Weekly Information about Bright Comets (2022 Mar. 26: North)

Japanese version
Home page
Updated on March 26, 2022
Last week South Next week

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.

---------------------------------------------------------------------

* C/2021 O3 ( PanSTARRS )

It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). It is expected to brighten up to 4.5 mag in April. However, it is not observable now. 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. 26   0 46.32   -0 54.6   1.758   0.780     7   10.1  19:41 ( 99,-14)  
Apr.  2   1 12.27   -1  6.8   1.590   0.624     9    9.0  19:47 (100,-16)  

* C/2021 F1 ( Lemmon-PanSTARRS )

Brightened very rapidly. Now it is very bright as 9.3 mag (Mar. 24, Michael Jager). It stays 9-10 mag until spring. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it is not observable until late May. But it will be observable in good condition after that.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   0 33.30   30 37.2   1.769   1.016    28   10.3  19:41 (126,  3)  
Apr.  2   0 54.14   26 52.0   1.849   0.999    22   10.3  19:47 (125, -2)  

* C/2017 K2 ( PanSTARRS )

Now it is bright as 11.1 mag (Mar. 16, Ken-ichi Kadota). The brightness evolution is slower than originally expected. It is expected to be observable at 7 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. 26  18 52.56   11 31.8   3.653   3.637    81   10.6   4:31 (301, 52)  
Apr.  2  18 54.26   11 37.6   3.492   3.574    86   10.4   4:20 (305, 55)  

* C/2019 L3 ( ATLAS )

Now it is 9.9 mag (Mar. 22, Chris Wyatt). 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. 26   6 39.70   17 28.3   3.403   3.620    94   10.5  19:41 ( 48, 66)  
Apr.  2   6 43.11   16 30.2   3.519   3.633    88   10.6  19:47 ( 59, 60)  

* 19P/Borrelly

Now it is bright as 9.8 mag (Mar. 22, Chris Wyatt). 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. 26   4  1.94   34 37.7   1.630   1.445    61   10.6  19:41 (107, 43)  
Apr.  2   4 27.03   37  4.6   1.697   1.481    60   10.9  19:47 (111, 42)  

* 22P/Kopff

Now it is 11.8 mag (Mar. 4, 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. 26  21 17.92  -14 56.8   2.039   1.554    47   10.9   4:31 (295,  8)  
Apr.  2  21 38.61  -13 34.3   2.012   1.560    49   10.9   4:20 (293,  8)  

* C/2019 T4 ( ATLAS )

Now it is bright as 12.3 mag (Mar. 22, Chris Wyatt). It stays 11-12 mag until July. It stas observable in good condition for a long time. It locates high after this also in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  11 53.70  -22 44.2   3.345   4.288   158   11.5  23:38 (  0, 32)  
Apr.  2  11 51.00  -21 14.3   3.332   4.280   159   11.5  23:08 (  0, 34)  

* 9P/Tempel 1

Now it is 13.4 mag (Mar. 4, Thomas Lehmann). 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. 26  19 59.63  -22 47.8   1.635   1.558    67   12.2   4:31 (314, 16)  
Apr.  2  20 20.30  -22 34.6   1.601   1.569    69   12.2   4:20 (313, 15)  

* 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 10.8 mag (Mar. 5, Thomas Lehmann). 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. 26  21  8.71  -35 11.2   1.973   1.671    57   12.2   4:31 (311, -4)  
Apr.  2  21  2.05  -35 32.7   1.935   1.775    65   12.4   4:20 (315,  0)  

* 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. 26  23 43.33   -3 53.8   1.783   0.823    10   13.5   4:31 (265,-14)  
Apr.  2   0 18.30   -0  1.9   1.709   0.732     7   12.2   4:20 (259,-16)  

* C/2021 E3 ( ZTF )

Now it is 13.6 mag (Mar. 20, ATLAS Chile). 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. 26  20 42.01  -24  3.4   2.370   2.036    58   13.0   4:31 (307,  8)  
Apr.  2  20 50.25  -26 36.2   2.209   1.995    64   12.7   4:20 (310,  8)  

* 104P/Kowal 2

It brightened very rapidly up to 9.2 mag in winter (Jan. 31, Chris Wyatt). Now it is fading. But it is still bright as 11.2 mag (Mar. 22, Chris Wyatt). It will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   6 35.46   15 33.2   0.970   1.434    93   13.0  19:41 ( 47, 64)  
Apr.  2   7  1.47   15 39.2   1.055   1.490    92   13.7  19:47 ( 50, 63)  

* C/2020 Y2 ( ATLAS )

Now it is 14.1 mag (Mar. 22, Chris Wyatt). 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. 26   7 27.57  -64 51.2   2.925   3.236    99   13.4  19:41 (  3,-10)  
Apr.  2   7  7.58  -62 11.9   2.942   3.219    96   13.4  19:47 ( 10, -9)  

* 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 13.3 mag (Mar. 22, Chris Wyatt). 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. 26   8 37.70   24  3.3   1.348   2.043   120   13.5  20:23 (  0, 79)  
Apr.  2   8 44.04   23 15.2   1.468   2.099   115   13.9  20:02 (  0, 78)  

* 116P/Wild 4

Now it is 13.2 mag (Mar. 22, Chris Wyatt). It is observable at 13 mag in good condition until early summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   9 24.95   19 15.2   1.542   2.334   132   13.6  21:10 (  0, 74)  
Apr.  2   9 24.84   18 57.5   1.589   2.318   125   13.6  20:42 (  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. 26   4 32.16   29  4.0   6.306   5.970    65   13.8  19:41 ( 97, 47)  
Apr.  2   4 36.45   29  2.9   6.408   5.972    60   13.9  19:47 (100, 41)  

* 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. 26  16 20.44   39 56.6   4.417   4.862   110   14.0   4:08 (180, 85)  
Apr.  2  16 12.34   40 57.3   4.327   4.823   114   13.9   3:32 (180, 84)  

* 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. 26  11 41.50   60 20.8   4.277   4.816   117   14.0  23:25 (180, 65)  
Apr.  2  11 25.93   61  1.0   4.286   4.760   112   13.9  22:42 (180, 64)  

* 117P/Helin-Roman-Alu 1

Now it is 15.8 mag (Mar. 15, Slooh.com Chile Observatory). It will brighten up to 13 mag in summer.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  18 40.13  -26 24.6   2.987   3.083    86   14.2   4:31 (332, 23)  
Apr.  2  18 47.04  -26 37.0   2.886   3.077    91   14.1   4:20 (334, 23)  

* 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. 26  22 45.17  -54  7.6   3.819   3.420    59   14.3   4:31 (318,-28)  
Apr.  2  22 47.10  -54  1.7   3.711   3.387    63   14.1   4:20 (319,-26)  

* 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. 26  13 31.48   24 45.4   3.699   4.574   147   14.3   1:20 (  0, 80)  
Apr.  2  13 21.29   26 22.5   3.740   4.616   147   14.3   0:42 (  0, 81)  

* C/2021 P4 ( ATLAS )

Now it is 14.3 mag (Mar. 8, 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. 26   1  3.25   55 18.6   2.627   2.196    54   14.5  19:41 (143, 22)  
Apr.  2   1 25.67   56 18.9   2.573   2.115    52   14.3  19:47 (145, 21)  

* 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 stays observable in good condition after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  19  1.32   17 58.2   4.988   4.900    79   14.8   4:31 (290, 55)  
Apr.  2  19  2.39   18 11.0   4.852   4.853    84   14.7   4:20 (294, 58)  

* C/2018 U1 ( Lemmon )

Now it is 15.9 mag (Mar. 5, Thomas Lehmann). 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. 26  17 14.68  -41 22.5   4.791   5.112   103   15.0   4:31 (354, 13)  
Apr.  2  17 10.37  -42 37.6   4.691   5.124   110   15.0   4:20 (358, 12)  

* 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. 26  11 20.66    8 33.6   2.717   3.679   162   15.0  23:04 (  0, 63)  
Apr.  2  11  9.23    7 53.8   2.798   3.718   153   15.1  22:26 (  0, 63)  

* C/2021 U5 ( Catalina )

Now it is 15.3 mag (Mar. 9, Ken-ichi Kadota). 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. 26  10 18.21   -7 29.1   1.538   2.450   149   15.3  22:03 (  0, 48)  
Apr.  2  10 20.09   -4 36.2   1.591   2.472   144   15.4  21:38 (  0, 50)  

* 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 13.8 mag (Mar. 15, Ken-ichi Kadota). 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. 26   6 54.10   14 17.7   2.127   2.474    98   15.4  19:41 ( 37, 65)  
Apr.  2   7  2.23   14 33.5   2.254   2.517    93   15.7  19:47 ( 49, 62)  

* 73P/Schwassmann-Wachmann 3

Now it is 17.0 mag (Mar. 21, ATLAS-MLO, Mauna Loa). 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. 26   9 57.07   32  1.2   1.311   2.115   132   15.7  21:41 (  0, 87)  
Apr.  2   9 49.55   31 59.1   1.314   2.054   124   15.4  21:07 (  0, 87)  

* 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. 26  22  7.67  -30 55.0   4.182   3.551    45   15.9   4:31 (300,-11)  
Apr.  2  22 17.12  -30 47.4   4.172   3.610    49   16.0   4:20 (301, -9)  

* C/2020 PV6 ( PanSTARRS )

Now it is 15.9 mag (Mar. 2, ATLAS-MLO, Mauna Loa). 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. 26  14  1.92   44 19.7   2.286   3.007   128   16.0   1:51 (180, 81)  
Apr.  2  13 34.96   45 16.7   2.327   3.054   128   16.1   0:57 (180, 80)  

* C/2020 H6 ( ATLAS )

Now it is 15.9 mag (Mar. 6, Toshihiko Ikemura, Hirohisa Sato). 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. 26  16 20.34   28 45.2   4.406   4.904   114   16.1   4:08 (  0, 84)  
Apr.  2  16 19.23   30 39.0   4.376   4.920   117   16.1   3:39 (  0, 86)  

* C/2022 E3 ( ZTF )

Now it is 16.1 mag (Mar. 21, D. Buczynski). It will approach to Earth down to 0.29 a.u. in 2023 February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it becomes unobservable from late September to early February.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  20  9.39    5 29.6   4.401   4.034    62   16.3   4:31 (289, 34)  
Apr.  2  20 11.58    6 47.4   4.231   3.961    67   16.1   4:20 (291, 38)  

* 70P/Kojima

Now it is 16.0 mag (Mar. 9, Toshihiko Ikemura, Hirohisa Sato). It is bright as 14.8 mag visually (Mar. 1, Sandor Szabo). It will be fading after this, and it will be fainter than 18 mag in June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  11 29.54   13 32.3   1.344   2.308   160   16.1  23:14 (  0, 68)  
Apr.  2  11 26.08   13 52.3   1.398   2.334   153   16.3  22:43 (  0, 69)  

* 325P/Yang-Gao

Now it is 19.2 mag (Feb. 28, Hidetaka Sato). It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than predicted by 3 mag.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  19  1.33  -29  6.1   1.184   1.432    81   16.2   4:31 (329, 18)  
Apr.  2  19 23.39  -26 55.3   1.148   1.432    83   16.1   4:20 (326, 19)  

* 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 will be unobservable in June. But it will become observable again at 17 mag from autum to winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   6 11.33   14  4.0   3.892   3.981    87   16.5  19:41 ( 55, 59)  
Apr.  2   6 15.73   14 47.7   4.001   3.987    82   16.5  19:47 ( 65, 54)  

* 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. 26   3 45.14   17 20.5   3.287   2.803    53   16.6  19:41 ( 89, 32)  
Apr.  2   3 54.22   17 54.7   3.324   2.763    48   16.5  19:47 ( 94, 27)  

* 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. 26   7 55.83   12 48.8   2.080   2.638   113   16.5  19:41 (  0, 68)  
Apr.  2   7 59.69   12 33.6   2.178   2.653   107   16.7  19:47 ( 18, 67)  

* 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 16-17 mag for a while in 2022.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  18 44.86   11 22.7   5.150   5.127    83   16.6   4:31 (303, 54)  
Apr.  2  18 46.37   12 54.1   5.076   5.145    88   16.6   4:20 (306, 57)  

* C/2020 S4 ( PanSTARRS )

Now it is 16.9 mag (Mar. 8, Michael Jager). It will brighten up to 14 mag in early 2023. It becomes unobservable temporarily in May. But it will appear in the morning sky again in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   4 37.89   10 17.7   4.790   4.460    64   16.7  19:41 ( 74, 39)  
Apr.  2   4 43.12   10 56.8   4.843   4.420    59   16.7  19:47 ( 79, 34)  

* 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. 26  19 20.52  -21 55.1   3.199   3.119    76   16.8   4:31 (321, 22)  
Apr.  2  19 28.11  -21 54.3   3.110   3.124    81   16.8   4:20 (323, 23)  

* P/2021 N2 ( Fuls )

Brightened rapidly. Now it is 16.5 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will be too low to observe soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   3 11.22   14 10.8   4.526   3.877    44   16.8  19:41 ( 91, 24)  
Apr.  2   3 19.37   14 34.2   4.604   3.885    39   16.9  19:47 ( 95, 19)  

* C/2020 F2 ( ATLAS )

Now it is 17.0 mag (Mar. 12, ATLAS-MLO, Mauna Loa). 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. 26  14 16.22   -0 41.3   7.959   8.841   150   16.9   2:04 (  0, 54)  
Apr.  2  14 11.94   -0  7.5   7.906   8.838   157   16.9   1:33 (  0, 55)  

* 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. 26  15 33.57  -15 58.4   1.084   1.886   129   16.9   3:22 (  0, 39)  
Apr.  2  15 32.00  -16  9.1   1.064   1.922   137   17.0   2:53 (  0, 39)  

* C/2020 F7 ( Lemmon )

Brightened rapidly up to 16.4 mag in autumn (Nov. 14, F. Kugel, M. Audejean, J. Nicolas, J.-G. Bosch). 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. It is fainter than this ephemeris recently, 17.9 mag (Mar. 3, J. Drummond).

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   6 46.98  -44 34.2   5.217   5.421    96   16.9  19:41 ( 12,  9)  
Apr.  2   6 43.86  -43 56.9   5.281   5.431    93   17.0  19:47 ( 19,  7)  

* C/2019 O3 ( Palomar )

Now it is 16.9 mag (Mar. 6, Toshihiko Ikemura, Hirohisa Sato). 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. 26  19 24.20   56 47.1   9.224   9.093    79   17.0   4:31 (218, 55)  
Apr.  2  19 24.77   57 50.9   9.213   9.103    80   17.0   4:20 (215, 57)  

* 99P/Kowal 1

Now it is 16.9 mag (Mar. 12, ATLAS-MLO, Mauna Loa). 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. 26  13 35.13   -9 12.7   3.759   4.707   159   17.0   1:23 (  0, 46)  
Apr.  2  13 31.93   -8 58.3   3.726   4.706   167   17.0   0:53 (  0, 46)  

* C/2021 G2 ( ATLAS )

Now it is 16.9 mag (Mar. 8, Toshihiko Ikemura, Hirohisa Sato). 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. 26   7  9.54  -28 30.4   7.961   8.229   102   17.2  19:41 ( 11, 26)  
Apr.  2   7 10.19  -27 58.0   7.993   8.192    98   17.1  19:47 ( 19, 24)  

* C/2020 U5 ( PanSTARRS )

Now it is 17.1 mag (Mar. 4, A. Diepvens). 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. 26  23 57.34   74 59.5   3.935   3.767    73   17.3   4:31 (196, 29)  
Apr.  2   0  3.35   74 58.1   3.977   3.763    70   17.3   4:20 (197, 30)  

* 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 19 mag (Mar. 19, WISE). 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. 26  18  0.16  -56 36.3   2.604   2.855    94   17.4   4:31 (349, -3)  
Apr.  2  17 58.23  -56 54.8   2.573   2.920   100   17.6   4:20 (352, -3)  

* 254P/McNaught

Now it is 17.7 mag (Mar. 8, Michael Jager). 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. 26   4 45.23   -0 43.6   4.431   4.140    66   17.6  19:41 ( 62, 33)  
Apr.  2   4 50.62    0 11.9   4.538   4.159    61   17.7  19:47 ( 68, 28)  

* 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. 26  12 25.73  -12 57.6   1.368   2.354   168   17.6   0:14 (  0, 42)  
Apr.  2  12 19.10  -12 44.1   1.402   2.392   169   17.8  23:36 (  0, 42)  

* 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. 26   9 51.27  -16 23.9   3.585   4.406   141   17.7  21:36 (  0, 38)  
Apr.  2   9 46.71  -16 25.8   3.600   4.364   135   17.7  21:04 (  0, 38)  

* A/2021 X1

Now it is 17.2 mag (Mar. 8, Toshihiko Ikemura, Hirohisa Sato). 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. 26   6 25.10  -17 18.2   4.927   5.064    92   17.7  19:41 ( 26, 33)  
Apr.  2   6 22.01  -16 20.3   4.986   5.018    86   17.7  19:47 ( 36, 30)  

* C/2017 Y2 ( PanSTARRS )

Now it is 17.1 mag (Feb. 28, Hidetaka Sato). It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  15 10.56  -41 28.3   5.458   6.082   124   17.7   2:59 (  0, 13)  
Apr.  2  15  2.65  -41 54.4   5.406   6.116   131   17.7   2:24 (  0, 13)  

* 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. 26  14 33.64   46 56.0   7.442   8.026   122   17.7   2:22 (180, 78)  
Apr.  2  14 28.72   47 11.0   7.483   8.073   123   17.7   1:49 (180, 78)  

* 132P/Helin-Roman-Alu 2

It brightened up to 13.1 mag in autumn (Oct. 28, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 17.0 mag (Mar. 13, Catalina Sky Survey). 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. 26   4 31.50   17  3.9   2.355   2.115    63   17.7  19:41 ( 82, 42)  
Apr.  2   4 46.59   17 43.7   2.459   2.153    60   18.0  19:47 ( 86, 38)  

* 274P/Tombaugh-Tenagra

Now it is 17.8 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable in good condition in the Northern Hemisphere, but it locates low in the Southern Hemisphere. It will be fainter than 18 mag soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   6  2.09   32 47.1   2.323   2.455    85   17.7  19:41 ( 93, 67)  
Apr.  2   6 12.78   32 55.6   2.404   2.454    80   17.8  19:47 ( 96, 62)  

* 61P/Shajn-Schaldach

It has not been observed yet in this apparition. appearing in the morning sky. It will brighten up to 15 mag in autumn, and it will be observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26  22  0.18   -9 55.0   3.365   2.630    36   17.9   4:31 (284,  3)  
Apr.  2  22 12.09   -8 55.6   3.284   2.602    40   17.8   4:20 (284,  5)  

* 440P/2021 W2 ( Kobayashi )

First return of a new periodic comet which brightened up to 16.5 mag in 1997. Now it is 17.5 mag (Mar. 9, Hirohisa Sato). It was fainter than originally predicted at the recovery, but it brightened very rapidly. It will be fading after this, and it will be fainter than 18 mag in April.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   8 32.09   18 20.1   1.359   2.057   120   17.9  20:18 (  0, 73)  
Apr.  2   8 37.74   17  1.1   1.418   2.056   115   17.9  19:56 (  0, 72)  

* P/2020 V4 ( Rankin )

Now it is 18.1 mag (Mar. 10, ATLAS-HKO, Haleakala). It will be fainter than 18 mag soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Mar. 26   7 38.45    6  8.8   4.883   5.303   109   17.9  19:41 (  9, 61)  
Apr.  2   7 39.85    6 26.4   4.991   5.311   103   18.0  19:47 ( 25, 59)  

---------------------------------------------------------------------

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