Weekly Information about Bright Comets (2019 July 20: South)

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 Updated on July 22, 2019
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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/2018 W2 ( Africano )

Now it is bright as 11.8 mag (July 4, Thomas Lehmann). It is expected to brighten up to 8 mag in autumn. In the Northern Hemisphere, it stays observable for a long time while the comet is brightening. In the Southern Hemisphere, it it not observable until mid September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   4 30.57   59 39.3   1.996   1.604    52   11.4   5:34 (202,-12)  
July 27   4 28.85   59 15.2   1.855   1.565    57   11.1   5:31 (200,-10)

* C/2018 N2 ( ASASSN )

Now it is 13.2 mag (June 30, Thomas Lehmann). It will brighten up to 10.5 mag and it will be observable in good condition from autumn to winter. It is a bit fainter than this ephemeris recently. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   2 41.35   12 27.4   3.429   3.314    74   11.9   5:34 (205, 39)  
July 27   2 42.80   14  4.8   3.298   3.292    80   11.8   5:31 (198, 39)

* C/2018 R3 ( Lemmon )

It brightened rapidly up to 10 mag in June. Now it is not observable. It will appear in the morning sky in October. But it will be fainter than 18 mag at that time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   8 53.38   34 26.9   2.366   1.441    18   12.1  18:38 (122,-14)  
July 27   9  8.85   30 36.2   2.445   1.490    15   12.6  18:42 (117,-15)

* 168P/Hergenrother

It has not been observed yet in this apparition. Now it is fainter than 18.5 mag (June 9, Martin Masek). It was expected to brighten up to 12 mag from August to September. But actually, it must be much fainter than expected. It is observable in good condition in the Northern Hemisphere. It will be low around the high light in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   2 40.79   16 35.7   1.247   1.372    73   13.4   5:34 (203, 35)  
July 27   3  1.26   20 27.4   1.215   1.363    74   13.0   5:31 (200, 32)

* C/2017 T2 ( PanSTARRS )

It is expected to brighten up to 7 mag in 2020. Appearing in the morning sky. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   4 43.59   17 44.1   4.497   3.849    45   13.2   5:34 (231, 19)  
July 27   4 49.90   18 28.7   4.352   3.783    50   13.0   5:31 (227, 21)

* 78P/Gehrels 2

Now it is not observable. It will appear in the morning sky again at 13-14 mag in August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   6 22.78   19 42.6   3.108   2.196    21   13.3   5:34 (245,  0)  
July 27   6 38.15   19 22.0   3.101   2.219    24   13.4   5:31 (244,  2)

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.8 mag (July 4, Steffen Fritsche). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   1  0.07   15 17.5   5.558   5.770    96   13.4   5:11 (180, 40)  
July 27   1  0.88   15 36.0   5.452   5.771   103   13.4   4:45 (180, 39)

* 260P/McNaught

Now it is 14.4 mag (June 30, Kevin Hills). It will brighten rapidly up to 11.5 mag in autumn. In the Northern Hemisphere, it will be observable in excellent condition. In the Southern Hemisphere, it will be extremely low from autumn to winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   0 55.73   -2 29.5   0.915   1.531   104   13.9   5:07 (180, 57)  
July 27   1 10.47    0 46.5   0.853   1.503   106   13.5   4:54 (180, 54)

* C/2018 A6 ( Gibbs )

Now it is 14.2 mag (July 20, Chris Wyatt). It stays 13 mag for a long time in 2019. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is not observasble until summer in 2020. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   8  3.74  -56  1.9   3.082   3.018    76   13.8  18:38 ( 38, 25)  
July 27   8 11.39  -57 25.7   3.084   3.020    76   13.8   5:31 (323, 26)

* C/2016 M1 ( PanSTARRS )

It brightened up to 7.7 mag in June in 2018 (June 19, Juan Jose Gonzalez). Now it is fading. But it is still bright as 13.4 mag (May 30, Chris Wyatt). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. In the Northern Hemisphere, it is not observable for a long time until autumn when the comet fades out down to 16 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   6 32.71  -28 40.1   4.814   4.285    53   13.9   5:34 (288, 26)  
July 27   6 38.13  -28 33.9   4.857   4.342    54   14.0   5:31 (286, 29)

* C/2018 W1 ( Catalina )

It brightened rapidly up to 11.2 mag from May to June (May 28, Chris Wyatt). Now it is fading. But it is still bright as 13.0 mag (July 20, Chris Wyatt). In the Southern Hemisphere, it stays observable in the evening sky for a long time after this while the comet will be fading. It is not observable at all in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   9 38.74  -40  5.6   1.811   1.669    65   14.0  18:38 ( 62, 34)  
July 27  10 15.12  -39 47.9   1.894   1.725    64   14.5  18:42 ( 62, 35)

* 68P/Klemola

Now it is 14.5 mag (July 3, Thomas Lehmann). It will be observable at 13.5 mag in good condition in autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  17 14.73   -4 16.5   1.250   2.115   137   14.3  21:23 (180, 59)  
July 27  17 13.46   -4 55.9   1.262   2.080   131   14.2  20:54 (180, 60)

* C/2017 M4 ( ATLAS )

Now it is 13.1 mag (June 28, Thomas Lehmann). It stays 13-14 mag until summer. It is observable in excellent condition in the Southern Hemisphere. 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)  
July 20  13 43.73  -42 30.5   3.336   3.682   101   14.3  18:38 ( 46, 78)  
July 27  13 39.27  -42 26.0   3.479   3.712    95   14.4  18:42 ( 58, 73)

* C/2017 B3 ( LINEAR )

Now it is 14.4 mag (June 10, Martin Masek). In the Southern Hemisphere, it is observable for a long time. It stays low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   0 26.10  -45 33.5   3.577   4.180   120   14.7   4:37 (  0, 80)  
July 27   0 22.40  -45 46.1   3.540   4.201   124   14.7   4:06 (  0, 79)

* C/2019 A9 ( PanSTARRS )

It brightens up to 15 mag from July to September. In the Southern Hemisphere, it stays observable in the low sky until it becomes fainter than 18 mag in autumn. It is not observable at all in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   7 14.67   -8 52.1   2.197   1.429    31   15.0   5:34 (276,  7)  
July 27   7 29.01  -13  0.6   2.134   1.426    35   15.0   5:31 (278, 11)

* C/2019 D1 ( Flewelling )

Now it is 15.5 mag (July 4, Thomas Lehmann). It stays at 15 mag for a while. It is observable in excellent condition in the Northern Hemisphere. It locates extremely low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   0 44.85   44 58.3   1.576   1.831    87   15.4   4:56 (180, 10)  
July 27   0 54.25   45 50.0   1.570   1.879    90   15.6   4:38 (180,  9)

* C/2018 Y1 ( Iwamoto )

It approached to Earth down to 0.3 a.u. in mid February, and brightened up to 5.5 mag (Feb. 13, Juan Jose Gonzalez). Now it is fading. Appearing in the morning sky. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   4 45.47   38  7.3   3.223   2.593    44   15.7   5:34 (218,  3)  
July 27   4 44.37   38 43.2   3.193   2.668    50   15.9   5:31 (213,  6)

* (3200) Phaethon

It passed the perihelion on July 2. Then it must have brightened up to 13 mag, but it was not observable around that time. In the Northern Hemisphere, it will appear in the morning sky at 16 mag in late July. In the Southern Hemisphere, it will be too low to observe. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   5 37.81   37 28.4   0.885   0.570    34   15.8   5:34 (226, -4)  
July 27   5 24.09   40  6.8   0.937   0.726    43   16.1   5:31 (218,  0)

* A/2017 U7

Asteroid, but it brightened rapidly. Now it is 16.3 mag (May 24, ATLAS-MLO, Mauna Loa). It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it locates extremely low for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  21 31.16  -42 19.7   5.523   6.428   150   16.0   1:44 (  0, 83)  
July 27  21 21.43  -42 42.9   5.499   6.425   153   15.9   1:06 (  0, 82)

* C/2018 F4 ( PanSTARRS )

Now it is 16.6 mag (May 10, Mount John Observatory, Lake Tekapo). It stays 16 mag for a long time from 2019 to 2020. It is observable in excellent condition in the Southern Hemisphere. It is hardly observable in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  10 54.11  -53 14.9   3.638   3.665    83   15.9  18:38 ( 47, 49)  
July 27  10 56.23  -53 22.3   3.682   3.644    79   15.9  18:42 ( 47, 44)

* C/2019 K5 ( Young )

Now it is 16.0 mag (June 27, Steward Observatory, Mt. Lemmon Station). It stays observable in good condition while the comet will be fading slowly after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   2 10.24   10 47.4   1.928   2.062    82   16.1   5:34 (196, 43)  
July 27   2 23.50   10 51.4   1.879   2.077    86   16.0   5:31 (192, 43)

* 123P/West-Hartley

It brightened up to 12-13 mag from winter to spring. Now it is fading. It has already faded down to 15.1 mag (June 5, Thomas Lehmann). It will be getting lower after this. It will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  12 24.21    2 40.7   2.671   2.473    67   16.1  18:38 (136, 43)  
July 27  12 33.81    1  1.3   2.772   2.499    64   16.3  18:42 (129, 41)

* C/2019 J2 ( Palomar )

It was bright as 16.3 mag in May (May 23, Ken-ichi Kadota). However, it is getting diffused very much in July. The nucleus may be disintegrated. It is observable in excellent condition in the Northern Hemisphere. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  14  1.50   70 35.3   1.765   1.726    70   16.1  18:38 (177,-15)  
July 27  13 52.64   62 47.7   1.801   1.728    69   16.2  18:42 (172, -8)

* 261P/Larson

It has not been observed yet in this apparition. It will be observable at 16 mag in good condition from summer to autumn. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   2 23.71   20 39.1   2.009   2.028    76   16.2   5:34 (197, 32)  
July 27   2 36.03   21 53.0   1.949   2.036    80   16.1   5:31 (193, 32)

* C/2016 N6 ( PanSTARRS )

Now it is 14.2 mag (May 7, Thomas Lehmann). It will be fading after this. In the Southern Hemisphere, it stays observable for a long time until it fades out. In the Northern Hemisphere, it will not be observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   6 26.21  -26  0.7   5.074   4.513    51   16.2   5:34 (285, 26)  
July 27   6 29.95  -27  8.8   5.086   4.564    53   16.3   5:31 (284, 30)

* C/2019 K7 ( Smith )

Now it is 16.6 mag (July 1, D. T. Durig). 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)  
July 20  21 41.54  -35  6.7   4.290   5.214   152   16.3   1:54 (  0, 90)  
July 27  21 32.20  -35  1.2   4.229   5.185   158   16.3   1:17 (180, 90)

* C/2016 R2 ( PanSTARRS )

Now it is 16.1 mag (June 5, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it stays extremely low for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  14 40.74   34 51.3   4.966   5.018    87   16.4  18:50 (180, 20)  
July 27  14 41.66   33 21.8   5.089   5.070    83   16.5  18:42 (176, 22)

* C/2019 K1 ( ATLAS )

Now it is 16.1 mag (June 5, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 14 mag in winter. It stays observable for a long time in the Southern Hemisphere. It is observable only until early August in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  15 23.90  -34 24.7   2.509   3.136   119   16.5  19:32 (180, 90)  
July 27  15 14.92  -35  5.8   2.560   3.079   111   16.4  18:56 (  0, 90)

* C/2018 KJ3 ( Lemmon )

Now it is 17.2 mag (May 26, iTelescope Observatory, Siding Spring). It will be fading slowly after this. It is observable in excellent condition in the Southern Hemisphere. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  15  9.30  -40 30.1   3.081   3.658   117   16.6  19:18 (  0, 84)  
July 27  14 57.89  -40  0.2   3.194   3.651   108   16.6  18:42 (  6, 85)

* C/2017 K2 ( PanSTARRS )

Now it is 16.7 mag (June 27, 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 highlight from 2022 summer to 2023 summer. In the Southern Hemisphere, it stays unobservable for a while. But it will be observable in good condition at the highlight. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  17 21.23   57 28.8  11.100  11.241    95   16.7  21:29 (180, -2)  
July 27  17 17.74   57  0.8  11.071  11.194    94   16.7  20:58 (180, -2)

* 101P/Chernykh

It has not been observed yet in this apparition. It will brighten up to 15.5 mag and it will be observable in good condition in autumn. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  23 59.18   -4 57.9   2.147   2.784   118   17.0   4:10 (180, 60)  
July 27   0  2.33   -4 58.6   2.045   2.754   124   16.8   3:46 (180, 60)

* C/2018 A3 ( ATLAS )

Now it is 16.7 mag (May 2, Kunihiro Shima). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it stays extremely low for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   4 24.16   48 44.8   4.288   3.720    50   16.9   5:34 (208, -3)  
July 27   4 23.80   48 54.2   4.227   3.751    55   16.9   5:31 (205, -1)

* P/2008 Y1 ( Boattini )

First return of a new periodic comet which brightened up to 16.5 mag in 2009. It has not been recovered yet in this apparition. It will brighten up to 16 mag in autumn. It is observable in good condition in the Northern Hemisphere. It locates low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   3 30.69   26  3.8   1.640   1.438    60   17.4   5:34 (211, 22)  
July 27   3 58.93   27 10.5   1.584   1.399    60   17.2   5:31 (211, 20)

* C/2019 K4 ( Ye )

Now it is 17.7 mag (June 24, D. T. Durig). It will be observable at 17 mag in good condition from August to September. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   1 34.11   38 27.5   2.214   2.289    81   17.3   5:34 (182, 16)  
July 27   1 31.18   36 52.5   2.099   2.304    88   17.2   5:15 (180, 18)

* 209P/LINEAR

Now it is 16.9 mag (May 29, Toshihiko Ikemura, Hirohisa Sato). It brightens up to 17 mag in July. It is observable in good condition in the Southern Hemisphere. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  12 36.69  -15 17.8   0.686   1.101    77   17.3  18:38 (121, 59)  
July 27  13  7.38  -22 36.3   0.716   1.149    81   17.4  18:42 (109, 63)

* C/2019 J3 ( ATLAS )

Now it is 18.0 mag (June 29, Michael Jager). It will brighten up to 17 mag from June to July, and will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  16 10.04   -8 13.5   1.650   2.376   124   17.3  20:18 (180, 63)  
July 27  15 53.84   -5 39.2   1.780   2.373   113   17.5  19:34 (180, 61)

* 74P/Smirnova-Chernykh

Now it is 16.4 mag (May 26, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in 2019. It locates somewhat low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  15 11.07  -15 55.2   3.445   3.954   112   17.4  19:20 (180, 71)  
July 27  15 12.32  -16 10.3   3.551   3.963   106   17.5  18:54 (180, 71)

* P/2012 K3 ( Gibbs )

It has not been observed yet in this apparition. It was expected to be observable at 17.5 mag from June to August. But actually, it was fainter than 21.5 mag in March (Mar. 10, Erwin Schwab). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  18 35.71  -15  9.3   1.116   2.100   160   17.5  22:44 (180, 70)  
July 27  18 32.77  -16 27.5   1.136   2.095   153   17.5  22:13 (180, 72)

* 186P/Garradd

Now it is 17.3 mag (May 26, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it is observable at 17.5 mag in good condition from spring to summer. In the Northern Hemisphere, it is not observable at all. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  16 13.81  -53 11.7   3.707   4.395   127   17.8  20:23 (  0, 72)  
July 27  16 13.10  -52 21.0   3.773   4.396   121   17.8  19:55 (  0, 73)

* A/2018 V3

Peculiar asteroid moving along a cometary orbit. Now it is 19.2 mag (July 9, Katsumi Yoshimoto). It will approach to Earth down to 0.37 a.u. in mid August. Then it will brighten up to 15 mag and will be observable in good condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20   2  1.03   -0 34.4   1.165   1.530    88   18.4   5:34 (197, 54)  
July 27   1 47.00   -2 56.7   0.928   1.484    99   17.8   5:31 (180, 58)

* 215P/NEAT

In the Southern Hemisphere, it is observable at 18 mag in good condition from July to August. It locates low in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 20  20 25.17  -32 42.8   2.637   3.633   166   17.9   0:38 (180, 88)  
July 27  20 20.23  -33  5.7   2.635   3.630   166   17.9   0:05 (180, 88)

* 160P/LINEAR

It has not been observed yet in this apparition. It will brighten up to 16 mag in autumn. It is observable 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)  
July 20  18 40.96  -43 57.5   1.212   2.164   152   18.1  22:49 (  0, 81)  
July 27  18 34.04  -42 58.5   1.205   2.131   147   17.9  22:15 (  0, 82)

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