Weekly Information about Bright Comets (2021 June 19: North)

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 Updated on June 19, 2021
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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/2020 T2 ( Palomar )

It brightened rapidly. Now it is very bright as 10.3 mag (June 15, Goiato). It stays observable at 10-11 mag in good condition for a long time from spring to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  13 42.12   15 30.2   1.518   2.072   108   11.0  21:03 ( 44, 64)  
June 26  13 46.72   12 19.7   1.558   2.063   104   11.0  21:04 ( 49, 58)

* 7P/Pons-Winnecke

Now it is very bright as 9.7 mag (June 4, Michael Jager). It stays bright as 10-12 mag until August. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it becomes extremely low after July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  22 40.49  -23 56.8   0.445   1.266   114   11.3   2:58 (331, 26)  
June 26  23  3.63  -28 41.5   0.456   1.288   116   11.2   3:01 (335, 22)

* 15P/Finlay

Now it is very bright as 11.4 mag (June 6, Thomas Lehmann). It will brighten very rapidly, and it will brighten up to 10 mag from July to August. It stays observable in the morning sky for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   1 49.51    6 28.8   1.088   1.054    60   11.8   2:58 (273, 16)  
June 26   2 21.73   10 17.9   1.097   1.024    57   11.3   3:01 (269, 17)

* 4P/Faye

Now it is 13.3 mag (June 8, Ken-ichi Kadota). It will brighten up to 10 mag from summer to autumn, and it will be observable in excellent condition. Appearing in the morning sky. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   1 26.82   11 34.9   2.033   1.819    63   12.5   2:58 (272, 23)  
June 26   1 44.64   12 53.7   1.954   1.789    65   12.3   3:01 (272, 26)

* C/2019 L3 ( ATLAS )

Now it is 12.2 mag (May 31, Thomas Lehmann). It will brighten up to 10 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes extremely low temporarily from May to June. In the Southern Hemisphere, it is not observable until November. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   4 51.85   49 44.6   4.868   4.007    28   12.4   2:58 (214,  9)  
June 26   5  5.21   49 29.6   4.828   3.978    29   12.3   3:01 (216, 11)

* C/2017 K2 ( PanSTARRS )

Now it is 12.3 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it is not observable at the high light from 2022 summer to 2023 summer. In the Southern Hemisphere, it stays extremely low for a while. But it will be observable in good condition at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  17 44.42   43 18.0   5.610   6.083   113   12.6  23:52 (180, 82)  
June 26  17 37.83   42 55.5   5.554   6.025   113   12.5  23:18 (180, 82)

* 10P/Tempel 2

Now it is 11 mag (May 12, Giuseppe Pappa). In the Southern Hemisphere, it is locates high in the morning sky. Appearing in the morning sky also in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   2 32.33    5 30.0   2.118   1.672    50   12.8   2:58 (268,  6)  
June 26   2 48.32    6 21.1   2.109   1.709    53   13.0   3:01 (269, 10)

* 8P/Tuttle

Now it is 16.1 mag (June 8, Ken-ichi Kadota). Brightening very rapidly. It will brighten up to 8.5 mag from September to October. But the condition is bad in this apparition. In the Northern Hemisphere, it is observable only in the extremely low sky until July. In the Southern Hemisphere, it will be observable after late August. But it stays locating low for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   4 38.43   42 23.4   2.319   1.452    24   13.4   2:58 (221,  6)  
June 26   5  5.71   40 38.7   2.261   1.385    23   13.0   3:01 (223,  5)

* C/2020 J1 ( SONEAR )

Now it is bright as 12.3 mag (June 15, Marco Goiato). It stays 13 mag until early summer. In the Southern 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)  
June 19  14 12.66  -17  1.5   2.673   3.404   128   13.3  21:03 ( 13, 37)  
June 26  14  3.50  -14 51.8   2.799   3.416   119   13.4  21:04 ( 24, 37)

* 246P/NEAT

Now it is 13.9 mag (May 13, Taras Prystavski). It stays 13-14 mag from 2020 to 2021. It will be observable in good condition after this in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  19 20.87  -31 21.1   1.964   2.932   158   13.6   1:33 (  0, 24)  
June 26  19 16.05  -32 11.6   1.948   2.940   164   13.6   1:01 (  0, 23)

* 29P/Schwassmann-Wachmann 1

Appearing in the morning sky soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   4  2.23   28 33.7   6.797   5.889    24   13.9   2:58 (236,  2)  
June 26   4  8.11   28 51.0   6.752   5.891    29   13.9   3:01 (239,  7)

* C/2019 T4 ( ATLAS )

Now it is 14.3 mag (June 6, Chris Wyatt). It is expected to brighten up to 11.5 mag in 2022. It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is not observable until November. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   8 48.89  -23 51.1   5.503   5.143    64   14.0  21:03 ( 71,-14)  
June 26   8 55.74  -23 23.7   5.539   5.112    60   14.0  21:04 ( 74,-18)

* C/2019 F1 ( ATLAS-Africano )

Now it is 14.7 mag (June 15, Chris Wyatt). It was expected to brighten up to 13 mag from spring to summer. But actually, it is fainter than originally expected. It stays 14-15 mag until early autumn. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until July in 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  23  0.56  -83 25.8   3.051   3.596   114   14.5   2:58 (356,-29)  
June 26  23 25.39  -84 22.1   3.053   3.596   114   14.5   3:01 (356,-30)

* C/2020 R4 ( ATLAS )

It brightened up to 8.9 mag in April (Apr. 12, Carlos Labordena). Now it is fading. It has already faded down to 14.0 mag (June 6, Chris Wyatt). It will be fading and getting lower rapidly after this. It will be unobservable at 17 mag in July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  10 54.58   18 16.2   2.077   1.985    70   14.6  21:03 ( 89, 35)  
June 26  10 54.12   17 11.7   2.296   2.069    64   15.0  21:04 ( 92, 28)

* C/2018 U1 ( Lemmon )

Now it is 14.6 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). It stays at 14-15 mag for a long time from 2021 to 2022. It stays observable in good condition after this while brightening gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  17 18.34   -3 43.9   4.142   5.103   158   14.7  23:26 (  0, 51)  
June 26  17 10.29   -4 39.2   4.153   5.092   155   14.7  22:51 (  0, 50)

* C/2020 F5 ( MASTER )

Now it is 14.8 mag (June 13, Thomas Lehmann). It stays 14-15 mag until the end of 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  23 43.63  -34 38.2   4.023   4.385   104   14.7   2:58 (324,  9)  
June 26  23 43.71  -34 28.5   3.944   4.395   109   14.7   3:01 (330, 13)

* C/2019 T2 ( Lemmon )

It will brighten up to 14.5 mag from spring to summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   5 17.56  -68 43.7   2.477   2.715    92   14.7   2:58 (336,-46)  
June 26   6 11.50  -68 24.7   2.505   2.732    91   14.8   3:01 (336,-48)

* C/2020 PV6 ( PanSTARRS )

Now it is 14.9 mag (June 14, Michael Jager). It will brighten up to 14 mag in summer, and it will be observable in excellent condition. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  21 14.30   21 26.1   1.962   2.538   113   15.1   2:58 (334, 75)  
June 26  20 54.00   24 28.1   1.849   2.507   119   14.8   2:39 (  0, 79)

* C/2019 N1 ( ATLAS )

It brightened up to 11.6 mag in winter (Feb. 18, Thomas Lehmann). Now it is fading. It has already faded down to 14.2 mag (May 11, Thomas Lehmann). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it will never be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   5  9.11  -52 32.2   3.063   2.993    76   15.0   2:58 (312,-48)  
June 26   5 14.55  -52 44.3   3.115   3.058    77   15.2   3:01 (312,-44)

* C/2021 A7 ( NEOWISE )

Now it is 14.2 mag (June 10, Thomas Lehmann). It stays 15 mag until summer. In the Southern Hemisphere, it stays observable in good condition until June. In the Northern Hemisphere, it is observable in the low sky from March to May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   8 35.83    5 26.0   2.599   1.994    43   15.1  21:03 ( 97,  0)  
June 26   8 49.07    7 29.8   2.660   1.982    39   15.1  21:04 (101, -2)

* C/2020 M5 ( ATLAS )

Now it is 15.6 mag (June 3, Michael Jager). In the Northern Hemisphere, it stays observable at 15-16 mag for a long time from spring to early 2022. In the Southern Hemisphere, it is not observable until the end of 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  12 50.39   71  1.2   3.211   3.066    72   15.3  21:03 (164, 51)  
June 26  12 36.75   67 34.4   3.245   3.053    70   15.3  21:04 (156, 50)

* 117P/Helin-Roman-Alu 1

Now it is 15.3 mag (June 6, Chris Wyatt). It will brighten up to 13 mag in 2022. In 2021, it is observable at 14-15 mag in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  12 59.58   -1 11.6   3.110   3.535   106   15.3  21:03 ( 43, 45)  
June 26  13  1.23   -1 41.5   3.192   3.520   100   15.4  21:04 ( 50, 40)

* 67P/Churyumov-Gerasimenko

Now it is 16.2 mag (June 13, Thomas Lehmann). It will brighten up to 9 mag, and will be observable in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   0  6.96   -3 40.2   1.744   1.980    87   15.8   2:58 (299, 29)  
June 26   0 20.30   -2 19.7   1.624   1.924    90   15.5   3:01 (301, 33)

* C/2020 O2 ( Amaral )

Now it is 15.1 mag (June 8, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 15-16 mag in good condition until autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  16 52.92  -21  9.3   3.899   4.893   166   15.5  23:01 (  0, 34)  
June 26  16 47.90  -19 57.2   3.927   4.887   158   15.6  22:29 (  0, 35)

* 201P/LONEOS

It has not been observed yet in this apparition. The condition of this apparition is bad. It must have brightened up to 15.5 mag in spring, however, it is not observable until autumn when it becomes fainter than 19 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   5 37.32   26  9.7   2.263   1.251     3   15.7   2:58 (223,-14)  
June 26   6  5.62   26 25.1   2.285   1.274     4   15.9   3:01 (223,-14)

* C/2020 Y2 ( ATLAS )

Now it is 15.7 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13 mag in 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays observable until June, but it will not be observable at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  12  7.63  -20 24.3   4.299   4.616   101   15.8  21:03 ( 42, 22)  
June 26  12  4.64  -20 28.8   4.371   4.571    94   15.8  21:04 ( 48, 17)

* C/2020 H6 ( ATLAS )

Now it is 15.7 mag (May 27, ATLAS-HKO, Haleakala). It stays observable at 16 mag from 2021 to 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  13 38.04   -2 44.9   4.243   4.775   115   15.8  21:03 ( 29, 48)  
June 26  13 37.48   -1 47.7   4.341   4.765   108   15.9  21:04 ( 39, 46)

* C/2018 N2 ( ASASSN )

Now it is 15.7 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. In the Southern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  13 36.39   62  2.4   6.193   6.116    80   15.9  21:03 (161, 60)  
June 26  13 33.12   60 40.5   6.289   6.164    78   15.9  21:04 (154, 59)

* C/2020 S3 ( Erasmus )

It brightened up to 3 mag in December in the SOHO spacecraft images (Dec. 18, Hirohisa Sato). Now it is 15.6 mag (June 15, Michael Jager). It stays observable in good condition after this while the comet will be fading. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   0 20.18   18 24.3   3.347   3.256    76   16.0   2:58 (275, 40)  
June 26   0 21.31   18 56.0   3.328   3.343    82   16.1   3:01 (279, 46)

* 106P/Schuster

Now it is 16.4 mag (May 23, Slooh.com Chile Observatory, La Dehesa). It will brighten up to 15 mag from summer to autumn. In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it will be getting higher gradually after this, and it will be observable in good condition after summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   2 28.99    3 20.4   2.069   1.659    52   16.2   2:58 (270,  6)  
June 26   2 47.21    5 32.1   2.009   1.632    53   16.0   3:01 (270,  9)

* C/2019 K7 ( Smith )

Now it is 16.7 mag (June 14, Michael Jager). It stays 15-16 mag until July. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable after this in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  17 54.56   57 19.0   5.094   5.352    99   16.1   0:07 (180, 68)  
June 26  17 40.98   57 43.4   5.137   5.382    98   16.1  23:20 (180, 67)

* C/2019 U5 ( PanSTARRS )

Now it is 16.6 mag (June 7, Katsumi Yoshimoto). 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. It locates extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  17 19.14   50 56.0   6.225   6.567   105   16.2  23:26 (180, 74)  
June 26  17  9.45   50 43.8   6.196   6.522   104   16.2  22:49 (180, 74)

* C/2017 T2 ( PanSTARRS )

It had been observed as 8-9 mag for a long time in 2020. Now it is fading. It has already faded down to 17.0 mag (May 25, ATLAS-MLO, Mauna Loa). It will be observable in good condition after this in the Southern Hemisphere. It locates extremely low after this in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  16 38.37  -46 35.2   4.029   4.955   152   16.2  22:47 (  0,  8)  
June 26  16 31.24  -46 37.9   4.124   5.017   148   16.3  22:12 (  0,  8)

* 284P/McNaught

Now it is 17.9 mag (June 8, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 15 mag from summer to autumn, and it will be observable in good condition. However, it is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  22 57.06   -5 12.4   1.908   2.371   104   16.4   2:58 (316, 40)  
June 26  23  3.76   -5  4.6   1.820   2.359   109   16.3   3:01 (322, 43)

* C/2021 A1 ( Leonard )

Now it is 16.9 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It will approach to Earth down to 0.2 a.u. in December, and it is expected to brighten up to 4 mag. In the Northern Hemisphere, it stays observable in good condition for a long time until December while the comet is brightening gradually. In the Southern Hemisphere, it is not observable until mid December. Actually, it is somewhat fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  10 30.12   53 50.4   3.631   3.238    59   16.4  21:03 (134, 41)  
June 26  10 28.46   52 31.5   3.624   3.153    55   16.3  21:04 (133, 37)

* 17P/Holmes

Now it is 15.1 mag (May 24, Mike Olason). Appearing in the morning sky. In the Northern Hemisphere, it stays observable in good condition while the comet will be fading. In the Southern Hemipsphere, it stays locating extremely low after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   2 55.64   30 46.2   2.967   2.272    39   16.3   2:58 (243, 15)  
June 26   3 10.18   32 10.4   2.940   2.293    42   16.5   3:01 (243, 19)

* C/2019 O3 ( Palomar )

Now it is 16.6 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It stays at 16-17 mag from 2020 to 2021. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  19 21.55   49 54.6   8.540   8.840   103   16.3   1:33 (180, 75)  
June 26  19 16.27   50 28.5   8.523   8.842   105   16.3   1:01 (180, 75)

* C/2019 T3 ( ATLAS )

Now it is 16.7 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16 mag from 2020 to 2021. In the Southern Hemisphere, it is not observable until summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  23 15.12   44 59.1   6.097   5.995    79   16.4   2:58 (239, 60)  
June 26  23 12.17   45  9.6   6.013   6.002    84   16.4   3:01 (236, 66)

* C/2021 K1 ( ATLAS )

Now it is 16.2 mag (May 30, ATLAS-MLO, Mauna Loa). It stays 16.5 mag until August and stays observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   0 20.50   -3 52.1   2.423   2.537    84   16.4   2:58 (296, 27)  
June 26   0 29.94   -3 45.4   2.357   2.549    88   16.4   3:01 (300, 31)

* 57P/du Toit-Neujmin-Delporte

Now it is 17.5 mag (June 8, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15.5 mag from summer to autumn. It stays observable for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  15  7.12  -13  4.8   1.146   2.033   140   16.6  21:16 (  0, 42)  
June 26  15  5.67  -12 59.6   1.164   2.002   133   16.5  21:04 (  6, 42)

* C/2017 Y2 ( PanSTARRS )

Now it is 16.0 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16.5 mag from spring in 2020 to summer in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  16  1.79  -18 45.2   4.033   4.969   154   16.6  22:10 (  0, 36)  
June 26  15 52.57  -19  9.2   4.116   4.989   145   16.6  21:33 (  0, 36)

* 6P/d'Arrest

Now it is 16.4 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). It will brighten very rapidly, and it will be observable at 10 mag in good condition from October to December. In the Northern Hemisphere, it locates somewhat low at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  16 21.10   17 12.2   0.821   1.692   133   16.7  22:29 (  0, 72)  
June 26  16 15.91   16  4.6   0.797   1.649   130   16.6  21:57 (  0, 71)

* C/2020 R7 ( ATLAS )

Now it is 17.1 mag (June 13, Thomas Lehmann). It will brighten up to 12.5 mag in 2022 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 in 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   3 36.44  -44 49.2   5.361   5.186    74   16.8   2:58 (305,-32)  
June 26   3 40.84  -45 47.3   5.253   5.137    77   16.7   3:01 (308,-28)

* C/2020 V2 ( ZTF )

Now it is 16.3 mag (June 8, Toshihiko Ikemura, Hirohisa Sato). 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 extremely low until mid July, then it becomes unobservable for a while. But it becomes observable in good condition after 2023 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  12  2.18   38  9.4   7.165   7.025    78   16.7  21:03 (108, 56)  
June 26  12  1.16   37 50.2   7.209   6.972    72   16.7  21:04 (109, 50)

* 28P/Neujmin 1

Now it is 16.3 mag (May 23, Mike Olason). Appearing in the morning sky. In the Northern Hemisphere, it stays observable in good condition after this while the comet will be fading. In the Southern Hemisphere, it stays locating extremely low for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   2 55.71   24 22.8   2.632   1.960    39   16.7   2:58 (249, 12)  
June 26   3 10.68   25 57.4   2.634   2.007    42   16.8   3:01 (249, 16)

* C/2020 K1 ( PanSTARRS )

Now it is 16.9 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it is observable in good condition in 2021. But it is observable only until November in 2022. In the Southern Hemisphere, it locates extremely low in 2021. But it will be observable in good condition at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  18 13.02   46 20.7   6.413   6.828   110   17.0   0:25 (180, 79)  
June 26  18  7.00   46  2.1   6.356   6.780   110   17.0  23:47 (180, 79)

* 108P/Ciffreo

Now it is 18 mag (June 10, Jean-Louis Virlichie). It will brighten rapidly up to 15 mag in autumn. It will be observable in excellent 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)  
June 19   1 59.19    4 11.7   2.159   1.848    58   17.3   2:58 (273, 12)  
June 26   2 15.65    5 55.4   2.083   1.820    60   17.1   3:01 (274, 16)

* C/2017 U7 ( PanSTARRS )

Now it is 16.8 mag (June 10, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  17 35.21  -13  1.3   6.728   7.728   169   17.1  23:43 (  0, 42)  
June 26  17 29.64  -12 42.2   6.771   7.753   164   17.2  23:10 (  0, 42)

* C/2021 D2 ( ZTF )

Now it is 17.6 mag (June 7, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15.5 mag in winter. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable at all in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  20 49.37   64 43.5   3.654   3.711    85   17.2   2:58 (181, 60)  
June 26  20 36.21   67 10.6   3.601   3.671    85   17.1   2:20 (180, 58)

* 22P/Kopff

Now it is 17.8 mag (June 8, Thomas Lehmann). It will be observable at 11 mag from winter to spring in 2022. In 2021, it is observable until July or August when it brightens up to 16-17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  10 42.38   12 11.5   3.040   2.854    69   17.3  21:03 ( 84, 29)  
June 26  10 48.92   11 28.7   3.088   2.813    64   17.2  21:04 ( 87, 24)

* P/2014 W12 ( Gibbs )

First return of a new periodic comet observed at 17 mag in 2014. It has not been observed yet in this apparition. It is expected to brighten up to 17 mag from summer to autumn, and it will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   0 35.36    9 34.9   1.603   1.675    75   17.3   2:58 (282, 32)  
June 26   0 50.48   11 52.5   1.557   1.676    78   17.2   3:01 (282, 37)

* 193P/LINEAR-NEAT

Now it is 18.8 mag (June 9, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15-16 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)  
June 19  23 14.42   -8 52.1   1.784   2.223   101   17.4   2:58 (314, 34)  
June 26  23 21.04   -7 43.6   1.700   2.212   106   17.2   3:01 (319, 38)

* 413P/2020 W4 ( Larson )

First return of a new periodic comet which brightened up to 16 mag in 2014. Now it is 16.9 mag (June 5, Thomas Lehmann). It stays observable at 16-17 mag in good condition until July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  12 24.07   -0 32.5   1.761   2.153    98   17.2  21:03 ( 53, 40)  
June 26  12 30.64   -2 14.6   1.830   2.148    93   17.3  21:04 ( 56, 35)

* C/2020 F2 ( ATLAS )

Now it is 17.2 mag (May 14, Michael Jager). 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)  
June 19  14 34.86   -6 30.7   8.415   9.105   130   17.3  21:03 (  7, 48)  
June 26  14 31.60   -6 14.6   8.503   9.095   122   17.3  21:04 ( 19, 47)

* C/2021 E3 ( ZTF )

Now it is 17.4 mag (June 8, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag from spring to summer in 2022. In the Southen Hemisphere, it locates somewhat low in 2021, but it will be observable in good condition at the high light for a long time. In the Northern Hemisphere, it is observable in good condition in 2021, but it will not be observable at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  20 38.43   38  7.2   4.043   4.446   106   17.5   2:50 (180, 87)  
June 26  20 30.83   38 14.6   3.914   4.383   111   17.4   2:15 (180, 87)

* C/2020 S8 ( Lemmon )

It brightened rapidly up to 15.5 mag in April (Apr. 5, Sandor Szabo). Now it is fading. It has already fade down to 17.3 mag (May 30, ATLAS-MLO, Mauna Loa). It will be fainter than 18 mag in July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  11 42.59   -4 47.9   2.263   2.485    90   17.4  21:03 ( 59, 30)  
June 26  11 37.64   -6 28.2   2.418   2.510    83   17.6  21:04 ( 64, 23)

* C/2020 T4 ( PanSTARRS )

In the Northern Hemisphere, it is observable at 17-18 mag from spring to autumn. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   4 31.68   73 42.2   2.686   2.200    51   17.6   2:58 (196, 27)  
June 26   5 25.69   76 30.8   2.640   2.195    53   17.5   3:01 (193, 27)

* 19P/Borrelly

It has not been observed yet in this apparition. It will brighten rapidly up to 9 mag in winter. It will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  23 36.46  -37 58.2   2.205   2.679   106   17.9   2:58 (328,  7)  
June 26  23 44.82  -39  4.1   2.090   2.629   110   17.6   3:01 (332,  9)

* C/2020 F7 ( Lemmon )

Now it is 17.7 mag (May 12, ATLAS-HKO, Haleakala). It brightened rapidly. It stays 17-18 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 is observable only until May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   8 23.42   -9 29.5   6.042   5.444    49   17.6  21:03 ( 86,-12)  
June 26   8 25.94   -9 60.0   6.096   5.434    45   17.6  21:04 ( 90,-17)

* 152P/Helin-Lawrence

Now it is 17.5 mag (June 14, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in 2022. In 2021, it stays observable at 18 mag until September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  13 20.05    2  6.4   2.804   3.289   109   17.7  21:03 ( 39, 50)  
June 26  13 21.76    1 27.2   2.883   3.277   103   17.7  21:04 ( 47, 46)

* 418P/2020 Y5 ( LINEAR )

First return of a new periodic comet which brightened up to 14 mag in 2010. Now it is 18.7 mag (Apr. 14, Toshihiko Ikemura, Hirohisa Sato). The condition is bad in this apparition. It is observable only until June in the Northern Hemisphere when it brightens up to 18 mag, or until August in the Southern Hemisphere when it brightens up to 17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   9 32.55    9 51.0   2.533   2.116    54   17.8  21:03 ( 92, 13)  
June 26   9 45.09    8 49.7   2.553   2.076    51   17.7  21:04 ( 94, 10)

* C/2017 B3 ( LINEAR )

It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, 2019, Chris Wyatt). Now it is fading slowly. It stays 18 mag until autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   0 48.78   18 19.1   8.242   7.947    69   17.9   2:58 (271, 34)  
June 26   0 49.65   18 50.7   8.178   7.990    75   17.9   3:01 (274, 41)

* 99P/Kowal 1

Now it is 17.9 mag (June 11, Thomas Lehmann). It stays 17-18 mag for a long time from 2021 to 2023. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  10 50.90   10  0.1   5.043   4.837    72   17.9  21:03 ( 81, 29)  
June 26  10 54.90    9 29.9   5.136   4.832    67   17.9  21:04 ( 84, 24)

* 119P/Parker-Hartley

Now it is 20 mag (May 28, Giuseppe Pappa). It will brighten up to 14.5 mag in 2022 winter. In 2021, it stays observable in good condition while the comet will be brightening gradually. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  23  2.73  -12  7.9   3.068   3.479   105   18.1   2:58 (319, 33)  
June 26  23  5.34  -12 11.3   2.949   3.453   111   17.9   3:01 (326, 36)

* C/2016 Q2 ( PanSTARRS )

Now it is 18.6 mag (May 14, Michael Jager). In the Northern Hemisphere, it stays observable at 18 mag for a long time from 2021 to 2022. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19  16 50.22   56 26.2   6.853   7.086    99   17.9  22:57 (180, 69)  
June 26  16 39.92   56 21.0   6.882   7.088    97   17.9  22:19 (180, 69)

* C/2020 K5 ( PanSTARRS )

It was expected to brighten up to 13 mag from spring to summer. But actually, it is extremely faint as 19.0 mag (Mar. 22, A. C. Gilmore, P. M. Kilmartin). In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until late August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 19   4 11.33  -37  2.4   1.678   1.547    64   19.1   2:58 (294,-35)  
June 26   4 34.90  -34 49.6   1.729   1.562    63   19.2   3:01 (292,-33)

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