Weekly Information about Bright Comets (2018 Oct. 20: North)

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Updated on October 24, 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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* 21P/Giacobini-Zinner

It brightened up to 6.8 mag in September (Sept. 17, Seiichi Yoshida). Now it is fading. It has already faded down to 10.0 mag (Oct. 16, Juan Jose Gonzalez). It is observable in excellent condition in the Southern Hemisphere. It will be getting lower gradually in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   7 19.00  -19 53.4   0.577   1.159    90    8.6   4:45 (348, 34)  
Oct. 27   7 23.72  -25  0.5   0.626   1.208    93    9.0   4:51 (357, 30)  

* 46P/Wirtanen

Now it is bright as 9.6 mag (Oct. 16, Juan Jose Gonzalez). It will approach to Earth down to 0.08 a.u. in December, and it is expected to brighten up to 3 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is observable in good condition until mid December when it brightens up to 3 mag. But it becomes unobservable after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   1 58.36  -31 19.6   0.345   1.274   138    9.3   0:06 (  0, 24)  
Oct. 27   1 59.15  -32 32.3   0.303   1.226   134    8.6  23:36 (  0, 22)  

* 38P/Stephan-Oterma

Now it is bright as 10.3 mag (Oct. 16, Maik Meyer). It will brighten up to 9 mag until winter. In the Northern Hemisphere, it stays observable in good condition for a long time until it fades out. In the Southern Hemispehre, it is observable in good condition until autumn, but it will be low in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   6 42.25   15 41.0   1.025   1.613   105    9.7   4:45 (357, 71)  
Oct. 27   6 58.83   17 19.9   0.970   1.600   109    9.5   4:38 (  0, 72)  

* 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 10.3 mag (Oct. 12, Marco Goiato). It stays bright as 9-10 mag for a while. 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)  
Oct. 20  14 38.94  -65 27.7   2.757   2.356    56   10.3  18:43 ( 29,-31)  
Oct. 27  14 45.44  -67  3.1   2.813   2.384    54   10.4  18:36 ( 27,-33)  

* 64P/Swift-Gehrels

Now it is very bright as 10.4 mag (Oct. 15, Maik Meyer). 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)  
Oct. 20   0 36.62   35 49.4   0.449   1.405   150   10.7  22:42 (180, 89)  
Oct. 27   0 42.39   36 35.8   0.445   1.396   149   10.6  22:20 (180, 88)  

* C/2018 L2 ( ATLAS )

Now it is very bright as 10.8 mag (Oct. 12, Paul Camilleri). It stays at 10-11 mag until winter. It will be unobservable soon in the Southern Hemisphere. In the Northern Hemisphere, it stays observable for a long time until it fades out. But it stays extremely low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  15 56.37   -0 34.8   2.515   1.804    35   11.4  18:43 ( 78, 16)  
Oct. 27  16 10.13    0 48.6   2.512   1.777    34   11.2  18:36 ( 80, 15)  

* C/2016 R2 ( PanSTARRS )

Now it is 10.7 mag (Oct. 16, Juan Jose Gonzalez). It will be fading slowly after this. In the Northern Hemisphere, it stays low until October. But it will be observable in good condition after that. 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)  
Oct. 20  13 10.31   44 52.8   3.570   3.114    55   12.2   4:45 (228, 19)  
Oct. 27  13 26.39   44  3.9   3.577   3.154    57   12.3   4:51 (230, 21)  

* C/2016 N6 ( PanSTARRS )

Now it is 12.2 mag (Oct. 6, Paul Camilleri). It stays 12 mag for a long time until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   8 59.42    6 10.2   3.005   2.844    71   12.2   4:45 (303, 46)  
Oct. 27   8 57.04    3 56.1   2.906   2.870    78   12.2   4:51 (316, 50)  

* 26P/Grigg-Skjellerup

It brightens up to 13 mag in October. But it is not observable at all.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  14 35.77  -10 31.0   2.046   1.109    14   13.0  18:43 ( 81, -6)  
Oct. 27  15  4.91  -11 12.4   2.063   1.132    14   13.1  18:36 ( 80, -5)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 11.6 mag (Oct. 13, Maik Meyer).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  22 46.77   -0 38.7   5.011   5.770   136   13.2  20:52 (  0, 54)  
Oct. 27  22 45.53   -0 48.5   5.093   5.770   128   13.2  20:23 (  0, 54)  

* 78P/Gehrels 2

Now it is 13.5 mag (Oct. 11, Paul Camilleri). 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)  
Oct. 20  21 23.22   -8 52.3   1.818   2.401   113   13.7  19:29 (  0, 46)  
Oct. 27  21 27.04   -9  1.7   1.872   2.373   107   13.6  19:05 (  0, 46)  

* C/2017 T3 ( ATLAS )

It brightened up to 8.7 mag in July (July 18, Marco Goiato). Then it faded down to 12.3 mag in August (Aug. 29, Chris Wyatt). Now it is not observable. It will appear in the morning sky in late December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  14 17.19  -26 38.0   2.705   1.793    18   13.7  18:43 ( 70,-19)  
Oct. 27  14 31.40  -26  0.9   2.829   1.886    14   14.0  18:36 ( 71,-20)  

* 48P/Johnson

Now it is bright as 12.8 mag (Oct. 12, Paul Camilleri). 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)  
Oct. 20  22 35.02  -27  5.9   1.368   2.077   122   13.8  20:40 (  0, 28)  
Oct. 27  22 39.84  -26 10.0   1.443   2.091   117   14.0  20:18 (  0, 29)  

* C/2018 N2 ( ASASSN )

Now it is 13.7 mag (Oct. 11, Paul Camilleri). 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)  
Oct. 20   2 16.74  -47  6.7   4.164   4.768   122   13.9   0:25 (  0,  8)  
Oct. 27   2  6.57  -46 46.2   4.138   4.722   120   13.8  23:42 (  0,  8)  

* C/2017 S3 ( PanSTARRS )

It brightened rapidly in outburst up to 6.9 mag (July 19, Maik Meyer). Then it faded down to 9.3 mag (Aug. 2, Katsumi Yoshimoto). It approached to Sun down to 0.2 a.u. in August, and it was expected to brighten up to 3 mag. However, it must have been already disintegrated. In the Northern Hemisphere, it is appearing in the morning sky. But it will be too faint to observe.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  12 44.93   18 46.4   2.356   1.597    31   13.9   4:45 (254,  9)  
Oct. 27  12 55.81   20  2.6   2.411   1.720    36   14.3   4:51 (255, 14)  

* C/2017 M4 ( ATLAS )

Now it is 14.0 mag (Oct. 7, Seiichi Yoshida). It stays 13-14 mag until summer in 2019. It will be unobservable soon in the Southern Hemisphere, or in November in the Northeren Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  16 26.12    5  7.5   3.998   3.363    44   14.3  18:43 ( 78, 25)  
Oct. 27  16 29.35    3 15.7   4.055   3.347    39   14.3  18:36 ( 79, 20)  

* C/2015 O1 ( PanSTARRS )

Now it is 14.3 mag (Aug. 17, Ken-ichi Kadota). It will be observable at 13-14 mag for a long time from 2017 to 2018. In the Southern Hemisphere, it will be hardly observable after this. In the Northern Hemispehre, it became low temporarily in September, but it will become high after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  11 59.54   34 39.3   4.863   4.298    50   14.4   4:45 (245, 26)  
Oct. 27  12  0.52   34 35.7   4.812   4.328    55   14.4   4:51 (248, 32)  

* (944) Hidalgo

Now it is 14.1 mag (Oct. 7, 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)  
Oct. 20   7 34.22   66 46.0   1.516   1.949    99   14.5   4:45 (190, 57)  
Oct. 27   8  8.71   69 21.4   1.490   1.947   101   14.4   4:51 (189, 55)  

* 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. But it is still bright as 13.2 mag (Sept. 24, Thomas Lehmann). Now it is not observable. It will appear in the morning sky again in December in the Northern Hemisphere, or in January in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  15 11.72   -6 23.6   2.609   1.743    23   14.5  18:43 ( 80,  3)  
Oct. 27  15 13.83   -6  7.9   2.724   1.808    18   14.7  18:36 ( 83,  0)  

* 300P/Catalina

Now it is 18.4 mag (Sept. 17, iTelescope Observatory, Siding Spring). It locates low. But it brightens up to 14.5 mag from October to November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  16 20.71  -22 50.6   1.308   0.857    40   15.0  18:43 ( 56,  6)  
Oct. 27  16 55.63  -24 41.3   1.244   0.838    42   14.7  18:36 ( 53,  7)  

* 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)  
Oct. 20  15 19.38  -67 53.2   4.429   4.027    60   15.0  18:43 ( 25,-28)  
Oct. 27  15 43.03  -68 14.0   4.452   4.013    57   15.0  18:36 ( 24,-28)  

* 123P/West-Hartley

Now it is 16.9 mag (Oct. 1, Ken-ichi Kadota). 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)  
Oct. 20   9 25.29   29  1.2   2.385   2.288    72   15.9   4:45 (268, 54)  
Oct. 27   9 39.46   28 40.5   2.293   2.268    76   15.7   4:51 (271, 58)  

* C/2018 A3 ( ATLAS )

Now it is 15.8 mag (Oct. 6, Ken-ichi Kadota). It will brighten up to 15 mag in winter. 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)  
Oct. 20  11 11.32   40 59.2   3.738   3.373    61   16.1   4:45 (242, 37)  
Oct. 27  11 14.25   42 26.4   3.612   3.358    67   16.1   4:51 (242, 43)  

* C/2017 T2 ( PanSTARRS )

Now it is 16.7 mag (Oct. 11, Thomas Lehmann). 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)  
Oct. 20   3 51.16   -5 40.0   5.454   6.280   143   16.2   1:59 (  0, 49)  
Oct. 27   3 47.45   -5 50.2   5.353   6.221   148   16.1   1:28 (  0, 49)  

* C/2015 V2 ( Johnson )

It brightened up to 7.1 mag from May to June in 2017 (June 21, Juan Jose Gonzalez). Now it is fading. It has already faded down to 16.6 mag (Sept. 3, Slooh.com Chile Observatory, La Dehesa). 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)  
Oct. 20   1 18.26  -54 33.8   5.201   5.696   115   16.4  23:22 (  0,  1)  
Oct. 27   1 12.15  -54 11.4   5.305   5.756   112   16.5  22:48 (  0,  1)  

* 65P/Gunn

Now it is 16.2 mag (Sept. 16, Mt. Lemmon Survey). It is observable in good 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)  
Oct. 20  22 47.57  -19 43.8   2.681   3.393   128   16.5  20:52 (  0, 35)  
Oct. 27  22 46.88  -19 21.3   2.777   3.408   121   16.6  20:24 (  0, 36)  

* 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 16.5 mag (Sept. 16, Kunihiro Shima). 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)  
Oct. 20   8 24.90   59 12.2   5.729   5.862    92   16.5   4:45 (208, 60)  
Oct. 27   8 23.71   60 38.3   5.653   5.884    98   16.5   4:51 (199, 62)  

* 60P/Tsuchinshan 2

Now it is 16.0 mag (Oct. 6, Ken-ichi Kadota). It will brighten very rapidly after this. It will brighten up to 14.5 mag from January to February, and it is expected to be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   8 45.31   17 34.8   1.617   1.702    77   16.8   4:45 (293, 57)  
Oct. 27   9  3.21   16  4.6   1.547   1.683    79   16.5   4:51 (300, 59)  

* (3552) Don Quixote

Now it is 16.2 mag (June 17, Jean-Francois Soulier). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition after this until it fades out. It is not observable in the Southern Hemisphere. Its cometary activity was observed on Mar. 26 (M. Mommert, D. Polishook, N. Moskovitz).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   1 54.42   54 36.6   1.475   2.293   135   16.6   0:04 (180, 70)  
Oct. 27   1 39.29   54 32.6   1.518   2.351   137   16.6  23:15 (180, 70)  

* 37P/Forbes

It brightened up to 12 mag from spring to summer. Now it is fading. It has already faded down to 17.1 mag (Oct. 8, Toshihiko Ikemura, Hirohisa Sato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  22 54.95    4 55.6   1.393   2.245   139   16.7  21:00 (  0, 60)  
Oct. 27  22 55.79    4 47.7   1.490   2.285   132   17.0  20:33 (  0, 60)  

* 171P/Spahr

Now it is 19.7 mag (Sept. 18, R. Fichtl). It will brighten rapidly. It is expected to be observable at 15.5 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   4 59.29   -7 38.8   1.165   1.933   126   17.0   3:07 (  0, 47)  
Oct. 27   5  1.05   -7 46.4   1.100   1.910   131   16.7   2:41 (  0, 47)  

* 59P/Kearns-Kwee

Now it is 17.1 mag (Sept. 16, Ken-ichi Kadota). It is observable at 16.5 mag in good condition from autumn to winter. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   8  1.22   27 25.2   2.162   2.373    89   16.8   4:45 (287, 71)  
Oct. 27   8 10.17   26 56.0   2.087   2.379    94   16.7   4:51 (298, 75)  

* C/2010 U3 ( Boattini )

Now it is 16.9 mag (Sept. 12, D. Buczynski). 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)  
Oct. 20  10 57.10   67 36.8   8.546   8.480    82   16.8   4:45 (208, 42)  
Oct. 27  11  5.83   67 47.4   8.479   8.477    86   16.8   4:51 (207, 44)  

* 369P/2018 P1 ( Hill )

First return of a new periodic comet which brightened up to 17.5 mag in 2010. Now it is 18.1 mag (Sept. 9, Mt. Lemmon Survey). It is expected to brighten up to 16.5 mag from November to December. 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)  
Oct. 20   5 58.20   27 33.9   1.297   1.958   116   17.0   4:06 (  0, 83)  
Oct. 27   6  4.95   28 35.9   1.243   1.960   122   16.9   3:45 (  0, 84)  

* A/2017 U7

Asteroid, but it brightened rapidly. Now it is 16.8 mag (Aug. 16, Slooh.com Chile Observatory, La Dehesa).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  22 39.94  -46  1.4   6.362   6.785   111   17.0  20:44 (  0,  9)  
Oct. 27  22 33.15  -45 42.8   6.447   6.770   104   17.0  20:10 (  0,  9)  

* 368P/2018 L3 ( NEAT )

First return of a new periodic comet which brightened up to 16.5 mag in 2005. Now it is 17.3 mag (Sept. 15, A. Martin, K. Kleemann-Boeker). It will be observable at 17 mag in good condition in autumn. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   1 54.72   33 50.7   1.146   2.095   155   17.0   0:03 (  0, 89)  
Oct. 27   1 52.39   32 38.0   1.146   2.107   159   17.0  23:29 (  0, 88)  

* C/2015 V1 ( PanSTARRS )

Now it is 16.4 mag (Sept. 18, ATLAS-MLO, Mauna Loa). Fading now. It stays observable in good condition for a long time after this in the Southern Hemisphere. It stays low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  23  5.52  -39  6.6   4.388   4.954   119   17.1  21:10 (  0, 16)  
Oct. 27  22 57.89  -39 30.7   4.520   4.982   112   17.2  20:35 (  0, 16)  

* 164P/Christensen

Now it is 18.0 mag (Sept. 10, iTelescope Observatory, Mayhill). 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)  
Oct. 20   9 58.10   20 36.0   2.417   2.140    62   17.2   4:45 (275, 44)  
Oct. 27  10 10.42   20 20.7   2.379   2.177    66   17.1   4:51 (278, 48)  

* 137P/Shoemaker-Levy 2

Now it is 16.6 mag (Oct. 7, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. It will be fainter than 18 mag in December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  21 33.37   -7 40.4   1.339   1.996   116   17.3  19:39 (  0, 47)  
Oct. 27  21 40.23   -7 34.0   1.388   1.980   111   17.4  19:18 (  0, 48)  

* C/2014 OE4 ( PanSTARRS )

Now it is 16.8 mag (Sept. 14, A. Diepvens). It will be fading gradually after this, and it will be fainter than 18 mag in winter. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  22 38.08   74 52.4   7.333   7.740   110   17.4  20:42 (180, 50)  
Oct. 27  22 36.87   74  3.7   7.339   7.767   112   17.4  20:14 (180, 51)  

* C/2015 XY1 ( Lemmon )

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)  
Oct. 20   5 37.27    8 38.9   7.441   7.998   120   17.4   3:45 (  0, 64)  
Oct. 27   5 33.43    8 11.0   7.348   8.004   128   17.4   3:14 (  0, 63)  

* 240P/NEAT

It brightened very rapidly up to 13.8 mag in last August (Aug. 22, 2017, Kunihiro Shima). Now it is 16.8 mag (Aug. 18, Slooh.com Canary Islands Observatory). In the Northern Hemisphere, it stays observable in excellent condition after this. It will be observable also in the Southern Hemisphere in December, but it stays low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   9 57.57   28 45.1   2.684   2.450    65   17.4   4:45 (264, 48)  
Oct. 27  10  9.77   28 48.1   2.631   2.476    70   17.5   4:51 (267, 52)  

* 371P/2018 R1 ( LINEAR-Skiff )

Return of a new periodic comet which brightened up to 17 mag in 2001. It was missed at the last return in 2010. Now it is 19.1 mag (Sept. 8, E. Schwab, D. Abreu). It was predicted to brighten up to 17.5 mag from September to November. But actually, it is a bit fainter than predicted.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   1 46.95  -12 49.6   1.243   2.195   156   17.5  23:51 (  0, 42)  
Oct. 27   1 41.15  -12  2.7   1.258   2.198   154   17.6  23:18 (  0, 43)  

* 361P/2017 S4 ( Spacewatch )

Now it is 17.6 mag (Sept. 13, iTelescope Observatory, Mayhill). It was observed at 18 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)  
Oct. 20   7 17.35    7 59.2   2.592   2.878    96   17.7   4:45 (339, 61)  
Oct. 27   7 21.69    7  9.1   2.517   2.890   101   17.6   4:51 (354, 62)  

* P/2018 P3 ( PanSTARRS )

It brightened very rapidly. Now it is 17.3 mag (Sept. 16, Mt. Lemmon Survey). It will be fading after October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20  23 53.16  -15 51.7   0.856   1.759   143   17.7  21:58 (  0, 39)  
Oct. 27  23 52.81  -14 26.2   0.896   1.763   137   17.8  21:30 (  0, 41)  

* C/2017 K4 ( ATLAS )

Now it is 17.7 mag (Oct. 1, Ken-ichi Kadota). It was observed at 16 mag from summer to autumn in 2017. It will be observable at 17 mag in good condition also in 2018. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   0 42.92   28 54.3   2.879   3.817   157   17.7  22:47 (  0, 84)  
Oct. 27   0 39.43   28 21.1   2.941   3.863   154   17.8  22:16 (  0, 83)  

* C/2011 KP36 ( Spacewatch )

Now it is 17.8 mag (Aug. 23, iTelescope Observatory, Siding Spring). It stays 17 mag in 2018.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Oct. 20   5 12.92    2 37.3   7.119   7.747   126   17.8   3:21 (  0, 58)  
Oct. 27   5 11.74    2 20.6   7.075   7.781   132   17.8   2:52 (  0, 57)  

* (3200) Phaethon

Although it is around the aphelion, it is observable at 17.5 mag in November, 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)  
Oct. 20   3 56.59   41 17.6   1.581   2.402   136   18.1   2:05 (180, 84)  
Oct. 27   3 41.27   41  8.5   1.520   2.399   144   17.9   1:23 (180, 84)  

* 159P/LONEOS

Now it is 18.5 mag (Sept. 12, D. Buczynski). 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)  
Oct. 20   6 36.04   36  3.0   3.284   3.720   108   18.0   4:44 (180, 89)  
Oct. 27   6 37.83   36 51.3   3.202   3.729   114   17.9   4:18 (180, 88)  

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