Weekly Information about Bright Comets (2026 July 25: North)

Japanese version Home page	Updated on July 28, 2026
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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.

10P/Tempel 2 Now it is 8.5 mag (July 21, Toru Yusa). It will fade out rapidly after this. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 21 40.77 -21 0.4 0.422 1.420 160 8.1 1:32 ( 0, 34) Aug. 1 21 49.93 -24 8.9 0.415 1.418 163 8.0 1:13 ( 0, 31) 88P/Howell It brightened up to 9.6 mag in the very low sky in spring (Apr. 14, Chris Wyatt). Now it is 12.6 mag (July 19, Yoshimi Nagai). Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 2 44.14 12 24.7 1.808 1.902 79 12.1 3:24 (285, 41) Aug. 1 2 52.93 13 5.9 1.777 1.948 83 12.2 3:31 (290, 47) 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 12.6 mag (June 23, Andrew Pearce). Fading gradually. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 7 23.71 -14 21.3 2.652 1.932 36 13.0 3:24 (266,-31) Aug. 1 7 27.46 -15 11.3 2.735 2.037 38 13.3 3:31 (272,-25) C/2024 T5 ( ATLAS ) Now it is 13.8 mag (July 14, Andrew Pearce). Brightening slowly. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. It is expected to brighten up to 11 mag in winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 5 3.09 -13 15.1 5.024 4.564 57 13.2 3:24 (285, -2) Aug. 1 5 9.17 -13 5.0 4.931 4.533 61 13.1 3:31 (289, 4) 169P/NEAT It will approach to Earth down to 0.17 a.u. in August. It is expected to brighten up to 10 mag from August to September. Now it is 14.2 mag (July 13, Kunihiro Shima). It brightens up to 10 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in November. 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) July 25 18 4.84 26 27.0 0.258 1.180 123 14.3 21:49 ( 0, 82) Aug. 1 17 4.23 34 2.5 0.205 1.090 106 13.1 20:40 ( 86, 86) 78P/Gehrels 2 Now it is 13.4 mag (July 8, Ken-ichi Kadota). It stays 13 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. 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) July 25 5 2.52 20 42.0 2.602 2.020 45 13.2 3:24 (257, 18) Aug. 1 5 18.95 20 45.7 2.560 2.027 48 13.2 3:31 (259, 22) 260P/McNaught It will brighten up to 13 mag and will be observable in good condition from summer to autumn. Now it is 13.5 mag (July 13, Kunihiro Shima). Fading slowly. 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) July 25 2 40.88 18 53.8 1.228 1.423 78 13.5 3:24 (279, 46) Aug. 1 3 1.11 22 2.7 1.197 1.419 79 13.3 3:31 (277, 50) C/2024 J3 ( ATLAS ) Now it is 13.7 mag (July 14, Kunihiro Shima). It stays 14 mag for a while. 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) July 25 19 21.93 41 47.2 3.445 4.013 117 13.5 23:08 (180, 83) Aug. 1 19 12.52 42 33.1 3.449 3.997 115 13.5 22:31 (180, 82) 220P/McNaught Major outburst of about 9 mag occured from May 31 to June 1, and it brightened up to 8.3 mag (June 3, Marco Goiato). Now it is 13.3 mag (July 21, Osamu Miyazaki). Fading rapidly. 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) July 25 2 14.55 8 56.0 1.296 1.609 87 13.5 3:24 (295, 45) Aug. 1 2 29.15 9 18.7 1.263 1.626 90 13.9 3:31 (300, 49) C/2023 R1 ( PanSTARRS ) Now it is 13.5 mag (July 14, Osamu Miyazaki). Fading slowly. It will be getting lower gradually after this, and 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) July 25 16 5.42 -11 34.2 3.083 3.690 119 13.8 20:48 ( 18, 42) Aug. 1 15 55.92 -12 15.0 3.222 3.706 110 13.9 20:40 ( 27, 39) 29P/Schwassmann-Wachmann 1 Now it is 15.0 mag (July 8, Andrew Pearce). It will be unobservable in September in the Southern Hemisphere, or in October in the Northern Hemisphere. But it will be observable again 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) July 25 11 20.84 -2 35.0 6.913 6.317 50 14.2 20:48 ( 85, 3) Aug. 1 11 24.73 -2 58.1 6.994 6.317 45 14.2 20:40 ( 87, -1) 63P/Wild 1 Now it is 14.8 mag (July 5, Martin Masek). Fading gradually. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be unobservable in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 10 38.51 9 17.6 2.714 1.984 35 14.5 20:48 (100, 1) Aug. 1 10 52.91 7 0.5 2.758 1.991 33 14.6 20:40 ( 99, -1) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.9 mag (May 19, 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) July 25 6 40.19 -68 26.8 13.736 13.772 89 14.6 3:24 (333,-38) Aug. 1 6 46.96 -68 39.1 13.726 13.751 89 14.6 3:31 (334,-36) C/2024 R4 ( PanSTARRS ) Now it is 14.9 mag (July 11, Alfons Diepvens). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 21 30.58 47 57.6 5.304 5.735 110 14.9 1:22 (180, 77) Aug. 1 21 21.14 48 40.0 5.233 5.701 112 14.9 0:45 (180, 76) 123P/West-Hartley Now it is 16.9 mag (May 17, Kunihiro Shima). It stays 15 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) July 25 8 44.37 28 51.9 3.195 2.207 11 15.3 20:48 (133, -7) Aug. 1 9 1.25 27 49.5 3.186 2.196 10 15.2 20:40 (132, -8) C/2022 QE78 ( ATLAS ) Now it is 15.5 mag (June 14, Alfons Diepvens). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in August. But it will be observable again in September. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 10 8.61 29 6.7 6.828 5.943 27 15.4 20:48 (121, 7) Aug. 1 10 14.99 28 47.5 6.879 5.962 23 15.4 20:40 (122, 4) C/2026 A2 ( Bok ) It will brighten up to 13 mag from autumn to winter. Now it is 15.6 mag (July 20, Toru Yusa). Brightening 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 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 16 17.14 78 53.4 2.698 2.644 76 15.6 20:48 (177, 46) Aug. 1 16 7.47 78 27.0 2.636 2.591 76 15.5 20:40 (175, 46) C/2021 G2 ( ATLAS ) Now it is 15.5 mag (July 13, Martin Masek). It stays 16 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) July 25 16 59.70 15 49.6 6.555 7.118 120 15.6 20:48 ( 0, 71) Aug. 1 16 58.68 15 37.8 6.662 7.153 115 15.7 20:40 ( 15, 70) C/2022 N2 ( PanSTARRS ) Now it is 15.8 mag (May 7, Ken-ichi Kadota). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be unobservable temporarily in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 6 28.68 26 45.8 5.808 4.911 25 15.7 3:24 (240, 5) Aug. 1 6 36.10 26 39.7 5.795 4.948 30 15.8 3:31 (244, 10) 161P/Hartley-IRAS It is expected to brighten up 10 mag from autumn to winter, and it will be observable in good condition. Now it is 17.8 mag (July 8, Gerald Rhemann, Michael Jager). Brightening rapidly. 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) July 25 3 21.34 -20 2.1 1.947 2.073 82 16.3 3:24 (306, 13) Aug. 1 3 21.74 -19 38.5 1.778 2.008 87 15.8 3:31 (312, 19) P/2026 M1 ( 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 was expected to brighten up to 14 mag. But actually, it is fainter than originally expected. Now it is 15.5 mag (July 8, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in September. 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) July 25 2 56.01 28 35.1 0.279 0.968 72 16.1 3:24 (264, 47) Aug. 1 3 20.98 33 50.7 0.328 0.968 72 16.4 3:31 (257, 51) C/2025 Y1 ( ATLAS ) Now it is 16.2 mag (July 9, Ken-ichi Kadota). It stays 16 mag for a while. It will be unobservable in September in the Northern Hemisphere, or in October 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) July 25 12 50.49 3 13.3 5.376 5.098 68 16.2 20:48 ( 76, 24) Aug. 1 12 54.02 2 48.7 5.421 5.045 63 16.2 20:40 ( 78, 21) C/2025 M2 ( PanSTARRS ) It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 16.2 mag (July 14, ATLAS South Africa). 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) July 25 19 57.92 -19 36.9 4.392 5.406 175 16.5 23:45 ( 0, 35) Aug. 1 19 48.55 -19 57.5 4.361 5.354 166 16.5 23:08 ( 0, 35) 235P/LINEAR It became brighter than expected. It was observed at 13 mag from winter to spring. Now it is 15.7 mag (July 14, Toru Yusa). It will fade out rapidly after this. 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) July 25 16 36.38 -9 7.5 1.816 2.549 126 16.5 20:48 ( 8, 45) Aug. 1 16 38.39 -9 34.6 1.915 2.579 120 16.8 20:40 ( 14, 44) 65P/Gunn Now it is 18.4 mag (July 10, W. Hasubick). 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) July 25 0 53.15 -5 5.6 2.980 3.479 111 16.8 3:24 (331, 46) Aug. 1 0 54.14 -5 13.5 2.907 3.494 117 16.8 3:31 (343, 48) C/2024 G6 ( ATLAS ) Now it is 16.8 mag (July 1, Alfons Diepvens). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 15 10.37 15 35.1 6.312 6.515 97 16.8 20:48 ( 58, 59) Aug. 1 15 8.40 15 37.2 6.427 6.522 90 16.8 20:40 ( 65, 55) C/2026 AZ17 ( Bok ) Now it is 17.0 mag (July 14, Alfons Diepvens). 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) July 25 16 20.14 22 39.5 2.293 2.787 108 17.0 20:48 ( 37, 75) Aug. 1 16 22.03 20 53.0 2.311 2.754 105 16.9 20:40 ( 45, 71) 114P/Wiseman-Skiff It has not been observed yet in this apparition. It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. 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) July 25 5 9.11 31 15.8 2.242 1.657 43 17.1 3:24 (246, 22) Aug. 1 5 32.42 30 56.2 2.190 1.636 44 17.0 3:31 (248, 24) C/2024 G4 ( PanSTARRS ) Now it is 16.8 mag (July 10, Alfons Diepvens). 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) July 25 20 11.06 1 51.7 4.038 4.996 158 17.0 0:03 ( 0, 57) Aug. 1 20 8.65 1 10.7 4.047 5.007 158 17.0 23:28 ( 0, 56) C/2025 E1 ( PanSTARRS ) Now it is 17.2 mag (June 2, ATLAS Chile). It stays 17 mag for a while. 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) July 25 9 19.50 -64 13.2 3.993 4.032 84 17.1 20:48 ( 32,-42) Aug. 1 9 29.43 -64 58.6 4.009 4.025 83 17.1 20:40 ( 31,-43) C/2023 RS61 ( PanSTARRS ) It is around 20 mag usually. However, it brightened in outburst in 2025 autumn up to 17.0 mag (Sept. 4, Taras Prystavski). Now it is 17.3 mag (Mar. 6, ATLAS-HKO, Haleakala). 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) July 25 4 19.81 39 58.3 9.080 8.522 53 17.3 3:24 (242, 34) Aug. 1 4 23.36 40 18.0 8.985 8.514 59 17.3 3:31 (244, 40) C/2019 E3 ( ATLAS ) Very far object. It stays 17 mag for a while. 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) July 25 0 39.32 -43 59.8 10.999 11.552 120 17.3 3:24 (348, 10) Aug. 1 0 37.30 -44 15.9 10.957 11.568 124 17.3 3:31 (355, 11) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 17.2 mag (July 10, Ken-ichi Kadota). It stays 18 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) July 25 22 49.78 32 4.8 6.245 6.758 116 17.4 2:41 ( 0, 87) Aug. 1 22 44.47 31 49.6 6.207 6.802 122 17.4 2:08 ( 0, 87) C/2023 X2 ( Lemmon ) Now it is 17.8 mag (July 6, 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) July 25 13 43.30 71 26.0 5.613 5.329 68 17.5 20:48 (160, 46) Aug. 1 13 50.25 69 38.6 5.635 5.345 68 17.5 20:40 (157, 45) 112P/Urata-Niijima It has not been observed yet in this apparition. It is expected to brighten up to 15 mag in autumn. Brightening gradually. 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) July 25 3 27.83 11 26.6 1.615 1.577 69 18.0 3:24 (279, 32) Aug. 1 3 46.41 14 5.3 1.546 1.548 70 17.6 3:31 (279, 37) 188P/LINEAR-Mueller Now it is 18.2 mag (Jan. 17, Kunihiro Shima). 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) July 25 4 35.69 29 20.0 3.170 2.643 50 17.7 3:24 (252, 27) Aug. 1 4 48.00 30 1.4 3.115 2.656 54 17.7 3:31 (254, 32) C/2025 B2 ( Borisov ) Now it is 17.2 mag (July 20, 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) July 25 17 16.15 85 59.2 8.482 8.244 73 17.7 20:54 (180, 39) Aug. 1 16 52.30 85 0.5 8.455 8.243 74 17.7 20:40 (179, 40) C/2026 C1 ( Tsuchinshan ) It is expected to brighten up to 4 mag in 2028 autumn. Now it is 17.2 mag (July 9, Yasukazu Ikari). It stays 17 mag for a while. It will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. But it will be observable again in October in the Northern Hemisphere, or in November 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) July 25 12 6.76 6 7.4 9.259 8.757 57 17.8 20:48 ( 85, 17) Aug. 1 12 7.85 5 47.7 9.301 8.703 51 17.7 20:40 ( 88, 13) C/2023 H5 ( Lemmon ) Now it is 17.2 mag (July 8, 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) July 25 21 30.21 67 11.7 5.217 5.348 91 17.8 1:21 (180, 58) Aug. 1 21 20.56 66 42.9 5.199 5.381 94 17.8 0:44 (180, 58) P/2026 L3 ( Gibbs ) It was observed at 17 mag in 2012. It was expected to brighten up to 17 mag again in this apparition. But actually, it is much fainter. Now it is 19.7 mag (July 14, Martin Masek). Fading slowly. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 25 20 12.58 -17 58.6 1.087 2.102 178 20.9 0:04 ( 0, 37) Aug. 1 20 8.97 -19 23.1 1.095 2.105 171 20.9 23:29 ( 0, 36)