Weekly Information about Bright Comets (2015 Sept. 19: North)

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Updated on September 25, 2015
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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/2013 US10 ( Catalina )

Now it is bright as 6.3 mag (Sept. 19, Marco Goiato). It is expected to brighten up to 4-5 mag from autumn to winter. It keeps observable in excellent condition until autumn in the Southern Hemisphere. In the Northern Hemisphere, it keeps unobservable until late November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  14 47.71  -45 44.0   1.446   1.326    62    6.1  19:27 ( 41,-11)  
Sept.26  14 41.14  -41 23.8   1.544   1.236    53    5.9  19:16 ( 47,-12)  

* C/2014 S2 ( PanSTARRS )

It brightened very rapidly. Now it is so bright as 10.4 mag (Sept. 24, Maik Meyer). It is observable at 10-12 mag until next spring in excellent condition in the Northern Hemisphere. It keeps unobservable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   3 14.66   78  9.3   1.986   2.308    95   10.8   3:27 (180, 47)  
Sept.26   3 14.21   82 45.7   1.942   2.276    95   10.7   3:00 (180, 42)  

* 22P/Kopff

Now it is very bright as 10.4 mag (Sept. 16, Marco Goiato). In the Northern Hemisphere, it keeps very low in the evening until mid December. It will be getting lower gradually after this even in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  15 15.08  -15 29.9   1.949   1.601    55   11.0  19:27 ( 60, 14)  
Sept.26  15 34.32  -16 58.3   1.972   1.586    53   11.0  19:16 ( 58, 13)  

* C/2014 Q2 ( Lovejoy )

It brightened up to 3.7 mag and became a naked eye comet in mid January (Jan. 13, Marek Biely). Now it is fading. But it is bright as 11.3 mag still now (Sept. 20, Seiichi Yoshida). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. It will be unobservable soon in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  16  2.69   37 29.9   3.556   3.332    69   11.2  19:27 (108, 51)  
Sept.26  16 10.29   35 15.2   3.673   3.405    66   11.4  19:16 (105, 49)  

* C/2014 Q1 ( PanSTARRS )

It approached to the sun down to 0.3 a.u. on July 6, and brighted up to 3.9 mag (July 6, Thomas Lehmann). Now it is 12.1 mag (Sept. 22, Chris Wyatt). In the Northern Hemisphere, it keeps observable until the comet fades out. It will not be observable after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  13 35.04  -42 51.3   2.126   1.689    51   11.9  19:27 ( 51,-20)  
Sept.26  13 57.20  -45  3.6   2.275   1.805    50   12.3  19:16 ( 48,-20)  

* 10P/Tempel 2

Now it is 14.3 mag (Sept. 6, Sandor Szabo). Finally it began to be visible visually. It will brighten very rapidly after this. It will brighten up to 11 mag from autumn to winter. But it keeps very low in the Northern Hemisphere. It will be getting lower gradually after this even in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  15 51.63  -15 48.9   1.688   1.535    63   12.2  19:27 ( 53, 19)  
Sept.26  16  9.68  -17 34.8   1.705   1.509    61   12.0  19:16 ( 51, 18)  

* 67P/Churyumov-Gerasimenko

Now it is 11.1 mag (Sept. 21, Seiichi Yoshida). It keeps bright as 11-12 mag from August to October. In the Northern Hemisphere, it is getting higher gradually, and it keeps observable in good condition after this. In the Southern Hemisphere, it keeps low until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   8 48.73   21 37.8   1.787   1.323    46   12.1   4:20 (262, 28)  
Sept.26   9 11.54   20 29.9   1.794   1.354    48   12.1   4:26 (265, 30)  

* C/2015 F4 ( Jacques )

It brightened rapidly up to 10.4 mag from July to August (July 18, Maik Meyer). Now it is fading, but it is bright as 12.2 mag still now (Sept. 18, Carlos Labordena). It is observable in good condition in the Northern Hemisphere, but it will be unobservable soon in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  18 48.75   44 36.8   1.234   1.724   100   12.2  19:27 (152, 79)  
Sept.26  18 53.12   45  4.6   1.298   1.754    98   12.5  19:16 (145, 77)  

* 141P/Machholz 2

It brightened rapidly in mid August. Now it is very bright as 11.5 mag (Sept. 21, Michael Jager). Secondary component H is also visible as 15 mag (Sept. 21, Michael Jager). In the Northern Hemisphere, it keeps observable in good condition in the morning sky. It keeps locating extremely low from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   8 56.76   15  1.9   1.262   0.869    43   12.6   4:20 (268, 23)  
Sept.26   9 18.91   11 51.6   1.333   0.928    44   13.2   4:26 (272, 24)  

* C/2013 X1 ( PanSTARRS )

Now it is bright as 12.5 mag (Sept. 21, Seiichi Yoshida). It will pass close to the earth from spring to summer in 2016, and it is expected to be observable at 6-7 mag in good condition. In the Northern Hemispehre, it keeps observable in excellent condition until winter. In the Southern Hemisphere, it keeps very low until winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   5 41.52   39 18.7   3.002   3.153    89   12.9   4:20 (250, 71)  
Sept.26   5 36.93   40 13.4   2.798   3.080    96   12.6   4:26 (240, 78)  

* 19P/Borrelly

Now it is 12.5 mag (Sept. 13, Michael Jager). In the Northern Hemisphere, it is appearing in the morning sky. It keeps observable after this while the comet will be fading. It is not observable in the Southern Hemisphere until January when the comet will fade down to 16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  10 46.23   28  6.3   2.649   1.844    29   13.5   4:20 (242,  9)  
Sept.26  11  4.61   27 11.8   2.666   1.893    32   13.7   4:26 (245, 11)  

* C/2015 P3 ( SWAN )

New bright comet. Now it is 11.6 mag (Aug. 18, Chris Wyatt). In the Southern Hemisphere, it keeps observable in the evening sky until the comet becomes fainter than 18 mag in winter. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  14 56.11  -44 55.1   1.311   1.241    63   13.5  19:27 ( 40,-10)  
Sept.26  15 22.66  -49 40.7   1.437   1.341    63   14.1  19:16 ( 36,-11)  

* 29P/Schwassmann-Wachmann 1

It brightened up to 12.9 mag in outburst on Sept. 22 (Jean-Francois Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  17 21.79  -29 22.6   5.990   6.007    86   13.7  19:27 ( 27, 20)  
Sept.26  17 24.64  -29 14.8   6.098   6.005    79   13.8  19:16 ( 30, 19)  

* 88P/Howell

It is fading, but bright as 12.7 mag still now (Sept. 17, Uwe Pilz). It keeps observable in good condition until winter when the comet becomes fainter than 18 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   2 53.42   12 38.4   1.355   2.150   130   13.8   3:05 (  0, 68)  
Sept.26   2 49.12   12 25.9   1.342   2.197   138   14.0   2:33 (  0, 68)  

* C/2012 F3 ( PanSTARRS )

Now it is 14.7 mag (Sept. 6, Sandor Szabo). In 2015, it keeps 13-14 mag and will be observable in good condition for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  19 15.99  -13 26.0   3.270   3.776   112   13.8  19:27 (  1, 42)  
Sept.26  19 19.58  -13 46.5   3.387   3.802   106   13.9  19:16 (  5, 41)  

* C/2015 G2 ( MASTER )

It brightened up to 6.0 mag in mid May (May 14, Chris Wyatt). Now it is fading. But it is bright as 12.5-13.0 mag still now (Sept. 12, Michael Jager). In the Northern Hemisphere, it keeps observable in good condition after this while the comet will be fading. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   8 42.10   19 38.6   2.681   2.140    47   13.9   4:20 (265, 29)  
Sept.26   8 41.88   20 34.5   2.652   2.233    54   14.1   4:26 (269, 36)  

* C/2014 W2 ( PanSTARRS )

Now it is 14.4 mag and visible visually (Sept. 6, Sandor Szabo). It keeps 13 mag for a long time from 2015 autumn to 2016 summer. In the Northern Hemispehre, it keeps observable in good condition for a long time. It keeps unobservable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   6 49.89   58 44.8   3.236   3.217    79   14.3   4:20 (215, 55)  
Sept.26   7  1.65   61 17.7   3.113   3.178    84   14.2   4:26 (209, 56)  

* C/2014 A4 ( SONEAR )

Now it is 15.6 mag (Sept. 13, Sandor Szabo). It will brighten up to 14 mag from 2015 to 2016. It keeps observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   2 31.71   13 44.2   3.405   4.182   135   14.4   2:43 (  0, 69)  
Sept.26   2 21.05   14  7.8   3.325   4.184   144   14.3   2:05 (  0, 69)  

* C/2011 KP36 ( Spacewatch )

Now it is 14.1 mag and visible visually (Aug. 21, Uwe Pilz). Distant object, but it keeps observable at 14-15 mag for a long time from 2015 to 2016.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  21 10.53   -4 49.4   4.384   5.209   141   14.4  21:18 (  0, 50)  
Sept.26  21  9.80   -5 19.7   4.436   5.192   134   14.4  20:50 (  0, 50)  

* 205P/Giacobini

It was so faint as 20.0 mag in August (Aug. 17, Hidetaka Sato). However, it brightened by 6 mag in outburst in mid September. Now it is bright as 13.7 mag (Sept. 21, Seiichi Yoshida). It keeps observable in excellent condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   4 46.61    8 26.0   1.503   1.998   103   14.4   4:20 (340, 62)  
Sept.26   4 51.00    7 16.0   1.473   2.039   109   14.6   4:26 (356, 62)  

* 318P/2014 M6 ( McNaught-Hartley )

First return of a periodic comet discovered in 1994. Now it is 15.4 mag (Aug. 27, Mitsunori Tsumura). It will brighten up to 15 mag from summer to autumn, and will be 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)  
Sept.19  22 39.06  -34 25.4   1.582   2.467   144   14.9  22:47 (  0, 21)  
Sept.26  22 35.67  -33 26.6   1.612   2.460   139   14.9  22:16 (  0, 22)  

* C/2014 N3 ( NEOWISE )

Now it is 14.9 mag (Aug. 26, D. Buczynski). It keeps 15 mag for a long time from 2014 to 2015. It is observable in excellent 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)  
Sept.19   2  4.98   42  7.8   3.550   4.216   125   15.0   2:16 (180, 83)  
Sept.26   1 57.82   43 21.8   3.513   4.240   131   15.0   1:42 (180, 82)  

* 116P/Wild 4

It is not observable now. It will be observable after mid October in the Northern Hemisphere, or after December in the Southern Hemisphere. It is expected to brighten up to 13 mag from winter to spring. It will be observable in excellent condition in the Southern Hemisphere. But it locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  10 53.77    9  1.6   3.289   2.329    14   15.3   4:20 (256, -4)  
Sept.26  11  7.13    7 35.0   3.249   2.313    17   15.2   4:26 (260, -1)  

* 61P/Shajn-Schaldach

Now it is 15.3 mag (Sept. 12, Sandor Szabo). It keeps observable at 15 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   2 33.21    8 43.6   1.272   2.116   136   15.3   2:44 (  0, 64)  
Sept.26   2 34.19    8 10.2   1.225   2.114   143   15.3   2:18 (  0, 63)  

* C/2013 V4 ( Catalina )

Now it is 14.9 mag (Sept. 13, Sandor Szabo). It keeps 15-16 mag for a long time until 2016. It keeps observable in excellent condition in the Northern Hemisphere. It keeps unobservable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   5 33.72   59  4.6   5.093   5.187    89   15.7   4:20 (204, 62)  
Sept.26   5 36.23   60 35.6   5.005   5.186    94   15.6   4:26 (195, 63)  

* 230P/LINEAR

Now it is 17.1mag (Aug. 27, A. Maury, J.-G. Bosch, J.-F. Soulier, T. Noel). It is expected to brighten rapidly, and to be observable at 14.5 mag in good condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   4  3.38   -6 36.4   0.905   1.613   115   15.9   4:14 (  0, 48)  
Sept.26   4 16.71   -7 16.1   0.849   1.586   117   15.6   3:59 (  0, 48)  

* C/2012 K1 ( PanSTARRS )

It brightened up to 6.9 mag in 2014 autumn (Oct. 17, Marco Goiato). Now it is fading. It has already faded down to 16.2 mag (Aug. 22, K. Hills). In the Southern Hemisphere, it keeps observable in good condition until the comet fades out. In the Northern Hemisphere, it keeps observable until winter, but it locates somewhat low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  23 27.00  -28 41.8   4.089   5.004   152   15.9  23:34 (  0, 26)  
Sept.26  23 18.11  -28 59.4   4.195   5.071   147   16.0  22:58 (  0, 26)  

* 57P/du Toit-Neujmin-Delporte

Now it is 15.1 mag (Sept. 13, Sandor Szabo). It keeps observable in good condition for a while. But it will be fading after this, and will be fainter than 18 mag in November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   0 20.20    3  2.2   1.038   2.035   169   16.0   0:32 (  0, 58)  
Sept.26   0 15.25    2 13.2   1.064   2.066   177   16.1  23:55 (  0, 57)  

* 117P/Helin-Roman-Alu 1

It brightened up to 13 mag in 2014. Now it is 15.2 mag (Sept. 12, Sandor Szabo). It will be fading slowly after this. It is observable at 16 mag in excellent condition from summer to winter in 2015.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   1 32.58    1 10.5   2.971   3.890   152   16.0   1:44 (  0, 56)  
Sept.26   1 28.68    0 49.7   2.948   3.906   160   16.0   1:13 (  0, 56)  

* 44P/Reinmuth 2

It brightened up to 16.4 mag in 2014 (Nov. 14, J. F. Hernandez). Now it is 17.2 mag (Aug. 27, D. Buczynski). It will be observable at 16 mag again from summer to autumn in 2015. However, it is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   4 21.65   28  0.6   2.014   2.501   107   16.1   4:20 (338, 83)  
Sept.26   4 24.61   28 14.8   1.958   2.527   113   16.1   4:08 (  0, 83)  

* C/2010 S1 ( LINEAR )

Now it is 15.1 mag (July 13, Yuji Ohshima). It is observable at 15-16 mag in good condition until autumn. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  17 35.00  -26 16.2   8.258   8.299    88   16.4  19:27 ( 25, 24)  
Sept.26  17 34.54  -26 29.9   8.412   8.331    81   16.4  19:16 ( 29, 22)  

* C/2014 W5 ( Lemmon-PanSTARRS )

No observations have been reported after November in 2014. Current brightness is uncertain. It must keep 16 mag for a long time from 2015 autumn to 2016 summer. It keeps 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)  
Sept.19   2 43.05  -22 51.7   2.239   3.002   131   16.5   2:54 (  0, 32)  
Sept.26   2 27.38  -26 40.9   2.155   2.966   136   16.4   2:11 (  0, 29)  

* 81P/Wild 2

No observations have been reported after November in 2014. It will brighten up to 11 mag from spring to summer in 2016. In the Northern Hemisphere, it keeps observable in good condition while the comet will be brightening. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   5 44.26   20 11.7   2.875   3.033    89   17.0   4:20 (299, 64)  
Sept.26   5 49.98   20  8.2   2.740   2.994    94   16.8   4:26 (311, 69)  

* 151P/Helin

Now it is 18.3 mag (Aug. 18, Jean-Francois Soulier). It will be observable at 17 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  23 35.97   -6 56.2   1.477   2.479   174   17.0  23:43 (  0, 48)  
Sept.26  23 33.01   -7 30.1   1.487   2.476   167   16.9  23:13 (  0, 48)  

* P/2003 WC7 ( LINEAR-Catalina )

It has not been recovered yet. But it must be already bright as 17 mag. It will approach to the earth from autumn to winter, and it is expected to brighten up to 15 mag and observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   4 21.31   -7  7.2   1.247   1.857   110   17.2   4:20 (356, 48)  
Sept.26   4 30.97   -7  1.3   1.169   1.825   114   17.0   4:14 (  0, 48)  

* C/2011 J2 ( LINEAR )

Now it is 15.5 mag (Sept. 6, Sandor Szabo). It is fading, but it is a bit brighter than this ephemeris. The fragments B and C are already fainter than 20 mag (June 12, Takaaki Oribe).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  23  0.20    2 55.4   5.458   6.444   168   17.0  23:07 (  0, 58)  
Sept.26  22 55.49    1 54.5   5.531   6.490   161   17.0  22:35 (  0, 57)  

* 174P/(60558) 2000 EC98 ( Echeclus )

Now it is 17.5 mag (July 25, Katsumi Yoshimoto). It has brightened in outburst up to 14 mag twice, in 2006 January and 2011 May. It is around the perihelion now. It keeps observable at 17 mag for a long time after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  23 13.42   -4 33.5   4.865   5.861   171   17.0  23:21 (  0, 50)  
Sept.26  23 11.02   -4 52.3   4.893   5.865   164   17.1  22:51 (  0, 50)  

* 162P/Siding Spring

Now it is 16.3 mag (Aug. 22, E. Bryssinck). It is observable in good 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)  
Sept.19   8 17.68   38 40.3   1.699   1.474    59   17.2   4:20 (246, 41)  
Sept.26   8 41.34   39 11.3   1.701   1.517    62   17.2   4:26 (246, 43)  

* C/2015 K1 ( MASTER )

Now it is 16.0 mag (Aug. 20, Catalina Sky Survey). It keeps observable in good condition until the comet fades out. In 2014, it must have been observable at 14 mag in good condition in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   0 27.45    2 26.9   3.290   4.278   168   17.4   0:39 (  0, 58)  
Sept.26   0 22.41    2 29.4   3.329   4.330   176   17.5   0:07 (  0, 58)  

* 118P/Shoemaker-Levy 4

It will brighten up to 14 mag in 2016 summer. But it is not observable at the highlight. It keeps observable until March while the comet will be brightening gradually up to 15-16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   0 48.82   -2 36.2   1.824   2.802   163   17.6   1:00 (  0, 53)  
Sept.26   0 44.26   -3 30.8   1.779   2.772   170   17.4   0:28 (  0, 52)  

* 327P/2015 P2 ( Van Ness )

Now it is 18.8 mag (Aug. 10, A. Sodor, K. Sarneczky). It was predicted to be observable at 17.5 mag in good condition from autumn to winter, but it is a bit fainter actually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  18 31.72   11 17.4   1.282   1.778   101   17.5  19:27 ( 26, 64)  
Sept.26  18 41.18    7 56.3   1.295   1.747    98   17.5  19:16 ( 27, 60)  

* 50P/Arend

Now it is 17.1 mag (Aug. 23, E. Bryssinck). It was expected to brighten rapidly, and to be observable at 16 mag in good condition from summer to winter. But actually, it is much fainter than predicted.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  22 56.37  -12  2.2   1.303   2.287   164   17.7  23:03 (  0, 43)  
Sept.26  22 48.94  -11 19.6   1.300   2.256   156   17.6  22:29 (  0, 44)  

* 74P/Smirnova-Chernykh

Now it is 18.9 mag (Aug. 25, S. Shurpakov). Now it is near the aphelion. It is observable at 17 mag in good condition from autumn to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   3 55.36   16 36.1   3.825   4.350   115   17.7   4:06 (  0, 72)  
Sept.26   3 55.15   16 35.2   3.725   4.342   122   17.6   3:39 (  0, 72)  

* P/2010 V1 ( Ikeya-Murakami )

First return of a periodic comet which brightened up to 8 mag in major outburst in 2010. It will be observable in excellent condition from winter to spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   7  5.55   31 16.4   2.224   2.133    71   18.2   4:20 (263, 53)  
Sept.26   7 21.39   31 13.6   2.116   2.095    75   17.7   4:26 (265, 57)  

* 319P/2015 G1 ( Catalina-McNaught )

First return of a periodic comet discovered in 2008. It approached to the earth and brightened up to 16 mag from spring to summer (June 2, WISE). Now it is fading. It has already faded down to 17.9 mag (Aug. 13, W. Hasubick).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   3 56.32  -10 10.2   0.807   1.546   116   17.7   4:07 (  0, 45)  
Sept.26   3 55.19  -10 57.5   0.817   1.598   122   17.9   3:38 (  0, 44)  

* C/2013 G3 ( PanSTARRS )

Now it is 17.8 mag (Aug. 19, A. Diepvens). It was observed at 17 mag in 2014 summer. In the Northern Hemisphere, it is observable at 17.5 mag in excellent condition also in 2015. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  21 49.54   50  7.5   4.057   4.676   122   17.7  21:57 (180, 75)  
Sept.26  21 47.80   48 45.7   4.082   4.709   123   17.8  21:28 (180, 76)  

* 299P/2014 D2 ( Catalina-PanSTARRS )

Now it is 16.5 mag (Aug. 8, J. Oey, P. Camilleri, H. Williams). It will be fading after this, and will be fainter than 18 mag in October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  17  7.29  -22 12.5   3.293   3.312    82   17.8  19:27 ( 33, 25)  
Sept.26  17 14.37  -22  8.6   3.400   3.323    77   17.9  19:16 ( 36, 24)  

* C/2010 U3 ( Boattini )

It will pass the perihelion in 2019. However, it has not been brightening since the discovery in 2010. Now it is 18.3 mag (Aug. 23, S. Shurpakov). It keeps observable in excellent condition from autumn to next spring 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)  
Sept.19   3 52.97   45 25.8  10.780  11.126   107   17.9   4:04 (180, 80)  
Sept.26   3 51.87   45 49.6  10.658  11.101   113   17.9   3:35 (180, 79)  

* P/2015 Q2 ( Pimentel )

New comet. It is brightest now. It will be fading rapidly after October. It is observable in excellent condition in the SOuthern Hemisphere. But it will be unobservable soon in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   0 14.69  -64 22.2   1.130   1.823   117   17.9   0:31 (  0, -9)  
Sept.26  22 37.46  -67 20.6   1.226   1.829   109   18.1  22:10 (  0,-12)  

* P/2015 Q1 ( Scotti )

New comet. It will be observable at 17.5 mag in excellent condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   5 24.06   11 29.6   1.337   1.734    94   18.0   4:20 (320, 61)  
Sept.26   5 36.79    9 26.2   1.287   1.738    98   17.9   4:26 (331, 62)  

* 320P/2015 HC10 ( McNaught )

It was expected to brighten rapidly up to 15 mag in August. But actually, it is so faint as 19.7 mag, much fainter than predicted (Aug. 15, Slooh.com Canary Islands Observatory).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19  20  3.42    0  4.7   0.223   1.147   124   19.0  20:16 (  0, 55)  
Sept.26  20 55.34    2  9.1   0.270   1.199   131   19.5  20:39 (  0, 57)  

* 51P/Harrington

It brightened up to 15.9 mag in June as predicted (June 23, Ken-ichi Kadota). It was expected to be observable at 13 mag in good condition from summer to autumn. However, Jean-Gabriel Bosch detected the comet became disintegrating in July. Now it is so faint as 19.3 mag (Aug. 26, W. Hasubick). The fragment D and B are also observed as 19.0 mag (Sept. 20, Michael Jager) and 20.9 mag (Aug. 21, Pan-STARRS 1, Haleakala) respectively.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Sept.19   2 25.04    3 15.9   0.847   1.738   139   21.8   2:36 (  0, 58)  
Sept.26   2 25.54    3 16.1   0.831   1.753   145   22.5   2:09 (  0, 58)  

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