10 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)  
May  14   4 41.27   58 52.1   2.221   1.633    42   12.0  20:33 (149, 21)  
May  21   5 21.42   57 42.6   2.167   1.556    41   11.7  20:41 (147, 20)

* C/2021 O3 ( PanSTARRS )

It was expected to brighten up to 4 mag, but the comet was disintegrated around the perihelion passage. In the Southern Hemisphere, it was observable in the extremely low sky in mid April. But it was not detected, fainter than 9.0 mag (Apr. 21, Michael Mattiazzo). In the Northern Hemisphere, it is appearing in the evening sky. Now it is very faint and diffuse, 12.7 mag (May 12, Michael Jager). It stays observable in good condition after this 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)  
May  14   4 25.57   61 11.6   0.622   0.711    44   12.2  20:33 (153, 21)  
May  21   5 41.15   75 25.5   0.698   0.864    57   13.5  20:41 (164, 31)

* 9P/Tempel 1

Now it is 13.2 mag (May 4, 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)  
May  14  22  5.56  -20 28.5   1.411   1.688    86   12.6   3:19 (311, 17)  
May  21  22 19.27  -20 14.6   1.379   1.715    90   12.7   3:12 (312, 18)

* 19P/Borrelly

Now it is bright as 10.4 mag (May 4, 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)  
May  14   7  6.10   43  1.3   2.161   1.748    52   12.7  20:33 (122, 34)  
May  21   7 31.37   42 44.6   2.246   1.797    51   13.0  20:41 (122, 32)

* C/2020 R7 ( ATLAS )

Now it is 13.7 mag (May 14, Giuseppe Pappa). 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)  
May  14  22 36.95  -57 13.1   2.943   3.207    95   13.4   3:19 (332,-14)  
May  21  22 28.23  -58 25.9   2.811   3.181   102   13.3   3:12 (335,-13)

* 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)  
May  14  19 29.16  -39  3.3   1.660   2.370   123   13.3   3:19 (351, 15)  
May  21  19  3.01  -39  8.3   1.647   2.464   134   13.5   3:11 (  0, 16)

* 117P/Helin-Roman-Alu 1

Now it is 14.2 mag (May 4, Thomas Lehmann). It will brighten up to 13 mag in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  19  9.82  -28 27.7   2.332   3.052   127   13.6   3:19 (354, 26)  
May  21  19  9.86  -28 54.3   2.258   3.049   133   13.5   3:12 (359, 26)

* C/2020 Y2 ( ATLAS )

Now it is 14.9 mag (May 6, 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)  
May  14   6 28.96  -47 19.7   3.201   3.151    78   13.5  20:33 ( 46,-21)  
May  21   6 29.01  -45 31.6   3.252   3.144    74   13.5  20:41 ( 51,-25)

* C/2020 V2 ( ZTF )

Now it is 13.3 mag (May 2, 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)  
May  14  10 11.20   60  6.5   4.480   4.417    79   13.7  20:33 (153, 59)  
May  21  10  4.41   59 27.9   4.518   4.360    74   13.7  20:41 (146, 55)

* 116P/Wild 4

Now it is 13.8 mag (May 6, Chris Wyatt). 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)  
May  14   9 52.69   15  0.1   1.962   2.243    92   13.7  20:33 ( 63, 55)  
May  21  10  1.01   14  2.0   2.030   2.233    87   13.8  20:41 ( 69, 49)

* C/2019 U5 ( PanSTARRS )

Now it is 13.8 mag (May 4, Hirohisa Sato). It is expected to brighten up to 12 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. 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)  
May  14  14 59.85   43 35.3   4.039   4.597   117   13.8  23:30 (180, 82)  
May  21  14 46.28   43  9.3   4.038   4.560   115   13.8  22:49 (180, 82)

* 73P/Schwassmann-Wachmann 3

Now it is 15.9 mag (May 13, Giuseppe Pappa). It is expected to brighten up to 11 mag from summer to autumn. However, it is fainter than this ephemeris recently. 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)  
May  14   9 47.28   27  4.2   1.387   1.674    87   14.1  20:33 ( 83, 60)  
May  21   9 53.68   25 40.1   1.395   1.610    82   13.8  20:41 ( 86, 54)

* C/2020 K1 ( PanSTARRS )

Now it is 14.3 mag (May 6, Chris Wyatt). 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)  
May  14  18 52.98   18 58.8   4.040   4.575   116   14.0   3:19 (353, 74)  
May  21  18 48.42   18 51.7   3.919   4.530   121   13.8   2:56 (  0, 74)

* 29P/Schwassmann-Wachmann 1

Now it is 16.7 mag (Apr. 30, Jean-Francois Soulier). In the Southern Hemisphere, it is already not observable. It will be unobservable soon also in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   5  8.41   29  9.0   6.872   5.985    26   14.0  20:33 (121,  7)  
May  21   5 14.43   29 10.7   6.919   5.987    21   14.0  20:41 (125,  2)

* C/2021 T2 ( Fuls )

It is expected to brighten up to 13.5 mag in early summer. In the Southern Hemisphere, it is appearing in the morning sky. It stays observable in good condition after this. In the Northern Hemisphere, it is not observable at all. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   2 39.07  -16 38.0   1.967   1.305    36   14.6   3:19 (268,-32)  
May  21   2 52.41  -19 39.8   1.833   1.278    42   14.4   3:12 (272,-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)  
May  14   3 45.18   16 25.6   0.898   0.149     5   16.3  20:33 (125,-17)  
May  21   2 43.92   20 51.1   0.989   0.270    15   14.5   3:12 (239, -7)

* 104P/Kowal 2

It brightened very rapidly up to 9.2 mag in winter (Jan. 31, Chris Wyatt). Now it is fading. It has already faded down to 14.7 mag (May 3, Chris Wyatt). It will be fainter than 18 mag in July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   9  2.90   12 41.1   1.700   1.846    81   14.7  20:33 ( 72, 44)  
May  21   9 19.03   11 50.7   1.822   1.905    78   15.1  20:41 ( 75, 40)

* C/2022 E3 ( ZTF )

Now it is 15.1 mag (May 4, Hirohisa Sato). 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)  
May  14  20  9.12   16 53.1   3.179   3.516   101   15.0   3:19 (308, 64)  
May  21  20  4.81   18 58.3   3.016   3.440   106   14.8   3:12 (316, 69)

* C/2018 U1 ( Lemmon )

Now it is 15.7 mag (May 1, Thomas Lehmann). 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)  
May  14  16 17.42  -49 13.8   4.327   5.206   147   14.8   0:54 (  0,  6)  
May  21  16  4.90  -49 54.8   4.320   5.221   150   14.9   0:14 (  0,  5)

* C/2020 J1 ( SONEAR )

It brightened up to 12.3 mag from spring to summer in 2021 (June 15, 2021, Marco Goiato). Now it is fading. It has already faded down to 14.9 mag (May 2, Michael Jager). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  12 25.95   31 37.1   4.363   4.869   114   15.3  20:57 (  0, 87)  
May  21  12 19.47   31 49.3   4.509   4.912   107   15.4  20:41 ( 49, 85)

* 81P/Wild 2

Now it is 16.5 mag (Apr. 13, ATLAS-HKO, Haleakala). It will brighten up to 11.5 mag in 2022 winter. It stays observable while the comet will be brightening slowly. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   5  0.50   20 52.3   3.414   2.517    23   15.8  20:33 (116,  0)  
May  21   5 13.30   21 13.1   3.406   2.476    19   15.7  20:41 (119, -3)

* 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 15.9 mag (May 4, Catalina Sky Survey). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   9 32.63   18  1.6   2.262   2.425    86   15.8  20:33 ( 72, 53)  
May  21   9 41.63   17  5.4   2.400   2.478    82   16.1  20:41 ( 76, 47)

* C/2020 H6 ( ATLAS )

Now it is 15.8 mag (May 8, Thomas Lehmann). It stays observable at 16 mag from 2021 to 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  15 58.12   39 59.0   4.432   5.026   120   15.9   0:33 (180, 85)  
May  21  15 53.09   40 58.8   4.478   5.046   118   15.9   0:01 (180, 84)

* C/2020 M5 ( ATLAS )

It became brighter after the perihelion passage, and it brightened up to 13.4 mag in early 2022 (Jan. 7, Hiroshi Abe). Now it is fading. It has already faded down to 15.4 mag (May 3, Chris Wyatt). It will be fainter than 18 mag in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  10 28.03    3 27.2   3.585   3.960   104   16.1  20:33 ( 40, 52)  
May  21  10 25.49    2 40.7   3.744   4.003    97   16.2  20:41 ( 51, 45)

* 325P/Yang-Gao

Now it is 17.9 mag (May 11, Giuseppe Pappa). 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)  
May  14  20 57.39  -10  4.9   0.986   1.518    98   16.2   3:19 (319, 35)  
May  21  21  6.27   -7  6.1   0.966   1.544   102   16.3   3:12 (320, 39)

* C/2021 U5 ( Catalina )

It continued brightening even after the perihelion passage, and it brightened up to 15.2 mag (Feb. 16, Ken-ichi Kadota). Now it is fading. It has already faded down to 17.5 mag (May 1, Catalina Sky Survey). It will be fainter than 18 mag in July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  10 49.69    7  4.3   2.147   2.643   108   16.3  20:33 ( 34, 58)  
May  21  10 57.01    8  2.5   2.265   2.677   102   16.5  20:41 ( 46, 55)

* 152P/Helin-Lawrence

Now it is 17.2 mag (May 4, ATLAS South Africa). 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)  
May  14  19 57.38  -22 30.8   2.587   3.163   115   16.4   3:19 (341, 30)  
May  21  19 58.98  -22 48.1   2.511   3.171   122   16.3   3:12 (345, 31)

* C/2020 O2 ( Amaral )

Now it is 16.8 mag (May 4, 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)  
May  14  18 41.74   22 12.1   4.731   5.259   116   16.6   3:16 (  0, 77)  
May  21  18 38.65   23 37.0   4.701   5.280   119   16.6   2:46 (  0, 79)

* 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)  
May  14   0  1.98    4 41.2   6.068   5.483    50   16.6   3:19 (272, 11)  
May  21   0  4.84    5 35.7   6.012   5.517    56   16.6   3:12 (274, 16)

* 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)  
May  14   0  6.07  -14 48.5   4.044   3.622    58   16.6   3:19 (288, -1)  
May  21   0 13.01  -14 25.9   3.977   3.640    63   16.6   3:12 (289,  2)

* 169P/NEAT

Now it is 17.9 mag (Apr. 26, J. Drummond). It will brighten rapidly, and it will brighten up to 12 mag from June to July. It stays observable in the morning sky until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  23 10.16    4 44.7   1.190   1.158    62   17.5   3:19 (280, 22)  
May  21  23 47.04    7 49.9   1.122   1.069    59   16.6   3:12 (275, 21)

* 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 17.7 mag (May 3, ATLAS Chile). In the Northern Hemisphere, it is not observable until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  23  2.46  -31 21.6   4.017   3.963    79   16.7   3:19 (310,  0)  
May  21  23  7.89  -31 43.8   3.982   4.022    85   16.8   3:12 (312,  2)

* C/2019 F1 ( ATLAS-Africano )

It brightened up to 14.2 mag in 2021 summer (July 18, 2021, Taras Prystavski). Now it is fading. It has already faded down to 16.2 mag (Jan. 27, SONEAR Observatory, Oliveira). 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)  
May  14   1 42.50  -27 38.3   5.162   4.610    52   16.7   3:19 (286,-26)  
May  21   1 48.27  -27  0.7   5.145   4.647    55   16.7   3:12 (287,-23)

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.7 mag (Apr. 22, Ken-ichi Kadota). 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)  
May  14   6 53.06   18  0.4   4.606   4.031    49   16.9  20:33 ( 98, 21)  
May  21   7  0.61   18 21.0   4.692   4.039    44   16.9  20:41 (102, 15)

* C/2020 F2 ( ATLAS )

Now it is 16.8 mag (May 1, 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)  
May  14  13 44.46    2 55.8   7.953   8.825   147   16.9  22:16 (  0, 58)  
May  21  13 40.25    3 19.2   8.018   8.823   140   16.9  21:44 (  0, 58)

* 44P/Reinmuth 2

Appearing in the morning sky. It will be observable at 16.5 mag in good condition from summer to autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   0 33.96    8  9.6   2.758   2.118    42   17.1   3:19 (265,  7)  
May  21   0 47.68    9 46.7   2.714   2.123    45   17.0   3:12 (264,  9)

* 99P/Kowal 1

Now it is 16.6 mag (May 2, Purple Mountain Observatory). It stays 17 mag for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  13 12.73   -7 32.0   3.830   4.708   146   17.1  21:44 (  0, 47)  
May  21  13 10.68   -7 24.1   3.893   4.708   139   17.1  21:15 (  0, 47)

* C/2021 G2 ( ATLAS )

Now it is 16.8 mag (Apr. 29, ATLAS South Africa). 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)  
May  14   7 22.90  -25  8.6   8.205   7.969    73   17.1  20:33 ( 58,  1)  
May  21   7 26.27  -24 48.2   8.236   7.932    69   17.1  20:41 ( 63, -5)

* C/2019 O3 ( Palomar )

Now it is 16.5 mag (May 3, V. Nevski). 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)  
May  14  19 12.22   64  4.6   9.174   9.166    86   17.1   3:19 (186, 61)  
May  21  19  6.97   64 58.4   9.174   9.177    87   17.1   3:12 (180, 60)

* 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)  
May  14  23 21.91   -2 39.6   2.740   2.447    62   17.2   3:19 (284, 15)  
May  21  23 33.17   -1 37.3   2.643   2.423    66   17.1   3:12 (285, 18)

* 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 16.4 mag (May 5, Catalina Sky Survey). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   7 58.40   14 32.2   3.030   2.777    65   17.1  20:33 ( 85, 32)  
May  21   8  8.37   14 17.3   3.156   2.820    61   17.3  20:41 ( 89, 27)

* C/2020 F7 ( Lemmon )

Now it is 17.8 mag (Apr. 22, 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. It is not observable in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   6 42.99  -41 13.4   5.660   5.498    75   17.3  20:33 ( 50,-15)  
May  21   6 45.06  -41  2.8   5.714   5.511    73   17.3  20:41 ( 54,-21)

* C/2022 A2 ( PanSTARRS )

Now it is 17.6 mag (May 13, Giuseppe Pappa). 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)  
May  14  10 30.33    2 43.5   3.350   3.745   105   17.4  20:33 ( 38, 51)  
May  21  10 28.32    4 10.8   3.408   3.681    97   17.3  20:41 ( 51, 47)

* 70P/Kojima

Now it is 16.4 mag (Apr. 28, 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)  
May  14  11 28.32   12 18.3   1.907   2.504   114   17.3  20:33 ( 20, 66)  
May  21  11 32.34   11 36.1   2.014   2.534   109   17.5  20:41 ( 36, 62)

* C/2021 X1 ( Maury-Attard )

Now it is 17.1 mag (Apr. 17, ATLAS South Africa). It will brighten up to 14 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time although it becomes extremely low temporarily in June. In the Northern Hemisphere, it is not observable now. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   6 17.65  -11 40.0   5.293   4.751    52   17.4  20:33 ( 78, -3)  
May  21   6 18.67  -11  7.8   5.322   4.707    48   17.4  20:41 ( 83,-10)

* C/2020 PV6 ( PanSTARRS )

It brightened up to 13.9 mag in 2021 (Aug. 28, 2021, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 17.6 mag (May 3, Thomas Lehmann). It will be fainter than 18 mag in June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  11 33.95   39 58.4   3.002   3.347   101   17.4  20:33 (133, 83)  
May  21  11 24.25   38 18.7   3.161   3.397    94   17.6  20:41 (107, 75)

* C/2020 U5 ( PanSTARRS )

Now it is 17.2 mag (May 4, Hirohisa Sato). 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)  
May  14   0 19.27   78 15.4   4.098   3.759    63   17.5   3:19 (194, 35)  
May  21   0 14.98   79 16.2   4.096   3.762    63   17.6   3:12 (193, 37)

* C/2022 F2 ( NEOWISE )

Now it is 16.6 mag (May 3, M. Mattiazzo). It was 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)  
May  14   6 26.22  -64 59.7   1.386   1.723    90   17.6  20:33 ( 29,-29)  
May  21   6 40.54  -59 23.1   1.498   1.760    86   17.8  20:41 ( 36,-29)

* C/2021 C5 ( PanSTARRS )

Now it is 17.6 mag (May 3, 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)  
May  14   9 35.97  -16 31.8   3.853   4.124    98   17.6  20:33 ( 40, 28)  
May  21   9 37.08  -16 40.4   3.909   4.085    92   17.6  20:41 ( 47, 23)

* 100P/Hartley 1

Now it is 17.8 mag (Apr. 25, J.-G. Bosch). 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)  
May  14  11 13.08   24 38.8   1.623   2.130   105   17.7  20:33 ( 48, 75)  
May  21  11 15.73   22 13.4   1.675   2.114   100   17.6  20:41 ( 59, 68)

* 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 17.4 mag (May 3, 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)  
May  14  15 23.52   69 54.6   6.910   7.012    91   17.7  23:52 (180, 55)  
May  21  15  7.83   69 55.0   6.983   7.050    89   17.7  23:09 (180, 55)

* C/2020 P3 ( ATLAS )

Now it is 17.8 mag (Apr. 28, W. Hasubick). 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)  
May  14  11 35.73   65 56.2   7.279   7.272    85   17.7  20:33 (175, 59)  
May  21  11 33.87   64 50.1   7.355   7.288    82   17.7  20:41 (167, 59)

* C/2022 J1 ( Maury-Attard )

Now it is 17.2 mag (May 10, Hirohisa Sato). It stays 17-18 mag until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14  21  7.65  -22 13.9   1.482   1.935   100   17.7   3:19 (324, 23)  
May  21  20 49.55  -19 29.7   1.396   1.987   110   17.7   3:12 (331, 30)

* 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 18.0 mag (Apr. 29, Mt. Lemmon Survey). It will be fainter than 18 mag in May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   8 39.74   10 10.2   2.800   2.753    76   17.8  20:33 ( 74, 38)  
May  21   8 48.30    9 36.1   2.904   2.771    72   18.0  20:41 ( 78, 32)

* 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)  
May  14  22 27.12   15 22.7   6.959   6.683    70   17.8   3:19 (277, 37)  
May  21  22 27.08   15 20.5   6.873   6.705    76   17.8   3:12 (280, 41)

* C/2022 E2 ( ATLAS )

Now it is 18.1 mag (May 3, ATLAS Chile). It is expected to brighten up to 12-13 mag from 2024 to 2025. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May  14   9 54.15  -23 46.2   7.560   7.873   104   17.9  20:33 ( 32, 24)  
May  21   9 53.23  -22 57.5   7.616   7.829    98   17.8  20:41 ( 40, 20)

* 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)  
May  14  14  7.03  -42  5.2   5.416   6.323   151   17.9  22:38 (  0, 13)  
May  21  13 58.33  -41 43.8   5.477   6.358   148   17.9  22:02 (  0, 13)

* C/2019 E3 ( ATLAS )

Now it is 17.3 mag (May 5, 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)  
May  14   7 27.50  -63 22.2  10.595  10.723    94   17.9  20:33 ( 27,-22)  
May  21   7 28.68  -63  0.1  10.605  10.713    93   17.9  20:41 ( 29,-25)

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