Weekly Information about Bright Comets (2024 June 8: North)

Japanese version
Home page
Updated on June 11, 2024
Last week South Next week

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

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

* 12P/Pons-Brooks

It returns for the first time in 70 years. It brightened up to 3.7 mag in early April (Apr. 6, Jose Guilherme Aguiar). Now it is 6.7 mag (June 1, Marco Goiato). Fading rapidly. In the Northern Hemisphere, it is not observable now. It locates somewhat low in the Southern Hemisphere. But it will become high in winter.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   6 14.30  -23 12.2   1.549   1.170    49    6.9  20:58 ( 84,-35)  
June 15   6 42.98  -27 30.5   1.564   1.259    53    7.3  21:02 ( 80,-38)  

* 13P/Olbers

It returned for the first time in 68 years. Now it is 7.3 mag (June 2, Virgilio Gonano). It will fade out rapidly after this. It stays extremely low in the Northern Hemisphere. 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)  
June  8   6 41.29   39 13.6   2.049   1.223    26    7.3  20:58 (133,  8)  
June 15   7 12.48   40 48.4   2.010   1.198    27    7.2  21:02 (134,  9)  

* 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 10.2 mag (June 6, Virgilio Gonano). It will brighten rapidly after this. 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. But it will be observable again in September in the Southern Hemisphere. 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. It is fainter than this ephemeris recently.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  11 48.69    2 53.9   1.832   2.227    98    9.3  20:58 ( 53, 45)  
June 15  11 36.72    3  1.9   1.875   2.123    89    9.1  21:02 ( 63, 37)  

* 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 will fade out rapidly after this. It will never be observable after this.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   5 58.00   25 27.5   2.058   1.089    12   10.3  20:58 (129, -8)  
June 15   6 30.02   26  4.0   2.082   1.115    12   10.4  21:02 (129, -8)  

* C/2023 V4 ( Camarasa-Duszanowicz )

It brightened very rapidly. Now it is 10.8 mag (June 4, Carlos Labordena). It will fade out rapidly after this. It locates somewhat low in the Northern Hemisphere. 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)  
June  8   5 41.92   52 16.2   1.885   1.130    30   11.2  20:58 (150, 10)  
June 15   6 24.34   55 41.7   1.848   1.150    33   11.3  21:02 (151, 13)  

* 154P/Brewington

Now it is 12.9 mag (June 7, Ken-ichi Kadota). It will fade out rapidly after this. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   2 44.47   24 27.7   2.317   1.554    32   11.4   3:00 (245,  7)  
June 15   3  6.52   26 43.6   2.295   1.553    33   11.4   2:58 (243,  9)  

* 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 12.1 mag (May 30, Thomas Lehmann). It will fade out rapidly after this. It will be fainter than 18 mag in September. 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)  
June  8  11 13.10  -26 12.1   0.672   1.325   101   11.7  20:58 ( 39, 16)  
June 15  11 46.11  -27 30.4   0.703   1.360   103   12.1  21:02 ( 38, 16)  

* C/2021 S3 ( PanSTARRS )

It brightened up to 9.6 mag from February to March (Feb. 25, Thomas Lehmann). Now it is 12.2 mag (June 5, Osamu Miyazaki). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  20 34.47   58 34.8   1.872   2.096    87   12.1   3:00 (189, 66)  
June 15  20 30.15   60 12.6   1.930   2.168    89   12.3   2:56 (180, 65)  

* C/2022 E2 ( ATLAS )

Now it is 12.8 mag (May 31, Hiroshi Abe). It stays 12 mag for a while. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in July. In the Southern Hemisphere, it is not observable now.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   6 56.52   35  6.6   4.645   3.770    27   12.7  20:58 (128,  8)  
June 15   6 59.29   35 36.1   4.677   3.756    22   12.7  21:02 (132,  3)  

* C/2023 C2 ( ATLAS )

It is expected to brighten up to 12.5 mag in summer. Now it is 14.0 mag (May 29, Chris Wyatt). It stays 13 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in August. 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)  
June  8  15 42.81  -76  0.3   2.246   2.957   125   13.5  22:35 (  0,-21)  
June 15  15 32.89  -74 36.7   2.195   2.913   126   13.4  21:57 (  0,-20)  

* C/2023 R2 ( PanSTARRS )

Brightening gradually. Now it is not observable. It will appear in September in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this. 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)  
June  8   5 38.01    5 21.0   2.360   1.440    19   13.9  20:58 (118,-26)  
June 15   6  0.40    5 47.5   2.278   1.355    18   13.6  21:02 (120,-27)  

* C/2021 G2 ( ATLAS )

Now it is 13.7 mag (May 31, Hiroshi Abe). 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)  
June  8  11 57.64  -24 54.2   4.585   5.034   110   13.8  20:58 ( 32, 23)  
June 15  12  0.51  -23 57.6   4.669   5.026   104   13.9  21:02 ( 38, 20)  

* C/2020 V2 ( ZTF )

It was observed at 9-10 mag for a long time in 2023. Now it is 13.3 mag (May 20, Thomas Lehmann). Fading slowly. 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)  
June  8   0 39.49  -50 35.9   4.541   4.718    93   14.0   3:00 (322,-14)  
June 15   0 40.01  -52 19.9   4.512   4.775    98   14.1   2:58 (326,-13)  

* 29P/Schwassmann-Wachmann 1

Now it is 15.2 mag (May 17, ATLAS-MLO, Mauna Loa). It will be unobservable in July. But it will be observable again in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   8 28.91   19  8.5   6.848   6.207    47   14.1  20:58 (103, 15)  
June 15   8 33.30   18 48.8   6.928   6.209    41   14.2  21:02 (106, 10)  

* C/2022 L2 ( ATLAS )

Now it is 14.1 mag (June 3, Thomas Lehmann). Fading slowly. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after August.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   9 50.75  -24 50.6   2.764   2.844    84   14.5  20:58 ( 55,  5)  
June 15   9 47.37  -23 58.0   2.911   2.868    77   14.6  21:02 ( 61, -1)  

* 130P/McNaught-Hughes

Now it is 14.5 mag (June 7, Ken-ichi Kadota). It stays 15 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)  
June  8   0 51.35   -0 31.6   2.052   1.881    65   14.6   3:00 (281, 15)  
June 15   1  5.00    0 44.5   2.009   1.897    68   14.6   2:58 (282, 18)  

* 144P/Kushida

It brightened up to 8.9 mag from January to March (Feb. 13, Chris Wyatt). Now it is 13.2 mag (June 3, Thomas Lehmann). Fading rapidly. It will be fainter than 18 mag in August. It locates somewhat low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   9 59.39    8 36.7   2.099   2.023    71   14.6  20:58 ( 80, 28)  
June 15  10 13.86    7 26.9   2.213   2.072    68   15.0  21:02 ( 82, 24)  

* 32P/Comas Sola

Now it is 14.7 mag (May 31, Hiroshi Abe). Fading slowly. It will be unobservable in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   7 43.04   28 29.5   2.806   2.071    35   14.7  20:58 (117, 12)  
June 15   8  1.09   27 43.9   2.857   2.085    33   14.7  21:02 (118,  9)  

* P/2024 FG9 ( Nanshan-Hahn )

Alan Hale reported its cometary appearance. Now it is 14.6 mag (June 2, Taras Prystavski). Fading gradually. It will be unobservable in July 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)  
June  8   8 20.58   18 13.1   2.140   1.607    45   14.8  20:58 (103, 13)  
June 15   8 41.23   16 58.9   2.181   1.616    44   14.9  21:02 (103, 10)  

* C/2017 K2 ( PanSTARRS )

It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 14.5 mag (Apr. 27, Hiroshi Abe). It stays 15 mag for a while. Now it is not observable. It will appear in July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   5 44.73   14 33.2   6.966   5.979    12   15.0  20:58 (124,-18)  
June 15   5 48.78   14 53.5   7.038   6.037     9   15.0  21:02 (129,-23)  

* 192P/Shoemaker-Levy 1

Now it is 16.6 mag (May 30, Hidetaka Sato). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will be observable soon. It stays extremely low in the Southern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   2 50.69    6 17.9   2.165   1.476    36   15.3   3:00 (258, -5)  
June 15   3  9.71    8 51.9   2.162   1.489    37   15.1   2:58 (257, -2)  

* 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. In the Southern Hemisphere, it stays observable in good condition. The brightness evolution is slower than originally expected.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   4  7.01  -42  4.4   3.043   2.794    66   15.2   3:00 (297,-44)  
June 15   4 23.24  -44  2.8   2.976   2.784    69   15.1   2:58 (301,-42)  

* 299P/Catalina-PanSTARRS

It brightened very rapidly in outburst in late May. Now it is 15.1 mag (May 28, ATLAS Chile). 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)  
June  8  15 30.90  -26 27.3   2.197   3.163   158   15.2  22:22 (  0, 29)  
June 15  15 27.69  -25 49.2   2.237   3.165   151   15.3  21:51 (  0, 29)  

* C/2019 L3 ( ATLAS )

It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 16.3 mag (May 23, ATLAS South Africa). It stays 16 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)  
June  8  10 40.23  -48 12.4   7.767   8.055   102   15.2  20:58 ( 32, -5)  
June 15  10 42.63  -47 45.6   7.879   8.100    98   15.3  21:02 ( 35, -8)  

* 37P/Forbes

It will brighten up to 14 mag from summer to autumn. Now it is 16.3 mag (June 5, Hirohisa Sato). Brightening slowly. It locates somewhat low in the Northern Hemisphere. 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 extremely low in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  12 27.78  -17 31.9   1.352   2.007   115   15.4  20:58 ( 28, 32)  
June 15  12 31.81  -17 24.1   1.382   1.971   109   15.3  21:02 ( 35, 30)  

* C/2019 U5 ( PanSTARRS )

Now it is 14.8 mag (May 19, ATLAS Chile). It stays 16 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 July.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   7 26.19  -32 12.6   5.604   5.249    64   15.3  20:58 ( 67,-25)  
June 15   7 28.39  -32  1.1   5.695   5.290    61   15.4  21:02 ( 70,-31)  

* 146P/Shoemaker-LINEAR

It will brighten up to 14.5 mag in summer. Now it is 16.5 mag (May 30, ATLAS South Africa). It stays 15 mag for a while. 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)  
June  8   1 13.78  -16 18.0   1.620   1.570    68   15.9   3:00 (291,  1)  
June 15   1 34.82  -14  9.2   1.565   1.538    69   15.6   2:58 (290,  3)  

* C/2022 QE78 ( ATLAS )

Now it is 15.9 mag (Mar. 26, ATLAS Chile). It stays 15 mag for a while. Now it is not observable. It will appear soon 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)  
June  8   5 26.70    1 49.8   7.347   6.414    21   15.6  20:58 (117,-30)  
June 15   5 32.06    2  9.2   7.325   6.389    21   15.6   2:58 (238,-34)  

* C/2022 N2 ( PanSTARRS )

It is expected to brighten up to 13 mag in 2025 autumn, and it will be observable in good condition. Now it is 15.9 mag (May 24, Ken-ichi Kadota). Brightening slowly. It stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  22 58.12   -5 13.6   5.073   5.237    93   15.7   3:00 (306, 33)  
June 15  23  0.39   -4 53.2   4.930   5.198    99   15.6   2:58 (311, 37)  

* C/2014 UN271 ( Bernardinelli-Bernstein )

Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.0 mag (May 3, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   3 45.72  -61 47.9  16.333  16.295    86   15.7   3:00 (325,-42)  
June 15   3 49.74  -62  0.6  16.278  16.271    87   15.7   2:58 (325,-39)  

* 30P/Reinmuth 1

Now it is 16.3 mag (Mar. 29, Ken-ichi Kadota). It stays 16 mag for a while. Now it is not observable. It will appear in September in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   5 50.99   21 15.5   2.909   1.921    10   16.0  20:58 (127,-12)  
June 15   6  9.50   21 32.3   2.900   1.901     8   15.9  21:02 (130,-14)  

* 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 15.9 mag (May 26, Ken-ichi Kadota). It stays 17 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)  
June  8  17 31.92   32 55.9   6.520   7.136   123   16.0   0:26 (  0, 88)  
June 15  17 28.90   33  6.2   6.564   7.176   123   16.1  23:52 (  0, 88)  

* C/2023 F3 ( ATLAS )

Now it is 16.5 mag (June 6, Giuseppe Pappa). 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)  
June  8  14 20.08  -50  3.9   4.700   5.496   137   16.3  21:11 (  0,  5)  
June 15  14  8.73  -49  5.6   4.742   5.479   132   16.3  21:02 (  5,  6)  

* 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 15.4 mag (May 30, Thomas Lehmann). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   5 52.38  -38 15.3   5.202   4.811    62   16.3  20:58 ( 69,-45)  
June 15   5 59.26  -37 30.6   5.267   4.858    61   16.4  21:02 ( 71,-50)  

* 62P/Tsuchinshan 1

It brightened up to 7.4 mag from December to January (Dec. 24, Osamu Miyazaki). Now it is 16.3 mag (May 29, Ken-ichi Kadota). Fading rapidly. 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)  
June  8  12 28.10    1  4.0   1.652   2.197   108   16.4  20:58 ( 39, 49)  
June 15  12 34.73   -0  2.0   1.778   2.249   103   16.9  21:02 ( 46, 45)  

* 89P/Russell 2

It will brighten up to 16 mag in summer. Now it is 16.8 mag (May 29, ATLAS South Africa). It stays 17 mag for a while. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  23 24.25  -18 52.7   1.995   2.286    93   16.7   3:00 (310, 19)  
June 15  23 32.56  -18 30.8   1.932   2.298    97   16.6   2:58 (314, 22)  

* 65P/Gunn

Now it is 16.4 mag (May 26, ATLAS South Africa). 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 September. In the Southern Hemisphere, it stays observable in good condition.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  12 32.60    3 52.5   2.954   3.414   108   16.7  20:58 ( 40, 52)  
June 15  12 33.98    3 19.7   3.033   3.399   102   16.7  21:02 ( 49, 47)  

* C/2019 E3 ( ATLAS )

Very far object. Now it is 17.1 mag (Apr. 2, 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)  
June  8   2 55.24  -63 15.1  10.325  10.371    89   16.7   3:00 (327,-36)  
June 15   2 57.67  -63 26.2  10.290  10.376    92   16.7   2:58 (328,-34)  

* 227P/Catalina-LINEAR

It brightened up to 14.5 mag from February to March (Mar. 11, W. Pei). Now it is 16.7 mag (June 3, ATLAS-HKO, Haleakala). 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)  
June  8  10 47.64   11 23.2   1.697   1.847    81   16.7  20:58 ( 74, 39)  
June 15  11  1.89    9 23.0   1.786   1.878    78   16.9  21:02 ( 76, 35)  

* P/2003 T12 ( SOHO )

It was observed at three apparitions in 2003, 2012 and 2016. It has not been observed yet in this apparition. It will brighten up to 15.5 mag in July. It brightens up to 15.5 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in July. It will be unobservable soon 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)  
June  8   2  8.60   15 57.9   1.113   0.769    42   17.9   3:00 (257,  9)  
June 15   2 58.23   17 55.9   1.150   0.695    36   16.8   2:58 (252,  5)  

* C/2021 X1 ( Maury-Attard )

It brightened up to 14 mag in early 2023 and 2023 autumn. Now it is 16.7 mag (May 25, ATLAS-MLO, Mauna Loa). 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)  
June  8  22 34.72   19 55.3   4.654   4.746    88   16.9   3:00 (285, 54)  
June 15  22 29.59   20 38.4   4.581   4.790    95   16.9   2:58 (291, 60)  

* 125P/Spacewatch

Now it is 16.3 mag (May 24, ATLAS-MLO, Mauna Loa). 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)  
June  8  21 44.28   -3 17.6   1.147   1.772   109   16.9   3:00 (324, 45)  
June 15  21 48.96   -3 11.7   1.119   1.805   115   17.2   2:58 (331, 48)  

* 362P/(457175) 2008 GO98

Now it is 16.4 mag (May 4, Toshiyuki Takahashi). 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)  
June  8  15  3.89   -1  9.1   1.995   2.875   143   16.9  21:55 (  0, 54)  
June 15  15  1.84   -0 57.6   2.046   2.872   136   16.9  21:25 (  0, 54)  

* C/2023 T3 ( Fuls )

Now it is 16.8 mag (May 18, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in August. But it will be observable again in September.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   8 28.75   -5 33.8   4.572   4.113    57   17.1  20:58 ( 82,  1)  
June 15   8 36.00   -5 44.1   4.612   4.082    53   17.1  21:02 ( 85, -4)  

* C/2024 A1 ( ATLAS )

Now it is 17.1 mag (May 27, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn. 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)  
June  8   6 47.75  -32 35.6   5.422   5.002    60   17.2  20:58 ( 71,-33)  
June 15   6 53.67  -31 31.5   5.429   4.966    58   17.1  21:02 ( 75,-37)  

* C/2023 H5 ( Lemmon )

Now it is 17.0 mag (May 29, A. Diepvens). It stays 17 mag for a while. It will be getting lower gradually after this, and it will be unobservable in August. But it will be observable again in September in the Northern Hemisphere.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  10 11.63   19 23.4   5.585   5.337    70   17.1  20:58 ( 89, 36)  
June 15  10 13.56   19 45.7   5.664   5.305    64   17.1  21:02 ( 94, 30)  

* 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 14.9 mag (May 28, Thomas Lehmann). Fading rapidly. It will be fainter than 18 mag soon. 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)  
June  8   8 30.86   60 14.0   2.375   1.916    51   17.2  20:58 (144, 33)  
June 15   9  3.96   57 34.2   2.454   1.973    50   17.6  21:02 (140, 32)  

* C/2022 T1 ( Lemmon )

Now it is 16.9 mag (May 28, ATLAS Chile). Fading slowly. It will be fainter than 18 mag 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)  
June  8  14  1.20  -18 39.9   2.786   3.596   136   17.2  20:58 (  1, 36)  
June 15  14  2.46  -17 54.7   2.872   3.614   130   17.3  21:02 ( 11, 36)  

* C/2024 G3 ( ATLAS )

It approaches to Sun down to 0.09 a.u. on Jan. 13, 2025. According to the calculation, it will brighten up to -1 mag. But probably, it will be disintegrated. At the high light, it may be observable after the perihelion passage only in the Southern Hemisphere. Now it is 17.2 mag (May 31, ATLAS South Africa). Brightening gradually. 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)  
June  8  13 55.13  -77 59.5   3.296   3.912   120   17.5  20:58 (  1,-23)  
June 15  13 29.27  -76 13.5   3.225   3.826   119   17.4  21:02 (  4,-22)  

* C/2022 U1 ( Leonard )

Now it is 17.4 mag (June 6, ATLAS-HKO, Haleakala). It stays 18 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)  
June  8  22 26.40   46 38.5   4.307   4.248    79   17.5   3:00 (235, 61)  
June 15  22 17.80   47 27.9   4.225   4.257    84   17.4   2:58 (229, 67)  

* C/2023 Q2 ( PanSTARRS )

Now it is 19.2 mag (June 4, Yasukazu Ikari). Fading slowly. 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)  
June  8  18 53.93   -6 11.7   2.300   3.213   148   17.9   1:49 (  0, 49)  
June 15  18 40.93   -8 27.7   2.245   3.210   158   17.8   1:09 (  0, 47)  

* C/2024 J3 ( ATLAS )

Now it is 17.7 mag (June 3, ATLAS Chile). It stays 18 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it stays observable in good condition. It is expected to brighten up to 13 mag in 2026, and it will be observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it locates very low at the high light.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8  19 15.10  -42 59.1   7.277   8.143   146   17.9   2:10 (  0, 12)  
June 15  19 10.85  -42 55.0   7.188   8.099   152   17.9   1:38 (  0, 12)  

* 328P/LONEOS-Tucker

It has not been observed yet in this apparition. It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually.

Date(TT)  R.A. (2000) Decl.   Delta     r    Elong.  m1   Best Time(A, h)  
June  8   0 55.90    8  2.9   2.198   1.930    61   18.1   3:00 (273, 19)  
June 15   1  9.61   10 26.1   2.128   1.916    64   17.9   2:58 (273, 23)  

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

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