Weekly Information about Bright Comets (2025 Aug. 9: South)

Japanese version Home page	Updated on August 11, 2025
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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 K1 ( ATLAS ) It is expected to brighten up to 7.5 mag in October. Now it is 12.4 mag (Aug. 5, Osamu Miyazaki). Brightening rapidly. It will be getting lower gradually after this, and it will be unobservable in September in the Northern Hemisphere, or in October in the Southern Hemisphere. But it will be observable again in October in the Northern Hemisphere. It is not observable for a month around the perihelion passage. But in the Northern Hemisphere, it stays observable in good condition until mid September and after late October. In the Southern Hemisphere, it is observable only before the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 18 21.22 18 55.4 0.588 1.433 124 12.1 21:03 (180, 37) Aug. 16 17 3.70 11 31.6 0.585 1.307 106 11.7 19:20 (180, 44) C/2024 E1 ( Wierzchos ) It is expected to brighten up to 5 mag in 2026 January. Now it is 13.8 mag (July 24, Osamu Miyazaki). It will brighten rapidly after this. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 15 58.81 46 14.7 2.736 2.848 85 13.7 18:50 (179, 9) Aug. 16 15 55.76 43 32.5 2.690 2.758 83 13.6 18:54 (173, 11) C/2022 N2 ( PanSTARRS ) Now it is 13.9 mag (Aug. 5, Osamu Miyazaki). It stays 14 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) Aug. 9 3 12.10 23 28.7 3.790 3.826 84 13.7 5:21 (191, 31) Aug. 16 3 17.62 23 59.9 3.696 3.828 89 13.7 5:14 (187, 31) 240P/NEAT Now it is brighter than originally expected. Now it is 14.0 mag (Aug. 5, Thomas Lehmann). Brightening slowly. It stays observable in good condition. It is expected to brighten up to 12 mag and to be observable in good condition from autumn to winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 3 28.22 -2 43.3 2.174 2.360 87 13.9 5:21 (206, 55) Aug. 16 3 37.13 -2 18.8 2.079 2.338 91 13.8 5:14 (201, 56) C/2021 G2 ( ATLAS ) Now it is 13.1 mag (July 30, Osamu Miyazaki). It stays 14 mag for a while. It will be getting lower gradually after this, and it will be unobservable in October in the Southern Hemisphere, or in November in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 15 9.80 -0 36.6 5.523 5.596 88 13.9 18:50 (158, 54) Aug. 16 15 12.27 -0 36.0 5.652 5.620 83 14.0 18:54 (147, 51) 29P/Schwassmann-Wachmann 1 Now it is not observable. It will appear in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 10 22.06 6 24.0 7.240 6.290 18 14.3 18:50 ( 98, 1) Aug. 16 10 26.77 5 54.0 7.270 6.291 13 14.3 18:54 ( 94, -5) C/2023 R1 ( PanSTARRS ) It is expected to brighten up to 13 mag in early summer in 2026. Now it is 14.8 mag (July 31, Andrew Pearce). It stays 14 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in December. But it will be observable again in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 20 56.32 23 33.6 3.375 4.205 140 14.4 23:42 (180, 31) Aug. 16 20 42.71 22 26.8 3.337 4.173 140 14.3 23:01 (180, 33) 217P/LINEAR Now it is 13.8 mag (Aug. 2, Andrew Pearce). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. 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) Aug. 9 6 33.72 16 6.1 2.206 1.551 38 14.6 5:21 (239, 13) Aug. 16 6 51.86 16 0.6 2.223 1.602 40 14.8 5:14 (239, 14) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 14.8 mag (Aug. 5, Thomas Lehmann). It stays 15 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 September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 1 12.66 56 37.5 4.515 4.667 92 14.9 4:04 (180, -2) Aug. 16 1 0.98 56 56.7 4.453 4.704 98 14.9 3:25 (180, -2) 3I/2025 N1 ( ATLAS ) Third interstellar object in history following 1I/'Oumuamua and 2I/Borisov. The eccentricity is extremely big as 6. It approaches to Sun down to 1.38 a.u. in late October. It is not observable around the perihelion passage. But it is expected to be observable at 12 mag before and after that time. Now it is 16.6 mag (Aug. 1, Michael Jager). It will brighten rapidly after this. It will be getting lower gradually after this, and it will be unobservable in October. But it will be observable again in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 16 29.59 -16 52.6 2.715 3.234 111 15.3 19:17 (180, 72) Aug. 16 16 10.55 -16 13.1 2.654 3.010 100 14.9 18:54 (163, 70) C/2022 QE78 ( ATLAS ) Now it is 14.6 mag (May 10, Alfons Diepvens). It stays 15 mag for a while. Now it is not observable. It will appear soon 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) Aug. 9 8 8.73 18 33.2 6.449 5.482 16 14.9 5:21 (252, -6) Aug. 16 8 15.34 18 35.6 6.411 5.480 21 14.9 5:14 (250, -4) C/2025 A6 ( Lemmon ) Brightening rapidly. It is expected to brighten up to 6 mag from October to November. Now it is 14.5 mag (Aug. 1, Ddac Mesa Romeu). Brightening rapidly. In the Northern Hemisphere, it will be unobservable in November. But it will be observable again in August. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 7 25.71 29 9.4 2.672 1.844 28 15.5 5:21 (237, -5) Aug. 16 7 34.46 29 49.2 2.492 1.738 33 15.0 5:14 (235, -3) C/2024 J3 ( ATLAS ) It will brighten up to 13 mag in 2026. Now it is 15.1 mag (July 18, Ken-ichi Kadota). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 18 48.14 -14 46.4 4.699 5.557 144 15.0 21:36 (180, 70) Aug. 16 18 43.81 -14 15.9 4.733 5.517 136 15.0 21:04 (180, 69) 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 (July 29, 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) Aug. 9 5 22.12 -67 59.1 14.761 14.862 93 15.1 5:21 (337, 49) Aug. 16 5 26.28 -68 25.4 14.739 14.839 93 15.1 5:14 (339, 50) 43P/Wolf-Harrington Now it is 16.5 mag (Apr. 7, Alfons Diepvens). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it will be unobservable soon. But it will be observable again in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 7 51.39 16 6.6 3.371 2.444 20 15.1 5:21 (251, -1) Aug. 16 8 5.19 15 13.0 3.342 2.445 23 15.1 5:14 (251, 0) 65P/Gunn Now it is 14.5 mag (July 6, Thomas Lehmann). Fading 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) Aug. 9 18 15.60 -32 27.0 2.120 2.938 136 15.3 21:04 (180, 87) Aug. 16 18 14.95 -32 24.0 2.190 2.941 129 15.4 20:36 (180, 87) C/2023 C2 ( ATLAS ) It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 15.3 mag (Aug. 4, Thomas Lehmann). Fading slowly. 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) Aug. 9 23 30.17 55 18.8 3.320 3.687 103 15.4 2:21 (180, 0) Aug. 16 23 23.85 56 28.1 3.324 3.740 106 15.5 1:47 (180, -2) 60P/Tsuchinshan 2 The condition is bad. It is hardly observable in this apparition. Fading slowly. Now it is not observable. It will appear in October in the Northern Hemisphere, or in November in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 9 10.84 14 32.1 2.670 1.657 1 15.9 5:21 (264,-16) Aug. 16 9 30.35 12 54.3 2.676 1.666 2 15.9 5:14 (265,-15) 47P/Ashbrook-Jackson Now it is 15.7 mag (July 25, Masayoshi Yoshimi). 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) Aug. 9 23 21.65 -11 38.3 1.928 2.845 149 16.0 2:13 (180, 66) Aug. 16 23 17.96 -11 37.1 1.882 2.839 156 15.9 1:42 (180, 66) C/2024 T5 ( ATLAS ) Now it is 15.9 mag (Aug. 3, ATLAS South Africa). It stays 16 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. It is expected to brighten up to 12 mag in winter between 2026 and 2027. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 3 18.52 -40 1.6 6.269 6.515 99 16.2 5:21 (301, 79) Aug. 16 3 20.85 -40 37.6 6.171 6.472 102 16.1 5:14 (316, 82) 48P/Johnson Now it is 15.3 mag (July 25, Masayoshi Yoshimi). Fading slowly. It will be fainter than 18 mag in November. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 3 32.17 5 52.6 2.222 2.349 84 16.2 5:21 (203, 47) Aug. 16 3 39.92 5 55.1 2.167 2.375 88 16.3 5:14 (198, 47) C/2024 J2 ( Wierzchos ) It brightened rapidly up to 14.6 mag in winter (Jan. 31, Thomas Lehmann). Now it is 15.8 mag (Aug. 2, Thomas Lehmann). Fading gradually. It will be fainter than 18 mag in November. 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) Aug. 9 3 12.78 -13 59.2 2.227 2.516 94 16.2 5:21 (207, 67) Aug. 16 3 16.91 -17 31.5 2.198 2.573 99 16.3 5:14 (200, 71) C/2023 A3 ( Tsuchinshan-ATLAS ) It brightened up to -3 mag due to the forward scattering in the SOHO coronagraph images (Oct. 9, 2024, Q.-c. Zhang, Charles S. Morris). It became a great comet of 0 mag on the ground. Now it is 16.1 mag (Aug. 5, Thomas Lehmann). Fading gradually. It will be fainter than 18 mag in October. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 18 11.43 24 38.1 4.154 4.737 119 16.2 20:59 (180, 30) Aug. 16 18 6.14 23 33.4 4.289 4.811 115 16.4 20:26 (180, 32) C/2025 L1 ( ATLAS ) It is expected to brighten up to 13.5 mag and to be observable in good condition in 2026 spring. Now it is 17.5 mag (Aug. 5, ATLAS Chile). Brightening 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 December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 6 47.56 -70 59.1 2.387 2.602 90 16.5 5:21 (337, 41) Aug. 16 7 47.86 -72 21.0 2.360 2.539 88 16.4 5:14 (338, 38) C/2023 H5 ( Lemmon ) Now it is 16.3 mag (Aug. 5, 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) Aug. 9 11 48.71 63 16.0 4.839 4.325 54 16.5 18:50 (155,-20) Aug. 16 12 1.08 63 10.5 4.830 4.330 55 16.5 18:54 (153,-22) 302P/Lemmon-PanSTARRS It brightened very rapidly, and it became brighter than expected. Now it is 16.7 mag (Aug. 3, 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) Aug. 9 0 55.02 -0 54.7 2.689 3.360 123 16.5 3:46 (180, 56) Aug. 16 0 55.06 -1 12.1 2.620 3.367 130 16.5 3:18 (180, 56) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. It is fading very slowly. Now it is 16.2 mag (Aug. 4, Thomas Lehmann). 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) Aug. 9 20 7.93 -74 34.6 7.465 8.029 120 16.6 22:56 ( 0, 51) Aug. 16 19 52.34 -74 22.5 7.561 8.080 117 16.6 22:13 ( 0, 51) C/2023 H1 ( PanSTARRS ) Now it is 15.9 mag (July 22, Michael Jager). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 19 53.14 -16 41.1 3.928 4.894 160 16.6 22:41 (180, 72) Aug. 16 19 50.54 -16 27.6 3.993 4.918 153 16.7 22:11 (180, 71) C/2023 T3 ( Fuls ) Now it is 16.1 mag (July 14, Taras Prystavski). Fading slowly. It will be unobservable in October in the Northern Hemisphere, or in November in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 13 54.71 -20 51.7 4.051 3.963 77 16.7 18:50 (108, 59) Aug. 16 14 1.87 -20 45.6 4.174 3.991 72 16.8 18:54 (103, 54) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (July 13, Taras Prystavski). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in October. In the Southern Hemisphere, it will be unobservable in September. But it will be observable again in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 10 42.60 -22 38.5 6.061 5.380 44 16.7 18:50 ( 76, 21) Aug. 16 10 44.63 -22 22.7 6.138 5.394 39 16.8 18:54 ( 73, 15) 78P/Gehrels 2 It will brighten up to 12 mag in 2026 summer. Now it is 17.1 mag (Aug. 4, Thomas Lehmann). Brightening slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 20 9.11 -10 46.6 2.113 3.097 163 16.9 22:56 (180, 66) Aug. 16 20 3.90 -11 10.2 2.111 3.064 156 16.8 22:24 (180, 66) C/2024 G6 ( ATLAS ) Now it is 17.0 mag (July 25, Ken-ichi Kadota). It stays 17 mag for a while. It will be getting lower gradually after this, and it will be unobservable in October in the Southern Hemisphere, or in November in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 15 51.54 -13 46.5 6.274 6.565 102 16.8 18:50 (173, 69) Aug. 16 15 49.97 -13 17.6 6.387 6.556 95 16.9 18:54 (153, 66) 88P/Howell It will brighten up to 9 mag in 2026 spring. Now it is 17.7 mag (July 24, Thomas Lehmann). It will brighten rapidly after this. It will be unobservable soon 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) Aug. 9 11 37.07 5 18.7 3.260 2.517 36 16.9 18:50 (109, 16) Aug. 16 11 47.04 4 6.9 3.267 2.472 32 16.8 18:54 (104, 13) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.6 mag (July 17, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in November. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 1 22.43 -56 20.5 10.326 10.850 118 16.9 4:13 ( 0, 69) Aug. 16 1 19.07 -56 41.5 10.309 10.861 120 16.9 3:42 ( 0, 68) C/2023 U1 ( Fuls ) It continues brightening even after the perihelion passage. Now it is 17.3 mag (Aug. 3, 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) Aug. 9 3 16.78 -59 35.0 5.150 5.476 103 17.1 5:21 (346, 64) Aug. 16 3 10.74 -61 7.9 5.136 5.498 105 17.1 5:14 (355, 64) 210P/Christensen It is expected to brighten up to 8 mag from late autumn to early winter. Now it is 18.7 mag (Aug. 3, Francois Kugel). Brightening rapidly. It will be unobservable in October in the Northern Hemisphere, or in November in the Southern Hemisphere. But it will be observable again in November in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 21 17.39 -31 23.4 0.841 1.838 164 17.6 0:10 (180, 86) Aug. 16 20 59.77 -33 51.3 0.773 1.753 157 17.1 23:18 (180, 89) C/2019 U5 ( PanSTARRS ) Now it is 16.7 mag (Aug. 4, Thomas Lehmann). 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 stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 5 59.78 -38 19.4 8.206 7.933 70 17.2 5:21 (291, 48) Aug. 16 6 0.90 -38 53.7 8.204 7.978 73 17.2 5:14 (290, 52) 261P/Larson Now it is 17.6 mag (Aug. 5, Jean-Gabriel Bosch). 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) Aug. 9 19 53.66 -18 10.7 1.303 2.284 160 17.4 22:41 (180, 73) Aug. 16 19 48.87 -18 2.1 1.312 2.260 152 17.2 22:09 (180, 73) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 16.1 mag (Apr. 7, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 6 12.26 27 2.3 9.979 9.273 43 17.3 5:21 (228, 9) Aug. 16 6 14.29 27 12.2 9.942 9.323 49 17.3 5:14 (225, 11) C/2023 X2 ( Lemmon ) Now it is 17.5 mag (Mar. 22, S. Shurpakov). 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) Aug. 9 6 12.07 64 55.9 5.670 5.201 57 17.4 5:21 (202,-19) Aug. 16 6 23.94 66 8.2 5.594 5.190 61 17.3 5:14 (200,-19) C/2024 R4 ( PanSTARRS ) Brightening rapidly. It is expected to brighten up to 13 mag from 2027 to 2028. Now it is 17.3 mag (Aug. 1, Michael Jager). 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) Aug. 9 22 23.09 23 47.4 6.863 7.635 136 17.4 1:14 (180, 31) Aug. 16 22 18.32 23 59.8 6.780 7.595 141 17.4 0:42 (180, 31) 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 17.4 mag (July 21, ATLAS-MLO, Mauna Loa). 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) Aug. 9 23 32.39 44 51.5 5.808 6.254 111 17.4 2:23 (180, 10) Aug. 16 23 28.56 44 52.0 5.797 6.314 116 17.4 1:52 (180, 10) 351P/Wiegert-PanSTARRS Now it is brighter than expected. Now it is 17.8 mag (July 29, Giuseppe Pappa). Fading slowly. It will be fainter than 18 mag in September. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 19 48.47 -14 54.6 2.244 3.212 159 17.4 22:36 (180, 70) Aug. 16 19 44.75 -14 47.2 2.292 3.220 151 17.5 22:05 (180, 70) 486P/2024 H1 ( Leonard ) Now it is 17.3 mag (Aug. 3, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in October. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 0 44.60 7 13.0 1.756 2.462 123 17.5 3:35 (180, 48) Aug. 16 0 45.17 7 16.8 1.705 2.478 129 17.5 3:08 (180, 48) C/2024 N3 ( Sarneczky ) Now it is 17.3 mag (July 30, ATLAS-MLO, Mauna Loa). 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) Aug. 9 16 26.71 61 6.9 5.096 5.098 84 17.5 19:14 (180, -6) Aug. 16 16 25.04 59 2.9 5.120 5.108 83 17.6 18:54 (179, -4) C/2024 G4 ( PanSTARRS ) Now it is 17.9 mag (July 31, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 16 42.33 12 58.2 4.817 5.199 106 17.6 19:30 (180, 42) Aug. 16 16 43.43 12 8.1 4.880 5.181 101 17.6 19:04 (180, 43) C/2025 L2 Now it is 17.3 mag (Aug. 6, ATLAS South Africa). It stays 18 mag for a while. In the Northern Hemisphere, it will be unobservable in October. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 21 48.24 -38 30.8 2.188 3.143 156 17.7 0:40 ( 0, 87) Aug. 16 21 38.08 -41 47.8 2.182 3.113 152 17.6 0:03 ( 0, 83) 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 18 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 6 32.51 -17 10.9 8.328 7.745 51 17.6 5:21 (268, 34) Aug. 16 6 34.91 -17 19.3 8.320 7.793 55 17.6 5:14 (265, 38) 493P/2024 Q2 ( LONEOS ) Now it is 17.3 mag (Aug. 6, ATLAS-MLO, Mauna Loa). Brightening slowly. 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) Aug. 9 4 26.76 40 50.5 4.237 3.939 66 17.7 5:21 (202, 10) Aug. 16 4 34.62 41 43.3 4.140 3.929 70 17.6 5:14 (199, 10) 491P/2024 K2 ( Spacewatch-PanSTARRS ) Now it is 17.4 mag (July 24, 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) Aug. 9 19 48.87 -23 37.0 3.044 4.004 158 17.7 22:36 (180, 79) Aug. 16 19 45.33 -23 31.8 3.100 4.015 150 17.7 22:05 (180, 78) C/2023 V1 ( Lemmon ) Now it is 17.7 mag (July 25, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 15 32.81 52 48.1 5.174 5.097 79 17.7 18:50 (176, 2) Aug. 16 15 28.34 51 0.0 5.226 5.099 77 17.7 18:54 (170, 3) C/2022 U1 ( Leonard ) Now it is 17.6 mag (July 15, Jean-Gabriel Bosch). Fading slowly. 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) Aug. 9 17 58.20 8 58.0 5.203 5.847 125 17.9 20:46 (180, 46) Aug. 16 17 53.45 7 55.4 5.321 5.885 119 17.9 20:13 (180, 47) 105P/Singer Brewster It faded down to 20.0 mag, fainter than predicted by 3-4 mag, after the perihelion passage (Mar. 12, Taras Prystavski). However, it is brightening very rapidly after that. Now it is 18.0 mag (Aug. 3, Jean-Gabriel Bosch). 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) Aug. 9 20 2.09 -6 29.4 1.536 2.512 159 18.0 22:49 (180, 61) Aug. 16 19 58.47 -7 13.8 1.590 2.539 153 17.9 22:18 (180, 62) C/2025 K4 ( Siverd ) Now it is 17.5 mag (June 19, J. L. Virlichie, P. Traverse, H. Roy). 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) Aug. 9 16 21.01 -44 52.9 1.969 2.540 112 18.0 19:10 ( 0, 80) Aug. 16 16 30.30 -42 35.9 2.039 2.545 108 18.1 18:54 ( 3, 82) 362P/(457175) 2008 GO98 Now it is 18.3 mag (Aug. 1, Michael Jager). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 21 37.61 3 12.0 2.483 3.453 160 18.4 0:29 (180, 52) Aug. 16 21 33.29 2 34.2 2.488 3.471 163 18.5 23:53 (180, 52) P/2025 D4 ( ATLAS ) It continued brightening even after the perihelion passage. Now it is 17.7 mag (July 28, ATLAS South Africa). Fading slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 9 14 51.91 -13 53.6 3.392 3.512 88 18.6 18:50 (139, 64) Aug. 16 14 58.02 -14 2.5 3.507 3.532 83 18.7 18:54 (128, 60)