Weekly Information about Bright Comets (2022 Mar. 5: North)

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Updated on March 5, 2022
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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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* 19P/Borrelly

Now it is bright as 10.1 mag (Mar. 3, Osamu Miyazaki). It stays bright as 9-10 mag until March. In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it stays extremely low after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   2 52.91   24 49.6   1.453   1.359    64    9.6  19:22 ( 91, 46)  
Mar. 12   3 14.82   28 29.0   1.508   1.383    63    9.9  19:28 ( 97, 45)  

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.0 mag (Feb. 26, 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 stays observable in good condition until autumn. However, it is not observable at the high light from autumn to 2023 summer. In the Southern Hemisphere, it stays observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 43.52   11 19.3   4.114   3.828    66    9.9   5:01 (290, 44)  
Mar. 12  18 47.10   11 22.0   3.965   3.764    71    9.7   4:51 (293, 47)  

* C/2019 L3 ( ATLAS )

Now it is 9.9 mag (Mar. 3, Osamu Miyazaki). In the Northern Hemisphere, it will be getting lower after this, and it will be unobservable in May. In the Southern Hemisphere, it stays observable until July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   6 34.40   20 42.6   3.070   3.589   113   10.3  19:43 (  0, 76)  
Mar. 12   6 35.26   19 34.1   3.177   3.598   107   10.4  19:28 ( 11, 74)  

* 22P/Kopff

Now it is 12.0 mag (Feb. 23, Thomas Lehmann). In the Northern Hemisphere, it stays extremely low until spring. In the Southern Hemisphere, it stays observable at 11 mag until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  20 12.73  -18 25.8   2.132   1.558    42   11.0   5:01 (299,  8)  
Mar. 12  20 34.92  -17 23.9   2.099   1.554    44   10.9   4:51 (298,  8)  

* 104P/Kowal 2

Brightened very rapidly. It is still bright as 10.9 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   5  4.62   13 25.1   0.767   1.277    92   11.1  19:22 ( 39, 64)  
Mar. 12   5 37.03   14 28.8   0.824   1.327    93   11.7  19:28 ( 41, 64)  

* C/2021 A1 ( Leonard )

It brightened up to 3 mag from mid December to late December. Now it is fading. It has already faded down to 11.0 mag (Feb. 23, Martin Masek). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it will become observable again at 13 mag in late April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  21 21.42  -34 52.3   2.009   1.351    36   11.3   5:01 (303,-14)  
Mar. 12  21 18.06  -34 51.4   2.013   1.459    43   11.7   4:51 (305,-10)  

* C/2019 T4 ( ATLAS )

Now it is bright as 12.0 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 11.5 mag in spring. It stas observable in good condition for a long time. In the Northern Hemisphere, it stays somewhat low until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  12  1.97  -26 28.8   3.474   4.317   144   11.6   1:13 (  0, 28)  
Mar. 12  11 59.34  -25 22.8   3.417   4.307   150   11.6   0:43 (  0, 29)  

* C/2021 O3 ( PanSTARRS )

It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). Now it is not observable. It is expected to brighten up to 4.5 mag in April. However, it is not observable at the high light. In the Northern Hemisphere, 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 is not observable until August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  23 48.78   -0 20.0   2.156   1.212    13   12.5  19:22 ( 93, -5)  
Mar. 12   0  5.48   -0 30.5   2.038   1.074    10   11.9  19:28 ( 96, -9)  

* 9P/Tempel 1

Now it is 14.7 mag (Feb. 3, Giuseppe Pappa). It stays 12-13 mag for a while. But actually, it is fainter than this ephemeris recently. It is observable in excellent condition in the Southern Hemisphere. It locates low until May in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 54.27  -22 45.1   1.746   1.544    61   12.1   5:01 (316, 18)  
Mar. 12  19 16.49  -22 54.2   1.707   1.546    63   12.1   4:51 (315, 17)  

* 67P/Churyumov-Gerasimenko

It brightened up to 8.5 mag from autumn to winter (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 11.7 mag (Mar. 3, Osamu Miyazaki). It stays observable in good condition for a long time. It locates somewhat low in the Southern Hemisphere,

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   8 24.57   26 19.5   1.022   1.878   137   12.3  21:33 (  0, 81)  
Mar. 12   8 27.77   25 35.7   1.124   1.933   131   12.7  21:08 (  0, 80)  

* C/2021 F1 ( Lemmon-PanSTARRS )

Now it is bright as 12.4 mag (Feb. 22, Seiichi Yoshida). It stays 12 mag until spring. In the Northern Hemisphere, it is observable only until early March. In the Southern Hemisphere, it is not observable until late May. But it will be observable in good condition after that. Sandor Szabo reported it is very bright as 10.2 mag on Mar. 1.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  23  1.44   42 14.7   1.524   1.142    48   12.5   5:01 (226, 12)  
Mar. 12  23 38.47   38 26.0   1.600   1.089    42   12.4  19:28 (130, 10)  

* C/2021 E3 ( ZTF )

Now it is 14.9 mag (Nov. 28, Thomas Lehmann). It is expected to brighten up to 11 mag from spring to summer. In the Southen Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it is hardly observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  20 18.71  -18 20.5   2.817   2.175    41   13.6   5:01 (298,  7)  
Mar. 12  20 26.30  -20  0.0   2.675   2.126    47   13.4   4:51 (301,  8)  

* C/2020 Y2 ( ATLAS )

Now it is 16.1 mag (Feb. 19, J. L. Virlichie, P. Traverse, H. Roy). It was expected to brighten up to 13 mag in spring. But actually, it is fainter than this ephemeris recently. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   9 11.31  -70 12.4   2.951   3.292   101   13.5  22:14 (  0,-15)  
Mar. 12   8 29.49  -69  5.4   2.928   3.272   101   13.5  21:06 (  0,-14)  

* 116P/Wild 4

Now it is 12.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable at 13 mag in good condition until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   9 33.76   19 23.2   1.449   2.385   154   13.7  22:41 (  0, 74)  
Mar. 12   9 29.53   19 28.2   1.470   2.367   147   13.7  22:09 (  0, 74)  

* 29P/Schwassmann-Wachmann 1

Now it is bright as 12.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable until April in the Southern Hemisphere, or until May in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   4 21.88   29 14.2   5.976   5.963    84   13.7  19:22 ( 84, 66)  
Mar. 12   4 24.84   29  9.4   6.089   5.966    78   13.7  19:28 ( 89, 59)  

* C/2020 V2 ( ZTF )

Now it is 13.4 mag (Feb. 28, 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. In the Southern Hemipshere, it stays unobservable until 2023 summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  12 23.27   56 44.4   4.327   4.987   127   14.2   1:35 (180, 68)  
Mar. 12  12 10.63   58 10.9   4.297   4.930   124   14.1   0:55 (180, 67)  

* 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 14.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  13 58.68   19  5.4   3.695   4.453   135   14.1   3:10 (  0, 74)  
Mar. 12  13 50.38   21  4.0   3.676   4.493   141   14.1   2:34 (  0, 76)  

* C/2019 U5 ( PanSTARRS )

Now it is 14.1 mag (Mar. 2, 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. In the Southern Hemisphere, it locates extremely low in 2022, but it will be observable in good condition in 2023.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  16 36.64   36 45.7   4.733   4.980    98   14.3   5:01 (256, 80)  
Mar. 12  16 32.51   37 48.8   4.621   4.940   102   14.2   4:51 (239, 84)  

* 117P/Helin-Roman-Alu 1

Now it is 15.3 mag (Feb. 23, Thomas Lehmann). It will brighten up to 13 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 15.58  -25 49.4   3.287   3.102    70   14.4   5:01 (325, 20)  
Mar. 12  18 24.32  -26  1.3   3.188   3.095    75   14.4   4:51 (327, 21)  

* C/2020 R7 ( ATLAS )

Now it is 15.7 mag (Feb. 2, Thomas Lehmann). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time, although it became low temporarily in February. In the Northern Hemisphere, it is not observable until August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  22 37.06  -55 17.2   4.092   3.526    49   14.5   5:01 (317,-34)  
Mar. 12  22 40.04  -54 45.9   4.011   3.490    52   14.4   4:51 (317,-32)  

* 4P/Faye

It brightened up to 10.6 mag in autumn (Oct. 10, Osamu Miyazaki). Now it is fading. It has already faded down to 13.7 mag (Feb. 26, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   6 33.63   13  2.7   1.761   2.344   113   14.5  19:42 (  0, 68)  
Mar. 12   6 39.68   13 32.2   1.879   2.387   108   14.8  19:28 (  5, 68)  

* C/2021 P4 ( ATLAS )

Now it is 14.7 mag (Feb. 23, Thomas Lehmann). It is expected to brighten up to 11 mag in summer. In the Northern Hemisphere, it stays observable in good condition until 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 October.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   0  8.68   52 39.4   2.769   2.441    60   15.1  19:22 (137, 27)  
Mar. 12   0 25.05   53 26.7   2.726   2.359    58   14.9  19:28 (139, 25)  

* C/2020 K1 ( PanSTARRS )

Now it is 15.2 mag (Mar. 2, 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 until November. But it becomes unobservable after that. In the Southern Hemisphere, it is appearing in the morning sky. It stays observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 54.70   17 27.6   5.374   5.041    65   15.1   5:01 (281, 46)  
Mar. 12  18 57.41   17 36.0   5.250   4.994    69   15.0   4:51 (284, 49)  

* C/2018 U1 ( Lemmon )

Now it is 15.8 mag (Feb. 20, J. L. Virlichie, P. Traverse, H. Roy). It stays at 15-16 mag for a long time. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it locates extremely low in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  17 20.89  -37 46.8   5.117   5.080    82   15.1   5:01 (342, 14)  
Mar. 12  17 19.83  -38 56.5   5.006   5.090    89   15.1   4:51 (346, 14)  

* C/2021 U5 ( Catalina )

Now it is 15.3 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It continues brightening even after the perihelion passage. It is observable at 15 mag in good condition for a while.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  10 17.58  -16 31.8   1.465   2.400   154   15.2  23:25 (  0, 39)  
Mar. 12  10 17.07  -13 33.4   1.474   2.414   155   15.2  22:57 (  0, 42)  

* C/2020 M5 ( ATLAS )

Now it is 14.3 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It became brighter after the perihelion passage. It stays observable at 14-15 mag for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  11 59.28   10 16.3   2.601   3.568   165   15.2   1:11 (  0, 65)  
Mar. 12  11 46.05    9 45.2   2.618   3.605   172   15.3   0:30 (  0, 65)  

* C/2020 T2 ( Palomar )

It brightened up to 9.5 mag in early summer in 2021 (June 27, Marco Goiato). Now it is fading. It has faded down to 12.7 mag in autumn (Nov. 22, Thomas Lehmann). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it is not observable until June when the comet will fade down to 17 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  21 36.44  -31 32.0   4.176   3.377    32   15.4   5:01 (298,-15)  
Mar. 12  21 47.32  -31 17.8   4.184   3.435    36   15.6   4:51 (299,-13)  

* C/2020 PV6 ( PanSTARRS )

Now it is 16.2 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  15 10.57   38 11.1   2.302   2.872   115   15.6   4:21 (180, 87)  
Mar. 12  14 50.67   40 38.2   2.275   2.916   121   15.7   3:34 (180, 85)  

* 70P/Kojima

Now it is 14.8 mag (Mar. 1, Sandor Szabo). It stays 15 mag until March, and it is observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  11 43.07   11 32.8   1.253   2.233   168   15.8   0:54 (  0, 66)  
Mar. 12  11 38.39   12 20.9   1.271   2.257   170   15.9   0:22 (  0, 67)  

* 45P/Honda-Mrkos-Pajdusakova

It has not been observed yet in this apparition. It will brighten very rapidly up to 9 mag in May. The condition is very bad in this apparition. It is observable only in the extremely low sky from mid May to mid July in the Northern Hemisphere, or from early June to early August in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  22 14.47  -12 52.0   2.055   1.114    13   16.8   5:01 (277,-12)  
Mar. 12  22 41.76  -10 18.1   1.958   1.016    13   15.8   4:51 (274,-13)  

* 110P/Hartley 3

It brightened rapidly. Now it is 15.8 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a while. But it will fade out rapidly after this, and it will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   7 51.29   13 26.2   1.818   2.595   132   16.0  20:59 (  0, 68)  
Mar. 12   7 51.53   13 14.8   1.899   2.609   125   16.2  20:32 (  0, 68)  

* C/2020 H6 ( ATLAS )

Now it is 15.8 mag (Feb. 21, ATLAS-MLO, Mauna Loa). It stays observable at 16 mag from 2021 to 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  16 19.06   23  3.1   4.554   4.860   102   16.1   5:01 (331, 76)  
Mar. 12  16 20.23   24 55.7   4.495   4.874   106   16.1   4:51 (345, 80)  

* 73P/Schwassmann-Wachmann 3

Now it is 17.4 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag from summer to autumn. It stays observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes extremely low from August to September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  10 26.41   30 21.7   1.359   2.294   154   16.3  23:33 (  0, 85)  
Mar. 12  10 16.07   31 12.0   1.332   2.235   147   16.1  22:55 (  0, 86)  

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.3 mag (Feb. 26, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag until March, and it stays observable in excellent condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   6  2.35   11 35.2   3.573   3.965   106   16.2  19:22 (  7, 66)  
Mar. 12   6  4.59   12 27.6   3.677   3.970    99   16.3  19:28 ( 26, 66)  

* 325P/Yang-Gao

It has not been observed yet in this apparition. It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than 19.2 mag (Jan. 22, John Drummond).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  17 46.83  -33 35.3   1.312   1.457    77   16.5   5:01 (335, 16)  
Mar. 12  18 12.78  -32 28.1   1.266   1.445    78   16.4   4:51 (333, 16)  

* C/2020 O2 ( Amaral )

Now it is 16.3 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It was observed at 15 mag in 2021. Now it is fading. It stays observable at 17 mag for a while in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 37.02    7  5.2   5.379   5.078    67   16.6   5:01 (296, 43)  
Mar. 12  18 40.15    8 27.8   5.303   5.094    72   16.6   4:51 (298, 46)  

* P/2021 N2 ( Fuls )

Brightened rapidly. Now it is 16.5 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It becomes too low to observe in mid March in the Southern Hemisphere, or in mid April in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   2 48.44   13  0.9   4.260   3.854    59   16.7  19:22 ( 78, 39)  
Mar. 12   2 55.72   13 23.8   4.354   3.861    54   16.7  19:28 ( 83, 34)  

* C/2020 S4 ( PanSTARRS )

Now it is 17.1 mag (Feb. 20, C. Bell). It will brighten up to 14 mag in early 2023. It stays observable in good condition until spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   4 25.56    8 17.0   4.611   4.581    82   16.7  19:22 ( 49, 54)  
Mar. 12   4 29.07    8 57.5   4.673   4.540    76   16.7  19:28 ( 59, 49)  

* 81P/Wild 2

Now it is 17.0 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). 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)  
Mar.  5   3 21.91   15 39.6   3.143   2.922    68   16.9  19:22 ( 74, 47)  
Mar. 12   3 28.95   16 12.4   3.197   2.883    62   16.8  19:28 ( 80, 42)  

* 8P/Tuttle

It brightened very rapidly, and brightened up to 8.9 mag (Sept. 11, Chris Wyatt). Now it is fading. It has already faded down to 18.5 mag (Feb. 11, J. L. Virlichie, P. Traverse, H. Roy). In the Southern Hemisphere, it stays observable after this while the comet will be fading. It is not observable after this in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  17 52.93  -55 42.1   2.686   2.656    77   16.8   5:01 (343, -4)  
Mar. 12  17 57.38  -55 59.1   2.662   2.723    82   17.0   4:51 (345, -4)  

* C/2020 F7 ( Lemmon )

Now it is 17.2 mag (Jan. 18, J. Drummond). 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 locates extremely low, and it is observable only until April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   7  2.79  -46 18.4   5.044   5.395   105   16.8  20:10 (  0,  9)  
Mar. 12   6 56.42  -45 46.5   5.097   5.403   102   16.9  19:36 (  0,  9)  

* 430P/2021 Q2 ( Scotti )

First return of a new periodic comet which brightened up to 17 mag in 2011. Now it is extremely faint as 20.4 mag (Feb. 4, J.-G. Bosch, F. Kugel, A. Klotz, J. Nicolas). It brightened up to 16.8 mag in October (Oct. 10, Ken-ichi Kadota), however, it has been fading after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  15 25.88  -14 53.6   1.171   1.787   111   16.9   4:36 (  0, 40)  
Mar. 12  15 30.48  -15 20.9   1.139   1.819   116   16.9   4:13 (  0, 40)  

* C/2019 O3 ( Palomar )

Now it is 16.4 mag (Feb. 21, ATLAS-HKO, Haleakala). Fading slowly. 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)  
Mar.  5  19 19.28   53 45.7   9.256   9.065    75   16.9   5:01 (226, 49)  
Mar. 12  19 21.40   54 44.0   9.246   9.074    76   16.9   4:51 (224, 52)  

* 152P/Helin-Lawrence

It will brighten up to 16 mag from spring to summer. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  18 54.29  -21 58.5   3.455   3.107    61   17.0   5:01 (315, 18)  
Mar. 12  19  3.55  -21 57.7   3.373   3.111    66   17.0   4:51 (317, 20)  

* C/2020 F2 ( ATLAS )

Now it is 16.9 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17-18 mag for a long time until 2024.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  14 27.25   -2 18.8   8.207   8.851   127   17.0   3:38 (  0, 53)  
Mar. 12  14 23.92   -1 47.4   8.111   8.847   135   17.0   3:07 (  0, 53)  

* 99P/Kowal 1

Now it is 16.5 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). 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)  
Mar.  5  13 42.20   -9 42.1   3.935   4.708   136   17.1   2:53 (  0, 45)  
Mar. 12  13 40.36   -9 35.1   3.865   4.708   144   17.1   2:24 (  0, 45)  

* C/2020 U5 ( PanSTARRS )

Now it is 16.7 mag (Feb. 17, D. Buczynski). It started fading before the perihelion passage. It was predicted to stay at 16 mag for a long time, but actually, it will be fainter than 18 mag in autumn. 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)  
Mar.  5  23 36.30   76 14.7   3.783   3.786    82   17.1  19:22 (164, 32)  
Mar. 12  23 43.79   75 37.2   3.837   3.779    79   17.2  19:28 (164, 30)  

* C/2021 G2 ( ATLAS )

Now it is 16.8 mag (Feb. 11, ATLAS Chile, Rio Hurtado). It will brighten up to 13-14 mag from 2024 to 2025.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   7 10.33  -30  3.5   7.891   8.341   113   17.2  20:18 (  0, 25)  
Mar. 12   7  9.62  -29 33.8   7.909   8.304   110   17.2  19:50 (  0, 25)  

* 52P/Harrington-Abell

It brightened up to 16.4 mag from autumn to winter (Oct. 6, ATLAS-MLO, Mauna Loa). Now it is fading. It has already faded down to 18.0 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  12 44.98  -12 50.8   1.341   2.244   147   17.3   1:56 (  0, 42)  
Mar. 12  12 39.11  -13  2.6   1.338   2.280   155   17.4   1:23 (  0, 42)  

* 132P/Helin-Roman-Alu 2

It brightened up to 13.1 mag in autumn (Oct. 28, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. But it is still bright as 16.2 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). Sandor Szabo reported it is 15.0 mag visually on Mar. 1. It stays observable in good condition for a long time.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   3 46.17   14 28.9   2.048   2.007    73   17.3  19:22 ( 68, 51)  
Mar. 12   4  1.26   15 26.4   2.149   2.042    70   17.6  19:28 ( 73, 48)  

* 254P/McNaught

Now it is 17.5 mag (Feb. 20, ATLAS-MLO, Mauna Loa). It continued brightening for a while 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)  
Mar.  5   4 31.83   -3 48.2   4.097   4.084    82   17.4  19:22 ( 37, 45)  
Mar. 12   4 35.78   -2 43.8   4.210   4.103    77   17.5  19:28 ( 46, 41)  

* C/2019 T2 ( Lemmon )

Now it is 18.4 mag (Jan. 9, J. Drummond). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is observable in low sky in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  10 16.11  -48 19.7   3.500   4.144   124   17.5  23:22 (  0,  7)  
Mar. 12  10  6.23  -46 17.9   3.520   4.194   127   17.6  22:45 (  0,  9)  

* 274P/Tombaugh-Tenagra

Now it is 17.8 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag from November to March. 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)  
Mar.  5   5 36.00   32  1.2   2.082   2.466   100   17.5  19:22 ( 72, 82)  
Mar. 12   5 43.58   32 19.5   2.161   2.461    95   17.6  19:28 ( 83, 77)  

* C/2021 Y1 ( ATLAS )

Now it is 17.5 mag (Feb. 17, J. L. Martin). It is expected to brighten up to 12 mag from winter to summer in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 spring. In the Southern Hemisphere, it is not observable until summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   1 56.22   45 16.9   5.292   4.950    64   17.6  19:22 (123, 41)  
Mar. 12   2  2.76   44 35.6   5.322   4.891    59   17.5  19:28 (123, 36)  

* C/2018 N2 ( ASASSN )

Now it is 17.8 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. It locates extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  14 45.81   45 43.2   7.375   7.885   117   17.6   3:56 (180, 79)  
Mar. 12  14 42.26   46 11.3   7.388   7.932   120   17.6   3:25 (180, 79)  

* C/2020 U4 ( PanSTARRS )

Now it is 18.6 mag (Feb. 6, ATLAS-MLO, Mauna Loa). It stays 17-18 mag for a long time from 2021 to 2022. It is observable in excellent condition in the Northern Hemisphere, In the Southern Hemisphere, it is not observable until June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   2 37.17   26 53.8   5.756   5.360    61   17.6  19:22 ( 96, 43)  
Mar. 12   2 36.98   26 43.6   5.867   5.357    54   17.7  19:28 (100, 37)  

* A/2021 X1

Now it is 17.1 mag (Feb. 18, J.-G. Bosch, F. Kugel). It will brighten up to 15-16 mag in 2023. Cometary activity was detected by Cristovao Jacques on Dec. 12, and by Luca Buzzi and Andrea Aletti on Feb. 23.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   6 39.40  -20 15.8   4.771   5.201   110   17.6  19:47 (  0, 35)  
Mar. 12   6 33.77  -19 17.1   4.817   5.155   104   17.7  19:28 (  4, 36)  

* (3200) Phaethon

In the Northern Hemisphere, it is observable until April when it brightens up to 16 mag. It is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   2 16.51   18 22.6   1.794   1.453    54   17.8  19:22 ( 89, 35)  
Mar. 12   2 25.50   18 18.0   1.796   1.368    49   17.6  19:28 ( 92, 30)  

* C/2017 Y2 ( PanSTARRS )

Now it is 17.7 mag (Feb. 19, J. L. Virlichie, P. Traverse, H. Roy). It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  15 29.08  -39 41.4   5.675   5.982   103   17.7   4:40 (  0, 15)  
Mar. 12  15 23.82  -40 20.7   5.594   6.015   110   17.7   4:07 (  0, 15)  

* 440P/2021 W2 ( Kobayashi )

First return of a new periodic comet which brightened up to 16.5 mag in 1997. Now it is 17.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It was fainter than originally predicted at the recovery, but it brightened very rapidly. It is observable in good condition from January to March.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   8 24.14   22 11.1   1.220   2.073   138   17.8  21:32 (  0, 77)  
Mar. 12   8 25.17   20 55.6   1.259   2.065   132   17.8  21:06 (  0, 76)  

* P/2020 V4 ( Rankin )

Now it is 17.6 mag (Feb. 20, ATLAS-MLO, Mauna Loa). It will be fainter than 18 mag soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   7 37.85    5  8.3   4.593   5.279   129   17.8  20:46 (  0, 60)  
Mar. 12   7 37.45    5 29.3   4.683   5.286   122   17.8  20:18 (  0, 60)  

* C/2021 D2 ( ZTF )

Now it is 17.1 mag (Feb. 23, Thomas Lehmann). It was expected to brighten up to 15.5 mag in winter. But actually, it is fading even before the perihelion passage. In the Northern Hemisphere, it stays observable in good condition for a long time. It is not observable at all in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   6 15.26   78 28.5   2.626   2.961    99   17.8  19:26 (180, 47)  
Mar. 12   6 18.40   74 36.0   2.682   2.968    96   17.9  19:28 (177, 51)  

* C/2021 C5 ( PanSTARRS )

Now it is 17.4 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is observable only until May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  10  7.91  -15 55.8   3.619   4.532   154   17.9  23:15 (  0, 39)  
Mar. 12  10  2.03  -16  9.8   3.594   4.490   151   17.8  22:41 (  0, 39)  

* 230P/LINEAR

Now it is 18.5 mag (Feb. 20, Palomar Mountain--ZTF). It was expected to brighten up to 16.5-17 mag in winter. In its last apparition in 2015, it brightened up to 13 mag. But in this apparition, the brightness evolution is completely asteroidal.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5   1 52.20    1 34.8   2.142   1.576    43   18.3  19:22 ( 77, 21)  
Mar. 12   2 10.79    3 59.9   2.169   1.571    41   18.3  19:28 ( 81, 20)  

* C/2021 O1 ( Nishimura )

Now it is 18.7 mag (Feb. 13, Giuseppe Pappa). It was observed at 9-10 mag from late July to early August. Although it had been unobservable for a long time, it is appearing in the morning sky now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar.  5  16 42.70  -29 34.6   3.024   3.198    90   19.5   5:01 (347, 24)  
Mar. 12  16 42.98  -30 15.4   2.996   3.281    97   19.6   4:51 (352, 24)  

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