Weekly Information about Bright Comets (2015 Dec. 5: North)

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 Updated on December 9, 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 6.2 mag (Dec. 4, Neil Norman). It was expected to brighten up to 4-5 mag from autumn to winter. However, the brightness evolution has stopped in September. In the Northern Hemisphere, it is appearing in the morning sky. It will be observable in excellent condition after this. In the Southern Hemisphere, it is hardly observable after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  14 18.54   -9  5.4   1.461   0.899    37    5.9   5:22 (295, 18)  
Dec. 12  14 17.90   -4 17.3   1.319   0.959    46    5.8   5:27 (297, 27)

* C/2014 S2 ( PanSTARRS )

It brightened very rapidly. Now it is so bright as 9.1 mag (Dec. 4, Maik Meyer). It is observable at 9-10 mag until 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)  
Dec.  5  16 44.31   64 28.6   1.913   2.101    86    9.3   5:22 (209, 28)  
Dec. 12  16 48.54   63 15.9   1.918   2.101    86    9.3   5:27 (212, 31)

* C/2013 X1 ( PanSTARRS )

Now it is so bright as 9.8 mag (Dec. 4, Maik Meyer). 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. It is observable in excellent condition in the Northern Hemispehre. It locates very low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   1 24.22   36 44.8   1.537   2.339   134   10.1  20:27 (180, 88)  
Dec. 12   0 56.36   32 38.0   1.572   2.266   123   10.0  19:32 (  0, 87)

* 10P/Tempel 2

It brightened very rapidly. Now it is bright as 9.2 mag (Nov. 30, Juan Jose Gonzalez). It keeps 11-13 mag until February. But it keeps very low. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  20  4.47  -24 57.2   1.933   1.434    45   11.5  18:18 ( 43, 16)  
Dec. 12  20 29.97  -24 13.0   1.971   1.448    44   11.6  18:19 ( 44, 16)

* 249P/LINEAR

Appearing in the evening sky. Now it is bright as 12.0-12.5 mag (Dec. 8, Michael Jager). It tends to brighten very rapidly around the perihelion passage. It will fade out very rapidly after this. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  18 36.40  -19 24.7   1.178   0.531    26   11.5  18:18 ( 62,  6)  
Dec. 12  19 32.79  -17 34.4   1.094   0.598    32   12.1  18:19 ( 59, 12)

* 22P/Kopff

Now it is bright as 9.7 mag (Nov. 30, Juan Jose Gonzalez). It is observable in the evening low sky until early December in the Southern Hemisphere, or until late December in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  19 18.36  -22 41.2   2.306   1.612    35   11.5  18:18 ( 53, 10)  
Dec. 12  19 41.16  -22  6.3   2.354   1.632    33   11.6  18:19 ( 54, 10)

* C/2014 W2 ( PanSTARRS )

Now it is bright as 12.4 mag (Nov. 20, Seiichi Yoshida). It keeps 12 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)  
Dec.  5  17 18.07   82 56.3   2.432   2.855   105   12.3  18:18 (171, 35)  
Dec. 12  18 15.07   80 10.2   2.433   2.830   103   12.3  18:19 (168, 36)

* 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. Now it is not detected, fainter than 20 mag (Oct. 2, Jean-Francois Soulier). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   9 14.79   31 59.5   1.107   1.811   119   13.1   4:22 (  0, 87)  
Dec. 12   9 24.62   32  4.9   1.028   1.781   124   12.6   4:04 (  0, 87)

* C/2014 Q2 ( Lovejoy )

It brightened up to 3.7 mag and became a naked eye comet in mid January in 2015 (Jan. 13, Marek Biely). Now it is fading. But it is bright as 11.9 mag still now (Nov. 25, Thomas Lehmann). In the Northern Hemisphere, it keeps observable for a long time until the comet fades out, although it becomes low temporarily in December. It is not observable until March in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  17 25.17   21 42.7   4.750   4.115    45   12.9  18:18 (106, 15)  
Dec. 12  17 32.07   21  8.4   4.831   4.184    44   13.0  18:19 (109, 10)

* 67P/Churyumov-Gerasimenko

Now it is 12.5 mag (Nov. 20, Seiichi Yoshida). It will be fading slowly after this. In the Northern Hemisphere, it keeps observable in good condition. It will be getting higher gradually after this also in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  11 50.11    9  5.6   1.735   1.813    78   13.3   5:22 (315, 56)  
Dec. 12  11 59.27    8 26.4   1.710   1.866    83   13.4   5:27 (324, 59)

* 29P/Schwassmann-Wachmann 1

It is not observable now. It will appear in the morning sky in February. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  18 13.97  -28 12.5   6.891   5.984    21   14.0  18:18 ( 58, -5)  
Dec. 12  18 20.18  -28  5.4   6.924   5.982    15   14.0  18:19 ( 62, -8)

* 116P/Wild 4

Now it is 14.9 mag (Nov. 13, Hidetaka Sato). It will 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)  
Dec.  5  13 20.41   -7 23.0   2.687   2.203    50   14.2   5:22 (305, 29)  
Dec. 12  13 33.54   -8 46.9   2.618   2.198    54   14.1   5:27 (310, 31)

* 81P/Wild 2

Now it is 15.8 mag (Nov. 20, K. Hills). It will brighten up to 11 mag from spring to summer. 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)  
Dec.  5   5 51.18   19 15.1   1.631   2.592   163   14.4   0:59 (  0, 74)  
Dec. 12   5 44.53   19 13.3   1.572   2.551   171   14.2   0:25 (  0, 74)

* C/2011 KP36 ( Spacewatch )

Now it is 14.8 mag (Nov. 22, Catalina Sky Survey). 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)  
Dec.  5  21 33.27   -7 52.2   5.280   5.043    70   14.6  18:18 ( 34, 41)  
Dec. 12  21 38.37   -7 48.8   5.367   5.031    65   14.7  18:19 ( 40, 38)

* 88P/Howell

It brightened up to 8.8 mag in 2015 spring (Apr. 3, Marco Goiato). Now it is fading. It has already faded down to 13.5 mag (Nov. 11, Mike Wolle). It keeps observable until March when the comet becomes fainter than 18 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   1 47.35    9 31.0   1.850   2.649   136   15.0  20:52 (  0, 65)  
Dec. 12   1 46.27    9 38.2   1.965   2.693   128   15.3  20:23 (  0, 65)

* 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 fading. It has already faded down to 12.9 mag (Oct. 3, 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)  
Dec.  5  17 13.43  -55 13.8   3.614   2.844    33   15.1  18:18 ( 40,-28)  
Dec. 12  17 30.67  -55 38.5   3.718   2.939    32   15.3  18:19 ( 40,-30)

* C/2015 G2 ( MASTER )

It brightened up to 6.0 mag in mid May (May 14, Chris Wyatt). Now it is fading. It has already faded down to 15.6 mag (Nov. 12, Sandor Szabo). 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)  
Dec.  5   7 13.97   35 11.9   2.252   3.109   144   15.2   2:22 (180, 90)  
Dec. 12   6 54.51   36 29.9   2.276   3.192   154   15.3   1:36 (180, 89)

* C/2015 F4 ( Jacques )

It brightened rapidly up to 10.4 mag from July to August (July 18, Maik Meyer). Now it is fading. It has already faded down to 14.2 mag (Nov. 11, Sandor Szabo). 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)  
Dec.  5  21 16.40   46 45.7   1.955   2.226    92   15.2  18:18 (128, 65)  
Dec. 12  21 36.46   46 49.3   2.036   2.284    91   15.5  18:19 (127, 64)

* 19P/Borrelly

Now it is 13.6 mag (Nov. 12, Sandor Szabo). In the Northern Hemisphere, 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)  
Dec.  5  13 26.11   20 23.4   2.655   2.398    64   15.2   5:22 (276, 46)  
Dec. 12  13 36.25   20 14.4   2.632   2.448    68   15.3   5:27 (281, 50)

* 230P/LINEAR

Now it is 14.0 mag and visible visually (Nov. 30, Chris Wyatt). Now it is passing near by the earth, and it is observable at 15 mag in excellent condition in December. It will fade out rapidly after January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   5 11.68   -3 15.3   0.548   1.496   153   15.4   0:20 (  0, 52)  
Dec. 12   5  9.54   -0 28.4   0.552   1.507   156   15.5  23:46 (  0, 55)

* C/2013 V4 ( Catalina )

Now it is 15.7 mag (Nov. 11, 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)  
Dec.  5   4 25.52   73 58.8   4.536   5.204   128   15.4  23:29 (180, 51)  
Dec. 12   4  7.27   74 29.4   4.547   5.209   127   15.5  22:43 (180, 50)

* 329P/2015 T1 ( LINEAR-Catalina )

First return of a periodic comet discovered in 2003. Now it is 15.5 mag (Nov. 15, Yuji Ohshima). It is brightening very rapidly. It will approach to the earth from autumn to winter, and it will brighten up to 15 mag and observable in excellent condition. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   4 48.58    6 33.1   0.689   1.660   164   15.6  23:52 (  0, 62)  
Dec. 12   4 43.91   10  4.8   0.690   1.661   165   15.5  23:20 (  0, 65)

* C/2014 N3 ( NEOWISE )

Now it is 15.1 mag (Nov. 11, Sandor Szabo). 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)  
Dec.  5   0 36.59   46 36.1   3.870   4.511   125   15.5  19:41 (180, 78)  
Dec. 12   0 33.07   46 21.9   3.969   4.541   119   15.6  19:10 (180, 79)

* C/2014 A4 ( SONEAR )

Now it is 15.4 mag (Nov. 15, Yuji Ohshima). It will be fading slowly after this. In the Northern Hemisphere, it keeps observable for a long time until the comet fades out. In the Southern Hemisphere, it will be unobservable in early January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   0 26.11   14 59.3   3.681   4.248   119   15.5  19:30 (  0, 70)  
Dec. 12   0 19.49   15  2.4   3.811   4.259   110   15.6  18:56 (  0, 70)

* 318P/2014 M6 ( McNaught-Hartley )

First return of a periodic comet discovered in 1994. It brightened up to 13.8 mag from summer to autumn (Sept. 7, Taras Prystavski). Now it is fading, but it is bright as 15.2 mag still now (Nov. 11, Sandor Szabo). 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)  
Dec.  5  23  5.32  -16 55.9   2.300   2.479    88   15.7  18:18 (  2, 38)  
Dec. 12  23 13.20  -15  3.3   2.392   2.490    84   15.8  18:19 (  9, 40)

* 61P/Shajn-Schaldach

Now it is 14.5 mag (Nov. 11, 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)  
Dec.  5   2  9.68    3 34.7   1.332   2.170   138   15.8  21:14 (  0, 59)  
Dec. 12   2 10.63    3 53.9   1.399   2.183   131   15.9  20:48 (  0, 59)

* C/2006 S3 ( LONEOS )

It brightened up to 11-12 mag in 2012. It has already faded down to 16.5 mag (July 9, Taras Prystavski). It is observable at 16 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  11 16.98   -7  5.5  10.699  10.565    79   16.3   5:22 (338, 45)  
Dec. 12  11 16.23   -7 10.9  10.614  10.603    86   16.3   5:27 (350, 47)

* P/2015 Q1 ( Scotti )

Brightening very rapidly, and it keeps brightening even after the perihelion passage. Now it is very bright as 15.5 mag (Nov. 21, Catalina Sky Survey). It keeps observable in excellent condition for a while. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   6 15.38  -13 49.9   1.071   1.916   137   16.3   1:23 (  0, 41)  
Dec. 12   6 10.48  -15  1.0   1.084   1.941   139   16.4   0:51 (  0, 40)

* C/2015 V2 ( Johnson )

Now it is 16.7 mag (Nov. 5, Masayuki Suzuki). It was reported as 15.8 mag visually (Nov. 12, Sandor Szabo). It is expected to brighten up to 7 mag in 2017 summer. In the Northern Hemisphere, it keeps observable in good condition until the highlight while the comet will be brightening. In the Southern Hemisphere, it is not observable until early 2017. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   8 15.02   59 26.8   5.567   6.217   127   16.7   3:23 (180, 66)  
Dec. 12   8 11.29   60 19.5   5.459   6.158   131   16.6   2:52 (180, 65)

* 117P/Helin-Roman-Alu 1

It brightened up to 13 mag in 2014. It is bright as 14.8 mag visually still now (Nov. 11, Sandor Szabo). It will be fading after this, and will be fainter than 18 mag in spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   0 54.81   -0 22.3   3.477   4.060   120   16.7  19:59 (  0, 55)  
Dec. 12   0 54.71   -0  5.1   3.588   4.075   113   16.8  19:32 (  0, 55)

* 118P/Shoemaker-Levy 4

Now it is 16.9 mag (Nov. 15, J. Bel). 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)  
Dec.  5   0 17.29   -7 16.6   1.975   2.472   108   16.8  19:22 (  0, 48)  
Dec. 12   0 20.46   -6 47.3   2.034   2.443   102   16.7  18:58 (  0, 48)

* 77P/Longmore

Now it is 17.5 mag (Nov. 13, Hidetaka Sato). It will brighten rapidly after this, and it will be observable at 14-15 mag in good condition from winter to summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  12 42.16    7 56.5   2.794   2.562    66   16.9   5:22 (300, 47)  
Dec. 12  12 51.09    6 39.8   2.694   2.544    70   16.8   5:27 (308, 50)

* C/2015 B2 ( PanSTARRS )

Now it is 17.0 mag (Nov. 3, A. Maury, J.-F. Soulier, J.-G. Bosch, T. Noel). It keeps 16.5 mag for a long time in 2016, and it will be observable in excellent condition in the Southern Hemisphere. It is hardly observable in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   8 17.96  -57  4.8   3.545   3.660    88   16.9   3:25 (  0, -2)  
Dec. 12   7 59.99  -59 23.4   3.486   3.636    90   16.8   2:40 (  0, -4)

* C/2015 GX ( PanSTARRS )

Now it is 16.0 mag (Nov. 12, Sandor Szabo). It is observable at 16-17 mag in good condition from October to December 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)  
Dec.  5   1 11.18   54  8.4   1.519   2.275   129   16.8  20:16 (180, 71)  
Dec. 12   1 13.21   47 52.2   1.588   2.314   126   17.0  19:51 (180, 77)

* 204P/LINEAR-NEAT

Now it is 17.3 mag (Nov. 21, Catalina Sky Survey). It is observable at 16.5 mag in excellent condition from December to February. It locates somewhat low in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   8 29.27   17 29.8   1.170   1.930   126   17.3   3:36 (  0, 72)  
Dec. 12   8 33.32   17 49.0   1.117   1.930   133   17.1   3:13 (  0, 73)

* 65P/Gunn

Now it is 16.9 mag (Nov. 17, J. Nicolas, C. Rinner, F. Kugel, A. Klotz). It will brighten up to 14 mag in 2017. In 2016, it keeps observable at 16 mag in good condition from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  11 51.56   10 44.4   4.155   4.077    78   17.2   5:22 (312, 57)  
Dec. 12  11 55.85   10 31.2   4.034   4.063    84   17.1   5:27 (324, 61)

* C/2015 T4 ( PanSTARRS )

Now it is 17.1 mag (Nov. 17, K. Hills). It will brighten up to 16 mag in 2016 summer. In the Southern Hemisphere, it keeps observable in good condition for a long time. In the Northern Hemisphere, it is observable only until next March. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   5  5.58  -15 57.9   2.306   3.137   141   17.3   0:14 (  0, 39)  
Dec. 12   4 54.24  -18 26.3   2.283   3.088   138   17.2  23:30 (  0, 36)

* 74P/Smirnova-Chernykh

Now it is 17.2 mag (Nov. 18, Catalina Sky Survey). 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)  
Dec.  5   3 20.32   15 15.8   3.324   4.260   159   17.2  22:24 (  0, 70)  
Dec. 12   3 16.39   15  9.6   3.362   4.251   151   17.2  21:53 (  0, 70)

* 211P/Hill

Now it is 17.4 mag (Nov. 21, Space Surveillance Telescope, Atom Site). It is observable at 17 mag in good condition in winter. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   8 23.19   13 29.4   1.647   2.376   127   17.3   3:31 (  0, 68)  
Dec. 12   8 24.20   14 15.1   1.575   2.370   134   17.2   3:04 (  0, 69)

* C/2015 K1 ( MASTER )

Now it is 16.9 mag (Nov. 14, J. Bel). 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)  
Dec.  5  23 55.74    3 53.9   4.454   4.853   108   17.4  19:01 (  0, 59)  
Dec. 12  23 56.61    4 15.3   4.614   4.906   101   17.5  18:34 (  0, 59)

* 44P/Reinmuth 2

Now it is 16.8 mag (Nov. 20, Catalina Sky Survey). It keeps observable in good condition for a while. But it will be fainter than 18 mag in January. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   3 46.97   26  6.8   1.838   2.806   166   17.4  22:51 (  0, 81)  
Dec. 12   3 41.86   25 33.0   1.895   2.835   158   17.5  22:18 (  0, 81)

* C/2014 B1 ( Schwartz )

Now it is 17.2 mag (Nov. 7, K. Sarneczky). It keeps 17.5 mag for a long time from 2016 to 2019. It keeps locating near by the equator. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   8 15.56   -0 57.6   9.629  10.203   123   17.5   3:23 (  0, 54)  
Dec. 12   8 14.79   -0 59.4   9.530  10.190   129   17.5   2:55 (  0, 54)

* 162P/Siding Spring

Now it is 17.1 mag (Nov. 17, K. Hills). 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)  
Dec.  5  11 22.43   43  8.5   1.613   2.008    98   17.5   5:22 (233, 75)  
Dec. 12  11 29.40   44  7.1   1.598   2.059   103   17.5   5:27 (218, 78)

* 151P/Helin

Now it is 17.5 mag (Oct. 28, Yasukazu Ikari). It will be fading after this. It will be fainter than 18 mag at the end of 2015. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  23 48.97   -6 11.0   2.113   2.519   102   17.5  18:54 (  0, 49)  
Dec. 12  23 55.77   -5 22.8   2.207   2.531    97   17.7  18:33 (  0, 50)

* 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 17.6 mag (Nov. 13, E. Bryssinck). 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)  
Dec.  5   3 24.04   47 51.9   9.990  10.854   149   17.7  22:28 (180, 77)  
Dec. 12   3 20.88   47 50.2   9.995  10.830   146   17.7  21:58 (180, 77)

* C/2013 G9 ( Tenagra )

It brightened up to 16 mag in early 2015. Now it is fading. It is observable at 18 mag from winter to spring. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  10 44.04  -22 40.4   5.916   5.851    81   17.7   5:22 (352, 32)  
Dec. 12  10 40.48  -23 12.7   5.819   5.872    88   17.7   5:20 (  0, 32)

* C/2014 Y1 ( PanSTARRS )

Now it is 17.7 mag (Nov. 30, Hidetaka Sato). It was expected to brighten up to 14 mag from winter to summer. But it is much fainter actually. It will be 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)  
Dec.  5  13 31.18   -6  3.8   2.820   2.297    49   17.8   5:22 (302, 28)  
Dec. 12  13 44.61   -7 54.8   2.746   2.281    52   17.8   5:27 (307, 30)

* C/2015 TQ209 ( LINEAR )

Now it is 17.8 mag (Nov. 18, M. Adamovsky). It will brighten up to 13 mag in 2016 summer. But it is not observable around the highlight. In the Southern Hemisphere, it is observable until February when it brightens up to 17 mag. In the Northern Hemisphere, it is observable until April when it brightens up to 16 mag. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5   2  0.60   12 44.6   2.849   3.661   140   17.9  21:05 (  0, 68)  
Dec. 12   1 57.30   12 12.2   2.855   3.591   132   17.8  20:34 (  0, 67)

* C/2012 K8 ( Lemmon )

It keeps 17-18 mag for a long time since 2013. In the Northern Hemisphere, it is observable at 18 mag in good condition also in this winter. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec.  5  14 25.73   52 32.9   7.294   7.199    80   17.9   5:22 (228, 43)  
Dec. 12  14 27.33   53  1.1   7.252   7.219    84   17.9   5:27 (227, 48)

* 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 20.1 mag (Oct. 15, Pan-STARRS 1, Haleakala). The fragment D and B are also observed as 18.6 mag (Oct. 31, Catalina Sky Survey) 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)  
Dec.  5   1 58.83    6 30.1   1.174   2.013   137   20.4  21:03 (  0, 62)  
Dec. 12   2  0.94    7 21.8   1.260   2.047   131   20.6  20:38 (  0, 63)

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