Weekly Information about Bright Comets (2020 June 20: South)

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 Updated on June 21, 2020
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* C/2020 F3 ( NEOWISE )

Now it is very bright as 6.8 mag (June 10, Michael Mattiazzo). It will approach to Sun down to 0.3 a.u. on July 3, and it is expected to brighten up to 2.5 mag. Now it is not observable. It will appear in the evening sky at 3-4 mag in mid July in the Northern Hemisphere, or at 5-6 mag in late July in the Southern Hemisphere. Then it stays observable while getting fainter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5 58.31   12 58.0   1.467   0.504    10    5.4  18:26 ( 98,-12)  
June 27   5 55.23   20 40.1   1.346   0.361     7    3.7   5:38 (253,-11)

* C/2019 U6 ( Lemmon )

Now it is very bright as 6.2 mag (June 20, Marco Goiato). It will be fading after July. In the Southern Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it will appear in the evening sky soon. Then it becomes observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9  4.51  -10 55.3   0.858   0.914    57    5.4  18:26 (107, 40)  
June 27   9 56.01   -5 33.5   0.828   0.926    59    5.4  18:28 (117, 41)

* 2P/Encke

It will approach to Sun down to 0.34 a.u. and brighten up to 7 mag in June. In the Southern Hemisphere, it will appear in the evening sky at 7 mag in early July. Then it stays observable in good condition while the comet will be fading. In the Northern Hemisphere, it is not observable until mid August when the comet will fade down to 12 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6 35.56   24 51.7   1.336   0.372     9    7.9  18:26 (113,-11)  
June 27   7 33.24   20 51.0   1.161   0.338    16    7.3  18:28 (113, -3)

* C/2017 T2 ( PanSTARRS )

Now it is 9.2 mag (July 20, Marco Goiato). It stays bright as 8-9 mag until July. It is observable in good condition in the Northern Hemisphere. It will be observable after late June also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12  3.73   50 25.2   1.718   1.730    73    8.4  18:26 (177,  5)  
June 27  12 21.55   44 48.9   1.763   1.765    73    8.6  18:28 (175, 10)

* 249P/LINEAR

Now it is 15.5 mag (June 2, SONEAR Observatory, Oliveira). It was expected to brighten rapidly up to 9.5 mag in June. But actually, it is much fainter than expected. It has finally started brightening in late May. It is not observable in June. It will be observable in good condition after July while the comet will be fading. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5 47.21   28 17.6   0.481   0.539     5    9.6   5:36 (248,-19)  
June 27   5  8.71   28 58.2   0.577   0.500    17    9.5   5:38 (239, -7)

* 58P/Jackson-Neujmin

Recovered from SWAN images after 24-year blank. Now it is very bright as 10.2 mag (May 31, Marco Goiato). It stays 10-11 mag until August. In the Southern Hemisphere, it stays observable in the morning sky for a long time. In the Northern Hemisphere, it is too low to observe until July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   3  2.96   11 12.7   1.973   1.406    42   10.2   5:36 (238, 22)  
June 27   3 25.47   11 58.1   1.971   1.424    43   10.3   5:38 (236, 22)

* C/2020 F8 ( SWAN )

It brightened up to 4.7 mag in early May (May 2, Marco Goiato). However, it is fading and getting diffused after that. It has already faded down to 7.3 mag (May 21, Mitsunori Tsumura). It is not observable until August after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6  1.96   36  2.4   1.678   0.723    12   10.4  18:26 (119,-23)  
June 27   6 11.24   32 56.8   1.834   0.852    10   11.3   5:38 (243,-21)

* 88P/Howell

Now it is 11.6 mag (June 20, Marco Goiato). Brightening very rapidly. It will brighten up to 8-9 mag from summer to autumn. It will be observable in excellent condition in the Southern Hemisphere. It locates very low around the high light in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 45.76   -3 46.4   1.168   1.713   103   11.5  18:50 (180, 59)  
June 27  12 51.65   -4 50.8   1.189   1.672    98   11.2  18:29 (180, 60)

* C/2019 N1 ( ATLAS )

Now it is 14.6 mag (June 1, Thomas Lehmann). It will brighten up to 10.5 mag from 2020 December to 2021 January. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually, but it is not observable at the high light. In the Southern Hemisphere, it is not observable for a long time, but it will be observable in good condition after the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  11 59.47   62 21.3   2.854   2.680    69   13.1  18:26 (177, -7)  
June 27  11 57.38   58 39.8   2.845   2.618    66   12.9  18:28 (173, -4)

* C/2019 Y1 ( ATLAS )

It brightened up to 8 mag from March to April. It continued brightening for a while even after the perihelion passage on Mar. 15. But it is fading now. It has already faded down to 13.5 mag (June 14, Paul Camilleri). It stays observable for a long time in the Northern Hemisphere. It is observable in the evening sky after this also in the Southern Hemisphere. It seems to be a fragment of C/1988 A1 (Liller), like C/1996 Q1 (Tabur) and C/2015 F3 (SWAN). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  11 56.81   30 42.7   1.743   1.837    78   13.3  18:26 (174, 24)  
June 27  12  4.62   25 52.0   1.905   1.929    75   13.9  18:28 (168, 29)

* 29P/Schwassmann-Wachmann 1

Appearing in the morning sky. Now it is 14.9 mag (May 27, Slooh.com Canary Islands Observatory). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   2 25.35   23 13.7   6.441   5.808    47   13.8   5:36 (222, 18)  
June 27   2 29.86   23 42.4   6.359   5.809    53   13.7   5:38 (217, 21)

* C/2018 N2 ( ASASSN )

Now it is 13.5 mag (May 17, Thomas Lehmann). It stays 14 mag until autumn. 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 20   2 48.66   77 52.0   4.206   3.778    58   14.0   5:36 (190,-27)  
June 27   3 17.86   80  5.3   4.218   3.814    60   14.1   5:38 (189,-28)

* 246P/NEAT

Now it is 14.0 mag (June 14, Paul Camilleri). It stays 13-14 mag from 2020 to 2021. It stays observable in good condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 35.21   12  2.5   2.906   3.149    94   14.2  18:40 (180, 43)  
June 27  12 38.54   10 56.8   2.984   3.134    88   14.2  18:28 (176, 44)

* C/2019 F1 ( ATLAS-Africano )

Now it is 15.0 mag (June 16, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2021. In 2020, it is observable at 15 mag in good condition from spring to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  13 56.51  -22  5.4   4.184   4.844   125   15.0  20:00 (180, 77)  
June 27  13 53.87  -22 25.6   4.238   4.805   118   15.0  19:30 (180, 78)

* C/2020 F5 ( MASTER )

Now it is 15.5 mag (June 6, iTelescope Observatory, Siding Spring). It stays 14-15 mag until 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 in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  14 44.88  -83 55.1   4.333   4.885   117   15.1  20:51 (  0, 41)  
June 27  14 33.95  -83 22.4   4.316   4.860   116   15.0  20:12 (  0, 42)

* C/2018 F4 ( PanSTARRS )

Now it is bright as 13.9 mag (Apr. 24, Chris Wyatt). It stays 15 mag until summer. It stays observable for a long time in the Southern Hemisphere. It is not observable until August in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   3 14.24  -35 20.3   4.123   3.894    70   15.1   5:36 (287, 45)  
June 27   3 17.73  -35  2.7   4.096   3.924    73   15.2   5:38 (285, 50)

* C/2017 K2 ( PanSTARRS )

Now it is 15.4 mag (June 1, Thomas Lehmann). 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 is only visible in the extremely low sky in summer in 2020. 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 20  17 40.86   53 17.8   8.618   8.905   103   15.2  23:43 (180,  2)  
June 27  17 35.67   53  4.7   8.572   8.854   102   15.1  23:11 (180,  2)

* C/2019 K7 ( Smith )

Now it is 15.1 mag (June 15, Toshihiko Ikemura, Hirohisa Sato). It stays 15-16 mag for a long time until 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 17.89   13 50.0   3.766   4.475   128   15.4   2:25 (180, 41)  
June 27  20  9.25   15  8.9   3.712   4.476   133   15.4   1:49 (180, 40)

* C/2019 Y4 ( ATLAS )

Fragment of C/1844 Y1 (Great Comet). It brightened up to 7.0 mag in late March ((Mar. 30, Charles S. Morris). But the nucleus was split into some fragments, and it faded out after that. It was 9.1 mag in mid May (May 17, Sandor Szabo). It approached to Sun down to 0.25 a.u. on May 31. In the Northern Hemisphere, it is not observable after this. In the Southern Hemisphere, it appears in the morning sky in late June, but it locates extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   5  4.58    4 35.4   1.460   0.649    22   15.4   5:36 (262,  3)  
June 27   5 27.95    3 41.6   1.627   0.810    23   16.6   5:38 (262,  4)

* 115P/Maury

Now it is 16.3 mag (June 2, ATLAS-HKO, Haleakala). It will brighten up to 15-16 mag from June to August, and it will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  19 24.59   -0 59.3   1.149   2.085   148   15.6   1:32 (180, 56)  
June 27  19 22.66   -0 51.0   1.117   2.076   153   15.5   1:02 (180, 56)

* C/2020 J1 ( SONEAR )

Now it is 16.4 mag (June 2, J. L. Virlichie, P. Traverse). It will brighten up to 13.5 mag in spring in 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until spring in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  22 10.55  -59 10.7   3.711   4.352   123   15.7   4:18 (  0, 66)  
June 27  21 55.62  -61  3.5   3.614   4.314   127   15.6   3:36 (  0, 64)

* C/2020 H4 ( Leonard )

Now it is very faint as 18-19 mag (June 16, Alan Hale). It was expected to brighten very rapidly, and brighten up to 14.5 mag from August to September. But actually, it is much fainter than predicted. In the Northern Hemisphere, it stays observable for a long time, although it becomes extremely low in early September. In the Southern Hemisphere, it is not observable until late October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  22 55.33   49 24.2   1.275   1.508    81   16.3   5:01 (180,  6)  
June 27  23  5.93   59 19.8   1.201   1.424    79   15.9   4:44 (180, -4)

* C/2019 L3 ( ATLAS )

Now it is 15.3 mag (June 15, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 12 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2021 November. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 36.97   54  4.6   6.402   6.046    65   16.0   5:36 (190,  0)  
June 27   0 41.45   55  7.4   6.297   6.002    68   16.0   5:38 (186, -1)

* C/2018 U1 ( Lemmon )

Now it is 16.4 mag (June 16, Toshihiko Ikemura, Hirohisa Sato). It will stay at 15 mag for a long time from 2021 to 2022. In the Northern Hemisphere, it stays observable in good condition while brightening gradually. In the Southern Hemisphere, it stays locating low for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  18 29.16   33 51.8   5.660   6.260   122   16.2   0:36 (180, 21)  
June 27  18 22.13   33 23.4   5.613   6.230   123   16.2   0:02 (180, 22)

* C/2017 B3 ( LINEAR )

It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, Chris Wyatt). Now it is fading slowly. Now it is 16.0 mag (June 4, ATLAS-MLO, Mauna Loa). In 2020, it stays observable in good condition while the comet will be fading from 16 to 17 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 39.12   -1 31.3   5.831   5.751    80   16.3   5:36 (209, 53)  
June 27   0 39.98   -1  1.7   5.759   5.791    86   16.4   5:38 (198, 55)

* 17P/Holmes

Now it is 18.6 mag (June 2, J. L. Virlichie, P. Traverse). It brightens up to 13.5 mag in winter. But it is not observable at high light. In the Southern Hemisphere, it stays observable in good condition until autumn when the comet will brighten up to 14 mag. It stays locating very low in the Northern Hemisphere. It is fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  18 38.43  -47  7.6   1.787   2.741   154   16.6   0:47 (  0, 78)  
June 27  18 30.20  -46 57.6   1.750   2.712   156   16.4   0:11 (  0, 78)

* C/2018 A6 ( Gibbs )

It brightened up to 13.2 mag from spring to autumn in 2019 (June 30, Thomas Lehmann). Now it is fading slowly. It has already faded down to 16.3 mag (June 7, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it stays low for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   0 10.46  -30 12.9   3.920   4.191    98   16.5   5:36 (243, 80)  
June 27   0  8.44  -30 14.0   3.856   4.230   104   16.5   5:38 (203, 85)

* C/2017 U7 ( PanSTARRS )

Now it is 15.6 mag (May 22, ATLAS-MLO, Mauna Loa). It is observable at 16 mag in 2020. It is observable in excellent condition 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 20  19 19.33  -29 36.6   5.731   6.695   160   16.6   1:27 (180, 85)  
June 27  19 11.50  -29 28.7   5.712   6.709   167   16.6   0:52 (180, 84)

* C/2017 Y2 ( PanSTARRS )

Now it is 16.8 mag (May 28, Toshihiko Ikemura, Hirohisa Sato). It will be observable at 16.5-17 mag from spring in 2020 to summer in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  18 56.49   23 26.3   4.034   4.760   130   16.7   1:04 (180, 32)  
June 27  18 45.82   22 49.5   3.990   4.748   133   16.6   0:26 (180, 32)

* 257P/Catalina

Now it is 17.1 mag (May 19, ATLAS-MLO, Mauna Loa). It will brighten up to 16.5 mag and will be observable in good condition from June to October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 35.99   13 53.4   1.482   2.234   125   16.8   2:43 (180, 41)  
June 27  20 35.86   15  6.9   1.426   2.220   129   16.7   2:15 (180, 40)

* C/2019 C1 ( ATLAS )

Now it is 16.8 mag (June 10, ATLAS-HKO, Haleakala). It stays observable at 16-17 mag from 2020 to 2021. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  10 55.76  -15 34.2   6.632   6.588    83   16.8  18:26 (130, 63)  
June 27  10 59.37  -15 17.8   6.735   6.591    77   16.8  18:28 (121, 58)

* C/2019 T4 ( ATLAS )

Now it is 17.4 mag (May 9, P. Camilleri, H. Williams, J. Oey). It is expected to brighten up to 13 mag in 2022. In 2020, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is not observable. It will be observable from autumn to winter, but it locating extremely low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   6 57.28  -25 25.6   7.668   7.075    51   16.9  18:26 ( 73, 21)  
June 27   7  2.68  -25 22.4   7.651   7.035    49   16.9  18:28 ( 70, 17)

* C/2020 K3 ( Leonard )

Now it is 17.3 mag (June 15, Toshihiko Ikemura, Hirohisa Sato). It brightens up to 17 mag from June to July. It is observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  23  4.12   56 32.7   1.504   1.619    77   17.0   5:11 (180, -2)  
June 27  22 13.78   62 18.3   1.413   1.638    83   16.9   3:54 (180, -7)

* C/2020 K8 ( Catalina-ATLAS )

Now it is 17.6 mag (June 16, Toshihiko Ikemura, Hirohisa Sato). Small comet. But it will approach to Sun down to 0.47 a.u. in September, and it is expected to brighten up to 11 mag. It stays observable in good condition until late August while the comet will be brightening up to 11 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  23 39.52   21 21.3   1.573   1.797    85   17.5   5:36 (183, 34)  
June 27  23 57.01   23 13.6   1.405   1.687    86   17.0   5:35 (180, 32)

* 162P/Siding Spring

Now it is 17.7 mag (June 13, J. L. Virlichie, P. Traverse). It brightens up to 16 mag from summer to winter. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is not observable until late October. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  22 14.34  -57 54.2   1.460   2.186   122   17.3   4:21 (  0, 67)  
June 27  22 21.71  -59 45.1   1.383   2.138   125   17.1   4:01 (  0, 65)

* C/2020 H2 ( Pruyne )

It brightened up to 13.2 mag from April to May (Apr. 28, Alan Hale). Now it is fading rapidly. It has already faded down to 17.8 mag (June 8, Hidetaka Sato). It will be fainter than 18 mag soon. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9 19.24   55 45.5   1.676   1.271    49   17.2  18:26 (156, -8)  
June 27   9 27.63   52 34.2   1.867   1.361    45   17.7  18:28 (152, -8)

* C/2020 F2 ( ATLAS )

Now it is 17.7 mag (May 26, ATLAS-MLO, Mauna Loa). It stays observable at 16-17 mag for a long time until 2024. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  15 40.35  -16  6.3   8.958   9.830   147   17.2  21:44 (180, 71)  
June 27  15 36.64  -15 49.6   9.013   9.813   139   17.2  21:13 (180, 71)

* C/2017 M4 ( ATLAS )

It brightened up to 12-13 mag from 2018 to 2019. Now it is fading. It has already faded down to 17.1 mag (June 2, J. L. Virlichie, P. Traverse). In the Southern Hemisphere, it stays observable in good condition for a long time. It will never be observable after this in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   9 17.71  -59 50.1   5.530   5.674    92   17.3  18:26 ( 35, 51)  
June 27   9 20.56  -58 55.9   5.631   5.721    89   17.3  18:28 ( 38, 48)

* 278P/McNaught

Now it is 17.1 mag (June 10, ATLAS-HKO, Haleakala). It became brighter than orignally predicted. It stays observable at 17 mag in good condition until autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 48.96   -9 25.6   1.676   2.187   106   17.3  18:54 (180, 65)  
June 27  12 54.90  -10 13.7   1.734   2.172   101   17.3  18:32 (180, 65)

* C/2014 F3 ( Sheppard-Trujillo )

It will pass the perihelion in 2021, and it is predicted to be observable at 17-18 mag from 2020 to 2022. However, it has not been observed at all since 2015. It was not detected, fainter than 20.5 mag, in 2017 May (Werner Hasubick). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  20 39.01  -21 56.6   5.158   5.994   142   17.3   2:46 (180, 77)  
June 27  20 37.31  -22  0.9   5.085   5.982   149   17.3   2:17 (180, 77)

* C/2019 T3 ( ATLAS )

Now it is 17.3 mag (Apr. 23, D. Buczynski). It will be observable at 16.5-17 mag from 2020 to 2021. In the Southern Hemisphere, it is not observable until summer in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20   2  5.02   69 24.1   6.707   6.212    56   17.4   5:36 (193,-18)  
June 27   2  4.95   69 59.2   6.650   6.198    59   17.4   5:38 (191,-18)

* 87P/Bus

Now it is 17.8 mag (June 14, Charles S. Morris). It will fade out after this, and will be fainter than 18 mag in July. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 59.56   -3 55.0   1.599   2.122   106   17.4  19:04 (180, 59)  
June 27  13  7.39   -4 42.5   1.676   2.130   101   17.5  18:45 (180, 60)

* P/2019 LM4 ( Palomar )

It brigthened up to 16.5 mag in May (May 14, R. Ligustir). It is fading rapidly after that. It has already faded down to 18.8 mag (June 16, Toshihiko Ikemura, Hirohisa Sato). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  15  0.99    0  9.9   2.971   3.725   131   17.5  21:05 (180, 55)  
June 27  14 58.43   -0 48.0   3.081   3.761   125   17.6  20:35 (180, 56)

* 28P/Neujmin 1

Now it is 17.1 mag (May 30, ATLAS-MLO, Mauna Loa). It will brighten up to 15.5 mag in early 2021. In 2020, it stays observable at 17 mag until November in the Southern Hemisphere, or until July in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  14  0.36  -30 30.6   2.511   3.236   127   17.6  20:04 (180, 86)  
June 27  13 58.50  -30  0.8   2.534   3.181   121   17.6  19:35 (180, 85)

* C/2017 K5 ( PanSTARRS )

Now it is 19.9 mag (May 29, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 18 mag for a long time from 2019 to 2021. However, it is much fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  18 59.72  -19 58.3   6.714   7.698   164   17.6   1:07 (180, 75)  
June 27  18 56.03  -20 34.4   6.693   7.701   172   17.6   0:36 (180, 76)

* C/2010 U3 ( Boattini )

Now it is 17.6 mag (May 28, Hiroshi Abe). It will be fading slowly after this. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is observable in the extremely low sky only in 2021 spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  12 37.12   49 29.7   9.045   8.904    78   17.6  18:41 (180,  6)  
June 27  12 37.65   48 37.5   9.129   8.917    74   17.7  18:28 (178,  6)

* 210P/Christensen

It brightened up to 10.8 mag (Apr. 20, Sandor Szabo). Fading very rapidly. It has already fadeod dow to 15.8 mag (June 13, ATLAS-MLO, Mauna Loa). It will be fainter than 18 mag soon. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  10 30.05   19 27.1   1.545   1.421    63   17.8  18:26 (150, 30)  
June 27  10 53.84   16 52.6   1.672   1.514    63   18.4  18:28 (147, 32)

* P/2019 Y2 ( Fuls )

It brightened up to 15.9 mag in spring (Mar. 17, Purple Mountain Observatory, XuYi Station). Now it is fading. It has already faded down to 17.1 mag (May 23, ATLAS-MLO, Mauna Loa). It will be fainter than 18 mag in late June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  13 12.92   -3 26.2   1.810   2.349   109   17.8  19:17 (180, 59)  
June 27  13 18.55   -4 22.9   1.906   2.370   104   17.9  18:56 (180, 60)

* 117P/Helin-Roman-Alu 1

Now it is 17.8 mag (June 16, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2022. It will be unobservable temporarily in August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  10 28.21   17 55.4   4.684   4.328    63   17.8  18:26 (148, 31)  
June 27  10 33.05   17 16.2   4.761   4.314    58   17.8  18:28 (142, 28)

* A/2019 O3

Now it is 17.1 mag (May 24, ATLAS-MLO, Mauna Loa). It is observable at 17-18 mag in good condition in 2020 summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  19 43.52   30 11.7   8.391   8.948   120   17.8   1:50 (180, 25)  
June 27  19 39.72   30 43.9   8.347   8.941   122   17.8   1:19 (180, 24)

* 124P/Mrkos

It brightened up to 15.9 mag from February to March (Feb. 18, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 18.0 mag (May 31, P. Camilleri, H. Williams). It will be fainter than 18 mag in late June. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  11  0.73  -14 50.6   1.506   1.725    83   17.9  18:26 (133, 63)  
June 27  11 12.47  -17 16.5   1.581   1.745    81   18.0  18:28 (122, 62)

* A/2019 T2

Now it is 17.7 mag (June 17, Taras Prystavski). Taras Prystavski detected its cometary activity. It will brighten up to 15.5 mag from spring to summer in 2021. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is observable in good condition in 2020, however, it will be unobservable in 2021. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  23 22.22    9 54.9   3.880   4.070    93   18.0   5:29 (180, 45)  
June 27  23 21.42    9 14.0   3.709   4.020   100   17.9   5:00 (180, 46)

* 186P/Garradd

Now it is 18.6 mag (May 30, ATLAS-MLO, Mauna Loa). It stays 18-19 mag for a long time from 2018 to 2020. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 20  21  3.04  -34 34.1   3.737   4.541   137   17.9   3:10 (180, 89)  
June 27  20 59.66  -34 40.0   3.681   4.546   144   17.9   2:39 (180, 90)

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