Weekly Information about Bright Comets (2024 Apr. 6: South)

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Updated on April 8, 2024
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere.
Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

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* 12P/Pons-Brooks

It returns for the first time in 70 years. It brightened about 1 mag in outburst on Apr. 3. Now it is 3.8 mag (Apr. 5, Yoshimi Nagai). It will turn to fade out rapidly after the peak. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it is not observable now, but it will be observable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   2 30.43   20  1.4   1.610   0.832    25    4.9  19:11 (109, -7)  
Apr. 13   2 58.26   15 27.3   1.609   0.796    23    4.7  19:02 (107, -3)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March (Feb. 25, Thomas Lehmann). Now it is 9.8 mag (Apr. 3, Marek Biely). It will fade out rapidly after this. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in May.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  19 38.53   25 54.2   1.362   1.522    78   10.0   4:52 (207, 24)  
Apr. 13  19 51.82   31 16.4   1.404   1.575    79   10.2   4:58 (200, 21)  

* C/2023 A3 ( Tsuchinshan-ATLAS )

It will approach to Sun down to 0.4 a.u. in late September, and it is expected to brighten up to 0 mag. Now it is 11.3 mag (Apr. 2, Stephane Garro). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in July. In the Southern Hemisphere, it stays observable in good condition. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  14 23.34   -4 23.8   2.140   3.096   159   11.1   1:27 (180, 60)  
Apr. 13  14  8.65   -3 28.8   2.016   3.005   168   10.8   0:45 (180, 59)  

* 13P/Olbers

It returned for the first time in 68 years. It will brighten up to 7.5 mag in summer. Now it is 10.4 mag (Apr. 2, Osamu Miyazaki). It will brighten rapidly after this. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable soon. At the high light, it locates low in the Northern Hemisphere, or it is not observable in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   3 48.97   17 14.5   2.312   1.714    42   11.5  19:11 (119,  9)  
Apr. 13   4  1.14   19 50.3   2.299   1.646    38   11.1  19:02 (120,  6)  

* 144P/Kushida

It brightened up to 8.9 mag from January to March (Feb. 13, Chris Wyatt). Now it is 11.4 mag (Apr. 2, Osamu Miyazaki). It will fade out rapidly after this. It will be fainter than 18 mag in July. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   7 23.65   16 44.1   1.205   1.616    93   11.8  19:11 (166, 37)  
Apr. 13   7 43.55   16 10.5   1.288   1.655    91   12.3  19:02 (166, 38)  

* 46P/Wirtanen

The condition is bad in this apparition. It brightens up to 10 mag in early summer, however, it is not observable at all. Brightening gradually. It will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   1 41.12    5 11.7   2.173   1.202    10   12.6  19:11 ( 90, -9)  
Apr. 13   2  4.96    8  2.5   2.137   1.161     9   12.1  19:02 ( 94, -9)  

* 62P/Tsuchinshan 1

It brightened up to 7.4 mag from December to January (Dec. 24, Osamu Miyazaki). Now it is 12.6 mag (Apr. 1, Osamu Miyazaki). Fading rapidly. It will be fainter than 18 mag in June. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  12  8.13    9 24.1   0.757   1.730   159   12.5  23:07 (180, 46)  
Apr. 13  12  5.26    8 46.6   0.827   1.781   153   13.1  22:37 (180, 46)  

* C/2022 E2 ( ATLAS )

Now it is 12.5 mag (Apr. 2, Osamu Miyazaki). It stays 13 mag for a while. It will be unobservable in June. But it will be observable again in July in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   6 56.66   30 34.0   3.880   3.939    85   12.6  19:11 (163, 22)  
Apr. 13   6 53.36   31 10.5   3.993   3.917    78   12.6  19:02 (158, 20)  

* C/2023 V4 ( Camarasa-Duszanowicz )

It is expected to brighten up to 12 mag in early summer. Now it is 13.4 mag (Mar. 22, Ken-ichi Kadota). Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   2 52.98   14 27.4   2.208   1.416    28   13.7  19:11 (108,  0)  
Apr. 13   3  3.20   18 27.7   2.189   1.353    25   13.4  19:02 (110, -4)  

* C/2022 L2 ( ATLAS )

Now it is 13.7 mag (Mar. 18, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  12 29.11  -38 54.0   1.812   2.705   146   13.5  23:26 (  0, 86)  
Apr. 13  11 56.51  -38  5.0   1.833   2.713   144   13.5  22:26 (  0, 87)  

* 473P/2023 W1 ( NEAT )

First return of a new periodic comet which brightened up to 10 mag in 2001. It brightened up to 12.5 mag from February to March (Feb. 29, Thomas Lehmann). Now it is 13.6 mag (Mar. 14, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in June. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   1 56.97   52 10.5   1.986   1.499    47   13.6  19:11 (136,-29)  
Apr. 13   2 25.79   55 52.4   2.004   1.532    48   13.9  19:02 (141,-29)  

* 154P/Brewington

It has not been observed yet in this apparition. Brightening gradually. Now it is not observable. It will appear soon in the Southern Hemisphere, or in May in the Northern Hemisphere. It brightens up to 11.5 mag in early summer. But it locates very low around the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  23 53.59    0 35.1   2.659   1.732    17   14.1   4:52 (270, -1)  
Apr. 13   0 10.54    3 13.6   2.611   1.700    19   13.6   4:58 (265,  1)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 13.1 mag (Mar. 5, Chris Wyatt). It stays 14 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   0  9.29  -40 47.2   4.797   4.204    48   13.6   4:52 (307, 19)  
Apr. 13   0 13.89  -41 22.0   4.788   4.261    53   13.7   4:58 (305, 24)  

* C/2021 G2 ( ATLAS )

Now it is 13.8 mag (Mar. 18, Ken-ichi Kadota). It stays 14 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  11 58.00  -35  3.9   4.249   5.125   147   13.7  22:57 (  0, 90)  
Apr. 13  11 55.84  -34  1.5   4.238   5.113   147   13.7  22:28 (180, 89)  

* 29P/Schwassmann-Wachmann 1

Now it is 12.8 mag (Mar. 9, Toshihiko Ikemura, Hirohisa Sato). It will be getting lower gradually after this, and it will be unobservable in June in the Northern Hemisphere, or in July in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   8  4.32   21 10.4   5.899   6.192   102   13.8  19:11 (178, 34)  
Apr. 13   8  5.29   21  2.1   6.011   6.193    95   13.8  19:02 (173, 34)  

* 479P/2023 WM26 ( Elenin )

First return of a new periodic comet which was discovered in 2011, half a year after the perihelion passage. Now it is 14.5 mag (Mar. 10, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   7 54.87   -7 16.8   0.627   1.305   104   14.1  19:11 (172, 62)  
Apr. 13   8  5.54   -9 19.4   0.625   1.280   101   14.1  19:02 (167, 64)  

* 32P/Comas Sola

Now it is 14.1 mag (Mar. 12, Chris Wyatt). Fading slowly. It will be unobservable in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   5  0.13   29 14.0   2.320   2.029    60   14.1  19:11 (139, 12)  
Apr. 13   5 17.17   29 41.1   2.376   2.026    57   14.2  19:02 (139, 11)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 13.8 mag (Mar. 12, Chris Wyatt). It stays 15 mag for a while. It will be unobservable in May in the Northern Hemisphere, or in June in the Southern Hemisphere. But it will be observable again in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   5 12.67    9 58.6   5.838   5.448    62   14.3  19:11 (128, 28)  
Apr. 13   5 15.35   10 38.6   5.998   5.508    56   14.4  19:02 (126, 25)  

* C/2019 U5 ( PanSTARRS )

Now it is 14.3 mag (Mar. 15, ATLAS Chile). Fading slowly. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   7 29.45  -38 44.4   4.616   4.885    99   14.5  19:11 ( 63, 81)  
Apr. 13   7 25.82  -37 38.8   4.727   4.925    95   14.6  19:02 ( 74, 77)  

* C/2023 C2 ( ATLAS )

It is expected to brighten up to 12.5 mag in summer. Now it is 15.2 mag (Mar. 16, Thomas Lehmann). Brightening slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Around the high light, it is observable in good condition in the Southern Hemisphere, but it locates very low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  16 54.34  -74 57.8   3.002   3.387   104   14.7   3:59 (  0, 50)  
Apr. 13  16 58.50  -75 50.2   2.899   3.337   107   14.5   3:35 (  0, 49)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 13.7 mag (Mar. 7, Thomas Lehmann). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  10 43.73  -53  4.6   7.022   7.649   125   14.7  21:43 (  0, 72)  
Apr. 13  10 40.89  -52 36.6   7.074   7.694   125   14.7  21:13 (  0, 72)  

* 227P/Catalina-LINEAR

It brightened up to 14.5 mag from February to March (Mar. 11, W. Pei). Now it is 15.4 mag (Mar. 23, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in June. In the Northern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   8 34.58   29  1.8   1.048   1.648   107   15.2  19:36 (180, 26)  
Apr. 13   8 48.97   27 14.6   1.105   1.661   103   15.4  19:22 (180, 28)  

* 130P/McNaught-Hughes

Now it is 15.2 mag (Mar. 18, E. Cortes). It stays 15 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  22 28.69  -13 51.6   2.429   1.825    42   15.4   4:52 (270, 24)  
Apr. 13  22 46.07  -12 21.8   2.387   1.823    45   15.3   4:58 (266, 27)  

* C/2024 C4 ( ATLAS )

Now it is 15.3 mag (Mar. 17, J. E. Rogers, B. Haeusler, D. Parrott). It will fade out rapidly after this. It will be fainter than 18 mag in June. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  16 42.19   -8  4.0   0.963   1.742   124   15.3   3:45 (180, 63)  
Apr. 13  16 29.67    0 25.8   0.951   1.794   133   15.4   3:05 (180, 55)  

* 207P/NEAT

It approached to Earth down to 0.2 a.u. and it brightened up to 13.1 mag in March (Mar. 13, W. Pei). Vladimir Bezugly reported it was visible at around 12 mag in the SWAN images in late January. Now it is 15.8 mag (Mar. 19, ATLAS-HKO, Haleakala). Fading rapidly. It will be fainter than 18 mag in May. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  10  7.52    2 56.9   0.429   1.342   135   15.4  21:09 (180, 52)  
Apr. 13  10 31.85    4  2.4   0.512   1.410   134   16.0  21:05 (180, 51)  

* 125P/Spacewatch

Now it is 16.1 mag (Mar. 14, ATLAS Chile). Fading gradually. It will be fainter than 18 mag in July. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  19 55.61  -10  5.7   1.424   1.555    77   15.5   4:52 (236, 52)  
Apr. 13  20 12.65   -9  7.5   1.393   1.569    80   15.5   4:58 (231, 54)  

* C/2022 N2 ( PanSTARRS )

It is expected to brighten up to 11.5 mag in 2025 autumn, and it will be observable in good condition. Brightening slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  22 21.55   -9 35.6   6.289   5.594    42   15.7   4:52 (265, 24)  
Apr. 13  22 26.67   -9  2.2   6.172   5.553    48   15.6   4:58 (260, 29)  

* C/2020 K1 ( PanSTARRS )

It brightened up to 12.1 mag in 2023 spring (May 20, 2023, Jose Guilherme de S. Aguiar). Now it is 15.1 mag (Mar. 12, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   4 45.01  -50 53.6   4.555   4.400    74   15.7  19:11 ( 51, 50)  
Apr. 13   4 52.67  -48 57.9   4.624   4.444    73   15.7  19:02 ( 53, 48)  

* C/2019 T4 ( ATLAS )

It brightened up to 11.1 mag in early 2022 (Mar. 31, 2022, F. Kugel, J.-G. Bosch, J. Nicolas). Now it is 15.6 mag (Mar. 15, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  17 47.88   27 13.0   6.480   6.774   102   15.7   4:50 (180, 28)  
Apr. 13  17 47.84   28  6.7   6.457   6.814   106   15.7   4:22 (180, 27)  

* C/2022 S4 ( Lemmon )

Now it is 16.1 mag (Feb. 22, ATLAS Chile). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. The brightness evolution is slower than originally expected.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   2 25.70  -32  2.1   3.605   2.961    43   15.8  19:11 ( 65, 20)  
Apr. 13   2 33.97  -32 33.4   3.563   2.936    44   15.7  19:02 ( 63, 19)  

* C/2022 QE78 ( ATLAS )

Now it is 15.6 mag (Mar. 10, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a while. It will be unobservable in May in the Northern Hemisphere, or in June in the Southern Hemisphere. But it will be observable again in June in the Southern Hemisphere, or in August in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   4 44.74   -2 44.6   7.151   6.655    56   15.8  19:11 (112, 32)  
Apr. 13   4 48.50   -2  6.2   7.203   6.628    51   15.8  19:02 (110, 29)  

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.3 mag (Mar. 4, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now. In the Northern Hemisphere, it is not observable until 2030.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   3 10.64  -61 42.9  16.785  16.514    72   15.8  19:11 ( 35, 37)  
Apr. 13   3 14.11  -61 34.2  16.743  16.490    73   15.8  19:02 ( 35, 35)  

* C/2022 T1 ( Lemmon )

Now it is 16.9 mag (Mar. 17, ATLAS Chile). Fading slowly. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  14 13.36  -27  1.0   2.552   3.474   153   16.1   1:17 (180, 82)  
Apr. 13  14 11.48  -26 15.7   2.525   3.483   159   16.1   0:47 (180, 81)  

* C/2021 Y1 ( ATLAS )

It brightened up to 13 mag in early 2023. Fading slowly. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  16 22.03  -46 28.4   3.664   4.268   121   16.5   3:25 (  0, 78)  
Apr. 13  16 15.67  -45 56.7   3.634   4.328   128   16.5   2:51 (  0, 79)  

* 103P/Hartley 2

It approached to Earth down to 0.38 a.u., and brightened up to 8.0 mag in last autumn (Sept. 29, Virgilio Gonano). Now it is 16.1 mag (Mar. 10, Toshihiko Ikemura, Hirohisa Sato). It will fade out rapidly after this. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   8 19.85    2 32.5   1.809   2.340   109   16.5  19:20 (180, 52)  
Apr. 13   8 26.45    3  8.0   1.944   2.399   104   16.7  19:02 (179, 52)  

* C/2023 F3 ( ATLAS )

Now it is 17.1 mag (Mar. 19, ATLAS Chile). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in July. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  16 19.77  -51  8.4   5.110   5.667   119   16.6   3:23 (  0, 74)  
Apr. 13  16  9.26  -51 43.2   5.000   5.646   125   16.5   2:45 (  0, 73)  

* 65P/Gunn

Now it is 16.5 mag (Mar. 18, ATLAS Chile). It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  12 56.15    4 31.2   2.564   3.551   169   16.5  23:55 (180, 51)  
Apr. 13  12 51.31    4 49.8   2.562   3.536   163   16.5  23:23 (180, 50)  

* C/2024 A2 ( ATLAS )

Now it is 16.9 mag (Mar. 15, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in July. It will be unobservable in May in the Northern Hemisphere, or in June in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   5 33.53  -37 15.8   1.858   1.902    77   16.6  19:11 ( 75, 58)  
Apr. 13   5 35.88  -31  2.6   1.945   1.892    71   16.7  19:02 ( 84, 54)  

* C/2021 X1 ( Maury-Attard )

It brightened up to 14 mag in early 2023 and 2023 autumn. Now it is 16.4 mag (Jan. 15, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. It will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  22 48.38   12 20.9   5.164   4.360    33   16.8   4:52 (251,  5)  
Apr. 13  22 49.04   13 11.3   5.139   4.401    38   16.8   4:58 (245, 11)  

* 299P/Catalina-PanSTARRS

Now it is 16.6 mag (Mar. 9, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  16  3.39  -29 55.8   2.410   3.159   131   16.9   3:06 (180, 85)  
Apr. 13  16  2.30  -29 53.3   2.341   3.158   137   16.8   2:38 (180, 85)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 17.1 mag (Feb. 28, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   2 26.14  -64 40.9  10.591  10.341    72   16.8  19:11 ( 31, 33)  
Apr. 13   2 29.41  -64 14.9  10.571  10.344    74   16.8  19:02 ( 31, 31)  

* C/2022 R6 ( PanSTARRS )

Now it is 16.7 mag (Mar. 16, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after June.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   5  2.88  -29 46.5   7.693   7.384    68   17.0  19:11 ( 84, 50)  
Apr. 13   5  6.85  -29  0.5   7.725   7.363    65   16.9  19:02 ( 83, 47)  

* C/2021 T4 ( Lemmon )

It brightened up to 7.8 mag in late July in 2023 (July 20, 2023, Thomas Lehmann). Now it is 16.5 mag (Mar. 18, ATLAS Chile). It will fade out rapidly after this. It will be fainter than 18 mag in May. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  13 10.80   19 17.2   2.550   3.478   154   17.0   0:15 (180, 36)  
Apr. 13  12 55.69   20 36.7   2.647   3.547   149   17.2  23:26 (180, 34)  

* C/2023 P1 ( Nishimura )

It approached to Sun down to 0.23 a.u. and brightened up to 2.5 mag in mid September in 2023 (Sept. 18, 2023, Juan Jose Gonzalez). Now it is 16.6 mag (Mar. 15, Thomas Lehmann). Fading gradually. It will be fainter than 18 mag in May. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   8 10.26  -39 11.5   3.109   3.543   107   17.0  19:11 (  3, 86)  
Apr. 13   8  8.65  -37  4.6   3.254   3.628   103   17.2  19:02 ( 63, 85)  

* 37P/Forbes

It will brighten up to 14 mag from summer to autumn. Now it is 18.2 mag (Mar. 17, ATLAS Chile). Brightening gradually. It stays observable in good condition. Around the high light, it is observable in good condition in the Southern Hemisphere. But it locates extremely low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  13  0.94  -21 42.6   1.379   2.359   164   17.2   0:04 (180, 77)  
Apr. 13  12 53.75  -21 28.1   1.335   2.319   165   17.0  23:25 (180, 77)  

* C/2022 U3 ( Bok )

Now it is 17.2 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. It will be unobservable in May. But it will be observable again in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   5  5.51   25 45.5   5.307   4.907    61   17.0  19:11 (138, 15)  
Apr. 13   5 11.49   25 22.7   5.390   4.898    55   17.0  19:02 (135, 14)  

* 150P/LONEOS

Now it is 16.5 mag (Mar. 15, Yukihiro Sugiyama). Fading gradually. It will be fainter than 18 mag in May. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   8 53.75  -15 45.8   1.044   1.762   119   17.1  19:54 (180, 71)  
Apr. 13   9  2.39  -15 24.7   1.092   1.772   115   17.3  19:35 (180, 70)  

* C/2023 H5 ( Lemmon )

Now it is 17.2 mag (Mar. 18, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  10 19.75   12 56.0   4.880   5.640   135   17.2  21:19 (180, 42)  
Apr. 13  10 16.50   13 58.0   4.936   5.605   127   17.2  20:48 (180, 41)  

* C/2023 T3 ( Fuls )

Now it is 17.1 mag (Mar. 19, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   7 45.35   -6 51.8   4.098   4.415   101   17.2  19:11 (167, 61)  
Apr. 13   7 47.74   -6 30.9   4.153   4.379    96   17.2  19:02 (159, 60)  

* 362P/(457175) 2008 GO98

It stays 17 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  15 34.29   -8  7.3   2.068   2.920   141   17.4   2:37 (180, 63)  
Apr. 13  15 32.63   -7 10.6   2.010   2.914   148   17.3   2:08 (180, 62)  

* C/2021 S4 ( Tsuchinshan )

Now it is 17.0 mag (Mar. 2, ATLAS-HKO, Haleakala). It stays 17 mag for a while. It will be unobservable soon in the Southern Hemisphere, or in June in the Northern Hemisphere. But it will be observable again in July in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   4 58.31   38 59.8   7.121   6.717    62   17.3  19:11 (145,  4)  
Apr. 13   5  3.57   38 55.3   7.216   6.722    56   17.3  19:02 (143,  2)  

* C/2024 A1 ( ATLAS )

Now it is 17.8 mag (Mar. 16, ATLAS South Africa). It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it stays observable in good condition. It stays 15 mag for a long time from late 2024 to early 2026.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   6  5.85  -46 19.4   5.326   5.339    85   17.4  19:11 ( 55, 64)  
Apr. 13   6  8.78  -44 30.3   5.330   5.301    82   17.4  19:02 ( 60, 62)  

* 89P/Russell 2

It will brighten up to 16 mag in summer. Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  21 35.63  -24 54.8   2.570   2.223    58   17.6   4:52 (274, 41)  
Apr. 13  21 50.12  -24  8.9   2.508   2.225    62   17.5   4:58 (271, 44)  

* C/2022 U1 ( Leonard )

Now it is 17.7 mag (Jan. 9, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will be observable soon.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  22 50.62   38 58.7   4.869   4.203    43   17.7   4:52 (230,-11)  
Apr. 13  22 51.13   39 38.6   4.838   4.205    46   17.7   4:58 (225, -7)  

* C/2023 S3 ( Lemmon )

It must have brightened up to 11 mag in winter. However, it was too low to observe at the high light. Now it is 16.6 mag (Mar. 19, ATLAS South Africa). Fading rapidly. It will be fainter than 18 mag soon. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  17 31.18  -12 59.1   0.878   1.569   113   17.7   4:35 (180, 68)  
Apr. 13  16 46.83   -6 16.9   0.826   1.660   130   17.8   3:23 (180, 62)  

* 478P/2023 Y3 ( ATLAS )

Now it is 17.4 mag (Mar. 6, A. Diepvens). Fading slowly. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   7 17.36   23 30.3   2.158   2.400    91   17.7  19:11 (166, 30)  
Apr. 13   7 26.51   23 39.9   2.239   2.397    86   17.7  19:02 (164, 30)  

* C/2020 F2 ( ATLAS )

Now it is 17.4 mag (Mar. 6, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6  11 43.17   21 16.6   8.687   9.537   146   17.7  22:42 (180, 34)  
Apr. 13  11 39.01   21 35.3   8.766   9.552   139   17.7  22:11 (180, 34)  

* C/2022 A3 ( Lemmon-ATLAS )

Now it is 17.9 mag (Mar. 16, ATLAS South Africa). It stays 18 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting lower gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr.  6   4 16.10  -61 17.6   4.164   4.068    77   17.8  19:11 ( 36, 45)  
Apr. 13   4 16.90  -60 21.0   4.198   4.093    77   17.9  19:02 ( 37, 43)  

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