Weekly Information about Bright Comets (2018 Dec. 29: North)

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Updated on December 31, 2018
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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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* 46P/Wirtanen

It approached to Earth down to 0.08 a.u. in mid December, and it brightened up to 3.4 mag (Dec. 14, Seiichi Yoshida). it looked so large as 3 times of Moon. Now it is fading. But it is very bright as 4.4 mag still now (Dec. 21, Marco Goiato). In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is not observable until February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   6 28.00   54 38.0   0.109   1.078   148    3.8  23:52 (180, 71)  
Jan.  5   7 44.65   59  4.1   0.143   1.100   142    4.5   0:47 (180, 66)  

* 64P/Swift-Gehrels

Now it is very bright as 9.0 mag (Dec. 14, Juan Jose Gonzalez). It is observable in excellent condition in the Northern Hemisphere. It stays low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   2 50.18   30 18.1   0.706   1.540   130    9.4  20:20 (  0, 85)  
Jan.  5   3  7.13   29 23.5   0.771   1.577   127    9.7  20:10 (  0, 84)  

* 38P/Stephan-Oterma

Now it is bright as 9.5 mag (Dec. 14, Marco Goiato). It stays 9-10 mag until January. In the Northern Hemisphere, it stays observable in good condition for a long time until it fades out. It locates low in the Southern Hemispehre.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   8 34.55   39 43.5   0.779   1.699   149    9.7   2:07 (180, 85)  
Jan.  5   8 35.48   42  6.4   0.800   1.732   152   10.0   1:40 (180, 83)  

* C/2018 L2 ( ATLAS )

Now it is 10.1 mag (Dec. 4, Thomas Lehmann). It stays at 11 mag until February. In the Northern Hemisphere, it stays observable for a long time until it fades out. But it stays extremely low. It will never be observable again in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  18 46.06   17 44.4   2.362   1.746    41   10.9  18:27 (106,  8)  
Jan.  5  19  7.35   20  9.0   2.356   1.767    42   11.0  18:32 (110,  7)  

* C/2016 M1 ( PanSTARRS )

It brightened up to 7.7 mag in June (June 19, Juan Jose Gonzalez). Now it is fading. But it is still bright as 10.6 mag (Dec. 7, Chris Wyatt). In the Southern Hemisphere, it stays observable in good condition for a long time until the comet will fade out. In the Northern Hemisphere, it is not observable for a long time until autumn in 2019 when the comet fades out down to 16 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  19 35.53  -85 54.7   3.032   2.727    62   11.4  18:27 (  5,-34)  
Jan.  5  22 37.88  -85 54.1   3.041   2.772    64   11.6  18:32 (  3,-32)  

* C/2018 Y1 ( Iwamoto )

Bright new comet. Now it is 12.3 mag (Dec. 23, Ken-ichi Kadota). It will approach to Earth down to 0.3 a.u. in February. Then it will brighten up to 8.5 mag and will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  14 16.22  -24 12.9   1.670   1.413    57   12.6   5:36 (327, 23)  
Jan.  5  14 13.08  -23 38.0   1.449   1.372    65   12.2   5:38 (335, 27)  

* C/2016 N6 ( PanSTARRS )

Now it is 11.5 mag (Dec. 14, Juan Jose Gonzalez). It stays 12 mag for a long time until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   7 27.87  -17 34.0   2.373   3.163   136   12.4   1:01 (  0, 37)  
Jan.  5   7 11.71  -19 12.0   2.402   3.201   138   12.5   0:17 (  0, 36)  

* 78P/Gehrels 2

Now it is 13.3 mag (Dec. 5, Sandor Szabo). It stays at 12-13 mag for a long time until autumn in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  22 47.53   -5  6.4   2.390   2.156    64   12.9  18:27 ( 44, 40)  
Jan.  5  22 59.99   -4  8.7   2.442   2.137    60   12.8  18:32 ( 50, 38)  

* C/2016 R2 ( PanSTARRS )

Now it is 13.1 mag (Dec. 4, Thomas Lehmann). It will be fading slowly after this. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  15 20.07   40 33.3   3.624   3.546    77   12.9   5:36 (247, 52)  
Jan.  5  15 29.01   40 42.7   3.626   3.593    80   13.0   5:38 (247, 55)  

* C/2018 N2 ( ASASSN )

Now it is 14.0 mag (Nov. 26, Chris Wyatt). It will brighten up to 10-11 mag in autumn in 2019. It stays observable in good condition for a while in the Southern Hemisphere. In the Northern Hemisphere, it stays extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   1  4.77  -34 55.4   4.322   4.322    83   13.5  18:34 (  0, 20)  
Jan.  5   1  3.09  -33  3.7   4.370   4.279    78   13.5  18:32 (  6, 22)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.9 mag (Dec. 5, Sandor Szabo).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  22 57.60   -0  6.0   6.050   5.768    68   13.6  18:27 ( 45, 45)  
Jan.  5  23  1.16    0 13.5   6.153   5.768    62   13.7  18:32 ( 53, 41)  

* 60P/Tsuchinshan 2

Now it is 13.7 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 14 mag in excellent condition until March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 15.74    0 16.7   1.044   1.632   107   13.9   4:47 (  0, 55)  
Jan.  5  11 25.32   -1 15.5   1.002   1.641   111   13.9   4:29 (  0, 54)  

* C/2017 M4 ( ATLAS )

Now it is 14.0 mag (Nov. 14, Kunihiro Shima). It stays 13-14 mag until summer in 2019. It is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  17  7.97   -9 53.6   4.133   3.257    23   14.2   5:36 (286,  6)  
Jan.  5  17 12.30  -11  6.1   4.085   3.254    28   14.2   5:38 (291, 10)  

* C/2018 V1 ( Machholz-Fujikawa-Iwamoto )

New bright comet discovered by three amateur comet hunters. It brightened rapidly from 10 mag up to 8 mag just after the discovery. But after that, the brightness evolution became slow, and it faded down to 9.5 mag in December (Dec. 9, Alan Hale). In the Northern Hemisphere, it will never be observable again after this. In the Southern Hemisphere, it will appear in the morning sky in February. But it may be fainter than 18 mag at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  19 32.86  -21  1.8   1.665   0.756    14   14.3  18:27 ( 68, -5)  
Jan.  5  19 41.97  -23 13.1   1.848   0.893     9   15.4  18:32 ( 69,-11)  

* 123P/West-Hartley

Now it is 14.8 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13-14 mag in winter, and it will be observable in excellent condition. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 22.41   27 43.4   1.540   2.148   114   14.4   4:54 (  0, 83)  
Jan.  5  11 29.20   28  5.2   1.473   2.141   119   14.3   4:33 (  0, 83)  

* 21P/Giacobini-Zinner

It brightened up to 6.8 mag in September (Sept. 17, Seiichi Yoshida). Now it is fading rapidly. It has already faded down to 13.8 mag (Dec. 15, R. Ramlow). It is observable in excellent condition in the Southern Hemisphere. It locates low after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   6 27.88  -37 52.8   1.060   1.760   118   14.4   0:00 (  0, 17)  
Jan.  5   6 19.68  -36 15.6   1.120   1.825   120   14.8  23:20 (  0, 19)  

* C/2015 O1 ( PanSTARRS )

Now it is 14.4 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this. It is observable in excellent condition until spring in the Northern Hemispehre. In the Southern Hemisphere, it will be hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 38.80   39 12.1   4.133   4.623   114   14.4   5:10 (180, 86)  
Jan.  5  11 30.94   40  9.1   4.071   4.658   121   14.4   4:35 (180, 85)  

* (944) Hidalgo

Now it is 14.3 mag (Nov. 30, Seiichi Yoshida). It stays at 14 mag until winter. It is observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  13 22.60   78 34.4   1.488   2.048   110   14.4   5:36 (185, 46)  
Jan.  5  13 30.39   79 13.2   1.504   2.070   110   14.5   5:38 (184, 46)  

* C/2017 B3 ( LINEAR )

Now it is 14.5 mag (Aug. 16, P. Camilleri, H. Williams). It stays 15 mag from 2018 to 2019, and it will be observable for a long time in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  19 37.96  -65 48.7   4.582   3.933    43   15.0  18:27 ( 27,-27)  
Jan.  5  20  1.18  -64 52.6   4.586   3.929    43   15.0  18:32 ( 29,-28)  

* 240P/NEAT

It brightened very rapidly up to 13.8 mag in August in 2017 (Aug. 22, Kunihiro Shima). Although it was faint as 16-17 mag in November, it brightened up to 14.7 mag in December (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in excellent condition after this. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 23.03   33 50.7   2.145   2.725   116   15.1   4:55 (  0, 89)  
Jan.  5  11 25.48   35  0.8   2.106   2.754   121   15.2   4:29 (  0, 90)  

* C/2018 A6 ( Gibbs )

Now it is bright as 15.1 mag (Nov. 21, Artyom Novichonok). It stays 14 mag for a long time in 2019. In the Southern Hemisphere, it is observable in excellent condition. In the Northern Hemisphere, it is observable in low sky until early January, but it will be unobservable after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 28.56  -39 58.1   3.399   3.476    86   15.2   5:00 (  0, 15)  
Jan.  5  11 25.58  -42 36.9   3.290   3.447    90   15.1   4:30 (  0, 12)  

* C/2018 A3 ( ATLAS )

Now it is 15.2 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It stays 15 mag until March. It is observable in excellent condition in the Northern Hemisphere. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  10 27.73   68 43.3   2.644   3.280   122   15.3   4:01 (180, 56)  
Jan.  5   9 51.94   72 18.2   2.613   3.278   125   15.2   2:58 (180, 53)  

* C/2017 T2 ( PanSTARRS )

Now it is 15.0 mag (Dec. 5, Sandor Szabo). It is expected to brighten up to 7-8 mag in 2020. In 2018, it will be observable at 15-16 mag in good condition from autum to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   3  8.11   -4 27.3   5.083   5.685   123   15.6  20:37 (  0, 51)  
Jan.  5   3  5.04   -3 55.6   5.115   5.624   116   15.5  20:06 (  0, 51)  

* 243P/NEAT

Although it was faint as 18 mag until Dec. 10, it suddenly brightened in outburst up to 15.4 mag on Dec. 12 (Dec. 12, A. Heinze). It stays observable in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   1 46.93    4 28.8   2.087   2.585   109   15.9  19:16 (  0, 60)  
Jan.  5   1 51.19    5 23.6   2.186   2.600   103   16.1  18:53 (  0, 61)  

* 48P/Johnson

Now it is 14.6 mag (Dec. 5, Sandor Szabo). It will be fading after this. It stays observable in excellent condition for a while 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. 29  23 57.36  -13 34.9   2.278   2.273    77   16.3  18:27 ( 19, 40)  
Jan.  5   0  8.01  -11 59.3   2.379   2.298    73   16.5  18:32 ( 26, 39)  

* C/2018 N1 ( NEOWISE )

It approached to Earth down to 0.3 a.u., and brightened up to 8.3 mag in July (July 22, Juan Jose Gonzalez). Now it is fading. It has faded down to 13.2 mag in September (Sept. 24, Thomas Lehmann). Appearing in the morning sky in the Northern Hemisphere. It will appear in the morning sky in January also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  15 28.78   -1 49.5   2.985   2.453    48   16.3   5:36 (297, 30)  
Jan.  5  15 28.32   -0 54.2   2.941   2.527    56   16.4   5:38 (302, 36)  

* 59P/Kearns-Kwee

Now it is 17.4 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It was predicted to be observable at 16.5 mag in good condition from autumn to winter. But recently, it is a bit fainter than predicted actually. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   8 30.65   23 58.9   1.573   2.487   152   16.4   2:03 (  0, 79)  
Jan.  5   8 25.93   23 48.7   1.556   2.504   160   16.4   1:31 (  0, 79)  

* 171P/Spahr

Now it is 16.7 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16.5 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   4 23.69    5 48.2   0.881   1.778   144   16.5  21:52 (  0, 61)  
Jan.  5   4 21.21    8 47.7   0.909   1.774   139   16.5  21:22 (  0, 64)  

* C/2016 A1 ( PanSTARRS )

It brightened up to 14.7 mag in early 2018 (Jan. 25, Catalina Sky Survey). Now it is fading slowly. Now it is 16.4 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition for a long time until the comet fades out. It is never observable again in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   6 37.33   72 32.4   5.404   6.091   130   16.6   0:12 (180, 53)  
Jan.  5   6 13.88   72 58.1   5.446   6.116   129   16.7  23:14 (180, 52)  

* C/2010 U3 ( Boattini )

Now it is 16.1 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). It stays 16-17 mag for a long time until 2020. It is observable in good condition in the Northern Hemisphere. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 57.49   71 17.2   7.996   8.453   114   16.6   5:29 (180, 54)  
Jan.  5  11 58.88   71 47.8   7.969   8.451   116   16.6   5:03 (180, 53)  

* 164P/Christensen

Now it is 17.3 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 19.43   22 41.1   1.964   2.532   114   17.0   4:51 (  0, 78)  
Jan.  5  11 21.06   23 38.0   1.926   2.572   120   17.0   4:25 (  0, 79)  

* 247P/LINEAR

Now it is 17.9 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter in the Northern Hemisphere. It locates very low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  10 59.93   34 18.3   0.758   1.519   120   17.2   4:31 (  0, 89)  
Jan.  5  11 10.98   35  6.8   0.745   1.536   124   17.2   4:15 (  0, 90)  

* C/2014 B1 ( Schwartz )

Now it is 17.2 mag (Dec. 12, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. It stays observable at 17 mag in good condition until summer in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 42.95    5 56.2   9.642   9.913   103   17.2   5:14 (  0, 61)  
Jan.  5  11 43.49    6  5.4   9.540   9.923   110   17.2   4:47 (  0, 61)  

* C/2015 V2 ( Johnson )

It brightened up to 7 mag from May to June in 2017. Now it is fading. It has already faded down to 15.9 mag (Dec. 8, Thomas Lehmann). In the Southern Hemisphere, it stays observable for a long time after this. It will never be observable again in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   0 51.13  -46 29.9   6.442   6.290    76   17.2  18:27 (  1,  9)  
Jan.  5   0 52.51  -45 27.2   6.573   6.349    72   17.3  18:32 (  7,  9)  

* 361P/2017 S4 ( Spacewatch )

Now it is 16.0 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). It was observed at 18 mag in last winter. It will be observable in good condition at 16-17 mag also in this winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   7 13.55    2  9.7   2.103   3.030   156   17.2   0:46 (  0, 57)  
Jan.  5   7  8.85    2 10.3   2.108   3.048   159   17.3   0:14 (  0, 57)  

* C/2018 W2 ( Africano )

It is expected to brighten up to 10 mag in autumn in 2019. Now it is 17.4 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while the comet is brightening. In the Southern Hemisphere, it it not observable until mid September in 2019.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  13 36.27   53  1.6   3.203   3.496    99   17.5   5:36 (215, 66)  
Jan.  5  13 44.88   55 45.0   3.073   3.427   102   17.3   5:38 (205, 66)  

* P/2014 C1 ( TOTAS )

First return of a new periodic comet discovered in 2014. It has not been recovered yet. Now it is not detected, fainter than 20.0 mag (Dec. 10, Toshihiko Ikemura, Hirohisa Sato). The condition of this apparition is excelllent. It will brighten rapidly, and will be observable at 15.5 mag in excellent condition in March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  11 16.94    2 42.6   1.367   1.914   107   17.5   4:48 (  0, 58)  
Jan.  5  11 26.17    1 49.3   1.277   1.887   112   17.3   4:30 (  0, 57)  

* 369P/2018 P1 ( Hill )

First return of a new periodic comet which brightened up to 17.5 mag in 2010. Now it is 17.0 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and will be fainter than 18 mag in late January. 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. 29   5 51.99   37 14.8   1.109   2.072   163   17.4  23:20 (180, 88)  
Jan.  5   5 47.40   37 32.1   1.147   2.093   158   17.5  22:48 (180, 87)  

* C/2015 XY1 ( Lemmon )

Now it is 17.2 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It was observed at 17 mag in last winter. It will be observable in good condition at 17.5 mag also in this winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   4 46.93    4 41.8   7.208   8.066   148   17.4  22:15 (  0, 60)  
Jan.  5   4 41.98    4 28.2   7.279   8.074   141   17.5  21:43 (  0, 59)  

* 239P/LINEAR

Now it is 17.8 mag (Dec. 14, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17.5 mag in excellent condition in January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   8 15.01    5 25.8   0.732   1.655   149   17.5   1:47 (  0, 60)  
Jan.  5   8 14.55    3 24.2   0.710   1.650   153   17.4   1:19 (  0, 58)  

* C/2018 E1 ( ATLAS )

Now it is 18.7 mag (Dec. 14, Toshihiko Ikemura, Hirohisa Sato). It brightened up to 16 mag in 2018 spring. It stays observable in good condition until 2019 spring when the comet will be fainter than 18 mag. It is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29  10 56.94   10  5.5   3.170   3.699   115   17.5   4:29 (  0, 65)  
Jan.  5  10 55.87   11 43.6   3.113   3.743   123   17.5   4:00 (  0, 67)  

* 159P/LONEOS

Now it is 17.2 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17.5 mag until January, in good condition in the Northern Hemisphere. It locates very low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   6  8.22   43 24.8   2.887   3.823   159   17.6  23:37 (180, 82)  
Jan.  5   6  2.39   43 43.0   2.917   3.835   155   17.6  23:03 (180, 81)  

* 232P/Hill

It was expected to be observable at 17.5 mag in good condition in winter in the Northern Hemisphere. But actually, it is so faint as 21.0 mag (Oct. 5, K. Sarneczky, et. al). It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   5 24.58   34 27.1   2.088   3.038   161   17.7  22:53 (  0, 89)  
Jan.  5   5 19.18   34 41.1   2.112   3.030   154   17.7  22:20 (  0, 90)  

* 373P/2018 R2 ( Rinner )

Now it is 17.7 mag (Dec. 8, Toshihiko Ikemura, Hirohisa Sato). First return of a new periodic comet which brightened up to 16 mag in 2011. It is observable at 17.5 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   2 36.97   12 16.9   1.731   2.420   123   17.7  20:06 (  0, 67)  
Jan.  5   2 39.49   11 54.0   1.794   2.406   117   17.7  19:41 (  0, 67)  

* 31P/Schwassmann-Wachmann 2

Now it is 18.8 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It is observable at 18 mag in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   6 53.54   21 25.2   2.530   3.510   174   17.9   0:26 (  0, 76)  
Jan.  5   6 48.42   21 38.7   2.521   3.504   176   17.9  23:49 (  0, 77)  

* C/2016 X1 ( Lemmon )

Now it is 18.1 mag (Dec. 14, Toshihiko Ikemura, Hirohisa Sato). It is observable at 18 mag in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Dec. 29   7 23.49    4 21.6   6.686   7.602   157   17.9   0:56 (  0, 59)  
Jan.  5   7 21.21    4 11.3   6.662   7.597   160   17.9   0:26 (  0, 59)  

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