Weekly Information about Bright Comets (2018 Apr. 21: North)

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Updated on April 22, 2018
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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/2016 M1 ( PanSTARRS )

Now it is bright as 9.9 mag (Apr. 19, Juan Jose Gonzalez). It is expected to brighten up to 9 mag in summer. In the Southern Hemisphere, it stays observable in good condition for a long time until the comet will fade out. In the Northern Hemisphere, it is observable only until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  19 41.98   -6 35.8   2.269   2.549    94   10.8   3:51 (321, 40)  
Apr. 28  19 42.30   -8 28.1   2.113   2.511   101   10.6   3:40 (327, 41)  

* C/2016 R2 ( PanSTARRS )

Now it is 11.5 mag (Apr. 18, Juan Jose Gonzalez). It stays bright as 11 mag for a long time. In the Southern Hemisphere, it is not observable for a long time after this. In the Northern Hemispehre, it stays observable for a long time until the comet fades out. But it will be getting lower gradually after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   4 57.90   41 30.6   3.141   2.610    49   11.0  20:07 (121, 32)  
Apr. 28   5  9.85   42 52.4   3.195   2.605    46   11.0  20:15 (125, 28)  

* C/2016 N6 ( PanSTARRS )

Now it is 12.1 mag (Apr. 18, Juan Jose Gonzalez). It stays 12 mag for a long time until spring in 2019. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from mid June to August. In the Southern Hemisphere, it is not observable until September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   7 52.34   63 58.6   2.832   2.824    79   12.1  20:07 (155, 55)  
Apr. 28   7 48.77   60 29.7   2.907   2.802    73   12.1  20:15 (146, 53)  

* 66P/du Toit

It brightened rapidly as expected. Now it is very bright as 11.0 mag (Apr. 16, Chris Wyatt). It stays at 11-12 mag until June. In the Southern Hemisphere, it stays observable in excellent condition. In the Northern Hemisphere, it will be unobservable from April to June when the comet becomes brightest.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  20 48.58  -39 57.3   0.941   1.344    87   12.4   3:51 (327,  4)  
Apr. 28  21 26.75  -39 26.9   0.919   1.321    86   12.1   3:40 (323,  2)  

* 169P/NEAT

The condition of this apparition is worst. It brightens up to 12.5 mag from April to May. But it is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   1 26.34    7 52.4   1.607   0.626     7   12.8   3:51 (249,-15)  
Apr. 28   2 11.51   10 45.7   1.605   0.604     3   12.5   3:40 (242,-19)  

* C/2015 O1 ( PanSTARRS )

Now it is very bright as 12.3 mag (Apr. 18, Juan Jose Gonzalez). It will be observable at 12-13 mag for a long time from 2017 to 2018. In the Southern Hemisphere, it will be hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  14 32.80   55 58.3   3.277   3.769   111   12.9   0:39 (180, 69)  
Apr. 28  14  8.20   56 44.7   3.325   3.778   109   13.0  23:40 (180, 68)  

* C/2017 T3 ( ATLAS )

Now it is 15.1 mag (Mar. 22, Alexander Baransky). It will brighten up to 9 mag in summer. However, it is hardly observable when it is bright. In the Northern Hemisphere, it is not observable until late December. In the Southern Hemisphere, it is observable from July to September, but it locates in extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   2 13.97   31 21.5   2.652   1.744    20   13.5  20:07 (131, -1)  
Apr. 28   2 28.86   29 56.7   2.593   1.650    16   13.2  20:15 (133, -5)  

* 29P/Schwassmann-Wachmann 1

Appearing in the morning sky. Now it is a bit brighter, 15.7 mag (Apr. 7, Jean-Francois Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  22 55.29   -3  7.0   6.427   5.786    46   13.8   3:51 (280,  8)  
Apr. 28  22 59.40   -2 34.0   6.343   5.785    52   13.7   3:40 (281, 11)  

* 37P/Forbes

Now it is bright as 12.6 mag (Apr. 16, Chris Wyatt). It will be observable at 13-14 mag in good condition from spring to summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  21 14.89  -22  2.5   1.527   1.616    76   14.1   3:51 (311, 14)  
Apr. 28  21 33.34  -20 12.9   1.478   1.611    78   14.0   3:40 (309, 16)  

* 48P/Johnson

Now it is 17.1 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly after this, and it will brighten up to 11 mag from summer to autumn. 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)  
Apr. 21  20 46.37  -16 13.9   2.110   2.190    80   14.6   3:51 (312, 23)  
Apr. 28  20 58.85  -15 53.8   2.015   2.169    84   14.3   3:40 (313, 24)  

* C/2015 V2 ( Johnson )

It brightened up to 7.1 mag from May to June in 2017 (June 21, Juan Jose Gonzalez). Now it is fading. It has already faded down to 15.2 mag (Mar. 4, B. Lutkenhoner). In the Southern Hemisphere, it stays observable for a long time after this. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   0 44.52  -43 24.0   4.515   4.061    57   14.8   3:51 (303,-33)  
Apr. 28   0 54.22  -43  9.6   4.529   4.127    60   14.8   3:40 (303,-32)  

* C/2017 M4 ( ATLAS )

Now it is 15.7 mag (Mar. 16, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13-14 mag from 2018 to 2019. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low until summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  19 31.67   43 42.3   4.075   4.127    85   15.2   3:51 (239, 68)  
Apr. 28  19 26.45   44 27.9   3.971   4.088    89   15.1   3:40 (233, 71)  

* C/2017 K6 ( Jacques )

It brightened up to 12.7 mag in winter (Jan. 6, Thomas Lehmann). Now it is fading. It has already faded down to 15.0 mag (Mar. 22, Toshihiko Ikemura, Hirohisa Sato). It will be getting lower gradually after this in the evening sky. It will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   4 20.10   15 32.2   3.125   2.382    35   15.3  20:07 (101, 12)  
Apr. 28   4 31.28   17 34.1   3.225   2.426    31   15.4  20:15 (106,  9)  

* 21P/Giacobini-Zinner

Now it is 16.9 mag (Apr. 18, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly, and brighten up to 7 mag from August to September. In the Northern Hemisphere, it will be observable in excellent condition. In the Southern Hemisphere, it will be unobservable from July to August. But it will be observable in good condition before and after tha.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  19 26.45   14 40.8   1.737   2.060    93   15.7   3:51 (306, 60)  
Apr. 28  19 37.00   17 21.0   1.624   1.996    95   15.3   3:40 (304, 63)  

* C/2017 B3 ( LINEAR )

Now it is 16.2 mag (Mar. 17, S. G. McAndrew). It stays 15 mag from 2018 to 2019, and it will be observable for a long time in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  13 10.55  -67 36.5   3.998   4.630   123   15.4  23:12 (  0,-13)  
Apr. 28  12 57.59  -67 57.3   3.955   4.599   124   15.3  22:31 (  0,-13)  

* 185P/Petriew

It brightened up to 11 mag in February. Now it is fading. It has already faded down to 14.5 mag (Apr. 5, Martin Masek). It stays observable in the evening sky until the comet fades out.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   5 41.22   11 53.4   1.797   1.482    55   15.5  20:07 ( 86, 27)  
Apr. 28   6  5.00   12  2.3   1.895   1.548    54   16.1  20:15 ( 88, 25)  

* 62P/Tsuchinshan 1

It brightened up to 9.2 mag from November to December (Nov. 16, Juan Jose Gonzalez). Now it is fading rapidly. It has already faded down to 16.6 mag (Apr. 12, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition until summer when it fades out.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  13 54.27    5 35.1   1.152   2.132   162   15.7   0:00 (  0, 60)  
Apr. 28  13 47.42    5 25.1   1.211   2.180   158   16.1  23:21 (  0, 60)  

* 65P/Gunn

Appearing in the morning sky. It is observable at 15 mag in 2018, in good 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)  
Apr. 21  22 27.26  -18  3.9   3.446   3.053    59   15.8   3:51 (296,  5)  
Apr. 28  22 36.07  -17 29.6   3.375   3.063    63   15.8   3:40 (297,  7)  

* C/2015 VL62 ( Lemmon-Yeung-PanSTARRS )

Appearing in the morning sky. It is fading now. But it stays 16 mag until summer. But actually, it is 18.1 mag (Mar. 23, Toshihiko Ikemura, Hirohisa Sato), fainter than this ephemeris.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  18 52.63  -25 12.3   3.171   3.621   108   15.9   3:51 (343, 28)  
Apr. 28  18 42.35  -25 50.7   3.086   3.666   117   15.9   3:40 (350, 28)  

* C/2017 S3 ( PanSTARRS )

It is expected to approach to Sun down to 0.2 a.u. and brighten up to 3 mag in August. Now it is 17.5 mag (Mar. 24, D. Buczynski). In the Northern Hemisphere, it stays observable in the morning sky until early August when the comet brightens up to 6 mag. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  23 30.66   53 30.6   2.952   2.440    50   16.2   3:51 (223, 30)  
Apr. 28  23 45.75   54  5.6   2.848   2.335    50   16.0   3:40 (222, 30)  

* C/2016 A1 ( PanSTARRS )

Now it is 16.1 mag (Apr. 15, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a long time from 2017 to 2018. It is observable in excellent condition in the Northern Hemisphere. It locates very low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   7  5.38   44 39.9   5.646   5.441    73   16.0  20:07 (120, 55)  
Apr. 28   7  5.47   44 48.9   5.767   5.452    66   16.1  20:15 (120, 49)  

* (3552) Don Quixote

It brightens up to 16 mag in spring. In the Southern Hemisphere, it stays observable until August, but it will be unobservable after that. In the Northern Hemisphere, it stays unobservable until June, but it will be observable in good condition after that. Its cometary activity was observed on Mar. 26 (M. Mommert, D. Polishook, N. Moskovitz).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  23 18.42  -27 32.9   1.543   1.259    54   16.0   3:51 (297,-10)  
Apr. 28  23 40.16  -23 25.7   1.532   1.246    54   16.0   3:40 (293, -9)  

* 74P/Smirnova-Chernykh

Now it is 16.0 mag (Apr. 6, Sandor Szabo). It will be fading slowly until summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  11 22.16   13 12.8   2.768   3.549   134   16.1  21:24 (  0, 68)  
Apr. 28  11 20.68   13  6.0   2.842   3.551   127   16.2  20:55 (  0, 68)  

* C/2017 S6 ( Catalina )

It brightened up to 15-16 mag in winter. Appearing in the morning sky. It stays observable at 16.5 mag for a while. It will be observable in good condition after this in the Southern Hemisphere. But it stays low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  22 57.47   -3 11.0   2.238   1.706    46   16.6   3:51 (279,  8)  
Apr. 28  22 55.55   -4 45.6   2.137   1.749    54   16.6   3:40 (284, 11)  

* C/2014 B1 ( Schwartz )

Now it is 16.6 mag (Apr. 9, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  10 17.34    8 37.5   9.060   9.637   122   16.6  20:20 (  0, 64)  
Apr. 28  10 17.34    8 49.2   9.164   9.642   115   16.6  20:15 ( 12, 63)  

* C/2018 A3 ( ATLAS )

Now it is 16.7 mag (Apr. 15, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15 mag in January, 2019. It stays observable in excellent condition in the Northern Hemispehre. It is observable only until June in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  11 11.33   31 58.7   3.490   4.106   121   16.8  21:13 (  0, 87)  
Apr. 28  11  1.94   32 51.5   3.562   4.068   113   16.9  20:36 (  0, 88)  

* C/2010 U3 ( Boattini )

Now it is 16.0 mag (Apr. 6, Sandor Szabo). It is observable in good conditioin in the Northern Hemisphere. It is not observable for a long time in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   6 16.87   72 24.8   8.907   8.644    71   16.9  20:07 (160, 43)  
Apr. 28   6 25.73   72  4.3   8.960   8.635    68   16.9  20:15 (159, 41)  

* C/2016 N4 ( MASTER )

Now it is 16.4 mag (Mar. 14, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Northern Hemisphere, it stays observable in the northern sky for a long time. It is not observable at all after this in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   3  8.78   86 52.7   3.926   3.798    75   16.9  20:07 (176, 34)  
Apr. 28   6  4.38   86 19.7   3.987   3.833    73   17.0  20:15 (176, 37)  

* C/2018 C2 ( Lemmon )

Now it is 16.3 mag (Apr. 15, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag from spring to summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  15  8.76   41 10.1   1.279   2.024   124   17.1   1:14 (180, 84)  
Apr. 28  15  4.62   40 12.8   1.251   2.004   124   17.0   0:43 (180, 85)  

* C/2018 E1 ( ATLAS )

Now it is 16.8 mag (Mar. 15, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it is observable at 17 mag in good condition. It will be too low to observe in June. In the Northern Hemisphere, it locates extremely low only in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   5 51.56  -26 43.3   2.893   2.706    69   17.0  20:07 ( 53,  4)  
Apr. 28   6  4.47  -24  5.5   2.944   2.708    66   17.1  20:15 ( 58,  2)  

* 143P/Kowal-Mrkos

Now it is 16.8 mag (Apr. 5, Martin Masek). It is observable at 17 mag in good condition in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  12 49.34  -11  3.6   1.553   2.535   164   17.1  22:51 (  0, 44)  
Apr. 28  12 46.34  -10 26.6   1.577   2.533   156   17.2  22:21 (  0, 45)  

* C/2014 OE4 ( PanSTARRS )

Now it is 16.7 mag (Mar. 17, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this, and 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 will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  22 34.06   66 46.7   7.477   7.098    64   17.1   3:51 (209, 39)  
Apr. 28  22 43.55   67 32.3   7.506   7.120    63   17.1   3:40 (208, 40)  

* C/2017 D3 ( ATLAS )

Now it is 17.3 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and it will be fainter than 18 mag in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  11 42.10   24 18.8   4.959   5.677   131   17.1  21:44 (  0, 79)  
Apr. 28  11 37.05   25  4.9   5.075   5.702   124   17.2  21:11 (  0, 80)  

* C/2017 E3 ( PanSTARRS )

Now it is 16.8 mag (Apr. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  14 51.58  -12  8.5   5.362   6.342   165   17.2   0:57 (  0, 43)  
Apr. 28  14 48.37  -11 11.7   5.360   6.359   172   17.2   0:27 (  0, 44)  

* C/2017 M5 ( TOTAS )

Now it is 18.4 mag (Mar. 17, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag in good condition from spring to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  20 50.10   -1 38.2   6.150   5.997    76   17.4   3:51 (300, 33)  
Apr. 28  20 53.17   -1  7.9   6.046   5.995    82   17.4   3:40 (303, 36)  

* C/2017 O1 ( ASASSN )

It brightened up to 8-9 mag in autumn. Now it is fading rapidly. It has already faded down to 18.3 mag (Apr. 15, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it will never be observable again after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   8 27.68   59 12.8   2.786   2.865    84   17.4  20:07 (154, 61)  
Apr. 28   8 40.08   57 11.1   2.920   2.934    80   17.6  20:15 (147, 60)  

* C/2017 T1 ( Heinze )

It brightened up to 9-10 mag from December to February. Now it is fading very rapidly. It has already faded, fainter than 18.5 mag (Apr. 17, Martin Masek). In the Northern Hemisphere, it stays extremely low after this. In the Southern Hemisphere, it will be getting higher in the morning sky after this, then it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  22 11.93  -25 10.8   1.366   1.317    65   17.4   3:51 (304,  3)  
Apr. 28  22 17.75  -30 42.5   1.340   1.428    73   17.7   3:40 (309,  1)  

* C/2014 R3 ( PanSTARRS )

Now it is 16.9 mag (Apr. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  10 46.09   38  4.2   7.806   8.260   113   17.4  20:48 (180, 87)  
Apr. 28  10 42.94   37 30.5   7.921   8.281   107   17.5  20:18 (180, 88)  

* 30P/Reinmuth 1

Now it is 17.7 mag (Mar. 25, D. Buczynski). It stays observable at 17-18 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  15  5.74   -4 30.3   1.773   2.742   160   17.4   1:12 (  0, 50)  
Apr. 28  14 59.95   -4  6.0   1.791   2.778   166   17.5   0:38 (  0, 51)  

* 64P/Swift-Gehrels

It has not been observed yet in this apparition. It will brighten rapidly, and it is expected to brighten up to 10 mag in autumn. It will be observable in excellent condition in the Northern Hemisphere. It stays low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  21 38.35  -13 59.3   2.739   2.546    68   17.8   3:51 (301, 16)  
Apr. 28  21 48.77  -12 50.3   2.605   2.492    72   17.5   3:40 (301, 18)  

* 364P/2018 A2 ( PanSTARRS )

First return of a new periodic comet which brightened up to 13 mag in 2013. Now it is 18.8 mag (Apr. 6, Michael Jager). It will brighten very rapidly after this, up to 11 mag in summer. In the Southern Hemisphere, it stays observable in good condition all through this apparition. In the Northern Hemisphere, it is not observable at the high light from mid June to mid August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21   8 34.94   35 25.6   0.743   1.264    91   18.3  20:07 ( 97, 72)  
Apr. 28   8 35.43   33 32.4   0.722   1.191    85   17.7  20:15 ( 95, 64)  

* 187P/LINEAR

Now it is 19.7 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It was predicted to be observable at 17.5 mag in good condition from spring to summer. But recently, it is fainter than predicted.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  16 35.08   -8 18.4   3.057   3.883   140   17.7   2:41 (  0, 47)  
Apr. 28  16 32.56   -8  8.0   2.998   3.882   147   17.7   2:11 (  0, 47)  

* 365P/2017 U6 ( PanSTARRS )

It brightened up to 15.7 mag in February (Feb. 11, Catalina Sky Survey). Now it is fading rapidly. It has already faded down to 17.1 mag (Apr. 15, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in late April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  13 15.21   17 23.2   0.604   1.556   149   17.8  23:17 (  0, 72)  
Apr. 28  13 14.00   15 10.6   0.653   1.593   146   18.1  22:48 (  0, 70)  

* 186P/Garradd

Now it is 17.9 mag (Mar. 16, ATLAS-HKO, Haleakala). It stays 18 mag from 2018 to 2020. It is observable in good condition in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  12 32.02  -37 53.5   3.634   4.518   148   17.9  22:34 (  0, 17)  
Apr. 28  12 27.50  -37 31.7   3.647   4.513   145   17.9  22:02 (  0, 17)  

* 105P/Singer Brewster

Now it is 17.0 mag (Mar. 26, Alexander Baransky). It is observable at 18 mag in good condition in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 21  12 22.02   -1  5.7   1.261   2.212   154   17.9  22:24 (  0, 54)  
Apr. 28  12 19.64   -0  9.0   1.278   2.193   147   17.9  21:54 (  0, 55)  

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