Weekly Information about Bright Comets (2022 May 7: North)

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 Updated on May 10, 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 9.9 mag (May 4, Hirohisa Sato). 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   7  18 47.86   11 34.2   2.688   3.257   115    9.5   3:28 (346, 66)  
May  14  18 42.69   11 15.6   2.538   3.193   122    9.3   3:17 (  0, 66)

* 45P/Honda-Mrkos-Pajdusakova

It was very bright as 6.8 mag between Apr. 21 27 in the SOHO LASCO images (Hirohisa Sato). It is very bright as 6.7 mag still now (May 10, Mike 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   7   4  1.13   20 42.5   1.504   0.605    16    9.6  20:25 (119, -3)  
May  14   4 51.05   23  8.7   1.505   0.672    21   10.3  20:33 (118,  1)

* 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, 12.5 mag (May 10, 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   7   3 52.61   41 41.0   0.604   0.553    27   10.3  20:25 (137,  9)  
May  14   4 25.57   61 11.6   0.622   0.711    44   11.5  20:33 (153, 21)

* 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   7   7  8.76   12  5.1   4.086   3.711    61   10.5  20:25 ( 85, 28)  
May  14   7 15.11   11 13.7   4.190   3.730    56   10.6  20:33 ( 89, 22)

* 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)  
May   7   2  8.45    9 49.4   2.078   1.120    13   10.6   3:28 (246,-14)  
May  14   2 20.64    6 33.3   2.085   1.177    19   11.0   3:19 (250,-15)

* 22P/Kopff

Now it is 11.2 mag (May 1, 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)  
May   7  23 12.15   -6 10.8   1.893   1.633    59   11.2   3:28 (286, 11)  
May  14  23 28.73   -4 45.2   1.870   1.656    61   11.3   3:19 (285, 13)

* C/2021 E3 ( ZTF )

Now it is very bright as 11.4 mag (Apr. 30, Marco Goiato). 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)  
May   7  21 43.72  -49 25.8   1.451   1.837    94   11.4   3:28 (330, -5)  
May  14  22  2.44  -57  3.3   1.342   1.816   100   11.2   3:19 (335,-11)

* C/2019 T4 ( ATLAS )

Now it is bright as 11.7 mag (May 3, Hirohisa Sato). It stays observable at 11-12 mag until July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   7  11 43.98  -13 20.1   3.489   4.251   133   11.5  20:43 (  0, 42)  
May  14  11 44.41  -11 53.8   3.559   4.248   127   11.6  20:33 (  6, 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   7   4  1.89   59 23.0   2.278   1.711    44   12.3  20:25 (149, 21)  
May  14   4 41.27   58 52.1   2.221   1.633    42   12.0  20:33 (149, 21)

* 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   7   6 40.01   42 59.4   2.078   1.699    54   12.4  20:25 (121, 36)  
May  14   7  6.10   43  1.3   2.161   1.748    52   12.7  20:33 (122, 34)

* 9P/Tempel 1

Now it is 13.4 mag (Apr. 17, 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   7  21 50.65  -20 47.0   1.442   1.662    83   12.5   3:28 (311, 16)  
May  14  22  5.56  -20 28.5   1.411   1.688    86   12.6   3:19 (311, 17)

* 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   7  19 52.56  -38 38.0   1.691   2.274   112   13.2   3:28 (342, 14)  
May  14  19 29.16  -39  3.3   1.660   2.370   123   13.3   3:19 (351, 15)

* C/2020 R7 ( ATLAS )

Now it is 14.4 mag (May 1, Thomas Lehmann). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   7  22 42.79  -56 11.6   3.077   3.234    89   13.5   3:28 (328,-16)  
May  14  22 36.95  -57 13.1   2.943   3.207    95   13.4   3:19 (332,-14)

* C/2020 Y2 ( ATLAS )

Now it is 14.8 mag (May 3, 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   7   6 29.96  -49 21.6   3.149   3.158    81   13.5  20:25 ( 41,-17)  
May  14   6 28.96  -47 19.7   3.201   3.151    78   13.5  20:33 ( 46,-21)

* 117P/Helin-Roman-Alu 1

Now it is 14.9 mag (May 1, F. Kugel, J.-G. Bosch). It will brighten up to 13 mag in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   7  19  8.62  -28  3.4   2.413   3.055   120   13.6   3:28 (349, 26)  
May  14  19  9.82  -28 27.7   2.332   3.052   127   13.6   3:19 (354, 26)

* 116P/Wild 4

Now it is 13.8 mag (May 3, 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   7   9 45.21   15 53.5   1.894   2.253    97   13.7  20:25 ( 56, 61)  
May  14   9 52.69   15  0.1   1.962   2.243    92   13.7  20:33 ( 63, 55)

* 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   7  10 19.74   60 40.5   4.440   4.474    85   13.7  20:25 (162, 62)  
May  14  10 11.20   60  6.5   4.480   4.417    79   13.7  20:33 (153, 59)

* 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   7  15 13.60   43 44.6   4.053   4.633   119   13.9   0:17 (180, 81)  
May  14  14 59.85   43 35.3   4.039   4.597   117   13.8  23:30 (180, 82)

* C/2020 K1 ( PanSTARRS )

Now it is 14.5 mag (May 4, Hirohisa Sato). 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   7  18 56.66   18 59.4   4.168   4.621   110   14.1   3:28 (335, 73)  
May  14  18 52.98   18 58.8   4.040   4.575   116   14.0   3:19 (353, 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   7   5  2.52   29  7.3   6.816   5.983    31   14.0  20:25 (117, 12)  
May  14   5  8.41   29  9.0   6.872   5.985    26   14.0  20:33 (121,  7)

* 73P/Schwassmann-Wachmann 3

Now it is 16.2 mag (May 2, Michael Jager). 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   7   9 42.60   28 19.5   1.377   1.738    92   14.4  20:25 ( 80, 67)  
May  14   9 47.28   27  4.2   1.387   1.674    87   14.1  20:33 ( 83, 60)

* 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   7   8 45.86   13 27.5   1.580   1.786    84   14.2  20:25 ( 69, 48)  
May  14   9  2.90   12 41.1   1.700   1.846    81   14.7  20:33 ( 72, 44)

* (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   7   4  4.33   16 44.7   1.143   0.339    16   14.4  20:25 (115, -6)  
May  14   3 45.18   16 25.6   0.898   0.149     5   16.3  20:33 (125,-17)

* 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   7   2 27.57  -14  3.3   2.093   1.340    31   14.9   3:28 (264,-33)  
May  14   2 39.07  -16 38.0   1.967   1.305    36   14.6   3:19 (268,-32)

* 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   7  16 29.22  -48 23.0   4.351   5.191   142   14.8   1:33 (  0,  7)  
May  14  16 17.42  -49 13.8   4.327   5.206   147   14.8   0:54 (  0,  6)

* 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   7  20 12.03   14 54.6   3.349   3.590    95   15.2   3:28 (303, 59)  
May  14  20  9.12   16 53.1   3.179   3.516   101   15.0   3:19 (308, 64)

* 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   7  12 33.41   31 15.4   4.225   4.826   121   15.1  21:32 (  0, 86)  
May  14  12 25.95   31 37.1   4.363   4.869   114   15.3  20:57 (  0, 87)

* 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   7   9 23.77   18 56.7   2.124   2.371    91   15.5  20:25 ( 67, 59)  
May  14   9 32.63   18  1.6   2.262   2.425    86   15.8  20:33 ( 72, 53)

* 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   7   4 48.16   20 28.3   3.415   2.558    27   15.9  20:25 (112,  5)  
May  14   5  0.50   20 52.3   3.414   2.517    23   15.8  20:33 (116,  0)

* C/2020 H6 ( ATLAS )

Now it is 15.9 mag (May 3, 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   7  16  2.94   38 47.9   4.395   5.007   122   15.9   1:05 (180, 86)  
May  14  15 58.12   39 59.0   4.432   5.026   120   15.9   0:33 (180, 85)

* 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   7  10 31.66    4 13.3   3.430   3.919   111   15.9  20:25 ( 25, 57)  
May  14  10 28.03    3 27.2   3.585   3.960   104   16.1  20:33 ( 40, 52)

* 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   7  10 42.91    5 50.9   2.033   2.610   113   16.1  20:25 ( 21, 59)  
May  14  10 49.69    7  4.3   2.147   2.643   108   16.3  20:33 ( 34, 58)

* 325P/Yang-Gao

Now it is 18.4 mag (May 4, F. Kugel, J.-G. Bosch). 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   7  20 46.53  -13  5.3   1.008   1.494    95   16.1   3:28 (319, 31)  
May  14  20 57.39  -10  4.9   0.986   1.518    98   16.2   3:19 (319, 35)

* 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   7  19 54.75  -22 17.3   2.668   3.155   109   16.4   3:28 (336, 29)  
May  14  19 57.38  -22 30.8   2.587   3.163   115   16.4   3:19 (341, 30)

* 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   7  18 44.19   20 42.9   4.770   5.239   112   16.6   3:28 (343, 75)  
May  14  18 41.74   22 12.1   4.731   5.259   116   16.6   3:16 (  0, 77)

* 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   7  23 58.78    3 45.5   6.116   5.450    45   16.6   3:28 (271,  8)  
May  14   0  1.98    4 41.2   6.068   5.483    50   16.6   3:19 (272, 11)

* 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   7  22 56.38  -31  4.6   4.051   3.904    74   16.6   3:28 (307, -2)  
May  14  23  2.46  -31 21.6   4.017   3.963    79   16.7   3:19 (310,  0)

* 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   7  23 58.74  -15 15.1   4.105   3.604    53   16.6   3:28 (286, -3)  
May  14   0  6.07  -14 48.5   4.044   3.622    58   16.6   3:19 (288, -1)

* 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   7   1 36.42  -28 21.1   5.173   4.573    48   16.7   3:28 (286,-29)  
May  14   1 42.50  -27 38.3   5.162   4.610    52   16.7   3:19 (286,-26)

* 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   7   6 45.81   17 36.6   4.515   4.022    55   16.8  20:25 ( 94, 26)  
May  14   6 53.06   18  0.4   4.606   4.031    49   16.9  20:33 ( 98, 21)

* 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   7  13 48.89    2 29.9   7.902   8.826   154   16.9  22:48 (  0, 57)  
May  14  13 44.46    2 55.8   7.953   8.825   147   16.9  22:16 (  0, 58)

* 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   7   7 48.51   14 43.2   2.903   2.734    70   17.0  20:25 ( 81, 38)  
May  14   7 58.40   14 32.2   3.030   2.777    65   17.1  20:33 ( 85, 32)

* 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)  
May   7  13 15.28   -7 42.7   3.778   4.707   154   17.0  22:14 (  0, 47)  
May  14  13 12.73   -7 32.0   3.830   4.708   146   17.1  21:44 (  0, 47)

* 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   7   0 20.11    6 30.5   2.800   2.115    39   17.1   3:28 (265,  5)  
May  14   0 33.96    8  9.6   2.758   2.118    42   17.1   3:19 (265,  7)

* 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   7  19 16.50   63  7.1   9.176   9.155    85   17.1   3:28 (192, 61)  
May  14  19 12.22   64  4.6   9.174   9.166    86   17.1   3:19 (186, 61)

* 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   7   7 19.84  -25 31.7   8.172   8.006    77   17.1  20:25 ( 53,  6)  
May  14   7 22.90  -25  8.6   8.205   7.969    73   17.1  20:33 ( 58,  1)

* 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   7  11 25.20   12 54.7   1.806   2.474   120   17.1  20:25 (  0, 68)  
May  14  11 28.32   12 18.3   1.907   2.504   114   17.3  20:33 ( 20, 66)

* 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   7  11 46.40   41 35.2   2.852   3.297   107   17.2  20:45 (180, 84)  
May  14  11 33.95   39 58.4   3.002   3.347   101   17.4  20:33 (133, 83)

* 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   7  23 10.52   -3 42.7   2.836   2.472    58   17.3   3:28 (284, 13)  
May  14  23 21.91   -2 39.6   2.740   2.447    62   17.2   3:19 (284, 15)

* 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   7   6 41.42  -41 29.5   5.602   5.485    78   17.2  20:25 ( 46,-10)  
May  14   6 42.99  -41 13.4   5.660   5.498    75   17.3  20:33 ( 50,-15)

* 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)  
May   7   6  3.46  -71 45.3   1.287   1.689    93   17.3  20:25 ( 21,-30)  
May  14   6 26.22  -64 59.7   1.386   1.723    90   17.6  20:33 ( 29,-29)

* C/2022 A2 ( PanSTARRS )

Now it is 17.5 mag (Apr. 25, ATLAS-MLO, Mauna Loa). 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   7  10 33.27    1  8.5   3.298   3.810   113   17.4  20:25 ( 23, 54)  
May  14  10 30.33    2 43.5   3.350   3.745   105   17.4  20:33 ( 38, 51)

* 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   7   6 17.02  -12 16.7   5.257   4.795    57   17.4  20:25 ( 73,  3)  
May  14   6 17.65  -11 40.0   5.293   4.751    52   17.4  20:33 ( 78, -3)

* 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   7  22 37.33    1 52.2   1.276   1.247    64   18.1   3:28 (285, 23)  
May  14  23 10.16    4 44.7   1.190   1.158    62   17.5   3:19 (280, 22)

* 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   7   0 20.52   77 21.1   4.094   3.757    63   17.5   3:28 (195, 34)  
May  14   0 19.27   78 15.4   4.098   3.759    63   17.5   3:19 (194, 35)

* 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   7   9 35.65  -16 26.6   3.799   4.163   104   17.6  20:25 ( 32, 32)  
May  14   9 35.97  -16 31.8   3.853   4.124    98   17.6  20:33 ( 40, 28)

* 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   7  15 39.36   69 41.7   6.842   6.973    93   17.6   0:42 (180, 55)  
May  14  15 23.52   69 54.6   6.910   7.012    91   17.7  23:52 (180, 55)

* 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 17.8 mag (Apr. 22, Ken-ichi Kadota). It will be fainter than 18 mag in May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   7   8 31.57   10 41.2   2.696   2.735    81   17.6  20:25 ( 69, 44)  
May  14   8 39.74   10 10.2   2.800   2.753    76   17.8  20:33 ( 74, 38)

* 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   7  11 38.71   66 59.4   7.204   7.256    88   17.7  20:38 (180, 58)  
May  14  11 35.73   65 56.2   7.279   7.272    85   17.7  20:33 (175, 59)

* 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   7  11 11.87   27  0.3   1.575   2.148   110   17.8  20:25 ( 20, 81)  
May  14  11 13.08   24 38.8   1.623   2.130   105   17.7  20:33 ( 48, 75)

* 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   7  14 16.23  -42 21.1   5.372   6.288   153   17.8  23:15 (  0, 13)  
May  14  14  7.03  -42  5.2   5.416   6.323   151   17.9  22:38 (  0, 13)

* 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   7  22 26.73   15 23.2   7.040   6.661    64   17.8   3:28 (274, 33)  
May  14  22 27.12   15 22.7   6.959   6.683    70   17.8   3:19 (277, 37)

* 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   7   9 55.55  -24 37.0   7.510   7.918   110   17.9  20:25 ( 23, 27)  
May  14   9 54.15  -23 46.2   7.560   7.873   104   17.9  20:33 ( 32, 24)

* C/2018 N2 ( ASASSN )

Now it is 17.6 mag (May 3, B. Vauquelin). 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)  
May   7  14  2.55   46 55.4   7.825   8.307   115   17.9  23:01 (180, 78)  
May  14  13 57.80   46 33.9   7.919   8.354   112   18.0  22:29 (180, 79)

* C/2019 E3 ( ATLAS )

Now it is 16.7 mag (May 3, 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   7   7 26.86  -63 46.8  10.586  10.733    95   17.9  20:25 ( 24,-19)  
May  14   7 27.50  -63 22.2  10.595  10.723    94   17.9  20:33 ( 27,-22)

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