Weekly Information about Bright Comets (2020 June 27: South)

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Updated on June 27, 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 visible in the image of SOHO spacecraft. It is very bright as 2.1 mag (June 26, Mieczyslaw Leszek Paradowski). It approaches to Sun down to 0.3 a.u. on July 3, and brightens up to 0-1 mag. Now it is not observable on the ground. It will appear in the evening sky at 3-4 mag in mid July in the Northern Hemisphere, or at 5 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 27   5 55.23   20 40.1   1.346   0.361     7    2.3   5:38 (253,-11)  
July  4   6  0.30   30 50.6   1.143   0.295    14    0.9   5:38 (241,-12)  

* C/2019 U6 ( Lemmon )

Now it is very bright as 6.5 mag (June 24, Marco Goiato). It will be fading after this. 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 27   9 56.01   -5 33.5   0.828   0.926    59    6.3  18:28 (117, 41)  
July  4  10 46.98    0 21.6   0.836   0.954    61    6.8  18:30 (127, 40)  

* 2P/Encke

It approaches to Sun down to 0.34 a.u. and now it is bright as 7 mag. But it is not observable now. In the Southern Hemisphere, it will appear in the evening sky at 7 mag soon. 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 27   7 33.24   20 51.0   1.161   0.338    16    7.3  18:28 (113, -3)  
July  4   8 25.43   15  7.9   0.974   0.401    23    7.5  18:30 (112,  5)  

* C/2017 T2 ( PanSTARRS )

Now it is 9.2 mag (July 20, Marco Goiato). It stays observable at 9-10 mag in the evening sky until September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 27  12 21.55   44 48.9   1.763   1.765    73    8.6  18:28 (175, 10)  
July  4  12 37.08   39 17.3   1.822   1.804    72    8.7  18:30 (171, 15)  

* 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 27   5  8.71   28 58.2   0.577   0.500    17    9.5   5:38 (239, -7)  
July  4   4 53.67   28 32.3   0.709   0.507    27   10.0   5:38 (234,  0)  

* 58P/Jackson-Neujmin

Recovered from SWAN images after 24-year blank. Now it is 11.1 mag (June 21, Paul Camilleri). 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 27   3 25.47   11 58.1   1.971   1.424    43   10.3   5:38 (236, 22)  
July  4   3 47.41   12 33.1   1.971   1.448    45   10.5   5:38 (234, 23)  

* 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 27  12 51.65   -4 50.8   1.189   1.672    98   11.2  18:29 (180, 60)  
July  4  12 59.25   -6  4.6   1.210   1.631    93   11.0  18:30 (169, 61)  

* 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 27   6 11.24   32 56.8   1.834   0.852    10   11.3   5:38 (243,-21)  
July  4   6 18.71   30 12.9   1.962   0.981    10   12.1   5:38 (244,-15)  

* C/2019 N1 ( ATLAS )

Now it is 14.8 mag (June 19, Katsumi Yoshimoto). It is expected to brighten up to 10.5 mag from December to 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. It is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 27  11 57.38   58 39.8   2.845   2.618    66   12.9  18:28 (173, -4)  
July  4  11 57.36   54 55.5   2.841   2.556    63   12.8  18:30 (168, -1)  

* 29P/Schwassmann-Wachmann 1

Appearing in the morning sky. Now it is not visible, fainter than 14.4 mag (June 21, Chris Wyatt).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 27   2 29.86   23 42.4   6.359   5.809    53   13.7   5:38 (217, 21)  
July  4   2 34.08   24 10.0   6.271   5.811    58   13.7   5:38 (212, 23)  

* 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 13.6 mag (June 21, Paul Camilleri). 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 27  12  4.63   25 52.0   1.905   1.929    75   13.9  18:28 (168, 29)  
July  4  12 12.01   21 39.9   2.073   2.021    72   14.4  18:30 (161, 31)  

* 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 27   3 17.86   80  5.3   4.218   3.814    60   14.1   5:38 (189,-28)  
July  4   3 59.15   82 10.8   4.231   3.852    61   14.1   5:38 (187,-30)  

* 246P/NEAT

Now it is 14.0 mag (June 21, 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 27  12 38.54   10 56.8   2.984   3.134    88   14.2  18:28 (176, 44)  
July  4  12 42.61    9 48.2   3.061   3.120    83   14.3  18:30 (167, 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 27  13 53.87  -22 25.6   4.238   4.805   118   15.0  19:30 (180, 78)  
July  4  13 51.98  -22 47.7   4.298   4.766   111   14.9  19:01 (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 27  14 33.95  -83 22.4   4.316   4.860   116   15.0  20:12 (  0, 42)  
July  4  14 29.29  -82 44.1   4.306   4.834   115   15.0  19:40 (  0, 42)  

* C/2017 K2 ( PanSTARRS )

Now it is 15.5 mag (June 19, Katsumi Yoshimoto). 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 27  17 35.67   53  4.7   8.572   8.854   102   15.1  23:11 (180,  2)  
July  4  17 30.61   52 45.2   8.531   8.803   102   15.1  22:38 (180,  2)  

* C/2018 F4 ( PanSTARRS )

Now it is 15.8 mag (June 14, SONEAR Observatory, Oliveira). 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 27   3 17.73  -35  2.7   4.096   3.924    73   15.2   5:38 (285, 50)  
July  4   3 20.62  -34 52.6   4.064   3.955    76   15.2   5:38 (283, 55)  

* 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 27  20  9.25   15  8.9   3.712   4.476   133   15.4   1:49 (180, 40)  
July  4  19 59.92   16 20.6   3.675   4.477   137   15.3   1:12 (180, 39)  

* 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 27  19 22.66   -0 51.0   1.117   2.076   153   15.5   1:02 (180, 56)  
July  4  19 20.04   -0 57.1   1.094   2.069   157   15.4   0:32 (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 27  21 55.60  -61  3.8   3.613   4.313   127   15.6   3:36 (  0, 64)  
July  4  21 36.54  -62 50.2   3.532   4.275   131   15.5   2:50 (  0, 62)  

* 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 27  23  5.93   59 19.8   1.201   1.424    79   15.9   4:44 (180, -4)  
July  4  23 23.62   69 56.8   1.160   1.342    75   15.6   4:34 (180,-15)  

* 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 27   0 41.45   55  7.4   6.297   6.002    68   16.0   5:38 (186, -1)  
July  4   0 45.47   56 10.5   6.189   5.957    72   15.9   5:38 (183, -1)  

* C/2018 U1 ( Lemmon )

Now it is 16.4 mag (June 19, Katsumi Yoshimoto). 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 27  18 22.13   33 23.4   5.613   6.230   123   16.2   0:02 (180, 22)  
July  4  18 15.10   32 45.9   5.578   6.199   123   16.2  23:23 (180, 22)  

* 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 27  18 30.20  -46 57.6   1.750   2.712   156   16.4   0:11 (  0, 78)  
July  4  18 21.70  -46 34.2   1.724   2.683   155   16.2  23:30 (  0, 78)  

* 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 20, Toshihiko Ikemura, Hirohisa Sato). 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 27   0 39.98   -1  1.7   5.759   5.791    86   16.4   5:38 (198, 55)  
July  4   0 40.34   -0 34.7   5.687   5.832    93   16.4   5:38 (186, 55)  

* 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 27  23 57.01   23 13.6   1.402   1.684    86   17.0   5:35 (180, 32)  
July  4   0 17.80   25 14.0   1.238   1.572    87   16.4   5:29 (180, 30)  

* 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 27   0  8.44  -30 14.0   3.856   4.230   104   16.5   5:38 (203, 85)  
July  4   0  5.47  -30 18.8   3.796   4.269   111   16.6   5:17 (180, 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 27  19 11.50  -29 28.7   5.712   6.709   167   16.6   0:52 (180, 84)  
July  4  19  3.56  -29 18.2   5.712   6.723   173   16.6   0:16 (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 27  18 45.82   22 49.5   3.990   4.748   133   16.6   0:26 (180, 32)  
July  4  18 35.01   22  0.7   3.963   4.736   134   16.6  23:42 (180, 33)  

* 257P/Catalina

Now it is 17.0 mag (May 29, Ken-ichi Kadota). 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 27  20 35.86   15  6.9   1.426   2.220   129   16.7   2:15 (180, 40)  
July  4  20 34.63   16  7.4   1.377   2.206   133   16.6   1:46 (180, 39)  

* 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 is appearing in the morning sky, but it locates extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 27   5 27.95    3 41.6   1.627   0.810    23   16.6   5:38 (262,  4)  
July  4   5 47.54    3  5.2   1.777   0.962    25   17.6   5:38 (262,  6)  

* 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 27  10 59.37  -15 17.8   6.735   6.591    77   16.8  18:28 (121, 58)  
July  4  11  3.27  -15  5.0   6.836   6.593    72   16.9  18:30 (114, 53)  

* 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 27  22 13.83   62 18.1   1.412   1.638    83   16.9   3:55 (180, -7)  
July  4  20 52.21   66 23.7   1.352   1.662    87   16.9   2:07 (180,-11)  

* 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 27  22 21.71  -59 45.1   1.383   2.138   125   17.1   4:01 (  0, 65)  
July  4  22 27.27  -61 40.4   1.312   2.088   127   17.0   3:39 (  0, 63)  

* 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 27  15 36.64  -15 49.6   9.013   9.813   139   17.2  21:13 (180, 71)  
July  4  15 33.20  -15 34.0   9.080   9.796   132   17.2  20:42 (180, 71)  

* 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 27  20 37.31  -22  0.9   5.085   5.982   149   17.3   2:17 (180, 77)  
July  4  20 35.22  -22  6.1   5.025   5.970   156   17.3   1:47 (180, 77)  

* 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 27  12 54.90  -10 13.7   1.734   2.172   101   17.3  18:32 (180, 65)  
July  4  13  1.98  -11  7.1   1.794   2.157    96   17.3  18:30 (169, 66)  

* 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 27   2  4.95   69 59.2   6.650   6.198    59   17.4   5:38 (191,-18)  
July  4   2  3.65   70 36.6   6.585   6.184    62   17.3   5:38 (188,-17)  

* 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 27   9 20.56  -58 55.9   5.631   5.721    89   17.3  18:28 ( 38, 48)  
July  4   9 23.86  -58  9.8   5.733   5.768    86   17.4  18:30 ( 40, 45)  

* 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 27  13  7.39   -4 42.5   1.676   2.130   101   17.5  18:45 (180, 60)  
July  4  13 16.02   -5 34.7   1.756   2.140    97   17.7  18:30 (178, 61)  

* 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 27  14 58.43   -0 48.0   3.081   3.761   125   17.6  20:35 (180, 56)  
July  4  14 56.75   -1 47.5   3.199   3.797   119   17.7  20:06 (180, 57)  

* 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 27  18 56.03  -20 34.4   6.693   7.701   172   17.6   0:36 (180, 76)  
July  4  18 52.23  -21 10.6   6.689   7.705   178   17.6   0:05 (180, 76)  

* 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 27  13 58.50  -30  0.8   2.534   3.181   121   17.6  19:35 (180, 85)  
July  4  13 57.87  -29 34.5   2.563   3.126   114   17.6  19:07 (180, 85)  

* 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 27  12 37.65   48 37.5   9.129   8.917    74   17.7  18:28 (178,  6)  
July  4  12 38.62   47 44.6   9.211   8.931    70   17.7  18:30 (173,  7)  

* A/2019 T2

Now it is 17.4 mag (June 19, Katsumi Yoshimoto). Taras Prystavski detected its cometary activity on June 17. 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 27  23 21.42    9 14.0   3.709   4.020   100   17.9   5:00 (180, 46)  
July  4  23 19.76    8 23.5   3.541   3.971   107   17.7   4:31 (180, 46)  

* A/2019 O3

Now it is 17.5 mag (June 1, 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 27  19 39.72   30 43.9   8.347   8.941   122   17.8   1:19 (180, 24)  
July  4  19 35.71   31 11.4   8.313   8.934   124   17.8   0:48 (180, 24)  

* 156P/Russell-LINEAR

It has not been observed yet in this apparition. It is expected to brighten up to 15 mag from October to November, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June 27  23 23.93  -31 45.7   1.407   2.046   114   18.1   5:03 (180, 87)  
July  4  23 33.93  -32  8.8   1.305   1.996   118   17.9   4:45 (180, 87)  

* 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 27  20 59.66  -34 40.0   3.681   4.546   144   17.9   2:39 (180, 90)  
July  4  20 55.58  -34 44.5   3.636   4.551   150   17.9   2:08 (180, 90)  

* 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 17.6 mag (May 29, ATLAS-HKO, Haleakala). 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 27  13 18.55   -4 22.9   1.906   2.370   104   17.9  18:56 (180, 60)  
July  4  13 24.98   -5 22.3   2.004   2.391    99   18.1  18:34 (180, 61)  

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