Weekly Information about Bright Comets (2025 May 3: North)

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Updated on May 3, 2025
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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/2025 F2 ( SWAN )

Bright new comet discovered in the SWAN images. It brightened rapidly up to 7.8 mag on Apr. 8 (Osamu Miyazaki). Then it has been fading before the perihelion passage. Now it is 9.2 mag (Apr. 24, Virgilio Gonano). Fading rapidly. It will be fainter than 18 mag in August. Now it is not observable. It will appear soon in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   3 53.64   24 53.5   0.965   0.338    19   10.8  20:21 (119,  1)  
May  10   4 41.78   11  0.1   1.030   0.421    23   11.7  20:29 (107, -6)  

* 21P/Giacobini-Zinner

It is visible at 11 mag in the SWAN images (Jan. 27, Vladimir Bezugly). It will fade out rapidly after this. Now it is not observable. It will appear in July in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   3  4.83    6 48.8   2.124   1.149    10   11.9  20:21 (114,-20)  
May  10   3 31.82    6 51.4   2.165   1.197    12   12.3  20:29 (116,-21)  

* C/2023 A3 ( Tsuchinshan-ATLAS )

It brightened up to -3 mag due to the forward scattering on Oct. 9 in the SOHO coronagraph images (Q.-c. Zhang, Charles S. Morris). It became a great comet of 0 mag on the ground. Now it is 12.6 mag (Apr. 26, Hiroshi Abe). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in spring.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  20 12.94   24 15.0   3.489   3.626    89   12.9   3:33 (285, 63)  
May  10  20  7.19   25 22.0   3.476   3.710    95   13.0   3:24 (289, 68)  

* C/2024 G3 ( ATLAS )

It approached to Sun down to 0.09 a.u. on Jan. 13. It brightened up to -2 or -3 mag and it was detected even in the daylight. The nucleus was disintegrated on Jan. 19. However, its remnant is still visible. Fading gradually. 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)  
May   3   1 50.14  -47 54.6   2.687   2.429    64   13.0   3:33 (306,-40)  
May  10   2  2.30  -49 13.8   2.728   2.535    68   13.2   3:24 (308,-39)  

* 217P/LINEAR

It brightens up to 13 mag in early summer. But the condition in this apparition is bad. Now it is 14.0 mag (Apr. 14, B. Lutkenhoner). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in July. It stays extremely low in the Southern Hemisphere. But it will become high in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   1  0.68    0 15.9   2.042   1.258    28   13.5   3:33 (263, -9)  
May  10   1 26.54    2 20.1   2.024   1.241    29   13.4   3:24 (261, -9)  

* 29P/Schwassmann-Wachmann 1

Now it is 12.4 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). It will be getting lower gradually after this, and it will be unobservable in July 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)  
May   3   9 36.49   10 46.4   6.015   6.275   100   13.9  20:21 ( 45, 58)  
May  10   9 37.55   10 40.6   6.126   6.276    93   13.9  20:29 ( 57, 53)  

* C/2021 G2 ( ATLAS )

Now it is 13.5 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). It stays 14 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  15 23.16   -7 32.0   4.314   5.300   166   13.9   0:41 (  0, 47)  
May  10  15 20.24   -6 35.8   4.325   5.319   168   13.9   0:11 (  0, 48)  

* C/2022 N2 ( PanSTARRS )

Now it is 14.9 mag (Feb. 4, Alfons Diepvens). It stays 14 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. It locates somewhat low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   1 20.74   12 36.1   4.842   3.906    19   14.3   3:33 (250, -6)  
May  10   1 29.60   13 32.7   4.796   3.894    23   14.3   3:24 (251, -3)  

* 49P/Arend-Rigaux

Now it is 14.5 mag (Apr. 21, Hiroshi Abe). It will fade out rapidly after this. It will be fainter than 18 mag in September. It will be unobservable in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   5 26.21   20 42.9   2.078   1.453    39   14.4  20:21 (105, 16)  
May  10   5 50.11   22  2.7   2.117   1.468    38   14.5  20:29 (107, 14)  

* 48P/Johnson

Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in June. In the Southern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   0 40.73   -4 11.6   2.799   2.064    35   14.4   3:33 (270, -7)  
May  10   0 55.46   -2 58.9   2.772   2.078    38   14.4   3:24 (269, -6)  

* C/2022 E2 ( ATLAS )

It was observed at 12-13 mag for a long time in 2024. Now it is 14.5 mag (Apr. 30, Alfons Diepvens). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   1 45.97   48 26.9   4.989   4.200    34   14.5   3:33 (219, 13)  
May  10   1 48.21   48 47.5   5.016   4.230    35   14.6   3:24 (220, 15)  

* C/2022 QE78 ( ATLAS )

Now it is 14.8 mag (Apr. 24, Andrew Pearce). It stays 15 mag for a while. It will be unobservable in June. But it will be observable again in August in the Northern Hemisphere, or in September in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   6 41.26   15 39.1   6.031   5.561    57   14.9  20:21 ( 90, 28)  
May  10   6 46.29   16  3.9   6.112   5.552    52   14.9  20:29 ( 95, 22)  

* C/2024 J2 ( Wierzchos )

Brightened rapidly. Now it is 14.6 mag (Jan. 31, Thomas Lehmann). Fading slowly. 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)  
May   3   0 57.70   15 10.9   2.764   1.895    24   15.2   3:33 (252,  1)  
May  10   1 10.78   14  1.5   2.753   1.923    28   15.2   3:24 (253,  1)  

* C/2024 L5 ( ATLAS )

Now it is 14.9 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. It will be getting lower gradually after this, and it will be unobservable in July 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)  
May   3  11 57.62  -16  9.2   2.628   3.470   140   15.2  21:11 (  0, 39)  
May  10  11 44.68  -13 53.1   2.730   3.480   131   15.3  20:31 (  0, 41)  

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.4 mag (Apr. 30, Andrew Pearce). It stays 15 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)  
May   3   4  9.30  -65 30.3  15.275  15.182    82   15.2  20:21 ( 30,-37)  
May  10   4 14.37  -65 25.4  15.232  15.159    83   15.2  20:29 ( 31,-41)  

* C/2023 C2 ( ATLAS )

It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 14.9 mag (Apr. 7, Masayoshi Yoshimi). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  23  1.58   26 34.3   3.508   2.991    51   15.3   3:33 (256, 29)  
May  10  23  8.62   28 55.8   3.493   3.036    55   15.3   3:24 (255, 33)  

* 43P/Wolf-Harrington

Now it is 16.5 mag (Apr. 7, Alfons Diepvens). It stays 15 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in August in the Southern Hemisphere. But it will be observable again in August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   4 30.66   19 58.4   3.395   2.535    26   15.4  20:21 (111,  5)  
May  10   4 44.41   20 13.1   3.419   2.522    23   15.4  20:29 (115,  1)  

* 65P/Gunn

Now it is 16.4 mag (Apr. 29, ATLAS Chile). It stays 15 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)  
May   3  18 58.86  -27 29.5   2.306   2.934   119   15.5   3:33 (349, 27)  
May  10  19  0.47  -27 55.2   2.225   2.932   125   15.4   3:24 (353, 27)  

* P/2023 S1 ( PanSTARRS )

It brightened up to 14.4 mag in winter (Feb. 4, Ken-ichi Kadota). Now it is 15.4 mag (Apr. 21, Hiroshi Abe). Fading slowly. 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.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   8 58.09   13 56.8   2.443   2.651    90   15.4  20:21 ( 62, 54)  
May  10   9  5.30   13 14.4   2.537   2.658    85   15.5  20:29 ( 68, 49)  

* C/2023 T3 ( Fuls )

Now it is 15.4 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. 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)  
May   3  13  7.58  -30 51.6   2.725   3.658   153   15.5  22:22 (  0, 24)  
May  10  13  6.63  -29 44.1   2.765   3.673   149   15.6  21:53 (  0, 25)  

* C/2023 R1 ( PanSTARRS )

It is expected to brighten up to 13 mag in early summer in 2026. Now it is 16.0 mag (Apr. 26, Hiroshi Abe). Brightening slowly. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  22 35.82   21  6.3   5.163   4.705    57   15.8   3:33 (265, 32)  
May  10  22 35.05   21 41.1   5.025   4.667    63   15.7   3:24 (267, 36)  

* 496P/2024 S3 ( Hill )

First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 15.7 mag (Apr. 14, ATLAS-MLO, Mauna Loa). 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. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   7 13.67   35 15.6   1.929   1.734    63   15.7  20:21 (108, 43)  
May  10   7 37.11   34 30.2   1.999   1.764    61   15.9  20:29 (108, 41)  

* C/2024 J3 ( ATLAS )

It will brighten up to 13 mag in 2026. Now it is 16.3 mag (Apr. 29, ATLAS Chile). It stays 15 mag for a while. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  19 47.47  -21 56.6   5.748   6.130   107   15.9   3:33 (335, 29)  
May  10  19 46.14  -21 27.9   5.597   6.088   114   15.8   3:24 (340, 31)  

* C/2024 E1 ( Wierzchos )

It is expected to brighten up to 5 mag in 2026 January. Now it is 16.2 mag (Apr. 16, Ken-ichi Kadota). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in July. But it will be observable again in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  18 20.23   54 30.2   3.795   4.025    95   15.9   3:33 (182, 71)  
May  10  18 14.53   55 34.8   3.695   3.946    96   15.8   3:04 (180, 69)  

* C/2023 F3 ( ATLAS )

Now it is 16.0 mag (Apr. 30, Andrew Pearce). It stays 16 mag for a while. 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)  
May   3  11  0.04  -37 20.0   4.566   5.235   127   16.0  20:21 (  1, 18)  
May  10  10 53.42  -35 39.2   4.643   5.242   121   16.0  20:29 ( 11, 18)  

* C/2023 H5 ( Lemmon )

Now it is 15.8 mag (Apr. 4, Ken-ichi Kadota). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. 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)  
May   3  10 43.97   65 51.2   4.264   4.340    87   16.0  20:21 (176, 59)  
May  10  10 39.54   65 50.1   4.339   4.333    82   16.1  20:29 (168, 58)  

* C/2024 A1 ( ATLAS )

Now it is 16.2 mag (Apr. 11, ATLAS South Africa). It stays 16 mag for a while. It will be unobservable in June. But it will be observable again in August in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   6 40.48   10 16.1   4.321   3.892    58   16.3  20:21 ( 85, 25)  
May  10   6 44.32   11 36.2   4.415   3.887    52   16.4  20:29 ( 91, 19)  

* C/2022 R6 ( PanSTARRS )

Now it is 16.1 mag (Apr. 29, ATLAS Chile). It stays 16 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 July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   6 57.96  -15 21.5   6.874   6.611    70   16.4  20:21 ( 61, 13)  
May  10   7  1.98  -14 35.7   6.948   6.606    66   16.4  20:29 ( 66,  7)  

* C/2019 U5 ( PanSTARRS )

Now it is 16.5 mag (Apr. 6, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September. 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)  
May   3   5 27.44  -38  0.1   7.653   7.308    66   16.7  20:21 ( 55,-17)  
May  10   5 29.48  -37 29.9   7.732   7.353    64   16.7  20:29 ( 59,-23)  

* 47P/Ashbrook-Jackson

Now it is 17.2 mag (Apr. 7, E. Cortes, B. Lutkenhoner). Brightening slowly. In the Northern Hemisphere, it will be getting higher 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)  
May   3  22 32.85  -18  6.1   3.183   2.985    69   16.8   3:33 (300,  9)  
May  10  22 41.02  -17 18.0   3.084   2.972    74   16.7   3:24 (301, 12)  

* C/2023 Q1 ( PanSTARRS )

It brightened up to 13.8 mag in winter (Dec. 30, Thomas Lehmann). Now it is 16.4 mag (Apr. 4, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   8 52.55   45 49.5   3.031   3.042    81   16.7  20:21 (123, 63)  
May  10   9  1.75   43 47.7   3.146   3.080    77   16.9  20:29 (118, 58)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 16.3 mag (Apr. 23, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  22 19.91  -64 51.4   7.162   7.303    94   16.9   3:33 (336,-20)  
May  10  22 19.93  -65 43.7   7.134   7.356    98   16.9   3:24 (339,-20)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 16.9 mag (Dec. 20, ATLAS Chile). 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.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   1 19.06  -53 19.5  10.984  10.700    71   17.0   3:33 (314,-36)  
May  10   1 21.52  -53 14.0  10.938  10.710    74   17.0   3:24 (315,-34)  

* 13P/Olbers

It returned for the first time in 68 years. It brightened up to 6.2 mag in early last summer (July 1, Virgilio Gonano). Now it is 16.3 mag (Apr. 29, ATLAS Chile). 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 stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  18 41.69  -24 40.2   3.334   3.974   122   17.0   3:33 (353, 30)  
May  10  18 37.94  -25 19.4   3.309   4.040   130   17.2   3:24 (359, 30)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March in 2024 (Feb. 25, 2024, Thomas Lehmann). Now it is 17.2 mag (Apr. 8, Masayoshi Yoshimi). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  23 24.34   37 28.8   6.002   5.384    48   17.0   3:33 (243, 30)  
May  10  23 28.63   38 10.8   6.016   5.448    51   17.1   3:24 (243, 33)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 18.9 mag (Apr. 14, Jean-Claude Merlin). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  11 55.74  -58 44.7   9.486  10.129   127   17.0  21:10 (  0, -4)  
May  10  11 53.64  -58 17.2   9.545  10.172   126   17.1  20:40 (  0, -3)  

* 88P/Howell

It will brighten up to 9 mag in 2026 spring. Now it is 17.3 mag (Apr. 30, Andrew Pearce). Brightening slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and 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)  
May   3  10 17.10   15 46.8   2.640   3.102   107   17.1  20:21 ( 33, 68)  
May  10  10 17.62   15 31.0   2.700   3.063   101   17.1  20:29 ( 49, 63)  

* C/2024 G2 ( ATLAS )

Now it is 17.1 mag (Apr. 17, ATLAS South Africa). It stays 17 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)  
May   3  11 14.57  -33 35.6   4.647   5.357   130   17.1  20:29 (  0, 21)  
May  10  11 10.77  -31 42.1   4.710   5.354   125   17.2  20:29 (  7, 23)  

* 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 17.4 mag (Mar. 25, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in August. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   5 46.39  -21 11.1   7.547   7.075    58   17.2  20:21 ( 67, -4)  
May  10   5 49.50  -20 27.9   7.654   7.123    55   17.2  20:29 ( 72,-10)  

* 195P/Hill

Now it is 17.6 mag (Apr. 5, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in July in the Southern Hemisphere. But it will be observable again in July in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   6 47.06   -5 24.2   4.800   4.461    64   17.2  20:21 ( 70, 17)  
May  10   6 52.72   -5 18.6   4.874   4.458    60   17.3  20:29 ( 75, 11)  

* 362P/(457175) 2008 GO98

Now it is 17.4 mag (Sept. 20, Taras Prystavski). 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)  
May   3  21 33.66    0  8.4   3.297   3.225    77   17.3   3:33 (296, 32)  
May  10  21 39.00    0 53.1   3.220   3.240    82   17.3   3:24 (298, 35)  

* (308607) 2005 WY3

Peculiar asteroid moving along a cometary orbit. Now it is 17.5 mag (Feb. 24, Taras Prystavski). It stays 17 mag for a while. 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)  
May   3   5 58.85    1  2.9   2.333   1.872    51   17.3  20:21 ( 83, 12)  
May  10   6 16.41    1 48.7   2.351   1.853    49   17.3  20:29 ( 86,  8)  

* C/2024 X2 ( ATLAS )

Now it is 17.2 mag (Apr. 28, ATLAS Chile). It stays 18 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in July in the Southern Hemisphere. But it will be observable again in August in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   7 31.97  -32 20.7   3.678   3.720    84   17.3  20:21 ( 43,  6)  
May  10   7 35.55  -29 44.1   3.750   3.711    80   17.4  20:29 ( 50,  3)  

* 12P/Pons-Brooks

It returns for the first time in 70 years. It brightened up to 3.7 mag in early April in 2024 (Apr. 6, 2024, Jose Guilherme Aguiar). Now it is 17.9 mag (Mar. 14, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in June. 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)  
May   3  16 39.16  -51 28.5   4.083   4.869   136   17.3   1:58 (  0,  3)  
May  10  16 30.21  -51  9.2   4.093   4.933   142   17.4   1:21 (  0,  4)  

* C/2024 B1 ( Lemmon )

It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 16.9 mag (Apr. 30, ATLAS Chile). It will fade out rapidly after this. 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)  
May   3  17 37.69   11 47.7   2.335   3.063   128   17.4   2:55 (  0, 67)  
May  10  17 28.56   11  1.3   2.334   3.130   134   17.5   2:19 (  0, 66)  

* 472P/2023 RL75 ( NEAT-LINEAR )

It brightened up to 15.2 mag in winter (Dec. 30, ATLAS-MLO, Mauna Loa). Now it is 17.3 mag (Apr. 19, S. Gombos). Fading slowly. It will be fainter than 18 mag in June. It locates somewhat low.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   6 55.36   12 54.7   4.314   3.937    61   17.4  20:21 ( 85, 30)  
May  10   7  2.63   12 55.3   4.423   3.960    56   17.5  20:29 ( 89, 24)  

* C/2024 T5 ( ATLAS )

Now it is 18.0 mag (Feb. 2, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it will be getting higher gradually. It is expected to brighten up to 13 mag in winter between 2026 and 2027.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3   2 11.24  -38  0.6   7.664   7.118    54   17.4   3:33 (292,-42)  
May  10   2 17.04  -37 43.2   7.582   7.075    56   17.4   3:24 (293,-39)  

* 302P/Lemmon-PanSTARRS

Now it is 17.3 mag (Oct. 31, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher 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)  
May   3  23 41.34   -5 30.7   3.870   3.298    49   17.5   3:33 (279,  4)  
May  10  23 49.65   -4 47.0   3.798   3.301    53   17.5   3:24 (280,  6)  

* P/2010 LH155

It brightened very rapidly. Now it is 17.5 mag (Apr. 23, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag soon. 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)  
May   3  10  9.23    2 47.7   1.667   2.231   110   17.6  20:21 ( 25, 55)  
May  10  10 16.39    2 51.1   1.742   2.236   105   17.7  20:29 ( 36, 52)  

* C/2024 G6 ( ATLAS )

Now it is 17.5 mag (Apr. 26, ATLAS South Africa). 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)  
May   3  16 59.61  -23 38.3   5.868   6.730   146   17.6   2:17 (  0, 31)  
May  10  16 54.14  -22 57.7   5.792   6.716   154   17.6   1:44 (  0, 32)  

* C/2023 V1 ( Lemmon )

Now it is 17.5 mag (Apr. 28, Yasukazu Ikari). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. 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)  
May   3  18 57.13   60 35.7   5.050   5.121    88   17.7   3:33 (191, 64)  
May  10  18 44.07   61 40.3   5.016   5.116    89   17.7   3:24 (182, 63)  

* C/2024 G4 ( PanSTARRS )

Now it is 18.3 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). 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)  
May   3  17  5.26   16 12.7   4.765   5.492   132   17.8   2:22 (  0, 71)  
May  10  17  3.68   16 37.8   4.704   5.469   135   17.7   1:53 (  0, 72)  

* C/2024 N4 ( Sarneczky )

Now it is 17.9 mag (Apr. 7, Ken-ichi Kadota). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. 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)  
May   3   7 55.51   56  3.0   5.708   5.462    70   17.8  20:21 (138, 52)  
May  10   8  1.69   54 50.7   5.797   5.470    66   17.9  20:29 (135, 48)  

* C/2022 U1 ( Leonard )

Now it is 17.6 mag (Apr. 26, Yasukazu Ikari). 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)  
May   3  19 32.53   15 45.3   5.055   5.346   101   17.9   3:33 (313, 64)  
May  10  19 27.84   15 53.7   4.987   5.380   107   17.9   3:24 (324, 67)  

* (431760) 2008 HE

It approached to Sun down to 0.11 a.u. on Mar. 9. Now it is 17.9 mag (Apr. 18, ATLAS Chile). It will fade out rapidly after this. 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)  
May   3   9 46.05    5 36.9   0.694   1.357   104   19.5  20:21 ( 36, 55)  
May  10  10  9.17    4 59.0   0.861   1.469   103   20.0  20:29 ( 40, 53)  

* 105P/Singer Brewster

It became much fainter than predicted after the perihelion passage. Now it is 20.0 mag (Mar. 12, Taras Prystavski). Fading slowly. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
May   3  20 16.24   -8 24.0   1.807   2.188    97   19.6   3:33 (321, 38)  
May  10  20 22.65   -7 30.4   1.750   2.206   102   19.6   3:24 (324, 40)  

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