Weekly Information about Bright Comets (2026 May 9: South)

Japanese version Home page	Updated on May 9, 2026
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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.

C/2025 R3 ( PanSTARRS ) It brightened up to 4.0 mag in late April (Apr. 30, Chris Wyatt). It brightened up to 1.3 mag due to the forward scattering in the SOHO LASCO images (Apr. 25, Mikolaj Kaszczyk). Now it is 5.4 mag (May 8, Chris Wyatt). It will fade out rapidly after this. 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 5 20.94 -6 45.2 0.764 0.673 41 6.2 18:36 ( 99, 24) May 16 5 57.27 -8 59.3 1.003 0.784 45 7.5 18:32 ( 99, 28) 88P/Howell Now it is 10.4 mag (Apr. 24, Jose J. Chambo). Fading gradually. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 0 8.08 -2 42.7 1.951 1.469 47 10.0 5:15 (252, 28) May 16 0 26.20 -0 47.9 1.950 1.499 49 10.2 5:20 (247, 30) 10P/Tempel 2 It is expected to brighten up to 8 mag in summer. Now it is 14.8 mag (Apr. 24, B. Haeusler). Brightening rapidly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 19 27.25 -8 31.2 0.965 1.667 115 12.3 4:21 (180, 63) May 16 19 40.55 -8 15.8 0.887 1.632 118 11.8 4:07 (180, 63) 78P/Gehrels 2 It will brighten up to 12 mag in summer. It stays 12 mag for a while. Now it is not observable. It will appear soon in the Southern Hemisphere, or in June in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 1 57.64 12 33.1 2.991 2.042 16 12.7 5:15 (256, -2) May 16 2 13.94 13 45.6 2.962 2.032 18 12.7 5:20 (253, 0) 141P/Machholz 2 The condition is very bad in this apparition. It is not observable at all. It will turn to fade out rapidly after the peak. It will be fainter than 18 mag in July. It will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 3 30.09 18 50.8 1.842 0.848 6 12.9 18:36 (104,-13) May 16 4 7.17 19 30.7 1.874 0.889 8 12.8 18:32 (107,-11) C/2025 A6 ( Lemmon ) It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Now it is 14.5 mag (Apr. 25, Andrew Pearce). It will fade out rapidly after this. 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 9 10 58.03 -47 39.0 2.416 3.073 121 13.2 19:49 ( 0, 77) May 16 10 52.00 -44 43.7 2.561 3.160 117 13.5 19:16 ( 0, 80) C/2024 J3 ( ATLAS ) Now it is 14.2 mag (Apr. 24, Kunihiro Shima). It stays 13 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) May 9 20 23.51 21 54.4 4.078 4.239 92 13.5 5:15 (181, 33) May 16 20 22.67 24 2.3 3.975 4.215 96 13.4 4:49 (180, 31) C/2023 R1 ( PanSTARRS ) Now it is 13.3 mag (Apr. 27, Hidenori Nohara). 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 9 18 50.49 -4 26.7 2.929 3.578 122 13.5 3:45 (180, 59) May 16 18 38.09 -4 49.5 2.826 3.582 131 13.5 3:06 (180, 60) 24P/Schaumasse It brightened up to 8.4 mag in January (Jan. 14, Mitsunori Tsumura). Now it is 13.3 mag (May 6, Toru Yusa). Fading rapidly. 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) May 9 14 31.37 0 10.2 0.918 1.901 161 13.7 23:22 (180, 55) May 16 14 25.04 -0 55.7 0.994 1.961 155 14.1 22:48 (180, 56) 29P/Schwassmann-Wachmann 1 Now it is 12.5 mag (May 8, Chris Wyatt). It will be getting lower gradually after this, and it will be unobservable 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 9 10 59.13 -0 58.6 5.776 6.314 118 13.8 19:51 (180, 56) May 16 10 59.02 -0 53.9 5.876 6.315 111 13.8 19:23 (180, 56) 235P/LINEAR It became brighter than expected. Now it is 14.3 mag (May 6, Toru Yusa). It will fade out rapidly after this. It will be fainter than 18 mag in August. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 17 13.45 -11 7.6 1.328 2.247 147 13.9 2:08 (180, 66) May 16 17 9.55 -10 20.5 1.318 2.272 154 14.1 1:37 (180, 65) C/2024 T5 ( ATLAS ) Now it is 13.9 mag (Mar. 12, ATLAS South Africa). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in August. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. It is expected to brighten up to 11 mag in next winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 3 48.00 -19 11.1 5.695 4.940 38 14.0 18:36 ( 75, 12) May 16 3 54.87 -18 20.0 5.664 4.904 37 13.9 18:32 ( 73, 8) C/2024 E1 ( Wierzchos ) It brightened up to 6.6 mag in January (Jan. 28, Chris Wyatt). The nucleus was disintegrated in March and the comet is fading and getting diffused very rapidly. Now it is 13.5 mag (Apr. 8, Ken-ichi Kadota). Fading rapidly. It will be fainter than 18 mag in August. It will be unobservable in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 5 57.82 23 57.6 2.725 2.079 41 14.6 18:36 (129, 10) May 16 6 10.00 25 7.0 2.892 2.179 37 15.0 18:32 (128, 8) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.5 mag (Apr. 25, Andrew Pearce). 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. 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 9 5 25.19 -68 43.9 13.972 14.003 89 14.7 18:36 ( 26, 41) May 16 5 31.43 -68 31.0 13.941 13.982 90 14.7 18:32 ( 27, 40) C/2022 QE78 ( ATLAS ) Now it is 14.7 mag (Apr. 22, Toru Yusa). It stays 15 mag for a while. It will be unobservable in July 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) May 9 9 11.55 31 52.5 5.786 5.749 82 14.9 18:36 (173, 23) May 16 9 15.10 31 44.6 5.905 5.765 77 15.0 18:32 (168, 22) C/2021 G2 ( ATLAS ) Now it is 15.3 mag (May 6, Toru Yusa). It stays 16 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 9 17 25.75 13 4.2 6.007 6.741 133 15.2 2:20 (180, 42) May 16 17 23.53 13 43.5 6.001 6.775 136 15.2 1:51 (180, 41) C/2022 N2 ( PanSTARRS ) Now it is 15.3 mag (Apr. 8, Ken-ichi Kadota). It stays 16 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, but it will appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 4 56.83 26 35.0 5.402 4.536 28 15.2 18:36 (122, -2) May 16 5 5.43 26 42.7 5.479 4.568 23 15.3 18:32 (120, -4) 63P/Wild 1 Now it is 15.0 mag (May 5, Toru Yusa). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in August. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 7 56.16 31 45.7 2.223 2.056 67 15.4 18:36 (156, 19) May 16 8 10.73 30 1.5 2.268 2.038 63 15.3 18:32 (154, 20) 93P/Lovas 1 Now it is 16.0 mag (Jan. 18, Kunihiro Shima). Fading slowly. Now it is not observable. It will appear in August in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 3 18.63 26 4.0 2.676 1.690 9 15.6 18:36 (109,-19) May 16 3 40.44 27 22.8 2.686 1.694 8 15.6 18:32 (110,-20) C/2024 R4 ( PanSTARRS ) Now it is 15.6 mag (May 5, ATLAS-HKO, Haleakala). It stays 15 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 9 22 14.86 34 44.7 6.473 6.125 65 15.6 5:15 (204, 15) May 16 22 14.83 36 1.0 6.358 6.089 70 15.6 5:20 (197, 16) 123P/West-Hartley It will brighten up to 15 mag from autumn to winter. Now it is 16.8 mag (Apr. 16, Erik Bryssinck). Brightening slowly. It will be unobservable soon in the Southern Hemisphere, or in June in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 5 41.53 33 11.5 3.093 2.396 39 16.1 18:36 (133, 1) May 16 5 56.89 33 18.7 3.119 2.374 35 16.0 18:32 (132, 0) C/2025 Q3 ( ATLAS ) It brightened rapidly up to 14.1 mag in early 2026 (Jan. 16, Kunihiro Shima). Now it is 16.2 mag (May 2, ATLAS Chile). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will never be observable after this. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 4 5.42 -30 19.4 2.792 2.277 49 16.2 18:36 ( 67, 21) May 16 4 19.19 -31 48.1 2.787 2.308 52 16.3 18:32 ( 64, 20) C/2024 G6 ( ATLAS ) Now it is 16.2 mag (Apr. 1, 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) May 9 16 2.20 9 58.7 5.565 6.451 149 16.4 0:57 (180, 45) May 16 15 56.41 10 56.9 5.565 6.455 149 16.4 0:24 (180, 44) 240P/NEAT It brightened up to 11.1 mag in winter (Nov. 15, Masayoshi Yoshimi). The component B also brightened rapidly up to 13.8 mag (Ded. 8, Masayoshi Yoshimi). Now it is 16.6 mag (Apr. 28, Alfons Diepvens). It will fade out rapidly after this. It will be fainter than 18 mag in July. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 6 25.75 35 48.8 2.928 2.383 48 16.4 18:36 (142, 6) May 16 6 41.72 35 54.8 3.008 2.407 45 16.7 18:32 (141, 5) 260P/McNaught It will brighten up to 13 mag and will be observable in good condition from summer to autumn. Now it is 16.9 mag (May 4, ATLAS South Africa). It will brighten rapidly after this. 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) May 9 23 14.73 -14 1.5 1.892 1.714 64 16.8 5:15 (253, 46) May 16 23 32.51 -11 35.0 1.808 1.674 65 16.4 5:20 (247, 47) C/2025 Y1 ( ATLAS ) Now it is 16.3 mag (May 5, ATLAS Chile). It stays 16 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 9 12 45.20 4 9.9 4.868 5.678 139 16.5 21:37 (180, 51) May 16 12 43.14 4 23.8 4.889 5.626 132 16.4 21:07 (180, 51) 218P/LINEAR Now it is 16.3 mag (Apr. 5, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in June. 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 9 22 36.45 -6 13.8 1.374 1.394 69 16.5 5:15 (235, 48) May 16 22 50.77 -4 50.0 1.376 1.444 72 16.7 5:20 (229, 49) C/2022 R6 ( PanSTARRS ) Now it is 16.1 mag (Apr. 23, Andrew Pearce). 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) May 9 8 36.98 1 59.6 6.828 6.786 83 16.5 18:36 (153, 50) May 16 8 39.60 2 31.9 6.948 6.798 77 16.5 18:32 (147, 47) C/2025 J1 ( Borisov ) Now it is 16.9 mag (Apr. 6, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in June. But it will be observable again in July. 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 9 5 37.43 40 8.3 4.300 3.593 40 16.7 18:36 (138, -4) May 16 5 44.02 38 44.6 4.368 3.589 35 16.8 18:32 (134, -5) 65P/Gunn Now it is 16.9 mag (Nov. 20, Thomas Lehmann). It stays 17 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) May 9 23 56.72 -8 53.7 3.827 3.315 52 17.1 5:15 (255, 34) May 16 0 4.42 -8 12.8 3.763 3.329 57 17.1 5:20 (250, 39) C/2025 E1 ( PanSTARRS ) Now it is 17.0 mag (Apr. 28, ATLAS South Africa). 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 9 8 36.09 -65 24.6 3.825 4.168 102 17.2 18:36 ( 13, 58) May 16 8 33.16 -64 42.1 3.835 4.152 101 17.2 18:32 ( 18, 57) C/2024 G4 ( PanSTARRS ) Now it is 17.2 mag (Mar. 12, ATLAS South Africa). 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 9 20 19.09 3 52.7 4.653 4.915 99 17.3 5:13 (180, 51) May 16 20 20.87 4 4.3 4.562 4.920 104 17.2 4:47 (180, 51) C/2023 X2 ( Lemmon ) Now it is 17.5 mag (Apr. 29, Alfons Diepvens). It stays 17 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 9 17 3.79 88 17.7 5.368 5.186 74 17.2 1:47 (180,-33) May 16 14 51.48 87 37.2 5.395 5.197 73 17.2 22:59 (180,-32) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 17.2 mag (Apr. 8, Alfons Diepvens). 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) May 9 23 14.40 30 14.9 6.825 6.273 53 17.2 5:15 (217, 13) May 16 23 14.81 30 34.7 6.789 6.317 58 17.3 5:20 (211, 16) C/2023 F3 ( ATLAS ) Now it is 17.0 mag (Apr. 25, Andrew Pearce). It stays 18 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 will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 9 0.72 -8 35.5 6.098 6.218 92 17.4 18:36 (157, 62) May 16 8 59.92 -7 45.3 6.243 6.246 85 17.4 18:32 (146, 59) P/2021 N1 ( ZTF ) First return of a new periodic comet which brightened up to 17 mag in 2021. It will approach to Earth down to 0.17 a.u. from June to July. It is expected to brighten up to 14 mag. Brightening rapidly. 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) May 9 18 15.33 -48 43.3 0.577 1.449 129 17.9 3:10 ( 0, 76) May 16 18 40.75 -50 12.6 0.494 1.386 131 17.4 3:07 ( 0, 75) C/2019 E3 ( ATLAS ) Very far object. 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 stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 0 38.02 -42 24.7 11.712 11.377 68 17.4 5:15 (299, 41) May 16 0 39.62 -42 21.7 11.650 11.392 72 17.4 5:20 (297, 46) C/2025 M2 ( PanSTARRS ) It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 17.1 mag (May 2, ATLAS Chile). Brightening 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) May 9 21 3.77 -16 33.7 5.809 5.974 94 17.6 5:15 (210, 69) May 16 21 1.58 -16 39.2 5.632 5.922 101 17.5 5:20 (186, 71) C/2026 A2 ( Bok ) It will brighten up to 14 mag from autumn to winter. Now it is 17.4 mag (May 7, ATLAS-MLO, Mauna Loa). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 18 32.17 66 46.5 3.163 3.279 87 17.7 3:25 (180,-12) May 16 18 31.89 68 58.5 3.123 3.219 86 17.6 2:57 (180,-14) C/2023 H5 ( Lemmon ) Now it is 17.5 mag (Apr. 14, Alfons Diepvens). It stays 18 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 9 22 11.50 64 25.8 5.319 5.013 67 17.6 5:15 (192,-12) May 16 22 14.34 64 56.0 5.329 5.041 68 17.6 5:20 (189,-11) 40P/Vaisala 1 It became brighter than expected, brightened up to 14.3 mag (Jan. 21, Michael Jager). Now it is 17.0 mag (Apr. 26, ATLAS Chile). Fading gradually. 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 9 17 59.36 -9 2.8 1.671 2.500 136 17.6 2:54 (180, 64) May 16 17 55.94 -9 1.7 1.659 2.542 143 17.7 2:23 (180, 64) A/2026 E1 Now it is 17.3 mag (Apr. 16, B. Lutkenhoner, E. Cortes). Fading slowly. 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 9 11 16.00 -18 4.0 2.189 2.903 126 17.6 20:07 (180, 73) May 16 11 12.65 -14 4.4 2.281 2.902 118 17.7 19:37 (180, 69) C/2025 V2 ( Rankin ) It is expected to brighten up to 12.5 mag in 2027 spring. Now it is 17.2 mag (Apr. 28, Alfons Diepvens). Brightening slowly. 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) May 9 9 5.59 23 14.2 4.050 4.071 84 17.6 18:36 (170, 31) May 16 9 8.75 23 21.3 4.097 4.010 77 17.6 18:32 (164, 30) 195P/Hill Now it is 17.1 mag (May 3, ATLAS Chile). It stays 18 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 9 9 26.35 -25 50.9 4.284 4.611 102 17.6 18:36 (156, 80) May 16 9 29.90 -25 9.3 4.370 4.620 97 17.7 18:32 (138, 77) C/2024 A1 ( ATLAS ) Now it is 17.4 mag (Apr. 29, Alfons Diepvens). 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 9 6 34.66 63 36.7 5.242 4.796 58 17.6 18:36 (160,-15) May 16 6 41.76 63 43.0 5.336 4.830 55 17.7 18:32 (159,-17) C/2024 G2 ( ATLAS ) Now it is 17.5 mag (Apr. 23, L. Grazzini). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 10 52.46 10 40.5 5.413 5.871 112 17.9 19:44 (180, 44) May 16 10 50.43 11 26.2 5.552 5.892 104 17.9 19:15 (180, 44) C/2026 C1 ( Tsuchinshan ) It is expected to brighten up to 4 mag in 2028 autumn. Now it is 17.0 mag (May 5, Yasukazu Ikari). It stays 18 mag for a while. It will be getting lower gradually after this, and it will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. At the high light, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes observable after the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 12 15.23 7 50.0 8.636 9.339 131 17.9 21:07 (180, 47) May 16 12 12.85 7 51.4 8.675 9.286 124 17.9 20:37 (180, 47) C/2025 T1 ( ATLAS ) It brightened up to 9.0 mag from late November to early December (Nov. 22, Thomas Lehmann). Now it is 17.8 mag (Apr. 25, J. L. Virlichie, P. Traverse, H. Roy). It will fade out rapidly after this. It will be fainter than 18 mag soon. 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 9 22 42.77 -37 12.2 2.501 2.558 81 17.9 5:15 (285, 61) May 16 22 43.83 -40 8.7 2.457 2.638 88 18.1 5:20 (291, 68) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. It stays 18 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 9 20 12.29 -70 4.0 9.556 9.952 110 17.9 5:08 ( 0, 55) May 16 20 7.28 -70 37.8 9.536 10.000 114 17.9 4:36 ( 0, 54) (248590) 2006 CS It seems to be a parent of the beta-Tucanids meteor shower. Now it is 17.7 mag (Apr. 12, Guy Wells). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 16 22.49 80 13.0 0.846 1.224 82 18.4 1:15 (180,-25) May 16 16 6.43 78 3.4 0.936 1.289 82 18.6 0:32 (180,-23) C/2025 L1 ( ATLAS ) It was expected to brighten up to 13.5 mag. But actually, the nucleus was disintegrated and it is getting diffuse and fading very rapidly. Now it is 17.0 mag (Apr. 15, Thomas Lehmann). 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 9 12 17.85 52 56.6 1.824 2.252 101 19.3 21:08 (180, 2) May 16 12 1.83 53 22.1 1.991 2.310 94 19.6 20:25 (180, 2) 489P/Denning It had been lost for 113 years. It must have passed the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 12 43.71 -5 33.7 1.356 2.253 144 22.3 21:35 (180, 61) May 16 12 43.57 -5 45.7 1.452 2.301 137 22.5 21:08 (180, 61) C/2026 A1 ( MAPS ) Kreutz sungrazer comet discovered furthest from Sun in history. It approached to Sun down to 0.005 a.u. on Apr. 4. It brightened up to 7.7 mag until it set down under the horizon before the perihelion passage (Mar. 29, Chris Wyatt). It brightened up to about -1 mag in the SOHO spacecraft images (Apr. 4, Robert Pickard). However, the comet has disappeared at the perihelion passage. It is appearing in the evening sky again in calculation, however, probably nothing remained. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 9 5 19.31 1 28.0 1.788 1.157 37 33.4 18:36 (106, 19) May 16 5 38.39 1 13.8 1.982 1.310 36 35.2 18:32 (105, 18)