Weekly Information about Bright Comets (2021 Nov. 20: North)

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Updated on November 21, 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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* C/2021 A1 ( Leonard )

Now it is bright as 8.6 mag (Nov. 15, 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. 20  12 26.99   33  9.4   0.917   1.097    70    8.7   5:11 (258, 49)  
Nov. 27  12 54.57   31 43.9   0.665   0.991    70    7.6   5:16 (261, 50)  

* 67P/Churyumov-Gerasimenko

Now it is bright as 8.9 mag (Nov. 15, Marco Goiato). 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. 20   8 21.30   26 50.6   0.420   1.231   116    8.9   4:25 (  0, 82)  
Nov. 27   8 37.73   26 56.8   0.423   1.250   119    8.9   4:14 (  0, 82)  

* 6P/d'Arrest

Now it is bright as 10.1 mag (Nov. 7, Marco Goiato). 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. 20  21 53.82  -29 45.3   1.299   1.533    83   10.0  18:20 (  5, 25)  
Nov. 27  22 17.19  -28 25.1   1.376   1.570    81   10.2  18:18 (  6, 27)  

* C/2019 L3 ( ATLAS )

Now it is 9.9 mag (Nov. 15, Marco Goiato). 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. 20   7 45.23   38 42.7   2.931   3.584   124   10.2   3:50 (180, 86)  
Nov. 27   7 42.33   37 58.0   2.844   3.577   131   10.1   3:20 (180, 87)  

* 19P/Borrelly

Now it is 11.6 mag (Nov. 2, Marco Goiato). 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. 20  23 13.93  -43 51.8   1.181   1.566    91   10.7  19:16 (  0, 11)  
Nov. 27  23 21.36  -40 15.3   1.178   1.524    89   10.4  18:56 (  0, 15)  

* 4P/Faye

Now it is bright as 10.6 mag (Nov. 10, 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. 20   6 57.83    8 55.4   0.961   1.776   131   10.7   3:03 (  0, 64)  
Nov. 27   6 57.30    8 10.4   0.948   1.805   137   10.8   2:35 (  0, 63)  

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.1 mag (Nov. 11, 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 becomes extremely low temporarily in December, but it will be getting higher again after January. However, 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. 20  17 25.25   17 46.1   5.411   4.768    45   11.4  18:20 ( 96, 24)  
Nov. 27  17 30.23   16 49.9   5.385   4.706    42   11.4  18:18 ( 98, 19)  

* 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 10.4 mag still now (Nov. 13, Chris Wyatt). 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. 20  13 40.00  -46 45.5   2.274   1.595    36   11.4   5:11 (319,-12)  
Nov. 27  14  5.28  -48 30.3   2.343   1.666    37   11.9   5:16 (322,-12)  

* 57P/du Toit-Neujmin-Delporte

Major outburst occured on Oct. 17. Now it is very bright as 11.8 mag (Nov. 7, 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. 20  19 41.43  -19 37.6   2.092   1.748    56   12.3  18:20 ( 40, 24)  
Nov. 27  20  1.17  -18 53.3   2.151   1.761    53   12.5  18:18 ( 42, 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 is not observable already in the Northern Hemisphere. It will be unobservable soon also in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20  18  7.40  -31 47.5   3.317   2.570    34   12.7  18:20 ( 49,  1)  
Nov. 27  18 23.14  -32 18.9   3.408   2.618    31   12.9  18:18 ( 50, -1)  

* 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. 20  11 32.45  -27 19.0   5.020   4.558    57   12.9   5:11 (326, 19)  
Nov. 27  11 38.34  -27 46.0   4.922   4.537    61   12.8   5:16 (332, 21)  

* 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 11.0 mag still now (Nov. 13, Chris Wyatt).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20   4 43.29   32 10.4   4.988   5.932   161   13.3   0:49 (  0, 87)  
Nov. 27   4 39.53   32  3.7   4.968   5.934   167   13.3   0:18 (  0, 87)  

* 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. 20  14 57.24  -13 34.6   2.893   1.938    12   13.6   5:11 (283, -6)  
Nov. 27  15 14.61  -14 48.6   2.838   1.900    14   13.4   5:16 (286, -3)  

* 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. 20  22  9.50  -10 16.5   0.760   1.279    93   14.0  18:20 (  2, 45)  
Nov. 27  22 22.86  -10  3.8   0.753   1.233    89   13.7  18:18 (  7, 45)  

* 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. 20  13 46.79   -4 14.6   2.605   1.841    31   14.0   5:11 (285, 14)  
Nov. 27  14  3.93   -6  1.1   2.537   1.808    34   13.9   5:16 (289, 16)  

* 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. 20  14 45.99  -13 56.1   2.809   1.868    14   14.0   5:11 (284, -4)  
Nov. 27  14 58.91  -15 36.3   2.878   1.962    17   14.2   5:16 (289, -1)  

* 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). In the Northern Hemisphere, it is appearing in the morning sky. It is not observable until January in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20  14 17.16   -0 20.0   4.746   3.904    28   14.0   5:11 (278, 10)  
Nov. 27  14 19.95    0 13.1   4.710   3.936    34   14.0   5:16 (282, 16)  

* 132P/Helin-Roman-Alu 2

Now it is 13.3 mag (Nov. 3, Toshihiko Ikemura, Hirohisa Sato). 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. 20   0 37.64   -3 11.4   0.883   1.693   129   14.0  20:40 (  0, 52)  
Nov. 27   0 45.15   -2 34.2   0.932   1.697   124   14.1  20:20 (  0, 53)  

* 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. 20  12 44.21  -39 40.0   4.382   3.718    42   14.9   5:11 (321,  0)  
Nov. 27  12 46.50  -41 34.0   4.280   3.684    47   14.8   5:16 (327,  2)  

* 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. 20   8 36.87   19 21.7   1.931   2.464   110   15.3   4:41 (  0, 74)  
Nov. 27   8 39.75   18 38.8   1.856   2.468   117   15.3   4:17 (  0, 74)  

* 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. 20  23 16.83  -74  8.3   4.246   4.143    77   15.3  19:18 (  0,-19)  
Nov. 27  22 56.87  -72 44.1   4.272   4.099    73   15.3  18:31 (  0,-18)  

* 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. 20  15 36.48  -19  0.5   4.227   3.240     1   15.3   5:11 (282,-17)  
Nov. 27  15 47.20  -19 44.8   4.209   3.229     5   15.3   5:16 (285,-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. 20  16 40.24  -24 14.7   5.946   4.995    14   15.4  18:20 ( 67, -9)  
Nov. 27  16 43.85  -25  2.9   5.970   4.996     8   15.4  18:18 ( 69,-14)  

* 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. 20  22 24.03  -22  3.9   4.618   4.757    92   15.4  18:26 (  0, 33)  
Nov. 27  22 25.27  -20 55.0   4.750   4.780    85   15.5  18:18 (  5, 34)  

* 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. 20   7 24.42   33 15.3   1.008   1.801   128   15.4   3:29 (  0, 88)  
Nov. 27   7 26.06   34 38.4   0.990   1.827   135   15.5   3:03 (  0, 90)  

* 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. 20  16 19.26   32  0.5   6.150   5.603    52   15.5  18:20 (117, 18)  
Nov. 27  16 22.08   31 35.0   6.102   5.560    52   15.4  18:18 (119, 14)  

* 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. 20  16  8.86   16 55.5   3.085   2.374    37   15.5  18:20 (105,  8)  
Nov. 27  16 10.04   16 59.6   3.093   2.395    38   15.5   5:16 (252,  4)  

* C/2020 V2 ( ZTF )

Now it is 14.2 mag (Nov. 9, Toshihiko Ikemura, Hirohisa Sato). 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. 20  12 53.99   35 30.4   6.129   5.830    67   15.6   5:11 (252, 44)  
Nov. 27  12 57.09   36  9.3   5.980   5.774    73   15.5   5:16 (254, 50)  

* 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. 20  18 45.76    1 17.7   3.591   3.049    49   15.6  18:20 ( 68, 30)  
Nov. 27  18 49.80   -0 20.5   3.616   2.986    43   15.5  18:18 ( 70, 25)  

* 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. 20  20  2.19  -32 10.3   3.588   3.196    59   15.5  18:20 ( 29, 16)  
Nov. 27  20 12.36  -31 38.2   3.683   3.212    54   15.6  18:18 ( 32, 15)  

* 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. 20  22 10.13  -66 38.8   3.981   3.843    74   15.6  18:20 (  1,-11)  
Nov. 27  22 20.46  -64 36.0   4.054   3.866    72   15.6  18:18 (  2, -9)  

* 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. 20  13 16.18   19 25.0   3.637   3.139    52   15.8   5:11 (269, 33)  
Nov. 27  13 17.98   18 21.1   3.573   3.160    57   15.8   5:16 (274, 39)  

* P/2021 N2 ( Fuls )

Brightened rapidly. Now it is 15.5 mag (Nov. 2, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15.5-16 mag in good condition until winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20   2  7.49   13 23.9   2.869   3.797   156   15.8  22:09 (  0, 68)  
Nov. 27   2  5.24   12 50.5   2.918   3.798   148   15.8  21:39 (  0, 68)  

* 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. 20   4 21.75    5 17.8   1.646   2.605   162   15.8   0:27 (  0, 60)  
Nov. 27   4 13.93    5 20.9   1.684   2.647   164   15.9  23:47 (  0, 60)  

* 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. 20  15 55.81   62 31.1   3.015   3.043    82   15.9  18:20 (149, 28)  
Nov. 27  16  1.04   63  4.4   2.963   3.026    84   15.9   5:16 (211, 29)  

* 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. 20   6 39.05    0 47.1   3.204   3.940   132   16.0   2:44 (  0, 56)  
Nov. 27   6 36.78    0 56.8   3.140   3.939   139   15.9   2:14 (  0, 56)  

* 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. 20   9 46.05   17 37.3   2.447   2.714    94   16.3   5:11 (331, 70)  
Nov. 27   9 52.26   17 14.1   2.332   2.689   100   16.1   5:16 (350, 72)  

* 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. 20  17 48.64   22 47.0   6.308   5.762    52   16.1  18:20 ( 97, 31)  
Nov. 27  17 52.96   21 54.4   6.302   5.713    49   16.1  18:18 ( 99, 26)  

* 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. 20  10 37.44   -2 20.4   1.476   1.564    75   16.2   5:11 (326, 47)  
Nov. 27  10 47.95   -4 14.0   1.462   1.613    79   16.5   5:16 (334, 48)  

* 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. 20   9 53.82   70 52.9   3.600   4.009   107   16.3   5:11 (187, 54)  
Nov. 27  10  3.72   73 37.4   3.531   3.988   110   16.2   5:16 (183, 51)  

* 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. 20  23 19.30  -15 48.4   1.863   2.344   106   16.2  19:22 (  0, 39)  
Nov. 27  23 25.72  -15  4.4   1.953   2.354   101   16.4  19:01 (  0, 40)  

* 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. 20  13 59.53   31 56.6   2.889   2.493    57   16.3   5:11 (250, 30)  
Nov. 27  14 16.45   33 20.0   2.873   2.543    60   16.3   5:16 (250, 34)  

* 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. 20  23  7.11    3 59.6   1.699   2.258   111   16.4  19:09 (  0, 59)  
Nov. 27  23 13.11    4 39.7   1.790   2.272   106   16.5  18:48 (  0, 60)  

* 70P/Kojima

Now it is 16.9 mag (Nov. 9, 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. 20  10 36.58    9 55.1   1.924   2.014    80   16.5   5:11 (315, 58)  
Nov. 27  10 48.69    9  8.3   1.857   2.018    84   16.4   5:16 (325, 60)  

* 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. 20   0 53.91  -14 14.7   2.442   3.135   126   16.5  20:56 (  0, 41)  
Nov. 27   0 54.72  -13 45.5   2.555   3.173   120   16.7  20:29 (  0, 41)  

* 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 16-17 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20   4 55.67  -16 29.6   2.997   3.803   139   16.5   1:01 (  0, 39)  
Nov. 27   4 50.85  -16 27.8   3.002   3.821   141   16.5   0:28 (  0, 39)  

* 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. 20  21 55.00   10 10.7   2.589   2.875    96   16.7  18:20 ( 13, 65)  
Nov. 27  21 55.59    8 40.3   2.605   2.779    89   16.5  18:18 ( 25, 62)  

* 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. 20  11 27.35    6 35.1   1.959   1.829    67   16.7   5:11 (303, 47)  
Nov. 27  11 40.31    4 41.5   1.913   1.846    71   16.7   5:16 (311, 49)  

* 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. 20  21 30.89   24 28.8   6.048   6.225    95   16.8  18:20 ( 47, 75)  
Nov. 27  21 31.42   23 13.9   6.166   6.240    89   16.8  18:18 ( 58, 70)  

* 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. 20   9  4.25  -34 59.4   5.308   5.332    86   16.8   5:08 (  0, 20)  
Nov. 27   9  0.91  -36 40.1   5.231   5.333    90   16.8   4:38 (  0, 18)  

* 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. 20  11 59.01  -52 27.6   3.919   3.430    53   16.9   5:11 (335, -5)  
Nov. 27  12  0.76  -52 49.7   3.914   3.474    56   16.9   5:16 (340, -3)  

* 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. 20   9  4.70   26 27.2   1.421   1.947   106   16.9   5:09 (  0, 81)  
Nov. 27   9  4.63   26 55.5   1.403   2.012   113   17.0   4:42 (  0, 82)  

* 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. 20   9  6.20   39  6.3   1.233   1.812   108   16.9   5:11 (180, 86)  
Nov. 27   9 14.28   40 40.5   1.214   1.850   114   17.1   4:51 (180, 84)  

* 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. 20  22 38.71   58 58.6   3.095   3.612   114   17.0  18:40 (180, 66)  
Nov. 27  22 33.99   57 46.1   3.065   3.537   110   16.9  18:18 (177, 67)  

* 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. 20  18 28.52   47  4.8   9.122   8.944    76   16.9  18:20 (124, 46)  
Nov. 27  18 31.37   47  0.3   9.154   8.951    75   17.0  18:18 (125, 42)  

* 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. 20  21 59.99  -50  4.4   3.181   3.129    77   16.9  18:20 (  3,  5)  
Nov. 27  22  7.83  -47 59.9   3.247   3.123    74   17.0  18:18 (  6,  7)  

* 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. 20   4 59.63   43  3.6   2.240   3.143   151   17.0   1:05 (180, 82)  
Nov. 27   4 51.44   43  0.5   2.269   3.198   156   17.0   0:30 (180, 82)  

* 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. 20   1 45.70  -66 44.1   4.288   4.417    90   17.0  21:46 (  0,-12)  
Nov. 27   1 32.68  -65 10.2   4.394   4.480    88   17.1  21:06 (  0,-10)  

* 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. 20  11 50.42    5 21.7   1.756   1.559    61   17.2   5:11 (299, 42)  
Nov. 27  12  9.28    3 25.7   1.711   1.555    63   17.1   5:16 (304, 43)  

* 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. 20  23 32.72  -33  0.6   1.891   2.291   100   17.1  19:35 (  0, 22)  
Nov. 27  23 38.66  -30 58.9   2.016   2.344    96   17.4  19:13 (  0, 24)  

* (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. 20   3 15.93   38  8.8   1.275   2.232   160   17.2  23:16 (180, 87)  
Nov. 27   2 55.64   36 28.6   1.257   2.202   157   17.2  22:28 (180, 89)  

* 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. 20   4 18.28   34 17.7   4.499   5.452   163   17.2   0:24 (  0, 89)  
Nov. 27   4  6.45   34  0.2   4.477   5.443   167   17.2  23:39 (  0, 89)  

* 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. 20  22 11.78  -28 40.0   1.736   1.953    87   17.3  18:20 (  1, 26)  
Nov. 27  22 21.40  -27 24.4   1.772   1.916    82   17.3  18:18 (  5, 28)  

* 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. 20   4 44.15    2 25.9   4.301   5.224   156   17.3   0:49 (  0, 57)  
Nov. 27   4 40.86    2 23.6   4.242   5.180   159   17.3   0:19 (  0, 57)  

* 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. 20  14 31.88   40 56.5   7.573   7.173    62   17.3   5:11 (238, 28)  
Nov. 27  14 35.67   40 48.1   7.570   7.220    65   17.4   5:16 (240, 33)  

* 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. 20   6  4.43   22 30.7   1.768   2.649   146   17.5   2:10 (  0, 77)  
Nov. 27   6  1.25   23 16.2   1.706   2.631   154   17.4   1:39 (  0, 78)  

* 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. 20   9 15.76   24 36.8   1.766   2.217   103   17.4   5:11 (348, 79)  
Nov. 27   9 18.73   23 37.3   1.716   2.249   109   17.5   4:56 (  0, 79)  

* 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. 20  22 30.48  -17 29.5   2.653   2.914    95   17.5  18:33 (  0, 38)  
Nov. 27  22 34.97  -16 51.4   2.726   2.889    89   17.5  18:18 (  2, 38)  

* 81P/Wild 2

It will brighten up to 11.5 mag in 2022 winter. 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. 20   3 28.76   14 18.2   2.495   3.479   173   17.8  23:30 (  0, 69)  
Nov. 27   3 22.54   13 56.4   2.477   3.444   166   17.7  22:56 (  0, 69)  

* 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. 20   5 40.91    0 45.9   1.007   1.903   145   17.8   1:47 (  0, 56)  
Nov. 27   5 20.60    5 41.0   0.964   1.913   157   17.7   0:59 (  0, 60)  

* 99P/Kowal 1

It will be observable at 17 mag in good condition in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20  13  0.15   -4 59.4   5.428   4.737    41   17.9   5:11 (294, 22)  
Nov. 27  13  5.90   -5 36.8   5.347   4.735    47   17.8   5:16 (299, 27)  

* 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. 20   5 45.08   49 14.2   2.020   2.860   141   17.9   1:51 (180, 76)  
Nov. 27   5 37.29   49 20.2   2.012   2.890   146   18.2   1:16 (180, 76)  

* 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. 20   1 27.47  -15 22.3   0.580   1.442   131   17.9  21:30 (  0, 40)  
Nov. 27   1 39.52  -15 31.6   0.642   1.471   127   18.2  21:14 (  0, 40)  

* P/2020 V4 ( Rankin )

Now it is 18.0 mag (Nov. 4, Toshihiko Ikemura, Hirohisa Sato). It is observable at 18 mag in good condition in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Nov. 20   8  8.61    4  5.4   4.719   5.187   113   18.0   4:13 (  0, 59)  
Nov. 27   8  8.52    3 46.0   4.630   5.192   119   17.9   3:46 (  0, 59)  

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