Weekly Information about Bright Comets (2015 Aug. 29: North)

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Updated on August 30, 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 6.4 mag (Aug. 28, 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)  
Aug. 29  15 49.82  -63 37.2   1.171   1.604    94    6.5  20:00 ( 17,-13)  
Sept. 5  15 16.26  -56 51.0   1.252   1.511    83    6.4  19:49 ( 27,-12)  

* 322P/SOHO

It will pass the perihelion on Sept. 4. But it is not observable from the ground because it locates too close to the Sun.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  11 25.06   -0 59.5   0.895   0.315    17   13.6  20:00 ( 99,-14)  
Sept. 5  10 44.36    8 52.5   1.075   0.084     2    7.4   4:07 (248,-15)  

* 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 9.5 mag (Aug. 20, Marco Goiato). 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)  
Aug. 29  12 24.42  -33 16.4   1.693   1.318    51   10.4  20:00 ( 62,-19)  
Sept. 5  12 48.75  -37  4.8   1.833   1.445    51   11.0  19:49 ( 57,-20)  

* 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 10.1 mag still now (Aug. 18, Juan Jose Gonzalez). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. It locates extremely low in the Southern Hemisphere, and it will be unobservable in late September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  15 40.32   45 16.5   3.220   3.113    74   10.7  20:00 (120, 57)  
Sept. 5  15 47.68   42 30.7   3.329   3.186    73   10.9  19:49 (116, 55)  

* 22P/Kopff

Now it is 11.7 mag (Aug. 7, Marco Goiato). It will brighten up to 11 mag autumn. In this apparition, it is observable until the highlight while the comet is brightening.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  14 22.73  -10 43.7   1.879   1.661    61   11.3  20:00 ( 64, 16)  
Sept. 5  14 39.27  -12 21.2   1.903   1.639    59   11.2  19:49 ( 62, 15)  

* 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 11.3 mag still now (Aug. 21, Uwe Pilz). It is observable in good condition in the Northern Hemisphere, but it will be getting lower gradually in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  18 52.15   41 46.1   1.034   1.662   108   11.5  20:22 (180, 83)  
Sept. 5  18 48.09   43  3.6   1.101   1.678   105   11.8  19:51 (180, 82)  

* 141P/Machholz 2

It brightened rapidly in mid August. Now it is very bright as 11.2 mag (Aug. 28, Juan Jose Gonzalez). Secondary component is also visible as 14.0 mag (Aug. 28, 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)  
Aug. 29   7 33.73   25 25.0   1.021   0.764    44   11.8   4:01 (255, 25)  
Sept. 5   8  4.62   21 51.7   1.104   0.783    43   11.8   4:07 (259, 24)  

* 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)  
Aug. 29  13 41.42  -22  6.8   0.993   0.957    57   11.8  20:00 ( 61,  1)  
Sept. 5  14  6.01  -31 25.1   1.083   1.047    59   12.4  19:49 ( 53, -3)  

* 67P/Churyumov-Gerasimenko

Now it is 11.8 mag (Aug. 26, Katsumi Yoshimoto). It keeps bright as 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)  
Aug. 29   7 32.77   24  2.2   1.769   1.259    44   12.2   4:01 (257, 24)  
Sept. 5   7 59.25   23 26.6   1.774   1.275    44   12.2   4:07 (258, 26)  

* 10P/Tempel 2

Now it is faint as 16.8 mag (Aug. 18, J. Oey, P. Camilleri, H. Williams). It will brighten very rapidly after this. It will brighten up to 11 mag from autumn to winter. But it locates low at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  15  4.97  -10 12.6   1.632   1.627    71   13.1  20:00 ( 56, 24)  
Sept. 5  15 19.28  -12  6.3   1.652   1.594    68   12.8  19:49 ( 55, 22)  

* 19P/Borrelly

It brightened up to 12.8 mag until March (Mar. 21, Michael Mattiazzo). It must have brightened up to 10.5 mag in May and June, but it was not observable. In the Northern Hemisphere, it will be observable after autumn while the comet will be fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   9 45.81   30 30.4   2.586   1.703    23   12.9   4:01 (234,  3)  
Sept. 5  10  6.84   29 47.3   2.608   1.749    25   13.1   4:07 (237,  5)  

* 88P/Howell

It is fading, but bright as 11.4 mag still now (Aug. 21, 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)  
Aug. 29   2 55.70   12 37.2   1.429   2.011   109   13.1   4:01 (342, 67)  
Sept. 5   2 56.76   12 44.4   1.400   2.057   116   13.3   4:03 (  0, 68)  

* C/2015 G2 ( MASTER )

It brightened up to 6.0 mag in mid May (May 14, Chris Wyatt). Now it is fading. It has faded down to 9.0 mag in late June (June 21, Marco Goiato). It is appearing in the morning sky. 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)  
Aug. 29   8 38.29   17 12.3   2.692   1.858    27   13.3   4:01 (254,  8)  
Sept. 5   8 40.18   17 58.7   2.703   1.953    34   13.6   4:07 (258, 14)  

* C/2013 X1 ( PanSTARRS )

Now it is 13.7 mag (Aug. 26, Hiroshi Abe). 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 will be getting higher gradually in the morning sky, then 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)  
Aug. 29   5 45.17   37  9.8   3.603   3.372    68   13.6   4:01 (252, 50)  
Sept. 5   5 45.27   37 47.4   3.406   3.300    75   13.3   4:07 (253, 57)  

* C/2012 F3 ( PanSTARRS )

Now it is 12.9 mag (July 11, Gabor Santa). 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)  
Aug. 29  19  9.68  -12 10.2   2.958   3.703   131   13.5  20:41 (  0, 43)  
Sept. 5  19 11.02  -12 37.4   3.055   3.727   125   13.6  20:15 (  0, 42)  

* 29P/Schwassmann-Wachmann 1

It brightened in outburst twice in July. It is bright as 12.1 mag still now (Aug. 10, Chris Wyatt).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  17 16.52  -29 50.4   5.667   6.013   105   13.6  20:00 ( 17, 23)  
Sept. 5  17 17.71  -29 40.4   5.773   6.011    98   13.6  19:49 ( 20, 22)  

* C/2014 S2 ( PanSTARRS )

Now it is 13.8 mag and visible visually (Aug. 13, Sandor Szabo). It is expected to brighten up to 15 mag from autum to next spring, and to be 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)  
Aug. 29   2 58.92   64 36.5   2.188   2.418    90   14.1   4:01 (187, 60)  
Sept. 5   3  5.17   69  0.7   2.109   2.379    92   13.9   4:07 (181, 56)  

* C/2011 KP36 ( Spacewatch )

Now it is 14.1 mag and visible visually (July 10, Jakub Cerny). 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)  
Aug. 29  21 15.34   -3 15.0   4.298   5.263   160   14.4  22:46 (  0, 52)  
Sept. 5  21 13.38   -3 46.4   4.314   5.245   154   14.4  22:16 (  0, 51)  

* C/2014 A4 ( SONEAR )

Now it is 15.4 mag (Aug. 26, D. Buczynski). 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)  
Aug. 29   2 56.21   12 16.8   3.728   4.181   109   14.6   4:01 (342, 66)  
Sept. 5   2 49.32   12 48.1   3.610   4.180   118   14.5   3:56 (  0, 68)  

* C/2014 W2 ( PanSTARRS )

Now it is 14.7 mag (Aug. 26, Hiroshi Abe). 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)  
Aug. 29   6 18.09   52  9.4   3.624   3.338    65   14.7   4:01 (229, 46)  
Sept. 5   6 28.24   54 11.3   3.493   3.297    70   14.6   4:07 (225, 50)  

* 318P/2014 M6 ( McNaught-Hartley )

First return of a periodic comet discovered in 1994. Now it is 15.8 mag (Aug. 22, K. Hills). 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)  
Aug. 29  22 52.95  -35 56.3   1.554   2.497   153   14.9   0:27 (  0, 19)  
Sept. 5  22 48.07  -35 40.7   1.553   2.485   151   14.9  23:50 (  0, 19)  

* 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)  
Aug. 29   2 19.44   37 48.2   3.722   4.149   108   15.0   3:53 (180, 87)  
Sept. 5   2 15.82   39 19.4   3.656   4.171   114   15.0   3:22 (180, 86)  

* C/2014 W11 ( PanSTARRS )

It brightened very rapidly, and brightened up to 13.8 mag (May 11, Sandor Szabo). It is not observable now. It will appear in the morning sky in November, but it will be fainter than 17 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  11 12.51   -4 15.1   4.418   3.470    17   15.3  20:00 ( 97,-18)  
Sept. 5  11 21.84   -5 20.4   4.446   3.478    14   15.4  19:49 ( 98,-20)  

* 61P/Shajn-Schaldach

Now it is 16.3 mag (Aug. 24, S. Shurpakov). It will be observable at 15 mag in good condition in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   2 21.86    9 37.4   1.452   2.130   118   15.6   3:55 (  0, 65)  
Sept. 5   2 26.97    9 27.8   1.386   2.124   124   15.5   3:33 (  0, 65)  

* 57P/du Toit-Neujmin-Delporte

Now it is 14.6 mag and visible visually (July 12, Jakub Cerny). It will be observable in excellent condition at 14-15 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   0 31.78    5  5.7   1.026   1.946   145   15.5   2:06 (  0, 60)  
Sept. 5   0 28.91    4 31.8   1.020   1.974   153   15.7   1:35 (  0, 60)  

* 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)  
Aug. 29  23 55.41  -26 58.1   3.877   4.800   153   15.6   1:30 (  0, 28)  
Sept. 5  23 45.89  -27 40.7   3.930   4.868   155   15.6   0:53 (  0, 27)  

* C/2013 V4 ( Catalina )

Now it is 15.8 mag (Aug. 5, Ken-ichi Kadota). 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)  
Aug. 29   5 21.47   54 47.0   5.373   5.194    74   15.8   4:01 (223, 54)  
Sept. 5   5 26.20   56 10.1   5.279   5.191    79   15.8   4:07 (218, 58)  

* 117P/Helin-Roman-Alu 1

It brightened up to 13 mag in 2014. Now it is 16.3 mag (Aug. 27, A. Maury, J.-G. Bosch, J.-F. Soulier, T. Noel). 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)  
Aug. 29   1 40.45    2  2.4   3.108   3.843   130   16.0   3:14 (  0, 57)  
Sept. 5   1 38.56    1 47.7   3.052   3.859   137   16.0   2:45 (  0, 57)  

* 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)  
Aug. 29   4  4.82   26 54.9   2.193   2.426    90   16.2   4:01 (284, 68)  
Sept. 5   4 11.64   27 20.6   2.133   2.451    95   16.1   4:07 (292, 73)  

* 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)  
Aug. 29  17 39.24  -25 32.9   7.801   8.204   110   16.2  20:00 ( 13, 28)  
Sept. 5  17 37.33  -25 47.7   7.950   8.235   102   16.2  19:49 ( 17, 27)  

* 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)  
Aug. 29   3 19.90   -5  0.7   1.104   1.706   107   16.5   4:01 (340, 48)  
Sept. 5   3 34.79   -5 27.1   1.033   1.673   110   16.3   4:07 (348, 49)  

* C/2011 J2 ( LINEAR )

Now it is 15.9 mag (Aug. 20, Catalina Sky Survey). It is fading, but it is observable at 17 mag in good condition until late autumn. 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)  
Aug. 29  23 15.32    5 57.8   5.346   6.307   160   16.8   0:50 (  0, 61)  
Sept. 5  23 10.22    4 58.1   5.366   6.353   167   16.9   0:17 (  0, 60)  

* 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)  
Aug. 29   3 12.96  -12 44.5   2.621   3.118   110   17.0   4:01 (345, 41)  
Sept. 5   3  5.51  -15 48.1   2.476   3.078   117   16.9   4:07 (359, 39)  

* 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)  
Aug. 29  23 20.89   -3 35.8   4.866   5.850   165   17.0   0:55 (  0, 52)  
Sept. 5  23 18.45   -3 54.7   4.851   5.853   172   16.9   0:25 (  0, 51)  

* 162P/Siding Spring

Now it is 16.3 mag (Aug. 22, E. Bryssinck). In the Northern Hemisphere, it is getting higher gradually in the morning sky. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   7  1.75   35 49.2   1.692   1.360    53   17.0   4:01 (248, 35)  
Sept. 5   7 27.65   37  1.5   1.695   1.395    55   17.1   4:07 (247, 37)  

* 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)  
Aug. 29  23 44.14   -5  5.7   1.521   2.496   160   17.4   1:18 (  0, 50)  
Sept. 5  23 41.83   -5 41.5   1.494   2.489   167   17.2   0:48 (  0, 49)  

* 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)  
Aug. 29   0 41.34    2  9.7   3.258   4.124   144   17.2   2:15 (  0, 57)  
Sept. 5   0 37.08    2 17.6   3.255   4.175   152   17.3   1:44 (  0, 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)  
Aug. 29   3 43.47   -7 39.5   0.783   1.402   102   17.2   4:01 (333, 44)  
Sept. 5   3 50.49   -8 28.4   0.791   1.448   106   17.4   4:07 (343, 45)  

* 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)  
Aug. 29   5 23.77   20 12.3   3.278   3.148    73   17.6   4:01 (279, 49)  
Sept. 5   5 31.07   20 13.9   3.145   3.110    78   17.4   4:07 (284, 54)  

* 299P/2014 D2 ( Catalina-PanSTARRS )

Now it is 16.5 mag (Aug. 8, J. Oey, P. Camilleri, H. Williams). It keeps observable at 17 mag from spring to summer. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  16 49.84  -22 29.2   2.972   3.280    98   17.5  20:00 ( 26, 28)  
Sept. 5  16 54.96  -22 22.3   3.078   3.290    93   17.6  19:49 ( 29, 27)  

* C/2014 AA52 ( Catalina )

It brightened up to 15.3 mag in winter (Jan. 17, Taras Prystavski). Now it is fading. It has already faded down to 16.6 mag (Aug. 18, Catalina Sky Survey). It keeps observable in good condition for a while. But it will be fainter than 18 mag in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  21 58.79  -11 26.0   1.920   2.925   172   17.5  23:28 (  0, 44)  
Sept. 5  21 40.78  -10 37.1   2.007   2.981   161   17.7  22:42 (  0, 45)  

* 221P/LINEAR

It brightened up to 15.6 mag from spring to summer (July 8, Taras Prystavski). Now it is fading. It has already faded down to 16.8 mag (Aug. 21, B. Haeusler). It will be fainter than 18 mag in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  17 23.43   -8 19.7   1.266   1.812   104   17.6  20:00 ( 22, 44)  
Sept. 5  17 35.91   -8 47.0   1.336   1.828   101   17.7  19:49 ( 24, 43)  

* P/2003 WC7 ( LINEAR-Catalina )

It has not been recovered yet. But it must be already bright as 18 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)  
Aug. 29   3 48.07   -7 20.0   1.504   1.965   100   17.8   4:01 (332, 44)  
Sept. 5   3 59.72   -7 15.0   1.415   1.927   104   17.6   4:07 (339, 46)  

* 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 19.4 mag (July 28, iTelescope Observatory, Siding Spring) 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)  
Aug. 29   2 11.90    2 49.1   0.933   1.707   122   17.7   3:45 (  0, 58)  
Sept. 5   2 18.18    3  3.8   0.899   1.715   127   17.6   3:24 (  0, 58)  

* 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)  
Aug. 29  21 58.71   53 21.0   4.035   4.578   116   17.6  23:29 (180, 72)  
Sept. 5  21 55.13   52 26.5   4.034   4.610   119   17.7  22:57 (180, 73)  

* 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)  
Aug. 29  18 14.24   21  5.9   1.274   1.883   110   17.8  20:00 ( 14, 76)  
Sept. 5  18 18.18   17 56.2   1.271   1.847   107   17.7  19:49 ( 21, 72)  

* 6P/d'Arrest

Fading rapidly. Now it is 16.0 mag (July 26, Ken-ichi Kadota). It will be fainter than 18 mag in late August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   5 17.16    3 34.4   2.309   2.307    77   17.7   4:01 (299, 40)  
Sept. 5   5 24.18    3  0.2   2.275   2.357    81   18.2   4:07 (306, 44)  

* 220P/McNaught

Now it is 17.8 mag (Aug. 14, Space Surveillance Telescope, Atom Site). It will be observable at 17.5 mag in good condition in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   3 17.93    9 19.2   1.147   1.718   105   17.8   4:01 (333, 62)  
Sept. 5   3 25.63    8 53.0   1.118   1.746   110   17.9   4:07 (347, 63)  

* 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)  
Aug. 29   3 51.45   16 26.6   4.154   4.374    95   17.9   4:01 (309, 64)  
Sept. 5   3 53.47   16 31.9   4.041   4.366   102   17.8   4:07 (324, 68)  

* 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)  
Aug. 29  23 19.15  -13 28.8   1.390   2.385   166   18.0   0:54 (  0, 42)  
Sept. 5  23 11.96  -13  5.9   1.348   2.352   172   17.9   0:19 (  0, 42)  

* 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)  
Aug. 29   0 57.56   -0 15.3   2.034   2.894   141   18.0   2:31 (  0, 55)  
Sept. 5   0 55.61   -0 56.7   1.952   2.864   148   17.9   2:02 (  0, 54)  

* C/2012 LP26 ( Palomar )

Far object. Now it is 17.3 mag (Aug. 16, J. Oey, P. Camilleri, H. Williams). It keeps observable at 18 mag in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29  19 44.83   -5 13.8   5.737   6.537   139   17.9  21:16 (  0, 50)  
Sept. 5  19 44.13   -5 42.5   5.808   6.537   133   18.0  20:47 (  0, 49)  

* 205P/Giacobini

Now it is 19.2 mag (Aug. 26, W. Hasubick). First return of a comet re-discovered after 112-year blank in 2008. It brightened up to 12 mag in 2008. In this apparition, it was expected to brighten up to 15 mag from spring to summer, but it is much fainter than predicted.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Aug. 29   4 23.69   11 22.4   1.599   1.879    89   18.1   4:01 (305, 55)  
Sept. 5   4 32.86   10 30.1   1.567   1.917    93   18.2   4:07 (314, 58)  

* 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)  
Aug. 29  16 17.46   -8 47.2   0.195   1.025    88   18.5  20:00 ( 41, 37)  
Sept. 5  17 35.04   -6 10.2   0.184   1.059   101   18.4  19:49 ( 24, 46)  

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