Weekly Information about Bright Comets (2024 Apr. 13: South)

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Updated on April 13, 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 4.1 mag (Apr. 12, Virgilio Gonano). 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. 13   2 58.26   15 27.3   1.609   0.796    23    4.7  19:02 (107, -3)  
Apr. 20   3 24.11   10 37.8   1.606   0.781    22    4.6  18:54 (104,  1)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March (Feb. 25, Thomas Lehmann). Now it is 10.7 mag (Apr. 12, Osamu Miyazaki). 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. 13  19 51.82   31 16.4   1.404   1.575    79   10.2   4:58 (200, 21)  
Apr. 20  20  3.64   36 11.5   1.454   1.631    80   10.4   5:03 (194, 17)  

* 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 10.7 mag (Apr. 11, Marco Goiato). 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. 13  14  8.65   -3 28.8   2.016   3.005   168   10.8   0:45 (180, 59)  
Apr. 20  13 51.97   -2 28.8   1.916   2.912   170   10.6   0:01 (180, 58)  

* 13P/Olbers

It returned for the first time in 68 years. It will brighten up to 7.5 mag in summer. Now it is 9.8 mag (Apr. 11, Chris Wyatt). Brightening rapidly. It stays extremely 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. 13   4  1.14   19 50.3   2.299   1.646    38   11.1  19:02 (120,  6)  
Apr. 20   4 14.63   22 26.7   2.281   1.579    35   10.7  18:54 (121,  3)  

* 479P/2023 WM26 ( Elenin )

First return of a new periodic comet which was discovered in 2011, half a year after the perihelion passage. It brightened very rapidly. Now it is 11.3 mag (Apr. 10, Chris Wyatt). It will turn to fade out rapidly after the peak. 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. 13   8  5.54   -9 19.3   0.625   1.280   101   11.2  19:02 (167, 64)  
Apr. 20   8 19.14  -11 26.5   0.623   1.261    98   11.0  18:54 (163, 66)  

* 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. It brightens up to 10 mag, but it will turn to fade out rapidly after that. It will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 13   2  4.96    8  2.5   2.137   1.161     9   12.1  19:02 ( 94, -9)  
Apr. 20   2 30.01   10 53.2   2.105   1.126     9   11.7  18:54 ( 97,-10)  

* 144P/Kushida

It brightened up to 8.9 mag from January to March (Feb. 13, Chris Wyatt). Now it is 11.5 mag (Apr. 11, Chris Wyatt). It will fade out rapidly after this. It will be fainter than 18 mag in July. 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. 13   7 43.51   16 10.6   1.288   1.655    91   12.3  19:02 (166, 38)  
Apr. 20   8  2.75   15 29.9   1.376   1.696    89   12.7  18:54 (166, 38)  

* 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. 13   6 53.36   31 10.5   3.993   3.917    78   12.6  19:02 (158, 20)  
Apr. 20   6 51.10   31 44.0   4.102   3.895    71   12.6  18:54 (154, 18)  

* 62P/Tsuchinshan 1

It brightened up to 7.4 mag from December to January (Dec. 24, Osamu Miyazaki). Now it is 12.2 mag (Apr. 9, 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. 13  12  5.26    8 46.6   0.827   1.781   153   13.1  22:37 (180, 46)  
Apr. 20  12  3.92    8  1.8   0.907   1.832   146   13.7  22:08 (180, 47)  

* C/2023 V4 ( Camarasa-Duszanowicz )

It is expected to brighten up to 12 mag in early summer. Now it is 13.0 mag (Mar. 27, 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, but it will appear in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 13   3  3.20   18 27.8   2.189   1.353    25   13.4  19:02 (110, -4)  
Apr. 20   3 14.53   22 32.5   2.164   1.295    22   13.1  18:54 (113, -8)  

* 154P/Brewington

It has not been observed yet in this apparition. Brightening gradually. In the Northern Hemisphere, it is not observable now, but it will appear in May. It stays extremely low in the Southern 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. 13   0 10.54    3 13.6   2.611   1.700    19   13.6   4:58 (265,  1)  
Apr. 20   0 27.89    5 55.3   2.564   1.670    21   13.2   5:03 (261,  2)  

* C/2022 L2 ( ATLAS )

Now it is 13.7 mag (Apr. 7, Chris Wyatt). 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. 13  11 56.51  -38  4.9   1.833   2.713   144   13.5  22:26 (  0, 87)  
Apr. 20  11 26.94  -36 36.7   1.885   2.723   138   13.6  21:29 (  0, 88)  

* 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. 13   0 13.93  -41 21.2   4.789   4.262    53   13.7   4:58 (305, 24)  
Apr. 20   0 18.36  -42  3.1   4.771   4.319    57   13.7   5:03 (303, 29)  

* C/2021 G2 ( ATLAS )

Now it is 13.7 mag (Apr. 7, Chris Wyatt). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in August. 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. 13  11 55.84  -34  1.5   4.238   5.113   147   13.7  22:28 (180, 89)  
Apr. 20  11 54.09  -32 54.5   4.241   5.101   145   13.7  21:58 (180, 88)  

* 29P/Schwassmann-Wachmann 1

Now it is 14.0 mag (Apr. 7, Chris Wyatt). 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. 13   8  5.29   21  2.1   6.011   6.193    95   13.8  19:02 (173, 34)  
Apr. 20   8  6.77   20 52.5   6.125   6.195    89   13.9  18:54 (168, 33)  

* 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. 13   2 25.79   55 52.4   2.004   1.532    48   13.9  19:02 (141,-29)  
Apr. 20   3  0.26   59 12.4   2.026   1.570    49   14.2  18:54 (145,-28)  

* 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. 13   5 17.12   29 41.0   2.377   2.026    57   14.2  19:02 (139, 11)  
Apr. 20   5 34.65   30  0.9   2.432   2.025    54   14.2  18:54 (139, 11)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 14.1 mag (Apr. 10, 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. 13   5 15.35   10 38.6   5.998   5.508    56   14.4  19:02 (126, 25)  
Apr. 20   5 18.36   11 15.9   6.152   5.567    50   14.4  18:54 (123, 22)  

* 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. 13  16 58.50  -75 50.2   2.899   3.337   107   14.5   3:35 (  0, 49)  
Apr. 20  16 59.58  -76 36.9   2.799   3.287   110   14.4   3:09 (  0, 48)  

* C/2019 U5 ( PanSTARRS )

Now it is 14.4 mag (Apr. 7, Chris Wyatt). 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. 13   7 25.82  -37 38.8   4.727   4.925    95   14.6  19:02 ( 74, 77)  
Apr. 20   7 23.29  -36 37.3   4.841   4.964    91   14.7  18:54 ( 78, 73)  

* 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. 13  10 40.89  -52 36.6   7.074   7.694   125   14.7  21:13 (  0, 72)  
Apr. 20  10 38.65  -52  5.4   7.134   7.740   123   14.8  20:43 (  0, 73)  

* 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. 13  22 46.02  -12 22.1   2.386   1.823    45   15.3   4:58 (266, 27)  
Apr. 20  23  3.05  -10 50.6   2.345   1.824    47   15.3   5:03 (263, 29)  

* 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. 13   8 48.97   27 14.6   1.105   1.661   103   15.4  19:22 (180, 28)  
Apr. 20   9  3.76   25 23.0   1.167   1.676   100   15.6  19:10 (180, 30)  

* 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. 13  16 29.51    0 28.1   0.946   1.789   133   15.4   3:05 (180, 55)  
Apr. 20  16 14.95    8 48.7   0.963   1.844   139   15.6   2:23 (180, 47)  

* 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. 13  20 12.65   -9  7.5   1.393   1.569    80   15.5   4:58 (231, 54)  
Apr. 20  20 28.60   -8  8.8   1.362   1.587    82   15.6   5:03 (224, 56)  

* 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 stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 13  22 26.67   -9  2.2   6.172   5.553    48   15.6   4:58 (260, 29)  
Apr. 20  22 31.60   -8 29.4   6.049   5.513    53   15.5   5:03 (255, 34)  

* 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. 13   2 33.97  -32 33.4   3.563   2.936    44   15.7  19:02 ( 63, 19)  
Apr. 20   2 42.88  -33 12.1   3.514   2.912    46   15.7  18:54 ( 61, 17)  

* 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. 13  17 47.84   28  6.7   6.457   6.814   106   15.7   4:22 (180, 27)  
Apr. 20  17 47.28   28 58.2   6.440   6.854   110   15.8   3:54 (180, 26)  

* 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 (Apr. 10, 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. 13   4 52.67  -48 57.9   4.624   4.444    73   15.7  19:02 ( 53, 48)  
Apr. 20   5  0.36  -47  9.7   4.695   4.489    72   15.8  18:54 ( 56, 46)  

* C/2022 QE78 ( ATLAS )

Now it is 15.8 mag (Mar. 22, Ken-ichi Kadota). 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. 13   4 48.50   -2  6.2   7.203   6.628    51   15.8  19:02 (110, 29)  
Apr. 20   4 52.56   -1 29.5   7.248   6.600    46   15.8  18:54 (108, 26)  

* 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. 13   3 14.11  -61 34.2  16.743  16.490    73   15.8  19:02 ( 35, 35)  
Apr. 20   3 17.75  -61 27.6  16.698  16.465    74   15.8  18:54 ( 35, 33)  

* C/2023 R2 ( PanSTARRS )

Now it is 16.9 mag (Mar. 23, Ken-ichi Kadota). It will brighten rapidly after this. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in June. It brightens up to 11 mag in August. But it is not observable around the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 13   3 28.90   -0 13.0   2.935   2.151    31   16.2  19:02 ( 99, 12)  
Apr. 20   3 41.10    0 35.5   2.880   2.063    29   15.9  18:54 ( 98, 10)  

* 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 14.6 mag (Mar. 27, Ken-ichi Kadota). 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. 13  10 31.84    4  2.4   0.512   1.410   134   16.0  21:05 (180, 51)  
Apr. 20  10 51.55    4 35.9   0.604   1.480   132   16.6  20:57 (180, 51)  

* 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. 13  14 11.48  -26 15.7   2.525   3.483   159   16.1   0:47 (180, 81)  
Apr. 20  14  9.31  -25 24.1   2.511   3.493   165   16.1   0:17 (180, 81)  

* 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. 13  16  9.26  -51 43.2   5.000   5.646   125   16.5   2:45 (  0, 73)  
Apr. 20  15 57.35  -52 10.3   4.902   5.626   132   16.5   2:06 (  0, 73)  

* 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. 13  16 15.67  -45 56.7   3.634   4.328   128   16.5   2:51 (  0, 79)  
Apr. 20  16  8.51  -45 17.4   3.615   4.388   135   16.5   2:17 (  0, 80)  

* 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. 13  12 51.31    4 49.8   2.562   3.536   163   16.5  23:23 (180, 50)  
Apr. 20  12 46.67    5  3.5   2.575   3.520   156   16.5  22:50 (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. 13   5 35.88  -31  2.5   1.945   1.892    71   16.7  19:02 ( 84, 54)  
Apr. 20   5 39.09  -25 31.0   2.045   1.885    66   16.8  18:54 ( 90, 48)  

* 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. 13  12 53.75  -21 28.1   1.335   2.319   165   17.0  23:25 (180, 77)  
Apr. 20  12 46.53  -21  4.2   1.303   2.278   161   16.7  22:50 (180, 76)  

* 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 16.6 mag (Mar. 14, Ken-ichi Kadota). Fading gradually. 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. 13   8 26.45    3  8.0   1.944   2.399   104   16.7  19:02 (179, 52)  
Apr. 20   8 33.59    3 34.9   2.083   2.457    99   17.0  18:54 (174, 51)  

* 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. 13  16  2.30  -29 53.3   2.341   3.158   137   16.8   2:38 (180, 85)  
Apr. 20  16  0.15  -29 45.3   2.280   3.157   145   16.8   2:08 (180, 85)  

* 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. 13  22 49.04   13 11.3   5.139   4.401    38   16.8   4:58 (245, 11)  
Apr. 20  22 49.30   14  2.5   5.103   4.443    44   16.8   5:03 (239, 16)  

* 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. 13   2 29.41  -64 14.9  10.571  10.344    74   16.8  19:02 ( 31, 31)  
Apr. 20   2 32.78  -63 52.9  10.548  10.347    75   16.8  18:54 ( 30, 29)  

* 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. 13   5  6.85  -29  0.5   7.725   7.364    65   16.9  19:02 ( 83, 47)  
Apr. 20   5 11.13  -28 17.0   7.753   7.343    62   16.9  18:54 ( 83, 44)  

* 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. 13   5 11.49   25 22.7   5.390   4.898    55   17.0  19:02 (135, 14)  
Apr. 20   5 17.80   25  0.5   5.468   4.889    50   17.0  18:54 (133, 12)  

* 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. 13   8  8.65  -37  4.6   3.254   3.628   103   17.2  19:02 ( 63, 85)  
Apr. 20   8  8.39  -35  9.0   3.406   3.713    99   17.4  18:54 ( 86, 82)  

* 362P/(457175) 2008 GO98

Now it is 18.0 mag (Mar. 13, Jean-Claude Merlin). 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. 13  15 32.63   -7 10.6   2.010   2.914   148   17.3   2:08 (180, 62)  
Apr. 20  15 30.05   -6 12.2   1.964   2.907   155   17.2   1:38 (180, 61)  

* 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. 13  12 55.69   20 36.7   2.647   3.547   149   17.2  23:26 (180, 34)  
Apr. 20  12 41.72   21 37.1   2.765   3.616   142   17.4  22:45 (180, 33)  

* C/2023 H5 ( Lemmon )

Now it is 17.0 mag (Apr. 1, Ken-ichi Kadota). It stays 17 mag for a while. 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. 13  10 16.50   13 58.0   4.936   5.605   127   17.2  20:48 (180, 41)  
Apr. 20  10 13.80   14 55.3   5.002   5.571   119   17.2  20:18 (180, 40)  

* C/2023 T3 ( Fuls )

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

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
Apr. 13   7 47.74   -6 30.9   4.153   4.379    96   17.2  19:02 (159, 60)  
Apr. 20   7 50.83   -6 12.2   4.209   4.344    90   17.2  18:54 (152, 58)  

* 150P/LONEOS

Now it is 16.7 mag (Mar. 27, Ken-ichi Kadota). Fading slowly. 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. 13   9  2.39  -15 25.0   1.091   1.772   115   17.3  19:35 (180, 70)  
Apr. 20   9 12.47  -15  6.1   1.143   1.784   112   17.4  19:18 (180, 70)  

* 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. 13   5  3.57   38 55.3   7.216   6.722    56   17.3  19:02 (143,  2)  
Apr. 20   5  9.14   38 51.6   7.306   6.726    51   17.4  18:54 (141,  0)  

* C/2024 A1 ( ATLAS )

Now it is 17.8 mag (Mar. 16, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. 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. 13   6  8.78  -44 30.3   5.330   5.301    82   17.4  19:02 ( 60, 62)  
Apr. 20   6 12.32  -42 44.3   5.337   5.263    80   17.3  18:54 ( 64, 59)  

* 89P/Russell 2

It will brighten up to 16 mag in summer. It stays 17 mag for a while. 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. 13  21 50.12  -24  8.9   2.508   2.225    62   17.5   4:58 (271, 44)  
Apr. 20  22  4.10  -23 22.5   2.445   2.229    65   17.4   5:03 (267, 48)  

* 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. 13  22 51.13   39 38.6   4.838   4.205    46   17.7   4:58 (225, -7)  
Apr. 20  22 51.10   40 22.9   4.796   4.207    49   17.6   5:03 (221, -3)  

* C/2020 F2 ( ATLAS )

Now it is 17.9 mag (Apr. 1, Ken-ichi Kadota). 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. 13  11 39.01   21 35.3   8.766   9.552   139   17.7  22:11 (180, 34)  
Apr. 20  11 35.09   21 50.7   8.858   9.568   132   17.8  21:39 (180, 33)  

* 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. 13   7 26.50   23 40.0   2.239   2.397    86   17.7  19:02 (164, 30)  
Apr. 20   7 36.45   23 43.9   2.320   2.395    81   17.8  18:54 (161, 29)  

* 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). It will fade out rapidly after this. 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. 13  16 46.83   -6 16.8   0.826   1.660   130   17.8   3:23 (180, 62)  
Apr. 20  15 58.40    1  2.8   0.825   1.751   146   18.0   2:08 (180, 54)  

* 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. 13   4 16.91  -60 21.1   4.198   4.093    77   17.9  19:02 ( 37, 43)  
Apr. 20   4 18.68  -59 33.7   4.229   4.119    76   17.9  18:54 ( 38, 41)  

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