Weekly Information about Bright Comets (2013 July 27: South)

Japanese version
Home page
Updated on July 28, 2013
Last week North Next week

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.

---------------------------------------------------------------------

* C/2012 F6 ( Lemmon )

It approached to the sun down to 0.73 A.U. on Mar. 24, and brightened up to 4.7 mag (Mar. 11, Michael Mattiazzo). Now it is fading. But it is still bright as 9.2 mag (July 18, Juan Jose Gonzalez). In the Northern Hemisphere, it keeps observable in good condition while fading gradually. 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 27  22 25.32   68 26.2   1.999   2.236    89    9.3   2:09 (180,-13)  
Aug.  3  21 44.22   70  1.0   2.062   2.329    91    9.5   1:00 (180,-15)  

* 46P/Wirtanen

The condition is worst and the comet will be hardly observable in this apparition. In the Northern Hemisphere, it will be observable in autumn when the comet will be fainter than 16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   7 31.40   23 34.3   2.042   1.079    13   10.2   5:30 (248,-10)  
Aug.  3   8  2.00   23  6.4   2.068   1.103    13   10.3   5:26 (249,-11)  

* C/2011 L4 ( PanSTARRS )

It passed the perihelion on Mar. 10, and brightened up to 0-1 mag. Now it is fading. It has already faded down to 10.8 mag (July 18, Juan Jose Gonzalez). It is observable in good condition in the Northern Hemisphere. It will be observable in the extremely low sky from mid August to mid September also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  14 37.79   53 41.1   2.731   2.681    76   11.5  18:42 (176,  1)  
Aug.  3  14 42.26   50 39.1   2.864   2.778    74   11.7  18:46 (172,  4)  

* 26P/Grigg-Skjellerup

Brightening very rapidly near the perihelion as predicted. Now it is 13.3 mag and already visible visually (July 8, Chris Wyatt). It will reach up to 12 mag in the evening sky from July to August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  12 24.57    6 38.5   1.218   1.121    59   12.0  18:42 (131, 35)  
Aug.  3  12 55.38    5 53.1   1.235   1.147    60   12.3  18:46 (130, 35)  

* C/2012 V2 ( LINEAR )

It brightened up to 13.6 mag until spring (May 5, Hiroshi Abe). It will brighten up to 12 mag from summer to autumn. In the Southern Hemisphere, it is appearing in the morning sky again. It will keep observable in good condition for a long time until 2014 summer when the comet fades out. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   6 58.24   10 37.2   2.368   1.484    22   12.6   5:30 (254,  4)  
Aug.  3   7 14.80    6 57.9   2.310   1.468    26   12.5   5:26 (256,  8)  

* C/2013 N4 ( Borisov )

New bright comet discovered in the extremely low sky at dawn. Now it is 11.0 mag (July 18, Juan Jose Gonzalez). It keeps 12-13 mag until autumn, but it keeps locating extremely low in the morning sky. It is not observable until November in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   7 10.29   41 48.5   2.074   1.264    27   12.6   5:30 (230,-16)  
Aug.  3   7 43.65   39 10.6   2.060   1.235    26   12.5   5:26 (233,-16)  

* C/2012 S1 ( ISON )

It is expected to be a great comet in 2013 autumn when the comet approaches to the sun down to only 0.01 A.U. It keeps visible with naked eyes from November to January, and can be extremely bright as Venus or more at the highlight. However, the brightening has declined at 15.5 mag from January through May in 2013. Now it is not observable. The condition is excellent in the Northern Hemisphere. It will appear in the morning sky again in late August, then it keeps observable almost all through the period of brightening, at the highlight, and of fading. The condition is not good in the Southern Hemisphere. It is not observable at all the latter part of the highlight, and it keeps low all through the period.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   7 53.98   25 17.0   3.732   2.735     9   12.7   5:30 (249,-15)  
Aug.  3   8  2.46   24 46.8   3.606   2.631    13   12.5   5:26 (248,-12)  

* C/2012 L2 ( LINEAR )

Now it is so bright as 11.2 mag (July 3, Con Stoitsis). In the Southern Hemisphere, it keeps observable for a long time until the comet fades out, although it keeps locating low. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   8  9.19  -26 13.5   2.417   1.855    45   13.1   5:30 (294, 11)  
Aug.  3   8 27.31  -29 26.2   2.445   1.910    47   13.3   5:26 (297, 14)  

* 246P/2010 V2 ( NEAT )

It brightened up to 12 mag in 2012. It is bright as 13.3 mag still now (July 1, Hidetaka Sato). It keeps 13-14 mag until autumn. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  19 27.71  -35 44.6   2.063   3.034   159   13.1  23:06 (  0, 89)  
Aug.  3  19 22.97  -36  7.4   2.107   3.045   152   13.2  22:34 (  0, 89)  

* C/2010 S1 ( LINEAR )

Now it is 13.1 mag (July 13, D. Sidorko). It keeps bright at 13-14 mag for a long time until 2014. It keeps observable for a long time 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 27  20 11.29   30 45.7   5.217   5.919   129   13.2  23:49 (180, 24)  
Aug.  3  20  3.50   29 48.2   5.206   5.923   131   13.2  23:14 (180, 25)  

* C/2006 S3 ( LONEOS )

It brightened up to 11-12 mag in 2012. Now it is bright as 13.7 mag (July 24, Taras Prystavski). It keeps observable until July in the Northern Hemisphere, or until September in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  13 11.49   -9 55.0   6.367   6.205    76   13.4  18:42 (128, 54)  
Aug.  3  13 10.70   -9 56.1   6.517   6.234    69   13.5  18:46 (119, 49)  

* C/2013 G5 ( Catalina )

Now it is 16.9 mag (June 9, Hidetaka Sato). It will approach to the Sun down to 0.9 A.U., and to the Earth down to 0.4 A.U. in September. So it was expected to brighten up to 11-12 mag. However, it looks extremely diffuse on July 12 by Michael Jager. So the comet can be already disintegrated. In the Northern Hemisphere, it keeps observable in good condition until mid September. In the Southern Hemisphre, it will getting higher after August, and it keeps observable in good condition after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  13 52.10   39 37.1   0.904   1.127    71   14.3  18:42 (166, 14)  
Aug.  3  14  2.92   35 47.6   0.819   1.064    69   13.8  18:46 (161, 16)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.2 mag (July 24, Taras Prystavski).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  13 40.34  -20 30.7   6.177   6.204    86   13.9  18:42 (123, 67)  
Aug.  3  13 42.80  -20 33.8   6.285   6.203    80   13.9  18:46 (113, 62)  

* C/2011 J2 ( LINEAR )

Now it is 14.5 mag (June 11, Sandor Szabo). It keeps 13 mag and observable in good condition in the Northern Hemisphere for a long time from 2013 to 2014. But it locates low in July and August. In the Southern Hemisphere, it is not observable until 2014 autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   9 26.46   51  8.2   4.512   3.715    34   14.0  18:42 (137,-23)  
Aug.  3   9 32.31   51 30.2   4.478   3.691    34   13.9  18:46 (136,-27)  

* (596) Scheila

Big asteroid discovered in 1906. It suddenly showed the cometary activity on Dec. 11, 2010, probably due to an impact of a small object. It has already turned to be stellar.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   1  4.33  -12 27.5   2.422   2.969   112   14.1   4:46 (180, 67)  
Aug.  3   1  5.73  -12 53.2   2.353   2.980   118   14.0   4:20 (180, 68)  

* C/2012 S3 ( PanSTARRS )

Now it is 15.5 mag (July 16, Sandor Szabo). It brightens up to 14 mag in July and August. In the Southern Hemisphere, it keeps observable for a long time until the comet fades out. It keeps observable in good condition until September also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  20 18.76   -2 56.0   1.350   2.342   163   14.3   0:02 (180, 58)  
Aug.  3  19 55.50   -8 42.3   1.339   2.330   163   14.3  23:05 (180, 64)  

* C/2012 K1 ( PanSTARRS )

Now it is 14.3 mag and visible visually (July 8, Gabor Santa and Krisztian Sarneczky). It is expected to brighten up to 5-6 mag in 2014 autumn. In 2013, it keeps observable in good condition until autumn when it brigthens up to 13-14 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  15 51.63   20 14.7   4.781   5.094   102   14.5  19:30 (180, 35)  
Aug.  3  15 47.17   19 40.0   4.812   5.027    96   14.4  18:58 (180, 35)  

* C/2013 E2 ( Iwamoto )

Now it is bright as 13.8 mag (July 16, Sandor Szabo). It keeps locating in the morning sky for a long time. I will keep the current brightness for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   1 20.07   10 55.1   1.953   2.372   101   14.7   5:02 (180, 44)  
Aug.  3   1 22.66   10 15.7   1.934   2.442   107   14.8   4:37 (180, 45)  

* 117P/Helin-Roman-Alu 1

Now it is 14.3 mag (July 8, Chris Wyatt). It keeps bright as 13-14 mag for a long time from 2013 to 2014.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  14 14.61  -12 37.3   3.082   3.274    91   14.7  18:42 (151, 65)  
Aug.  3  14 19.08  -13 14.2   3.168   3.263    86   14.7  18:46 (137, 63)  

* P/2013 CU129 ( PanSTARRS )

It will approach to the sun down to 0.8 a.u. on Aug. 6. Brightening very rapidly. Now it is bright as 15.3 mag (July 24, Hidetaka Sato). In the Southern Hemisphere, it keeps observable at 15 mag in good condition in the evening sky until September. It is not observable in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  11 26.31    1 18.9   1.007   0.820    47   15.5  18:42 (114, 28)  
Aug.  3  11 49.43   -3 38.1   0.930   0.803    48   15.2  18:46 (108, 30)  

* C/2009 F4 ( McNaught )

Few observations have been reported recently. It keeps 15 mag in 2013. It is observable in good condition in the Southern Hemisphere. It will be observable in good condition also in the Northern Hemisphere after August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   4  9.60  -23 31.8   7.027   6.844    75   15.2   5:30 (259, 57)  
Aug.  3   4 11.07  -23 37.6   6.976   6.874    80   15.2   5:26 (254, 62)  

* 63P/Wild 1

Outbursts occured repeatedly in this apparition. Another outburst occured in late July. Now it is very bright as 13.1 mag (July 24, Hidetaka Sato). It is observable in good condition in the evening sky in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere, and will be unobservable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  12  8.17  -11 41.1   2.480   2.213    63   15.2  18:42 (110, 44)  
Aug.  3  12 20.61  -13 26.2   2.574   2.245    59   15.5  18:46 (104, 42)  

* C/2011 R1 ( McNaught )

It kept bright as 11-13 mag for a long time from 2012 summer to 2013 summer. It will be fading after this. Now it is 14.8 mag (July 8, Sandor Szabo). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. In the Southern Hemisphere, it becomes low in late August, then it will be hardly observable.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  13 18.18   20 58.9   4.010   3.753    68   15.3  18:42 (152, 29)  
Aug.  3  13 20.04   20 53.6   4.167   3.812    62   15.4  18:46 (145, 26)  

* 290P/2013 N1 ( Jager )

First return of a new periodic comet discovered in 1998. It brightened up to 10 mag at the discovery. Now it is 17.5 mag (July 12, K. Sarneczky, G. Marschalko). In the Northern Hemisphere, it keeps observable in excellent condition from autumn to spring. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   4 20.37   37 19.0   3.423   2.974    55   15.5   5:30 (210, 10)  
Aug.  3   4 32.80   37 53.9   3.312   2.934    59   15.3   5:26 (208, 10)  

* 154P/Brewington

Not observed yet in this apparition. It will brighten very rapidly near the perihelion passage. It is expected to reach up to 10 mag from autumn to winter. But actually, it is not detected, fainter than 20.5 mag on July 6 (Hidetaka Sato). In the Northern Hemipshere, it keeps observable in excellent condition until the comet fades out. In the Southern Hemisphere, it keeps observable in good condition within 2013, but it will not be observable in 2014.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  23  2.23  -17 35.1   1.279   2.176   142   15.7   2:44 (180, 73)  
Aug.  3  23  0.16  -16 58.9   1.193   2.130   149   15.5   2:15 (180, 72)  

* P/2013 J2 ( McNaught )

Now it is 15.3 mag and visible visually (July 16, Sandor Szabo). It brightens up to 15.5 mag and will be observable in excellent condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  21 34.85   -1  0.9   1.200   2.163   155   15.6   1:17 (180, 56)  
Aug.  3  21 31.04    0 12.3   1.175   2.156   159   15.6   0:46 (180, 55)  

* C/2012 K6 ( McNaught )

Now it is 14.0 mag and visible visually (June 11, Sandor Szabo). It reaches up to 14-15 mag from spring to summer. 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 27  12 48.51   -9 43.3   3.603   3.411    71   15.8  18:42 (121, 50)  
Aug.  3  12 49.59   -8 36.9   3.742   3.423    64   15.9  18:46 (115, 44)  

* C/2013 G6 ( Lemmon )

It brightened very rapidly. Now it is so bright as 14.0 mag (July 1, Hidetaka Sato). It keeps observable in good condition for a while in the Southern Hemipshere. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  11  3.23  -20 31.8   2.445   2.049    55   15.9  18:42 ( 89, 36)  
Aug.  3  11  0.87  -21 12.9   2.551   2.051    49   16.0  18:46 ( 83, 29)  

* C/2011 F1 ( LINEAR )

It brightened up to 9.0 mag in 2012 autumn (Nov. 4, Juan Jose Gonzalez). However, it faded out unexpectedly around the perihelion passage. Now it is fainter than originally predicted by 4-5 mag. Now it is 15.2 mag (June 3, Hidetaka Sato). In the Southern Hemisphere, it keeps observable in good condition while fading slowly after this. 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 27   3 48.01  -45 12.3   2.846   3.020    89   16.1   5:30 (303, 65)  
Aug.  3   3 54.57  -46  0.1   2.870   3.082    92   16.2   5:26 (307, 68)  

* 257P/2012 F4 ( Catalina )

Now it is 17.1 mag (June 8, Ken-ichi Kadota). It is expected to be observable at 16 mag in good condition in summer and autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   0 22.05   22 20.0   1.616   2.167   108   16.5   4:04 (180, 33)  
Aug.  3   0 26.67   22 37.4   1.558   2.178   113   16.5   3:41 (180, 32)  

* 98P/Takamizawa

Brightening extremely rapidly. Now it is bright as 15.4 mag (July 15, J. Nicolas, F. Kugel). It will be observable at 16 mag in excellent condition in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  15 28.33  -10 54.8   1.051   1.676   108   16.6  19:08 (180, 66)  
Aug.  3  15 39.58  -12 57.6   1.095   1.674   104   16.6  18:52 (180, 68)  

* P/2012 F2 ( PanSTARRS )

Now it is 16.4 mag (July 12, W. Hasubick). It keeps observable in good condition at 17 mag from spring to summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  18 24.47   -5  4.1   2.100   3.005   147   16.6  22:03 (180, 60)  
Aug.  3  18 22.70   -5 13.3   2.159   3.019   141   16.7  21:34 (180, 60)  

* C/2013 A1 ( Siding Spring )

Now it is 16.8 mag (July 24, Hidetaka Sato). It is expected to brighten up to 7.5 mag and to be observable in excellent condition from summer to autumn in 2014 in the Southern Hemisphere. The condition is bad in the Northern Hemisphere. It will pass extremely close to Mars in 2014 October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   5 27.67  -16 20.5   5.954   5.457    56   16.9   5:30 (264, 38)  
Aug.  3   5 30.28  -17  0.3   5.819   5.394    60   16.8   5:26 (261, 42)  

* C/2011 O1 ( LINEAR )

Now it is 17.1 mag (July 12, Hidetaka Sato). In the Southern Hemisphere, it keeps observable in good condition for a long time while fading gradually. 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 27   5 28.03  -41  4.1   5.064   4.864    72   16.9   5:30 (295, 47)  
Aug.  3   5 33.47  -41 11.4   5.069   4.899    74   16.9   5:26 (294, 50)  

* P/2005 L1 ( McNaught )

First return of a new periodic comet discovered in 2005. It was expected to be observable at 17 mag for a long time from 2013 to 2014. However, it has not been recovered yet. Actually, it is much fainter than predicted, fainter than 20.5 mag (June 8, Danilo Pivato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  16 39.73  -14  8.2   2.499   3.203   126   17.1  20:19 (180, 69)  
Aug.  3  16 40.00  -14 31.7   2.573   3.198   119   17.2  19:52 (180, 70)  

* 102P/Shoemaker 1

Now it is 18.1 mag (June 13, Mt. Lemmon Survey). It is brighter than originally expected by 1 mag. It will brighten up to 16.5 mag and will be observable in good condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   0 35.94    6  7.9   1.359   1.992   113   17.4   4:17 (180, 49)  
Aug.  3   0 38.07    8 40.1   1.289   1.984   118   17.2   3:52 (180, 46)  

* C/2012 S4 ( PanSTARRS )

It was observed at 18 mag in 2012. It will be observable at 17 mag in excellent condition in 2013.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   0 30.81   14 59.7   3.894   4.355   110   17.3   4:13 (180, 40)  
Aug.  3   0 26.14   13 47.1   3.780   4.359   118   17.3   3:40 (180, 41)  

* C/2012 C1 ( McNaught )

Now it is 17.4 mag (June 15, K. Hills). It keeps 17 mag for a long time from 2012 to 2013, and will be observable in good condition in the Southern Hemisphere. 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 27   1 44.48  -73 10.0   4.561   5.021   111   17.3   5:26 (  0, 52)  
Aug.  3   1 26.63  -74 35.5   4.558   5.035   112   17.3   4:41 (  0, 51)  

* C/2012 A2 ( LINEAR )

It was observed at 15-16 mag in 2012. Now it is fading. It has already faded down to 16.9 mag (June 30, J. F. Soulier). It will be fainter than 18 mag in autumn. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   2 14.83   38 23.6   4.312   4.257    80   17.4   5:30 (185, 16)  
Aug.  3   2 12.02   38  6.0   4.225   4.291    86   17.4   5:26 (180, 17)  

* 152P/Helin-Lawrence

It brightened up to 15.5 mag in 2012 summer. Although it has already passed the perihelion, it tends to become brightest after the perihelion passage. Now it is 18.6 mag, fainter than this ephemeris (June 20, A. Maury, J. F. Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  22 34.55  -20 20.4   2.769   3.681   149   17.5   2:17 (180, 75)  
Aug.  3  22 31.32  -20 57.0   2.746   3.698   156   17.6   1:46 (180, 76)  

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

Now it is 17.4 mag (June 29, Jean-Francois Soulier). It has brightened in outburst up to 14 mag twice, in 2006 January and 2011 May. It will pass the perihelion in 2015. 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)  
July 27  18 57.14  -18  5.6   5.580   6.539   159   17.6  22:36 (180, 73)  
Aug.  3  18 54.78  -18 12.0   5.611   6.524   152   17.7  22:06 (180, 73)  

* 119P/Parker-Hartley

It keeps 17 mag for a long time from 2013 summer to early 2015.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   1 58.88   16 31.3   3.124   3.294    90   17.7   5:30 (183, 38)  
Aug.  3   2  3.59   16 59.2   3.015   3.280    96   17.6   5:17 (180, 38)  

* C/2012 Q1 ( Kowalski )

Because it is a very distant comet, it will be fading very slowly. It keeps observable at 17.5 mag in 2013.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  23 24.23   11  3.8   9.136   9.774   126   17.7   3:06 (180, 44)  
Aug.  3  23 23.31   10 52.3   9.060   9.781   133   17.7   2:38 (180, 44)  

* C/2011 KP36 ( Spacewatch )

Now it is 17.7 mag (June 10, P. Lindner). It is expected to brighten up to 14 mag from 2015 to 2016.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  17 39.52   -2 30.6   7.765   8.527   136   17.8  21:18 (180, 58)  
Aug.  3  17 38.12   -2 42.1   7.803   8.493   130   17.8  20:49 (180, 58)  

* C/2010 U3 ( Boattini )

It will brighten up to 14 mag around the perihelion passage in 2019. In 2013, it will be observable in good condition at 17.5 mag from summer to winter. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   3 10.60   25 21.4  14.475  14.193    71   17.8   5:30 (201, 27)  
Aug.  3   3 11.28   25 34.6  14.333  14.164    78   17.8   5:26 (195, 28)  

* C/2008 S3 ( Boattini )

It has been observed at 17 mag for a long time from 2009 to 2012. It is also observable at 18 mag in good condition in 2013.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  22  1.05    8  6.1   8.441   9.280   143   17.8   1:43 (180, 47)  
Aug.  3  21 56.81    7 50.1   8.408   9.301   150   17.8   1:12 (180, 47)  

* 17P/Holmes

It brightened up to 2 mag by unusual major outburst in 2007. It was observed around aphelion at 22 mag. It will return in 2014. It will be 14 mag at best by normal prediction. Now it is 16.6 mag, brighter than this ephemeris (July 17, A. Maury, J. F. Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  16 52.54  -44 26.8   1.967   2.727   129   17.9  20:32 (  0, 81)  
Aug.  3  16 51.52  -43 19.7   2.001   2.697   123   17.9  20:03 (  0, 82)  

* C/2012 K8 ( Lemmon )

It keeps observable at 18 mag for a long time from 2013 to 2016. It keeps locating high in the Northern Hemisphere. It keeps locating very low in the Southern Hemipshere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  19 15.77   26 49.9   6.264   6.972   130   17.9  22:54 (180, 28)  
Aug.  3  19  9.78   26 56.2   6.271   6.954   129   17.9  22:20 (180, 28)  

* 289P/Blanpain

It was discovered in 1819, and re-discovered in 2003. Although it was predicted to be extremely faint as 26 mag, it unusually brightened up to 17.5 mag in outburst (July 6, Hidetaka Sato). It will pass the perihelion in 2014 August, and will approach to the sun down to 0.96 a.u. The brightness is predicted to be 23 mag at best. However, if the cometary activity continues, it may be observed brighter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  19 20.50  -27 40.6   2.791   3.774   162   18.3  22:59 (180, 83)  
Aug.  3  19 13.71  -27 53.0   2.793   3.738   155   18.5  22:24 (180, 83)  

* 184P/Lovas 2

Although it was expected to be bright as 16 mag, actually it was so faint as 19.3 mag, fainter than expected by 3 mag (July 3, Hidetaka Sato). It will be observable in good condition from summer to autumn, however, it will be only 19 mag at best.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   2 31.77   16 58.0   1.088   1.394    82   18.6   5:30 (193, 37)  
Aug.  3   2 53.14   18 39.6   1.064   1.395    84   18.6   5:26 (192, 35)  

* 91P/Russell 3

It was predicted to be 17 mag. But actually, it is much fainter, 19.1 mag (June 30, J. Gonzalez.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  17 48.46  -12 17.8   1.893   2.763   141   18.8  21:27 (180, 67)  
Aug.  3  17 47.24  -12  9.5   1.964   2.776   135   18.9  20:59 (180, 67)  

* 292P/2013 O1 ( Li )

First return of a new periodic comet discovered in 1998. Now it is 18.6 mag (July 24, Siding Spring Survey). It is fainter than originally expected by 2 mag. It was expected to be observable at 15.5 mag in good condition from 2013 autumn to early 2014. But actually, it will be 17 mag at best.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27   1 51.77  -19  9.7   2.556   2.966   103   19.0   5:30 (182, 74)  
Aug.  3   1 57.70  -19 39.1   2.457   2.938   108   18.8   5:11 (180, 75)  

* C/2012 V1 ( PanSTARRS )

It was expected to brighten up to 15 mag in 2013 summer. But actually, it is so faint as 19.5 mag, fainter than expected by 4 mag (July 2, J. F. Soulier).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
July 27  21 25.64   18 32.6   1.213   2.091   139   18.9   1:10 (180, 36)  
Aug.  3  20 42.42   14 45.7   1.167   2.095   147   18.9  23:49 (180, 41)  

---------------------------------------------------------------------

Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.