Weekly Information about Bright Comets (2017 July 8: South)

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Updated on July 8, 2017
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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/2015 V2 ( Johnson )

Now it is 7.7 mag (June 28, Marco Goiato). In the Northern Hemisphere, it will be getting lower after this, and it will be unobservable in August. In the Southern Hemisphere, it is observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  14 12.70  -15 39.0   1.020   1.673   110    8.1  19:07 (180, 71)  
July 15  14 14.45  -21  7.5   1.106   1.695   105    8.3  18:41 (180, 77)  

* C/2015 ER61 ( PanSTARRS )

Outburst occured on Apr. 4, and it brightened by 2 mag, up to 6.2 mag (Apr. 7, Juan Jose Gonzalez). Now it is fading. But it is bright as 9.5 mag still now (July 2, Juan Jose Gonzalez). It stays observable for a long time after this. But it locates low in the Northern Hemisphere. A fragment of 15 mag was detected in mid June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   2 43.55   20 21.3   1.595   1.419    61    9.0   5:37 (213, 27)  
July 15   2 58.40   21 14.2   1.623   1.494    64    9.3   5:36 (209, 28)  

* 71P/Clark

Now it is bright as 10.1 mag (July 2, Juan Jose Gonzalez). 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  8  16 30.96  -34 49.5   0.651   1.588   143   10.4  21:25 (180, 90)  
July 15  16 36.02  -35 44.7   0.683   1.593   138   10.4  21:03 (  0, 89)  

* 217P/LINEAR

Now it is bright as 13.0 mag (June 30, Chris Wyatt). It will brighten rapidly, and it is expected to brighten up to 12 mag from July to September. In the Southern Hemisphere, it stays at the same altitude in the morning sky. In the Northern Hemisphere, it will be getting higher slowly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   3 14.55    8 10.9   1.434   1.240    57   12.3   5:37 (227, 34)  
July 15   3 41.55    9 17.5   1.430   1.236    57   12.1   5:36 (227, 33)  

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

Now it is 14.6 mag (June 30, Chris Wyatt). It will brighten up to 12-13 mag and will be observable in good condition in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  23 45.29   15 24.7   2.371   2.773   102   13.2   4:42 (180, 39)  
July 15  23 31.97   14 48.5   2.215   2.760   111   13.0   4:01 (180, 40)  

* 103P/Hartley 2

It has not been observed yet in this apparition. The condition of this apparition is worst. It must have brightened up to 10 mag in spring, but it is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   7 20.94   14 19.1   2.483   1.486     8   13.1  18:32 (100,-11)  
July 15   7 41.81   13 14.9   2.545   1.546     8   13.5  18:35 ( 97,-13)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.2 mag (July 2, Juan Jose Gonzalez).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  21 37.40  -13 23.4   4.984   5.833   143   13.2   2:34 (180, 68)  
July 15  21 35.02  -13 28.5   4.923   5.832   150   13.2   2:05 (180, 68)  

* C/2016 R2 ( PanSTARRS )

In the Southern Hemisphere, it will be getting higher gradually in the morning sky after this. Then it will be observable at 11 mag for a long time from 2017 autumn to 2018 winter. In the Northern Hemisphere, it will appear in the morning sky in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   4 40.05   -6 31.2   4.681   4.049    46   13.4   5:37 (257, 28)  
July 15   4 46.46   -5 58.5   4.575   3.999    50   13.3   5:36 (253, 32)  

* 213P/Van Ness

Now it is bright as 13.6 mag (June 30, Chris Wyatt). It was expected to brighten up to 12 mag in summer. But actually, it is fainter than expected. 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)  
July  8  19  9.90  -31 29.1   1.064   2.074   171   14.1   0:08 (180, 86)  
July 15  19  3.78  -30 46.9   1.054   2.059   168   13.9  23:29 (180, 86)  

* 65P/Gunn

Now it is 14.1 mag (June 30, Chris Wyatt). It stays 14 mag from spring to summer. It locates somewhat low in the Northern Hemisphere. The perihelion distance increased from 2.4 a.u. to 2.9 a.u. in this apparition. So it will not be bright as before.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  15 43.25  -22 15.3   2.167   2.954   132   14.1  20:37 (180, 77)  
July 15  15 42.74  -22 28.1   2.233   2.948   126   14.2  20:09 (180, 78)  

* C/2016 N4 ( MASTER )

Now it is 15.6 mag (June 4, T. Ikemura, H. Sato). In the Northern Hemisphere, it will brighten up to 14 mag from summer to winter, and it will be observable in excellent condition. In the Southern Hemisphere, it will be observable in the very low sky only from May to June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   0 42.77   44 41.0   3.313   3.270    78   14.2   5:37 (180, 10)  
July 15   0 42.57   47 36.3   3.223   3.257    82   14.2   5:12 (180,  7)  

* C/2015 O1 ( PanSTARRS )

Now it is 14.7 mag (June 30, Chris Wyatt). It will be observable at 14 mag for a long time from 2017 to 2018.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  17 17.93   23 21.2   3.539   4.228   126   14.4  22:11 (180, 32)  
July 15  17  6.42   23 37.1   3.574   4.200   121   14.4  21:32 (180, 31)  

* 41P/Tuttle-Giacobini-Kresak

It approached to Earth down to 0.14 a.u. from late March to early April, and it brightened up to 6.0 mag (Apr. 7, Juan Jose Gonzalez). Now it is fading. But it is bright as 11.2 mag still now (June 30, Chris Wyatt). It stays observable in good condition after this until the comet fades out.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  18 10.54   -6 14.6   0.532   1.524   158   14.7  23:04 (180, 61)  
July 15  18  9.68   -8 58.7   0.602   1.584   155   15.5  22:36 (180, 64)  

* C/2016 M1 ( PanSTARRS )

Now it is 15.9 mag (June 9, Kunihiro Shima). It is expected to brighten up to 9 mag in summer in 2018. In the Northern Hemisphere, it stays observable until 2018 summer while the comet will be brightening. In the Southern Hemisphere, it is hardly observable in 2017, but it will be observable in good condition in 2018.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  17 49.52   52  4.7   4.388   4.729   103   15.0  22:42 (180,  3)  
July 15  17 40.22   50 57.7   4.337   4.672   103   14.9  22:05 (180,  4)  

* C/2017 D2 ( Barros )

Now it is 17.5 mag (June 16, Kunihiro Shima). It will brighten up to 15.5 mag in summer. It will be observable in excellent condition in the Southern Hemisphere. It will be getting higher gradually in the morning sky also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  22  4.93  -35 15.1   1.623   2.487   139   15.5   3:02 (  0, 90)  
July 15  22  0.78  -34 12.0   1.577   2.486   146   15.4   2:30 (180, 89)  

* C/2011 KP36 ( Spacewatch )

Now it is 15.6 mag (Mar. 6, Kunihiro Shima). It is appearing in the morning sky. It stays observable at 15.5 mag unil the end of 2017.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   3 13.30    4 51.3   6.137   5.687    59   15.5   5:37 (230, 36)  
July 15   3 17.82    4 49.1   6.070   5.712    64   15.5   5:36 (224, 40)  

* C/2016 N6 ( PanSTARRS )

Now it is 15.9 mag (June 11, Kunihiro Shima). It is expected to brighten up to 11-12 mag from 2018 to 2019. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually. In the Southern Hemisphere, it is not observable until 2018 October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  16  1.55   61 19.8   4.493   4.574    88   15.7  20:54 (180, -6)  
July 15  15 47.30   60 45.5   4.485   4.523    85   15.6  20:12 (180, -6)  

* C/2017 E1 ( Borisov )

It brightened up to 11 mag from March to April. Now it is fading. But it is bright as 12.7 mag still now (May 26, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it stays observable for a long time, but it stays low. It will be getting higher slowly also in the Northern Hemisphere, but it stays extremely low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   3 26.94    8  5.0   2.111   1.741    55   15.7   5:37 (230, 32)  
July 15   3 38.51    8  3.8   2.136   1.831    58   16.1   5:36 (227, 34)  

* 352P/2017 L1 ( Skiff )

First return of a new periodic comet discovered in 2000. Now it is 17.8 mag (June 16, Kunihiro Shima). It will brighten rapidly, and it is expected to be observable at 15.5 mag in good condition from July to September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   0 58.87  -12 24.8   2.208   2.540    96   15.9   5:37 (191, 67)  
July 15   1  4.74  -11 44.0   2.135   2.544   101   15.8   5:33 (180, 67)  

* C/2017 K4 ( ATLAS )

Now it is 15.8 mag (May 28, iTelescope Observatory, Siding Spring). It stays 16 mag for a long time until summer in 2018. In the Southern Hemisphere, it stays observable in excellent condition until autumn. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  16 46.57  -35 55.7   2.313   3.210   146   15.9  21:40 (  0, 89)  
July 15  16 44.34  -35  7.6   2.326   3.173   140   15.8  21:11 (  0, 90)  

* C/2015 V1 ( PanSTARRS )

Now it is 16.0 mag (June 16, Kunihiro Shima). It stays observable at 16 mag for a long time from 2017 to 2018. It is getting higher gradually in the morning sky.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   2 44.82   31 21.8   4.920   4.475    58   16.0   5:37 (207, 17)  
July 15   2 45.03   31  8.0   4.792   4.458    64   15.9   5:36 (202, 20)  

* 47P/Ashbrook-Jackson

Now it is 16.7 mag (June 4, T. Ikemura, H. Sato). It was observed at 17 mag in 2016. In 2017, it will be observable at 15.5 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   1 20.42    9 33.0   2.748   2.823    83   16.0   5:37 (194, 44)  
July 15   1 26.30   10 35.7   2.661   2.825    88   16.0   5:36 (187, 44)  

* C/2017 K6 ( Jacques )

Now it is 17.0 mag (May 29, iTelescope Observatory, Siding Spring). It will brighten up to 14.5 mag in winter. In the Southern Hemisphere, it stays observable in excellent condition until spring in 2018. In the Northern Hemisphere, it stays unobservable until 2018.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   0 33.54  -67 28.4   2.330   2.897   114   16.5   5:29 (  0, 58)  
July 15   0 53.66  -69 21.2   2.273   2.841   113   16.3   5:22 (  0, 56)  

* C/2014 OE4 ( PanSTARRS )

Now it is 16.2 mag (June 9, Kunihiro Shima). It stays 16 mag from 2016 to 2017. 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)  
July  8  18 20.66   65 51.9   6.306   6.407    91   16.4  23:13 (180,-11)  
July 15  18 13.84   66  3.7   6.320   6.418    90   16.4  22:38 (180,-11)  

* 73P/Schwassmann-Wachmann 3

It brightened up to 11.5 mag from late March to early April (Mar. 24, Andrew Pearce). Now it is fading. It has already faded down to 15.6 mag (May 6, CAO, San Pedro de Atacama). Bright 12-mag new fragment BT was discovered on Feb. 10, but now it is faint as 16.7 mag (Apr. 18, F.-J. Hambsch, E. Bryssinck). In the Southern Hemisphere, it stays observable for a long time after this. It is getting observable in the morning sky again also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   2 35.39    5  8.5   1.867   1.760    67   16.4   5:37 (220, 42)  
July 15   2 44.78    5 43.6   1.857   1.824    72   16.7   5:36 (214, 43)  

* P/2017 M2 ( LINEAR-NEAT )

Now it is 19.1 mag (June 22, Erwin Schwab, Pablo Ruiz). Return of a new periodic comet which brightened up to 13 mag in 2004. It will be observable in excellent condition in autumn. It is expected to brighten up to 14 mag, if the comet is as bright as when it was discovered.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   1  5.77   -6 51.4   1.584   1.931    93   16.8   5:37 (193, 61)  
July 15   1 18.43   -5 51.2   1.498   1.903    96   16.5   5:36 (186, 61)  

* 81P/Wild 2

It brightened up to 11 mag from spring to summer in 2016. Now it is 16.3 mag (June 1, Alexander Baransky). It stays observable for a long time after this, but it will be fainter than 18 mag in October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  20 10.00  -18 27.5   2.294   3.287   165   16.5   1:08 (180, 73)  
July 15  20  3.74  -18 50.9   2.312   3.323   173   16.5   0:34 (180, 74)  

* (457175) 2008 GO98

Hilda-type minor planet, but the cometary activity was detected on July 3. Now it is bright as 16.5 mag (July 3, G. J. Leonard).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  21 26.88    3 56.8   2.468   3.286   137   16.6   2:24 (180, 51)  
July 15  21 23.90    3 51.0   2.430   3.303   143   16.6   1:53 (180, 51)  

* 2P/Encke

Now it is fading rapidly. It has already faded down to 16.9 mag (June 2, T. Ikemura, H. Sato). In the Southern Hemisphere, it stays observable in good condition after this while the comet will be fading. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  22  3.91  -22 33.0   1.140   2.025   139   17.0   3:01 (180, 77)  
July 15  21 48.29  -23 38.9   1.157   2.099   149   16.9   2:18 (180, 79)  

* C/2016 B1 ( NEOWISE )

Now it is 15.8 mag (June 14, Kunihiro Shima). It will fade out after this, and it will be fainter than 18 mag in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  17 55.00   27 22.4   3.093   3.794   127   17.0  22:48 (180, 28)  
July 15  17 51.31   27 34.3   3.159   3.828   124   17.2  22:17 (180, 27)  

* 145P/Shoemaker-Levy 5

Now it is 18.4 mag (May 31, iTelescope Observatory, Siding Spring). It will brighten rapidly, up to 15 mag in autumn, and will be 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  8   2 35.48   12 30.6   2.162   1.969    65   17.3   5:37 (215, 35)  
July 15   2 50.11   14  8.2   2.089   1.954    68   17.2   5:36 (211, 35)  

* 189P/NEAT

Now it is 18.4 mag (May 26, iTelescope Observatory, Siding Spring). It brightens up to 16.5-17 mag in August, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  15  0.98  -29 25.5   0.367   1.261   124   17.5  19:56 (180, 84)  
July 15  15 19.93  -23  5.9   0.360   1.241   121   17.3  19:48 (180, 78)  

* 96P/Machholz 1

Now it is 19.7 mag (Apr. 27, iTelescope Observatory, Siding Spring). It will pass the perihelion on Oct. 27. In the Southern Hemisphere, it stays observable while the comet will be brightening, until early October when the comet will brighten up to 9 mag. In the Northern Hemisphere, it is not observable at all in this apparition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  22 28.13  -65 42.4   1.452   2.213   126   17.6   3:25 (  0, 60)  
July 15  22 16.76  -70 11.2   1.361   2.124   125   17.3   2:47 (  0, 55)  

* C/2017 E3 ( PanSTARRS )

Now it is 17.2 mag (June 5, ATLAS-MLO, Mauna Loa). It is observable in good condition in the Southern Hemisphere. It stays extremely low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  12 45.62  -29  2.6   5.728   5.921    96   17.5  18:32 (115, 78)  
July 15  12 48.57  -28 10.4   5.835   5.924    90   17.6  18:35 (106, 72)  

* C/2017 B3 ( LINEAR )

Now it is 17.4 mag (June 16, Kunihiro Shima). 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 be too low to observe soon, then it will never be observable again. It will be unobservable temporarily from September to October also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  11 58.31  -26 31.4   6.161   6.165    85   17.5  18:32 (105, 67)  
July 15  11 59.94  -26 39.5   6.221   6.124    79   17.5  18:35 ( 98, 61)  

* C/2017 M4 ( ATLAS )

Now it is 17.2 mag (June 26, D. Briggs). 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 is not observable until summer in 2018.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  21  8.87   70 20.2   5.949   5.943    84   17.6   2:06 (180,-15)  
July 15  20 51.72   70 38.1   5.863   5.896    86   17.5   1:21 (180,-16)  

* C/2014 W2 ( PanSTARRS )

It stayed bright 12 mag for a long time from autum in 2015 to summer in 2016. Now it is fading. It has already faded dwon to 16.8 mag (June 14, Kunihiro Shima).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  16  2.98  -15 25.8   4.608   5.382   135   17.6  20:57 (180, 71)  
July 15  15 59.17  -15 58.8   4.745   5.434   128   17.7  20:25 (180, 71)  

* 130P/McNaught-Hughes

Now it is 17.9 mag (May 27, T. Ikemura, H. Sato). It will be brightening slowly until autumn when it becomes 16.5-17 mag. It will be getting lower gradually in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  14 13.76  -11 44.8   1.892   2.427   109   17.6  19:08 (180, 67)  
July 15  14 16.52  -12 18.7   1.942   2.394   103   17.6  18:43 (180, 67)  

* (944) Hidalgo

Now it is 17.9 mag (June 2, MASTER-OAFA Observatory). It will brighten up to 14 mag from autumn to winter in 2018, and it will be observable in excellent condition in the Northern Hemisphere. In 2017, it is observable at 17 mag in excellent condition in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8   0 27.86  -40 57.6   3.934   4.416   111   17.7   5:24 (  0, 84)  
July 15   0 28.34  -41 34.4   3.823   4.375   116   17.6   4:57 (  0, 84)  

* C/2015 H2 ( PanSTARRS )

It stays observable at 18 mag from spring to summer. It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it stays low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  22 29.35  -34  6.8   4.703   5.466   134   17.7   3:26 (180, 89)  
July 15  22 27.06  -34 11.6   4.664   5.489   140   17.7   2:56 (180, 89)  

* C/2015 LC2 ( PanSTARRS )

It has been 17 mag from 2016 to 2017. It stays bright even after the perihelion passage. It is bright as 17.9 mag still now (June 9, Kunihiro Shima). It is observable in excellent condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  15  0.73   31 14.8   7.812   8.050    99   17.9  19:55 (180, 24)  
July 15  14 59.36   31  6.4   7.926   8.081    95   18.0  19:26 (180, 24)  

* C/2013 X1 ( PanSTARRS )

It brightened up to 6.2 mag in June in 2016 (June 24, Marco Goiato). Now it is 16.8 mag (June 16, Kunihiro Shima). In the Southern Hemisphee, it stays observable in excellent condition after this. It stays low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July  8  12 23.89  -20 26.2   5.328   5.390    88   17.9  18:32 (127, 68)  
July 15  12 24.10  -20  1.5   5.511   5.454    81   18.1  18:35 (116, 63)  

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