Weekly Information about Bright Comets (2022 Apr. 2: North)

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 Updated on April 2, 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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* 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)  
Apr.  2   1 12.27   -1  6.8   1.590   0.624     9    9.0  19:47 (100,-16)  
Apr.  9   1 43.87   -1  7.8   1.396   0.466    12    7.4  19:54 (101,-16)

* C/2021 F1 ( Lemmon-PanSTARRS )

Brightened very rapidly. Now it is very bright as 9.3 mag (Mar. 24, Michael Jager). Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky in late May. Then it stays observable in good condition after that. In the Northern Hemisphere, it will never be observable again. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2   0 54.14   26 52.0   1.849   0.999    22    9.3  19:47 (125, -2)  
Apr.  9   1 12.10   23 15.2   1.921   0.996    15    9.4  19:54 (125, -7)

* C/2019 L3 ( ATLAS )

Now it is 9.9 mag (Mar. 22, Chris Wyatt). It will be getting lower after this. In the Northern Hemisphere, 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)  
Apr.  2   6 43.11   16 30.2   3.519   3.633    88   10.1  19:47 ( 59, 60)  
Apr.  9   6 47.20   15 34.5   3.636   3.647    82   10.2  19:54 ( 66, 54)

* 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)  
Apr.  2  18 54.26   11 37.6   3.492   3.574    86   10.4   4:20 (305, 55)  
Apr.  9  18 55.12   11 43.0   3.330   3.510    91   10.2   4:09 (310, 58)

* 22P/Kopff

Now it is 12.4 mag (Mar. 16, 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)  
Apr.  2  21 38.61  -13 34.3   2.012   1.560    49   10.9   4:20 (293,  8)  
Apr.  9  21 58.67  -12  7.8   1.986   1.568    51   10.9   4:09 (291,  9)

* 19P/Borrelly

Now it is bright as 10.2 mag (Mar. 25, Osamu Miyazaki). It will be fading after this. 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)  
Apr.  2   4 27.03   37  4.6   1.697   1.481    60   10.9  19:47 (111, 42)  
Apr.  9   4 52.98   39  5.8   1.768   1.521    59   11.3  19:54 (114, 41)

* 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)  
Apr.  2   0 18.30   -0  1.9   1.709   0.732     7   12.2   4:20 (259,-16)  
Apr.  9   0 56.52    4 13.0   1.646   0.652     4   11.0   4:09 (252,-17)

* 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)  
Apr.  2  11 51.00  -21 14.3   3.332   4.280   159   11.5  23:08 (  0, 34)  
Apr.  9  11 48.59  -19 40.0   3.334   4.273   156   11.5  22:38 (  0, 35)

* 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)  
Apr.  2  20 20.30  -22 34.6   1.601   1.569    69   12.2   4:20 (313, 15)  
Apr.  9  20 40.22  -22 16.5   1.568   1.582    72   12.2   4:09 (312, 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 11.8 mag (Mar. 16, Thomas Lehmann). It is observable in good condition in the Southern Hemisphere. It will be observable soon also in the Northern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  21  2.05  -35 32.7   1.935   1.775    65   12.4   4:20 (315,  0)  
Apr.  9  20 53.55  -36  1.9   1.889   1.878    73   12.6   4:09 (319,  3)

* C/2021 E3 ( ZTF )

Now it is 11.3 mag (Mar. 16, Thomas Lehmann). It will 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)  
Apr.  2  20 50.25  -26 36.2   2.209   1.995    64   12.7   4:20 (310,  8)  
Apr.  9  20 58.87  -29 37.6   2.047   1.957    70   12.5   4:09 (314,  7)

* 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)  
Apr.  2   7  7.58  -62 11.9   2.942   3.219    96   13.4  19:47 ( 10, -9)  
Apr.  9   6 53.27  -59 26.3   2.970   3.204    94   13.4  19:54 ( 16, -8)

* 116P/Wild 4

Now it is 13.1 mag (Mar. 24, Mitsunori Tsumura). 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)  
Apr.  2   9 24.84   18 57.5   1.589   2.318   125   13.6  20:42 (  0, 74)  
Apr.  9   9 26.25   18 32.9   1.643   2.303   119   13.6  20:16 (  0, 73)

* 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)  
Apr.  2   7  1.47   15 39.2   1.055   1.490    92   13.7  19:47 ( 50, 63)  
Apr.  9   7 25.52   15 31.5   1.148   1.548    91   14.4  19:54 ( 54, 61)

* C/2019 U5 ( PanSTARRS )

Now it is 14.5 mag (Mar. 23, Thomas Lehmann). 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)  
Apr.  2  16 12.34   40 57.3   4.327   4.823   114   13.9   3:32 (180, 84)  
Apr.  9  16  2.85   41 52.3   4.248   4.784   116   13.8   2:56 (180, 83)

* 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)  
Apr.  2   8 44.04   23 15.2   1.468   2.099   115   13.9  20:02 (  0, 78)  
Apr.  9   8 51.08   22 25.8   1.593   2.154   110   14.2  19:54 ( 13, 77)

* 29P/Schwassmann-Wachmann 1

Now it is fainter than 14.3 mag (Mar. 22, Chris Wyatt). 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)  
Apr.  2   4 36.45   29  2.9   6.408   5.972    60   13.9  19:47 (100, 41)  
Apr.  9   4 41.10   29  2.7   6.505   5.974    54   13.9  19:54 (104, 35)

* C/2020 V2 ( ZTF )

Now it is 13.9 mag (Mar. 24, Thomas Lehmann). 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)  
Apr.  2  11 25.93   61  1.0   4.286   4.760   112   13.9  22:42 (180, 64)  
Apr.  9  11 10.47   61 24.5   4.305   4.703   107   13.9  21:59 (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)  
Apr.  2  18 47.04  -26 37.0   2.886   3.077    91   14.1   4:20 (334, 23)  
Apr.  9  18 53.19  -26 50.4   2.786   3.072    96   14.0   4:09 (336, 24)

* 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. In the Northern Hemisphere, it is not observable until August. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  22 47.10  -54  1.7   3.711   3.387    63   14.1   4:20 (319,-26)  
Apr.  9  22 48.39  -54  5.6   3.594   3.354    68   14.0   4:09 (320,-24)

* C/2021 P4 ( ATLAS )

Now it is 13.6 mag (Mar. 21, 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)  
Apr.  2   1 25.68   56 18.9   2.573   2.115    52   14.3  19:47 (145, 21)  
Apr.  9   1 50.75   57 18.3   2.516   2.033    50   14.1  19:54 (147, 20)

* C/2020 K1 ( PanSTARRS )

Now it is 15.1 mag (Mar. 24, Thomas Lehmann). 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)  
Apr.  2  19  2.39   18 11.0   4.852   4.853    84   14.7   4:20 (294, 58)  
Apr.  9  19  2.79   18 23.9   4.714   4.806    89   14.5   4:09 (298, 61)

* 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 14.4 mag (Mar. 22, Thomas Lehmann). 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  13 21.29   26 22.5   3.740   4.616   147   14.6   0:42 (  0, 81)  
Apr.  9  13 10.96   27 47.6   3.803   4.657   144   14.7   0:05 (  0, 83)

* C/2018 U1 ( Lemmon )

Now it is 15.8 mag (Mar. 20, ATLAS Chile). 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)  
Apr.  2  17 10.37  -42 37.6   4.691   5.124   110   15.0   4:20 (358, 12)  
Apr.  9  17  4.79  -43 52.7   4.599   5.136   117   14.9   3:58 (  0, 11)

* C/2020 M5 ( ATLAS )

Now it is 14.6 mag (Mar. 22, Thomas Lehmann). 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)  
Apr.  2  11  9.23    7 53.8   2.798   3.718   153   15.1  22:26 (  0, 63)  
Apr.  9  10 59.00    7 11.9   2.897   3.757   144   15.3  21:48 (  0, 62)

* 73P/Schwassmann-Wachmann 3

Now it is 17.2 mag (Mar. 29, Katsumi Yoshimoto). 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)  
Apr.  2   9 49.55   31 59.1   1.314   2.054   124   15.4  21:07 (  0, 87)  
Apr.  9   9 43.93   31 40.5   1.322   1.992   117   15.2  20:34 (  0, 87)

* 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)  
Apr.  2  10 20.09   -4 36.2   1.591   2.472   144   15.4  21:38 (  0, 50)  
Apr.  9  10 22.92   -1 56.3   1.658   2.496   138   15.5  21:13 (  0, 53)

* 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. 22, Thomas Lehmann). It stays observable in good condition for a long time. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2   7  2.23   14 33.5   2.254   2.517    93   15.7  19:47 ( 49, 62)  
Apr.  9   7 10.85   14 44.5   2.384   2.560    88   16.0  19:54 ( 58, 58)

* 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)  
Apr.  2  16 19.23   30 39.0   4.376   4.920   117   15.8   3:39 (  0, 86)  
Apr.  9  16 17.33   32 29.8   4.357   4.937   120   15.8   3:10 (  0, 87)

* C/2021 T2 ( Fuls )

It is expected to brighten up to 13.5 mag in early summer. In the Southern Hemisphere, it will appear in the morning sky in May. Then it stays observable in good condition after that. In the Northern Hemisphere, it is not observable at all. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2   1 45.59   -5 14.4   2.520   1.603    18   16.1  19:47 ( 92,-12)  
Apr.  9   1 52.55   -6 39.2   2.465   1.541    17   15.8  19:54 ( 95,-18)

* 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)  
Apr.  2  20 11.58    6 47.4   4.231   3.961    67   16.1   4:20 (291, 38)  
Apr.  9  20 13.21    8 11.3   4.057   3.889    73   15.9   4:09 (293, 42)

* 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)  
Apr.  2  22 17.12  -30 47.4   4.172   3.610    49   16.0   4:20 (301, -9)  
Apr.  9  22 26.06  -30 42.8   4.157   3.669    54   16.1   4:09 (302, -8)

* 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)  
Apr.  2  19 23.39  -26 55.3   1.148   1.432    83   16.1   4:20 (326, 19)  
Apr.  9  19 43.73  -24 28.7   1.115   1.437    85   16.1   4:09 (324, 21)

* C/2020 PV6 ( PanSTARRS )

Now it is 16.4 mag (Mar. 22, Thomas Lehmann). 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)  
Apr.  2  13 34.96   45 16.7   2.327   3.054   128   16.1   0:57 (180, 80)  
Apr.  9  13  8.22   45 32.9   2.393   3.101   127   16.3   0:03 (180, 80)

* 70P/Kojima

Now it is 15.8 mag (Mar. 24, Thomas Lehmann). 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)  
Apr.  2  11 26.08   13 52.3   1.398   2.334   153   16.3  22:43 (  0, 69)  
Apr.  9  11 23.60   14  0.8   1.462   2.361   146   16.4  22:13 (  0, 69)

* 81P/Wild 2

Now it is 17.0 mag (Mar. 22, Thomas Lehmann). 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)  
Apr.  2   3 54.22   17 54.7   3.324   2.763    48   16.5  19:47 ( 94, 27)  
Apr.  9   4  3.90   18 28.4   3.355   2.722    43   16.4  19:54 ( 97, 23)

* 402P/2020 Q3 ( LINEAR )

First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.5 mag (Mar. 4, ATLAS-MLO, Mauna Loa). 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)  
Apr.  2   6 15.73   14 47.7   4.001   3.987    82   16.5  19:47 ( 65, 54)  
Apr.  9   6 20.75   15 28.1   4.109   3.993    76   16.6  19:54 ( 72, 49)

* C/2020 O2 ( Amaral )

Now it is 16.2 mag (Mar. 17, D. Buczynski). 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)  
Apr.  2  18 46.37   12 54.1   5.076   5.145    88   16.6   4:20 (306, 57)  
Apr.  9  18 47.26   14 27.5   5.004   5.163    93   16.6   4:09 (310, 61)

* 246P/NEAT

It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It is observable at 16.5-17 mag in 2022. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  23 17.27  -18 15.4   4.329   3.514    31   16.6   4:20 (283,-14)  
Apr.  9  23 26.13  -17 34.0   4.297   3.532    35   16.6   4:09 (283,-12)

* 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)  
Apr.  2   4 43.12   10 56.8   4.843   4.420    59   16.7  19:47 ( 79, 34)  
Apr.  9   4 48.87   11 34.9   4.891   4.381    54   16.7  19:54 ( 85, 28)

* 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)  
Apr.  2  19 28.11  -21 54.3   3.110   3.124    81   16.8   4:20 (323, 23)  
Apr.  9  19 35.03  -21 54.6   3.020   3.129    86   16.7   4:09 (325, 24)

* 110P/Hartley 3

It brightened rapidly up to 14.5 mag in winter (Feb. 9, Toshiyuki Takahashi). Now it is fading rapidly. It has already faded down to 16.3 mag (Mar. 22, Thomas Lehmann). It will be fainter than 18 mag in May. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2   7 59.69   12 33.6   2.178   2.653   107   16.7  19:47 ( 18, 67)  
Apr.  9   8  4.54   12 16.2   2.278   2.669   101   16.9  19:54 ( 34, 64)

* 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)  
Apr.  2  14 11.94   -0  7.5   7.906   8.838   157   16.9   1:33 (  0, 55)  
Apr.  9  14  7.45    0 26.2   7.870   8.835   163   16.9   1:01 (  0, 55)

* 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)  
Apr.  2   6 43.86  -43 56.9   5.281   5.431    93   17.0  19:47 ( 19,  7)  
Apr.  9   6 41.72  -43 21.0   5.347   5.441    90   17.0  19:54 ( 25,  5)

* 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)  
Apr.  2  19 24.77   57 50.9   9.213   9.103    80   17.0   4:20 (215, 57)  
Apr.  9  19 24.68   58 55.5   9.203   9.113    81   17.0   4:09 (211, 58)

* 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)  
Apr.  2  13 31.93   -8 58.3   3.726   4.706   167   17.0   0:53 (  0, 46)  
Apr.  9  13 28.50   -8 42.7   3.708   4.706   175   17.0   0:22 (  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)  
Apr.  2   7 10.19  -27 58.0   7.993   8.192    98   17.1  19:47 ( 19, 24)  
Apr.  9   7 11.29  -27 26.0   8.027   8.155    93   17.1  19:54 ( 27, 22)

* 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)  
Apr.  2   0  3.35   74 58.1   3.977   3.763    70   17.3   4:20 (197, 30)  
Apr.  9   0  8.74   75  7.5   4.013   3.760    68   17.4   4:09 (197, 30)

* C/2019 K7 ( Smith )

It brightened up to 14.2 mag from summer to autumn in 2021 (Sept. 3, C. S. Morris). Now it is 17.2 mag (Mar. 7, ATLAS-MLO, Mauna Loa). Fading slowly. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  16 43.69   65 44.7   6.578   6.781    97   17.4   4:03 (180, 59)  
Apr.  9  16 33.91   66 51.4   6.619   6.819    97   17.4   3:26 (180, 58)

* C/2020 P3 ( ATLAS )

Now it is 17.5 mag (Mar. 11, ATLAS-MLO, Mauna Lao). It stayed 17.5 mag for a long time in 2021. It will be fading slowly after this. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  12 12.13   71  0.5   6.872   7.181   104   17.5  23:28 (180, 54)  
Apr.  9  12  3.07   70 25.4   6.930   7.195   101   17.5  22:52 (180, 55)

* C/2022 A2 ( PanSTARRS )

Now it is 17.6 mag (Mar. 14, Catalina Sky Survey). It is expected to brighten up to 12.5 mag in winter. It will become unobservable temporarily at 17 mag in July. In the Northern Hemisphere, it will become observable again in October. Then it stays observable in good condition after that. In the Southern Hemisphere, it is not observable at the high light. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  11  1.00   -8  6.2   3.208   4.131   154   17.7  22:18 (  0, 47)  
Apr.  9  10 54.01   -6 10.7   3.195   4.067   146   17.6  21:43 (  0, 49)

* 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)  
Apr.  2  17 58.21  -56 54.8   2.573   2.920   100   17.6   4:20 (352, -3)  
Apr.  9  17 53.94  -57 11.1   2.544   2.985   106   17.8   4:09 (355, -3)

* 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)  
Apr.  2   9 46.71  -16 25.8   3.600   4.364   135   17.7  21:04 (  0, 38)  
Apr.  9   9 42.85  -16 25.7   3.625   4.323   128   17.7  20:32 (  0, 38)

* 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)  
Apr.  2  15  2.65  -41 54.4   5.406   6.116   131   17.7   2:24 (  0, 13)  
Apr.  9  14 54.03  -42 14.3   5.367   6.150   138   17.7   1:48 (  0, 13)

* 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)  
Apr.  2   6 22.01  -16 20.3   4.986   5.018    86   17.7  19:47 ( 36, 30)  
Apr.  9   6 19.70  -15 24.6   5.046   4.973    80   17.7  19:54 ( 45, 26)

* 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)  
Apr.  2   4 50.62    0 11.9   4.538   4.159    61   17.7  19:47 ( 68, 28)  
Apr.  9   4 56.39    1  3.9   4.640   4.178    56   17.8  19:54 ( 74, 23)

* 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)  
Apr.  2  14 28.72   47 11.0   7.483   8.073   123   17.7   1:49 (180, 78)  
Apr.  9  14 23.55   47 20.3   7.533   8.120   122   17.8   1:16 (180, 78)

* 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)  
Apr.  2  22 12.09   -8 55.6   3.284   2.602    40   17.8   4:20 (284,  5)  
Apr.  9  22 23.94   -7 54.7   3.200   2.575    43   17.7   4:09 (284,  6)

* C/2019 T3 ( ATLAS )

It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in summer. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2  22 19.22   15 15.8   7.326   6.557    37   17.7   4:20 (263, 17)  
Apr.  9  22 21.36   15 17.2   7.288   6.577    41   17.8   4:09 (265, 20)

* 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)  
Apr.  2   6 12.78   32 55.6   2.404   2.454    80   17.8  19:47 ( 96, 62)  
Apr.  9   6 24.27   33  0.0   2.485   2.453    76   17.9  19:54 ( 98, 57)

* 440P/2021 W2 ( Kobayashi )

First return of a new periodic comet which brightened up to 16.5 mag in 1997. Now it is 17.2 mag (Mar. 27, Toshihiko Ikemura, 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)  
Apr.  2   8 37.74   17  1.1   1.418   2.056   115   17.9  19:56 (  0, 72)  
Apr.  9   8 44.68   15 41.5   1.482   2.059   110   18.0  19:54 ( 13, 70)

* C/2019 E3 ( ATLAS )

Now it is 17.9 mag (Feb. 18, J. L. Virlichie, P. Traverse, H. Roy). Very far object. It stays 18 mag for a long time from 2021 to 2026. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable at all. 

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  2   7 34.04  -66 10.4  10.578  10.786    99   18.0  19:47 (  6,-12)  
Apr.  9   7 31.02  -65 41.0  10.574  10.775    98   17.9  19:54 ( 10,-12)

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