Weekly Information about Bright Comets (2021 Nov. 6: North)

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Updated on November 15, 2021
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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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* 67P/Churyumov-Gerasimenko

Now it is bright as 9.3 mag (Nov. 6, Katsumi Yoshimoto). It stays 9 mag until January, and it is observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   7 36.57   26 32.5   0.419   1.212   111    9.2   4:36 (  0, 81)  
Nov. 13   8  0.82   26 44.2   0.418   1.218   113    9.0   4:32 (  0, 82)  

* C/2021 A1 ( Leonard )

Now it is 11.0 mag (Oct. 29, Michael Jager). It will approach to Earth down to 0.2 a.u. in December, and it is expected to brighten up to 4 mag. In the Northern Hemisphere, it stays observable in good condition for a long time until December while the comet is brightening gradually. In the Southern Hemisphere, it is not observable until mid December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  11 58.24   34 29.3   1.401   1.314    63   10.4   4:59 (253, 42)  
Nov. 13  12 10.29   33 54.7   1.163   1.205    67    9.6   5:05 (255, 46)  

* 6P/d'Arrest

Now it is bright as 10.1 mag (Nov. 7, Chris Wyatt). It is observable at 10 mag in good condition from October to December. In the Northern Hemisphere, it locates somewhat low at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21  3.30  -31 30.5   1.158   1.467    85    9.8  18:27 (  6, 23)  
Nov. 13  21 29.15  -30 48.4   1.226   1.498    84    9.9  18:23 (  5, 24)  

* C/2019 L3 ( ATLAS )

Now it is 9.7 mag (Nov. 5, Marek Biely). It stays bright as 10 mag until spring for a long time. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   7 47.14   40  3.3   3.127   3.603   110   10.3   4:47 (180, 85)  
Nov. 13   7 46.82   39 24.4   3.026   3.593   117   10.2   4:19 (180, 86)  

* 8P/Tuttle

It brightened very rapidly, and brightened up to 8.9 mag (Sept. 11, Chris Wyatt). Now it is fading. But it is bright as 11 mag still now (Nov. 1, Giuseppe Pappa). In the Southern Hemisphere, it stays observable after this while the comet will be fading. But it stays locating low. It is not observable after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  12 48.09  -42  6.5   2.134   1.456    36   10.5   4:59 (314,-11)  
Nov. 13  13 14.21  -44 38.4   2.204   1.525    36   10.9   5:05 (317,-12)  

* 4P/Faye

Now it is bright as 10.9 mag (Oct. 17, Osamu Miyazaki). It stays observable at 10-11 mag in excellent condition from summer to autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   6 52.58   10 49.1   1.003   1.724   119   10.5   3:52 (  0, 66)  
Nov. 13   6 56.28    9 49.0   0.980   1.749   125   10.6   3:28 (  0, 65)  

* 19P/Borrelly

Now it is 11.6 mag (Nov. 2, Chris Wyatt). It will brighten rapidly up to 9 mag in winter. It will be observable in good condition. In the Southern Hemisphere, it is observable in excellent condition. It will be getting higher rapidly after this also in the Northren Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  23  4.98  -50  7.1   1.190   1.656    98   11.4  20:02 (  0,  5)  
Nov. 13  23  8.36  -47  9.4   1.185   1.610    95   11.0  19:38 (  0,  8)  

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.4 mag (Oct. 29, Osamu Miyazaki). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it is not observable at the high light from 2022 autumn to 2023 summer. In the Southern Hemisphere, it is not observable until February. But it will be observable in good condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  17 16.09   19 51.9   5.443   4.891    51   11.6  18:27 ( 92, 33)  
Nov. 13  17 20.52   18 46.8   5.431   4.829    48   11.5  18:23 ( 94, 28)  

* 57P/du Toit-Neujmin-Delporte

Major outburst occured on Oct. 17. Now it is very bright as 11.5 mag (Oct. 22, Marco Goiato). It stays observable in the evening sky for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  19  1.69  -20 38.7   1.978   1.730    60   12.0  18:27 ( 38, 24)  
Nov. 13  19 21.57  -20 12.9   2.034   1.738    58   12.1  18:23 ( 39, 24)  

* C/2020 T2 ( Palomar )

It brightened up to 9.5 mag in early summer (June 27, Marco Goiato). Now it is fading. It has already faded down to 13.4 mag (Oct. 25, Chris Wyatt). It will be unobservable soon in the Northern Hemisphere, or in November in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  17 35.85  -30 21.4   3.128   2.478    41   12.3  18:27 ( 47,  5)  
Nov. 13  17 51.62  -31  8.4   3.224   2.523    38   12.5  18:23 ( 48,  3)  

* C/2019 T4 ( ATLAS )

Now it is 13.8 mag (Oct. 9, Chris Wyatt). It is expected to brighten up to 11.5 mag in 2022. In the Southern Hemisphere, it stas observable in good condition for a long time, although it became extremely low temporarily from August to September. It is getting observable also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  11 19.69  -26 22.8   5.197   4.601    48   13.0   4:59 (315, 12)  
Nov. 13  11 26.23  -26 51.2   5.112   4.579    52   12.9   5:05 (321, 16)  

* 29P/Schwassmann-Wachmann 1

Major outburst occured on Sept. 25, and it brightened up to 10.0 mag (Oct. 1, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. But it is bright as 11.2 mag still now (Nov. 5, Osamu Miyazaki).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   4 49.99   32 16.3   5.071   5.928   147   13.3   1:50 (  0, 87)  
Nov. 13   4 46.81   32 14.5   5.023   5.930   154   13.3   1:20 (  0, 87)  

* C/2021 O1 ( Nishimura )

It was observed at 9-10 mag from late July to early August. Now it is not observable. It will appear in the morning sky in December, but it will be fainter than 15 mag at that time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  14 17.91  -10  5.1   2.651   1.677     8   13.4   4:59 (276, -9)  
Nov. 13  14 32.35  -12  6.1   2.733   1.773    11   13.7   5:05 (280, -7)  

* 22P/Kopff

Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky at 11 mag in late January, then it stays observable at 11 mag until June. In the Northern Hemisphere, it will appear in the morning sky in December, but it stays locating extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  14 24.36  -10 57.9   2.997   2.017     6   14.1   4:59 (276,-11)  
Nov. 13  14 40.49  -12 17.4   2.946   1.977     9   13.9   5:05 (279, -9)  

* C/2020 J1 ( SONEAR )

It brightened up to 12.3 mag from spring to summer (June 15, Marco Goiato). Now it is fading. It has already faded down to 13.8 mag (Sept. 8, Chris Wyatt). Now it is not observable. It will be observable again at 14 mag in November 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)  
Nov.  6  14 11.04   -1 15.1   4.779   3.840    16   13.9   4:59 (269, -3)  
Nov. 13  14 14.17   -0 49.2   4.769   3.872    22   14.0   5:05 (273,  3)  

* 132P/Helin-Roman-Alu 2

Now it is 13.7 mag (Oct. 25, Chris Wyatt). It stays 14 mag unil December, and it is observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   0 26.85   -3 42.0   0.805   1.693   140   14.0  21:24 (  0, 51)  
Nov. 13   0 31.51   -3 34.5   0.841   1.692   134   14.0  21:01 (  0, 52)  

* 9P/Tempel 1

It will brighten up to 12 mag from winter to spring. In the Northern Hemisphere, it is appearing in the morning sky. In the Southern Hemisphere, it is not observable until January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  13 13.92   -0 41.4   2.742   1.912    26   14.4   4:59 (277,  9)  
Nov. 13  13 30.16   -2 27.9   2.674   1.876    29   14.2   5:05 (281, 11)  

* 104P/Kowal 2

Now it is 17.1 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). It will brightens rapidly. And it is expected to be observable at 12-13 mag in good condition from December to February. However, it is much fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 50.23   -9 59.2   0.767   1.381   102   14.7  18:48 (  0, 45)  
Nov. 13  21 58.59  -10 15.0   0.765   1.329    97   14.4  18:29 (  0, 45)  

* C/2020 Y2 ( ATLAS )

Now it is 16.0 mag (Aug. 16, iTelescope Observatory, Siding Spring). It is expected to brighten up to 13 mag in 2022. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became extremely low temporarily from September to October. In the Northern Hemisphere, it becomes observable temporarily in the extremely low sky in December. But it becomes unobservable again soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  12 38.55  -36 12.1   4.565   3.790    34   15.1   4:59 (310, -6)  
Nov. 13  12 41.54  -37 52.9   4.477   3.754    38   15.0   5:05 (316, -3)  

* 108P/Ciffreo

Now it is 15.7 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It stays 15 mag until November. It will be observable in excellent condition 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)  
Nov.  6   7 14.09   30 38.8   1.062   1.753   117   15.2   4:14 (  0, 86)  
Nov. 13   7 20.38   31 54.9   1.033   1.776   122   15.3   3:53 (  0, 87)  

* C/2020 F5 ( MASTER )

Now it is 14.5 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Southern Hemisphere, it stays observable in good condition for a long time. It locates low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  22 23.60  -24 20.8   4.359   4.711   104   15.2  19:21 (  0, 31)  
Nov. 13  22 23.46  -23 12.6   4.487   4.733    98   15.3  18:53 (  0, 32)  

* C/2020 PV6 ( PanSTARRS )

Now it is 14.2 mag (Oct. 21, Giuseppe Pappa). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes extremely low temporarily in November. In the Southern Hemisphere, it is not observable until late January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  16  6.94   17 14.3   3.027   2.340    38   15.3  18:27 ( 99, 17)  
Nov. 13  16  7.79   17  0.5   3.063   2.356    37   15.4  18:23 (102, 13)  

* C/2018 U1 ( Lemmon )

Now it is 15.9 mag (Oct. 8, Thomas Lehmann). It stays at 14-15 mag for a long time from 2021 to 2022. It is not observable from November to January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  16 33.52  -22 37.6   5.859   4.993    26   15.3  18:27 ( 62, -1)  
Nov. 13  16 36.78  -23 26.3   5.909   4.994    20   15.3  18:23 ( 65, -5)  

* C/2020 R7 ( ATLAS )

Now it is 15.9 mag (Oct. 24, Taras Prystavski). It will brighten up to 12.5 mag in 2022 summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable until August in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   0 16.18  -76  8.0   4.198   4.233    85   15.4  21:10 (  0,-21)  
Nov. 13  23 43.21  -75 18.7   4.220   4.188    81   15.3  20:11 (  0,-20)  

* 117P/Helin-Roman-Alu 1

Now it is 15.8 mag (Oct. 4, Thomas Lehmann). Now it is not observable. It will appear in the morning sky at 15 mag in January. Then it will brighten up to 13 mag in 2022 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  15 15.53  -17 25.8   4.243   3.263     7   15.4  18:27 ( 77,-13)  
Nov. 13  15 25.92  -18 14.1   4.239   3.251     3   15.4  18:23 ( 78,-16)  

* 246P/NEAT

Now it is 15.3 mag (Oct. 25, Chris Wyatt). It will be fading slowly after this. It will be unobservable in December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  19 42.73  -33  7.6   3.388   3.166    68   15.4  18:27 ( 23, 18)  
Nov. 13  19 52.29  -32 40.1   3.490   3.181    63   15.5  18:23 ( 26, 17)  

* 110P/Hartley 3

It brightened rapidly. Now it is 15.6 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15 mag in excellent condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   8 27.25   20 52.4   2.093   2.458    99   15.5   4:59 (335, 75)  
Nov. 13   8 32.67   20  6.4   2.011   2.461   105   15.4   5:05 (  0, 75)  

* C/2019 F1 ( ATLAS-Africano )

Now it is 15 mag (Oct. 31, Giuseppe Pappa). It was expected to brighten up to 13 mag from spring to summer. But actually, it is fainter than originally expected. It will be fading slowly after this. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until July in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 49.18  -70 40.1   3.841   3.801    80   15.4  18:48 (  0,-15)  
Nov. 13  21 59.70  -68 40.4   3.910   3.821    77   15.5  18:31 (  0,-13)  

* 10P/Tempel 2

It brightened up to 10.1 mag in spring (Apr. 10, Marco Goiato). Now it is fading. It has already faded down to 16.0 mag (Nov. 2, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a long time after this while the comet will fading.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   4 36.87    5 31.8   1.611   2.521   150   15.5   1:37 (  0, 61)  
Nov. 13   4 29.53    5 21.7   1.622   2.563   157   15.6   1:03 (  0, 60)  

* C/2019 U5 ( PanSTARRS )

Now it is 15.3 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes low temporarily in November. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  16 14.02   33  8.7   6.222   5.689    53   15.6  18:27 (113, 26)  
Nov. 13  16 16.56   32 31.8   6.190   5.646    52   15.6  18:23 (115, 22)  

* C/2020 V2 ( ZTF )

Now it is 15.7 mag (Oct. 25, D. Buczynski). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn, although it became extremely low temporarily in September. In the Southern Hemipshere, it stays unobservable until 2023 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  12 47.17   34 33.1   6.412   5.940    57   15.8   4:59 (248, 32)  
Nov. 13  12 50.67   34 58.5   6.274   5.885    62   15.7   5:05 (250, 38)  

* C/2021 E3 ( ZTF )

Now it is 15.2 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag from spring to summer in 2022. In the Southen Hemisphere, it locates somewhat low in 2021, but it will be observable in good condition at the high light for a long time. In the Northern Hemisphere, it is observable in good condition in 2021, but it will not be observable at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  18 39.41    4 53.8   3.521   3.175    61   15.8  18:27 ( 62, 40)  
Nov. 13  18 42.28    3  2.4   3.559   3.112    55   15.7  18:23 ( 65, 36)  

* P/2021 Q5 ( ATLAS )

Now it is 14.7 mag (Oct. 14, Sandor Szabo). It stays observable in good condition for a long time. It will be fading rapidly after this, and it will be fainter than 18 mag in January.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  10 12.51    1 45.7   1.491   1.471    69   15.7   4:59 (310, 45)  
Nov. 13  10 25.74   -0 21.0   1.483   1.515    72   16.0   5:05 (317, 46)  

* C/2020 M5 ( ATLAS )

Now it is 15.9 mag (Sept. 24, D. Buczynski). In the Northern Hemisphere, it stays observable at 15-16 mag for a long time until early 2022, although it became extremely low temporarily from September to October. In the Southern Hemisphere, it is not observable until December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  13 11.16   21 49.3   3.737   3.102    44   15.7   4:59 (258, 22)  
Nov. 13  13 13.88   20 34.3   3.691   3.120    48   15.7   5:05 (263, 27)  

* 284P/McNaught

It brightened up to 14.5 mag in autumn (Oct. 1, Ken-ichi Kadota). Now it is fading. It has already faded down to 16.2 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It will be fading rapidly after this. It will be fainter than 18 mag in February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  23  9.25  -16 52.5   1.693   2.326   117   16.0  20:07 (  0, 38)  
Nov. 13  23 13.78  -16 24.8   1.776   2.335   111   16.1  19:44 (  0, 39)  

* C/2021 D2 ( ZTF )

Now it is 17.6 mag (Nov. 5, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 15.5 mag in winter. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable at all in the Southern Hemisphere. It is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  15 46.79   62 12.5   3.111   3.080    79   16.1  18:27 (147, 32)  
Nov. 13  15 51.03   62 14.1   3.065   3.061    80   16.0  18:23 (147, 30)  

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.6 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in winter, and it will be observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   6 41.26    0 43.2   3.358   3.944   119   16.1   3:41 (  0, 56)  
Nov. 13   6 40.56    0 42.8   3.277   3.942   126   16.0   3:13 (  0, 56)  

* C/2021 K1 ( ATLAS )

Now it is 15.4 mag (Oct. 20, Ken-ichi Kadota). It continues brightening even after the perihelion passage. It may stay 15-16 mag for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   0 54.75  -14 48.7   2.241   3.059   139   16.1  21:51 (  0, 40)  
Nov. 13   0 53.92  -14 36.2   2.337   3.097   132   16.3  21:23 (  0, 41)  

* C/2021 A7 ( NEOWISE )

It brightened up to 14.2 mag in early summer (June 10, Thomas Lehmann). Now it is fading. In the Northern Hemisphere, it is appearing in the morning sky. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  13 26.22   29 24.0   2.927   2.397    49   16.1   4:59 (249, 23)  
Nov. 13  13 42.78   30 38.0   2.907   2.444    53   16.2   5:05 (250, 26)  

* 193P/LINEAR-NEAT

Now it is 16.4 mag (Oct. 22, ATLAS-MLO, Mauna Loa). It stays observable in good condition for a long time. But it will be fading after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  22 58.37    2 52.5   1.531   2.232   122   16.1  19:56 (  0, 58)  
Nov. 13  23  2.15    3 23.8   1.613   2.244   117   16.3  19:32 (  0, 59)  

* C/2020 K1 ( PanSTARRS )

Now it is 16.2 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it is observable in good condition in 2021. But it is observable only until November in 2022. In the Southern Hemisphere, it is not observable until February. But it will be observable in good condition at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  17 40.75   24 45.6   6.304   5.859    59   16.2  18:27 ( 95, 40)  
Nov. 13  17 44.56   23 44.1   6.309   5.810    55   16.2  18:23 ( 96, 36)  

* C/2020 U5 ( PanSTARRS )

Now it is 16.9 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2023.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   9 34.99   65 46.4   3.772   4.053    99   16.5   4:59 (198, 56)  
Nov. 13   9 44.29   68 15.5   3.681   4.031   103   16.4   5:05 (192, 55)  

* 7P/Pons-Winnecke

It brightened up to 9.7 mag in June (June 4, Michael Jager). Now it is fading. It has already faded down to 16.3 mag (Oct. 12, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it becomes extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  23 22.88  -37 10.0   1.651   2.184   108   16.4  20:20 (  0, 18)  
Nov. 13  23 27.41  -35  4.5   1.769   2.238   104   16.8  19:57 (  0, 20)  

* 116P/Wild 4

Now it is 17.0 mag (Nov. 1, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly, and it will be observable at 13.5 mag in good condition from winter to spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   9 31.58   18 32.7   2.680   2.763    84   16.7   4:59 (303, 64)  
Nov. 13   9 39.14   18  3.6   2.563   2.738    89   16.5   5:05 (315, 68)  

* 106P/Schuster

It brightened up to 15.2 mag in summer (Aug. 25, Ken-ichi Kadota). Now it is fading. It has already faded down to 17.0 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in December. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   8 44.08   36 16.1   1.279   1.741    99   16.5   4:59 (259, 81)  
Nov. 13   8 56.06   37 38.3   1.255   1.775   103   16.7   5:05 (240, 85)  

* 15P/Finlay

It brightened very rapidly up to 10.7 mag in July (July 20, Osamu Miyazaki). Now it is fading. It has already faded down to 17.3 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It stays observable in the morning sky for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   8 58.58   25 54.3   1.458   1.816    93   16.6   4:59 (302, 74)  
Nov. 13   9  2.66   26  6.8   1.440   1.882    99   16.7   5:05 (322, 79)  

* 70P/Kojima

Now it is 17.3 mag (Oct. 2, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15.5 mag, and will be observable in excellent condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  10 10.53   11 38.1   2.060   2.009    73   16.7   4:59 (300, 52)  
Nov. 13  10 23.84   10 45.4   1.992   2.011    76   16.6   5:05 (307, 55)  

* C/2019 T3 ( ATLAS )

Now it is 16.3 mag (Oct. 26, ATLAS-MLO, Mauna Loa). It is observable at 16 mag from 2020 to 2021. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 31.57   27 15.0   5.826   6.197   107   16.6  18:29 (  0, 82)  
Nov. 13  21 30.92   25 49.3   5.934   6.211   101   16.7  18:23 ( 29, 80)  

* 52P/Harrington-Abell

Now it is 16.9 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag from autumn to winter. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it stays extremely low until November.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  10 59.34   10 26.4   2.050   1.802    61   16.7   4:59 (290, 42)  
Nov. 13  11 13.69    8 30.3   2.005   1.815    64   16.7   5:05 (296, 45)  

* C/2019 T2 ( Lemmon )

It was expected to brighten up to 14.5 mag from spring to summer. But actually, it is fainter than expected. Now it is 16.4 mag (Oct. 4, ATLAS-MLO, Mauna Loa). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  11 52.48  -51 52.2   3.902   3.343    49   16.7   4:59 (328,-11)  
Nov. 13  11 56.23  -52  8.2   3.916   3.386    51   16.8   5:05 (331, -8)  

* C/2021 O3 ( PanSTARRS )

Now it is 16.9 mag (Oct. 22, J.-G. Bosch, F. Kugel). It is expected to brighten up to 4.5 mag in 2022 April. However, it is not observable at the high light. In the Northern Hemisphere, it stays observable until early February when it brightens up to 14 mag. Then it will appear at 6 mag in mid May, and it stays observable in good condition after that while the comet will be fading. In the Southern Hemisphere, it stays observable until December when it brightens up to 16 mag. But after that, it is not observable until 2022 August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 57.44   13 31.5   2.565   3.063   110   16.9  18:54 (  0, 69)  
Nov. 13  21 55.60   11 48.0   2.575   2.970   103   16.8  18:25 (  0, 67)  

* C/2020 F7 ( Lemmon )

Now it is 17.0 mag (Oct. 18, ATLAS-HKO, Haleakala). It brightened rapidly. It stays 17 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it will be observable only in extremely low sky from autumn to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   9  8.23  -31 37.0   5.472   5.332    76   16.9   4:59 (344, 21)  
Nov. 13   9  6.66  -33 18.0   5.389   5.332    81   16.8   5:05 (352, 21)  

* C/2019 N1 ( ATLAS )

It brightened up to 11.6 mag in winter (Feb. 18, Thomas Lehmann). Now it is fading. It has already faded down to 17.6 mag (Oct. 18, J. Drummond). In the Southern Hemisphere, it stays observable in good condition after this. In the Northern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   2 21.87  -69 13.8   4.091   4.289    94   16.8  23:16 (  0,-14)  
Nov. 13   2  2.08  -68  6.6   4.187   4.353    93   16.9  22:29 (  0,-13)  

* C/2019 O3 ( Palomar )

Now it is 16.3 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It stays at 16-17 mag from 2020 to 2021. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  18 23.79   47 25.2   9.049   8.931    80   16.9  18:27 (124, 53)  
Nov. 13  18 25.98   47 13.2   9.087   8.938    78   16.9  18:23 (124, 50)  

* 254P/McNaught

Now it is 16.3 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It continues brightening even after the perihelion passage. It stays observable at 17 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   5  4.07  -16  4.1   3.021   3.767   132   16.9   2:04 (  0, 39)  
Nov. 13   5  0.14  -16 21.4   3.003   3.785   136   16.9   1:33 (  0, 39)  

* 422P/2021 L1 ( Christensen )

First return of a new periodic comet which brightened up to 17 mag in 2006. Now it is 17.4 mag (Sept. 27, N. Paul, E. Cortes). It stays 17 mag from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a while. It locates extremely low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 46.10  -54 10.0   3.053   3.142    85   16.9  18:44 (  0,  1)  
Nov. 13  21 52.70  -52  8.0   3.116   3.135    81   16.9  18:23 (  0,  3)  

* C/2020 U4 ( PanSTARRS )

Now it is 17.4 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It stays 17-18 mag for a long time from 2021 to 2022. It is observable in excellent condition 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)  
Nov.  6   4 40.92   34 31.5   4.608   5.473   147   17.1   1:42 (  0, 90)  
Nov. 13   4 29.85   34 28.0   4.543   5.462   156   17.0   1:03 (  0, 90)  

* P/2021 N2 ( Fuls )

Now it is 15.5 mag (Nov. 2, Toshihiko Ikemura, Hirohisa Sato). It is observable at 16-17 mag in good condition in autumn. It is brighter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   2 13.46   14 39.1   2.812   3.798   172   17.0  23:10 (  0, 70)  
Nov. 13   2 10.29   14  0.5   2.834   3.797   164   17.1  22:39 (  0, 69)  

* 28P/Neujmin 1

Now it is 17.0 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition after this while the comet will be fading. In the Southern Hemisphere, it stays locating extremely low for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   5 14.18   42 40.5   2.220   3.032   138   17.1   2:15 (180, 82)  
Nov. 13   5  7.35   42 56.8   2.224   3.088   145   17.1   1:41 (180, 82)  

* C/2021 P4 ( ATLAS )

Now it is 17.3 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2022 summer. In the Northern Hemisphere, it stays observable in good condition until 2022 June when it brightens up to 11 mag. But it is not observable after the high light. In the Souther Hemisphere, it is not observable until 2022 October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  22 54.73   61 11.7   3.177   3.763   119   17.3  19:51 (180, 64)  
Nov. 13  22 45.65   60  8.5   3.133   3.689   116   17.1  19:15 (180, 65)  

* 430P/2021 Q2 ( Scotti )

First return of a new periodic comet which brightened up to 17 mag in 2011. Now it is 16.8 mag (Oct. 10, Ken-ichi Kadota). It stays observable at 17 mag in good condition until 2022 spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  11 11.91    9 12.2   1.853   1.575    58   17.3   4:59 (289, 39)  
Nov. 13  11 31.29    7 17.7   1.804   1.566    60   17.2   5:05 (294, 41)  

* (3200) Phaethon

Now it is 18.7 mag (Oct. 14, Catalina Sky Survey). In the Northern Hemisphere, it stays observable at 17 mag in good condition from November to December. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   3 55.93   40  3.4   1.364   2.284   151   17.5   0:57 (180, 85)  
Nov. 13   3 36.48   39 20.9   1.311   2.259   157   17.3   0:11 (180, 86)  

* C/2018 N2 ( ASASSN )

Now it is 16.5 mag (Sept. 3, Thomas Lehmann). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. In the Southern Hemisphere, it will never be observable again.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  14 23.79   41 28.7   7.559   7.077    57   17.3   4:59 (232, 18)  
Nov. 13  14 27.91   41 10.0   7.569   7.125    59   17.3   5:05 (235, 23)  

* 2010 OE101

Michael Jager detected its cometary activity on Sept. 25. It approached to Earth down to 0.35 a.u. in early October, and it brightened up to 16.2 mag (Oct. 3, Michael Jager). Now it is fading rapidly. It has already faded down to 18.0 mag (Oct. 27, Katsumi Yoshimoto).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   1  2.51  -12 54.9   0.475   1.396   141   17.3  22:00 (  0, 42)  
Nov. 13   1 15.15  -14 33.3   0.525   1.417   136   17.6  21:45 (  0, 40)  

* 230P/LINEAR

Now it is 18.7 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16.5-17 mag in winter. In its last apparition in 2015, it brightened up to 13 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  21 56.33  -30 46.2   1.661   2.030    96   17.4  18:54 (  0, 24)  
Nov. 13  22  3.37  -29 47.5   1.699   1.991    91   17.3  18:34 (  0, 25)  

* 241P/LINEAR

Now it is 17.5 mag (Nov. 5, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable at 17 mag in good condition until winter. In the Southern Hemisphere, it stays locating extremely low for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   9  4.96   26 44.2   1.869   2.155    92   17.4   4:59 (296, 74)  
Nov. 13   9 11.15   25 39.2   1.817   2.185    97   17.4   5:05 (316, 77)  

* 17P/Holmes

Outburst occured in early August, and it brightened up to 14.1 mag (Aug. 7, Michael Jager). Now it is fading. It has already faded down to 17.5 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemipsphere, it stays locating extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   5 56.30   48 31.5   2.067   2.801   129   17.4   2:57 (180, 76)  
Nov. 13   5 51.52   48 57.3   2.039   2.830   135   17.7   2:25 (180, 76)  

* C/2020 S4 ( PanSTARRS )

Now it is 17.2 mag (Nov. 2, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 14 mag in early 2023. It stays observable in good condition for a long time until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   4 49.76    2 39.8   4.459   5.313   146   17.5   1:50 (  0, 58)  
Nov. 13   4 47.15    2 31.4   4.373   5.269   152   17.4   1:20 (  0, 58)  

* 119P/Parker-Hartley

Now it is 17.4 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15 mag in 2022 winter. In 2021, it stays observable in good condition while the comet will be brightening gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  22 24.39  -18 29.2   2.513   2.965   107   17.5  19:22 (  0, 37)  
Nov. 13  22 26.93  -18  2.3   2.582   2.939   101   17.5  18:57 (  0, 37)  

* C/2019 K7 ( Smith )

Now it is 17.4 mag (Oct. 29, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable after this in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  16 25.94   47 42.6   6.314   6.006    67   17.5  18:27 (128, 34)  
Nov. 13  16 29.36   47 37.1   6.346   6.041    67   17.6  18:23 (129, 31)  

* 274P/Tombaugh-Tenagra

Now it is 21.4 mag (Aug. 19, Pan-STARRS 1, Haleakala). It was expected to be observable at 17 mag from November to March. But actually, it is much fainter than expected. It is observable in good condition in the Northern Hemisphere, but it locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   6  6.85   21 11.0   1.922   2.687   131   17.7   3:07 (  0, 76)  
Nov. 13   6  6.31   21 48.8   1.840   2.668   139   17.6   2:39 (  0, 77)  

* 81P/Wild 2

It will brighten up to 11.5 mag in 2022 winter. Now it is 18.8 mag (Oct. 16, Purple Mountain Observatory, XuYi Station). It stays observable while the comet will be brightening slowly.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   3 40.84   15  3.1   2.576   3.547   166   18.0   0:41 (  0, 70)  
Nov. 13   3 34.95   14 40.8   2.528   3.513   173   17.9   0:08 (  0, 70)  

* P/2021 U3 ( Attard-Maury )

Now it is 18.3 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17-18 mag in good condition from November to December.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6   6 11.22   -6 54.1   1.150   1.892   123   18.1   3:11 (  0, 48)  
Nov. 13   5 57.87   -3 26.9   1.070   1.896   133   17.9   2:31 (  0, 51)  

* 395P/2020 H1 ( Catalina-NEAT )

Now it is 17.4 mag (Oct. 2, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17-18 mag for a long time from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  19 35.71  -18 30.9   4.320   4.075    69   17.9  18:27 ( 31, 30)  
Nov. 13  19 42.19  -18 19.0   4.413   4.073    63   18.0  18:23 ( 36, 28)  

* 424P/2021 L5 ( La Sagra )

First return of a new periodic comet which brightened up to 17 mag in 2012. Now it is 18.4 mag (Oct. 26, Catalina Sky Survey). 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)  
Nov.  6  21 51.85  -23 41.8   0.803   1.364    98   17.9  18:50 (  0, 32)  
Nov. 13  22 13.26  -20 22.4   0.831   1.371    97   18.0  18:44 (  0, 35)  

* 433P/(248370) 2005 QN173

Now it is 18.1 mag (Oct. 3, Michael Jager). Main-belt asteroid, but it has a long tail of 10 arcmin. It stays observable in good condition until winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov.  6  23 34.07   -2 49.8   1.794   2.541   129   20.2  20:31 (  0, 52)  
Nov. 13  23 35.25   -2 42.3   1.879   2.554   122   20.4  20:05 (  0, 52)  

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