Weekly Information about Bright Comets (2026 Oct. 10: North)

Japanese version Home page	Updated on October 18, 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 It brightened up to 6.9 mag in summer (Aug. 5, Juan Jose Gonzalez). Now it is 11.2 mag (Oct. 13, Yoshimi Nagai). It will fade out rapidly after this. 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) Oct. 10 22 56.79 -31 59.7 0.738 1.588 131 10.2 21:42 ( 0, 23) Oct. 17 23 4.66 -30 23.9 0.804 1.621 127 10.5 21:22 ( 0, 25) 161P/Hartley-IRAS Now it is 10.3 mag (Oct. 9, Toru Yusa). Fading 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) Oct. 10 21 51.83 2 15.5 0.548 1.429 132 10.4 20:32 ( 0, 58) Oct. 17 20 58.02 7 27.3 0.644 1.388 113 10.5 19:12 ( 0, 63) P/2026 R2 ( Leonard ) New bright comet. It approached to Earth down to 0.3 a.u. in early October. Now it is 11.8 mag (Oct. 12, Mike Olason). It will fade out rapidly after this. It will be fainter than 18 mag in January. In the Northern Hemisphere, it will be unobservable soon. 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) Oct. 10 16 28.87 -14 35.4 0.327 0.837 51 12.3 18:56 ( 55, 16) Oct. 17 16 28.51 -40 37.8 0.418 0.804 51 12.7 18:47 ( 40, -5) 169P/NEAT It approached to Earth down to 0.17 a.u. mid August, and brightened up to 10.8 mag (Aug. 11, Thomas Lehmann). Now it is 12.5 mag (Oct. 8, Ken Harikae). Fading rapidly. It will be fainter than 18 mag in November. 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) Oct. 10 10 15.03 1 59.3 0.949 0.701 42 12.6 4:37 (283, 21) Oct. 17 10 32.40 0 22.0 1.050 0.773 44 13.7 4:43 (287, 23) C/2024 T5 ( ATLAS ) Now it is 13.0 mag (Oct. 14, Osamu Miyazaki). It stays 12 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 5 46.10 -13 34.3 3.857 4.247 106 12.7 4:33 ( 0, 41) Oct. 17 5 46.26 -13 38.7 3.752 4.222 111 12.6 4:06 ( 0, 41) 252P/LINEAR It has not been observed yet in this apparition. It has brightened up to 4 mag in 2016, and 10 mag in 2021. It brightens up to 11.5 mag, but it will turn to fade out rapidly after that. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable temporarily in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 11 5.52 0 39.5 1.831 1.080 29 13.4 4:37 (276, 10) Oct. 17 11 35.24 -1 48.5 1.810 1.048 28 12.8 4:43 (279, 9) C/2026 A2 ( Bok ) Now it is 12.5 mag (Oct. 12, Thomas Lehmann). It stays 13 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 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 18 36.92 65 45.9 1.828 2.136 93 13.6 18:56 (163, 56) Oct. 17 19 5.71 62 49.2 1.753 2.102 95 13.4 18:47 (161, 59) 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). Another major outburst occued on Aug. 5 and it brightened up to 6.4 mag (Aug. 6, Taras Prystavski). Now it is 12.4 mag (Oct. 14, Toru Yusa). Fading rapidly. 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) Oct. 10 3 30.05 4 46.6 1.018 1.910 142 13.6 2:18 ( 0, 60) Oct. 17 3 25.84 3 54.5 1.019 1.946 149 14.3 1:46 ( 0, 59) C/2024 J3 ( ATLAS ) Now it is 12.9 mag (Oct. 1, Osamu Miyazaki). 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 soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 18 26.49 41 35.4 3.791 3.887 88 13.6 18:56 (116, 69) Oct. 17 18 28.28 41 17.8 3.833 3.881 85 13.6 18:47 (114, 65) 260P/McNaught Now it is 13.8 mag (Oct. 7, Kunihiro Shima). It will fade out rapidly after this. It will be fainter than 18 mag in January. 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) Oct. 10 6 1.32 44 54.7 1.013 1.595 104 13.6 4:37 (192, 80) Oct. 17 6 11.18 46 25.3 1.001 1.631 109 13.8 4:31 (180, 79) 88P/Howell It brightened up to 9.6 mag in the very low sky in spring (Apr. 14, Chris Wyatt). Now it is 13.5 mag (Oct. 14, Toru Yusa). It will fade out rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 3 1.44 14 24.5 1.498 2.411 149 13.7 1:49 ( 0, 70) Oct. 17 2 54.22 14 3.3 1.504 2.456 157 13.9 1:15 ( 0, 69) 78P/Gehrels 2 Now it is 13.3 mag (Oct. 13, Thomas Lehmann). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 7 33.93 16 9.6 2.055 2.185 83 13.8 4:37 (303, 60) Oct. 17 7 42.92 15 24.6 1.997 2.207 88 13.8 4:43 (313, 63) 29P/Schwassmann-Wachmann 1 Now it is 13.6 mag (Aug. 2, Andrew Pearce). Now it is not observable. It will appear soon 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) Oct. 10 12 10.30 -8 3.0 7.289 6.318 12 14.3 4:37 (274, -9) Oct. 17 12 14.97 -8 37.2 7.261 6.318 17 14.3 4:43 (278, -3) 11P/Tempel-Swift-LINEAR Now it is 15.0 mag (Oct. 12, D. Buczynski). It brightens up to 13 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 2 8.96 38 57.5 0.495 1.429 143 15.2 0:56 (180, 86) Oct. 17 2 18.51 37 33.5 0.461 1.413 149 14.3 0:39 (180, 87) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. Now it is 14.2 mag (Oct. 4, Andrew Pearce). It stays 14 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) Oct. 10 7 39.24 -72 18.6 13.668 13.546 80 14.5 4:37 (352,-19) Oct. 17 7 41.87 -72 46.3 13.660 13.526 80 14.5 4:43 (354,-19) C/2024 R4 ( PanSTARRS ) Now it is 14.5 mag (Oct. 15, Toru Yusa). 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 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 19 51.61 46 20.7 5.053 5.375 103 14.5 18:56 (163, 78) Oct. 17 19 47.25 45 33.0 5.077 5.344 100 14.5 18:47 (145, 77) (3200) Phaethon Parent object of Geminids meteor shower. It approached to Sun down to 0.14 a.u. on Sept. 2. Now it is 14.5 mag (Oct. 12, Katsumi Yoshimoto). It will fade out rapidly after this. It will be fainter than 18 mag in December. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will be observable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 16 44.62 55 42.9 0.368 0.986 77 14.9 18:56 (138, 51) Oct. 17 19 1.75 53 10.7 0.404 1.099 93 14.8 18:47 (147, 67) C/2023 R1 ( PanSTARRS ) Now it is 14.7 mag (Sept. 19, Mike Olason). It stays 15 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in November in the Southern Hemisphere. But it will be observable again in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 15 28.25 -18 28.6 4.661 3.922 37 14.9 18:56 ( 64, 4) Oct. 17 15 29.44 -19 4.4 4.764 3.948 31 15.0 18:47 ( 66, 1) 123P/West-Hartley Now it is 15.9 mag (Oct. 12, M. Jaeger, G. Rhemann, E. Prosperi). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 11 38.16 13 34.8 2.987 2.163 28 14.9 4:37 (261, 10) Oct. 17 11 52.47 11 58.7 2.956 2.168 31 14.9 4:43 (265, 13) C/2025 V2 ( Rankin ) It is expected to brighten up to 12.5 mag in 2027 spring. Brightening gradually. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it is not observable now, but it will appear in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 12 14.52 16 6.6 3.629 2.759 25 15.7 4:37 (253, 4) Oct. 17 12 27.69 15 32.1 3.537 2.704 28 15.6 4:43 (257, 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 getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 11 18.73 26 21.9 6.897 6.178 40 15.6 4:37 (252, 21) Oct. 17 11 24.58 26 17.4 6.852 6.201 46 15.6 4:43 (255, 26) 63P/Wild 1 It brightened up to 13.0 mag in early summer (July 3, Thomas Lehmann). It will fade out rapidly after this. It will be fainter than 18 mag in December. Now it is not observable. It will appear in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 13 14.44 -14 58.1 3.164 2.184 9 15.6 18:56 ( 85,-20) Oct. 17 13 28.59 -16 55.7 3.197 2.214 7 15.8 18:47 ( 84,-22) C/2025 Y1 ( ATLAS ) Now it is 16.1 mag (Aug. 5, Ken-ichi Kadota). Brightening slowly. Now it is not observable. It will appear in November in the Northern Hemisphere, or in December in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 13 49.58 -2 36.2 5.488 4.520 12 15.7 18:56 ( 91, -6) Oct. 17 13 56.70 -3 11.2 5.447 4.468 9 15.7 18:47 ( 92, -9) C/2022 N2 ( PanSTARRS ) Now it is 15.9 mag (Sept. 23, Thomas Lehmann). It stays 16 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) Oct. 10 7 29.60 25 28.5 5.300 5.327 86 15.9 4:37 (287, 67) Oct. 17 7 32.15 25 24.6 5.230 5.367 92 15.9 4:43 (298, 72) C/2025 M2 ( PanSTARRS ) It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 15.9 mag (Aug. 28, Jean-Claude Merlin). Brightening slowly. It will be unobservable in December. But it will be observable again in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 18 42.24 -21 27.0 4.849 4.839 83 16.0 18:56 ( 24, 30) Oct. 17 18 40.03 -21 27.1 4.929 4.788 76 15.9 18:47 ( 29, 28) 112P/Urata-Niijima Now it is 16.5 mag (Oct. 14, Toru Yusa). Fading gradually. It will be fainter than 18 mag in January. 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) Oct. 10 7 33.89 39 50.8 1.099 1.455 87 16.2 4:37 (249, 69) Oct. 17 7 59.36 41 47.7 1.079 1.467 89 16.1 4:43 (243, 70) 114P/Wiseman-Skiff Now it is 16.6 mag (Oct. 9, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in February. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 8 59.37 14 38.6 1.767 1.591 63 16.3 4:37 (283, 43) Oct. 17 9 15.44 12 7.2 1.731 1.604 65 16.3 4:43 (290, 45) C/2021 G2 ( ATLAS ) Now it is 16.1 mag (Oct. 15, Toru Yusa). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after December. In the Southern Hemisphere, it will be unobservable in November. But it will be observable again in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 17 11.37 12 32.3 7.873 7.509 65 16.3 18:56 ( 72, 44) Oct. 17 17 14.61 12 16.8 7.984 7.546 60 16.4 18:47 ( 75, 41) 2P/Encke It will brighten up to 6-7 mag from January to February. Now it is 16.4 mag (Oct. 7, D. Buczynski). It will brighten rapidly after this. It will be getting lower gradually after this, and it will be unobservable in January in the Southern Hemisphere, or in February in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 0 30.43 19 11.6 1.077 2.059 165 16.5 23:13 ( 0, 74) Oct. 17 0 12.88 18 4.7 1.018 1.984 160 16.4 22:28 ( 0, 73) 84P/Giclas Now it is 17.3 mag (Oct. 2, Andrew Pearce). It stays 16 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) Oct. 10 20 24.87 -26 12.6 1.556 2.066 105 16.5 19:10 ( 0, 29) Oct. 17 20 31.43 -25 52.6 1.600 2.033 100 16.4 18:49 ( 0, 29) C/2025 J1 ( Borisov ) Now it is 16.8 mag (Sept. 23, 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) Oct. 10 7 14.97 11 22.9 3.647 3.742 87 16.5 4:37 (316, 59) Oct. 17 7 13.21 9 40.0 3.546 3.761 94 16.5 4:43 (333, 62) C/2026 AZ17 ( Bok ) Now it is 16.7 mag (Oct. 11, Alfons Diepvens). It stays 17 mag for a while. It will be getting lower gradually after this, and it will be unobservable in January in the Northern Hemisphere, or in December in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 17 36.16 1 12.2 2.691 2.518 69 16.7 18:56 ( 55, 41) Oct. 17 17 47.95 -0 29.5 2.744 2.505 65 16.7 18:47 ( 55, 38) C/2022 R6 ( PanSTARRS ) It was observed at 16 mag from 2025 to 2026. Now it is 17.3 mag (Oct. 2, P.-J. Dekelver). It stays 17 mag for a while. It will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 10 7.82 5 4.8 7.790 7.113 44 17.0 4:37 (281, 24) Oct. 17 10 11.35 5 4.8 7.723 7.131 50 17.0 4:43 (286, 30) 493P/2024 Q2 ( LONEOS ) Now it is 17.7 mag (Sept. 25, P.-J. Dekelver). It stays 17 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 be observable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 9 54.83 31 43.8 4.577 4.141 58 17.1 4:37 (255, 40) Oct. 17 10 1.74 31 19.1 4.507 4.157 63 17.1 4:43 (259, 45) 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). It faded down to 13.4 mag until summer (Aug. 15, 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) Oct. 10 7 26.92 -27 41.6 2.986 2.999 81 17.1 4:37 (337, 23) Oct. 17 7 21.12 -29 8.9 2.981 3.088 86 17.2 4:43 (346, 24) 346P/Catalina Now it is 17.5 mag (Oct. 2, ATLAS-HKO, Haleakala). 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) Oct. 10 8 39.94 18 46.2 2.450 2.288 68 17.2 4:37 (282, 49) Oct. 17 8 51.79 18 55.3 2.385 2.303 73 17.1 4:43 (286, 53) C/2025 E1 ( PanSTARRS ) Now it is 17.6 mag (Sept. 12, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 12 43.03 -78 8.1 4.199 4.001 71 17.1 4:37 (346,-37) Oct. 17 13 26.27 -79 24.0 4.226 4.003 70 17.2 18:47 ( 13,-37) C/2025 A1 ( Lemmon ) Now it is 16.8 mag (Oct. 8, Kunihiro Shima). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 11 4.15 30 29.2 6.107 5.464 46 17.3 4:37 (250, 26) Oct. 17 11 11.32 30 21.4 6.025 5.453 50 17.3 4:43 (253, 30) P/2018 VN2 = P/2026 M2 ( Leonard ) First return of a new periodic comet which was observed at 18 mag in 2018. Now it is 17.2 mag (Sept. 5, ATLAS-MLO, Mauna Loa). Fading gradually. It will be fainter than 18 mag in December. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 2 1.97 24 7.1 1.212 2.167 156 17.3 0:50 ( 0, 79) Oct. 17 1 58.95 22 30.8 1.203 2.179 164 17.3 0:19 ( 0, 78) C/2019 E3 ( ATLAS ) Very far object. It stays 18 mag for a while. In the Northern Hemisphere, it will be unobservable in February. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 0 3.47 -45 7.0 11.110 11.737 126 17.4 22:47 ( 0, 10) Oct. 17 23 59.96 -44 54.0 11.186 11.754 122 17.4 22:16 ( 0, 10) 188P/LINEAR-Mueller Now it is 17.9 mag (Aug. 24, W. Hasubick). Fading slowly. It will be fainter than 18 mag in January. 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) Oct. 10 6 21.11 35 7.0 2.447 2.824 101 17.5 4:37 (267, 84) Oct. 17 6 25.40 35 35.7 2.380 2.844 107 17.5 4:43 (222, 89) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 17.2 mag (Oct. 12, Thomas Lehmann). Fading slowly. It will be fainter than 18 mag in November. 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) Oct. 10 21 51.89 24 8.8 6.545 7.247 131 17.5 20:36 ( 0, 79) Oct. 17 21 48.74 23 7.9 6.657 7.291 126 17.6 20:05 ( 0, 78) C/2024 G4 ( PanSTARRS ) Now it is 17.6 mag (Sept. 16, ATLAS Chile). 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 20 4.91 -6 35.4 4.792 5.145 105 17.5 18:56 ( 2, 48) Oct. 17 20 7.50 -7 11.7 4.911 5.161 98 17.6 18:47 ( 8, 48) C/2025 B2 ( Borisov ) Now it is 17.2 mag (Oct. 1, Taras Prystavski). 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) Oct. 10 17 1.67 73 24.4 8.213 8.240 88 17.6 18:56 (162, 45) Oct. 17 17 8.77 72 18.1 8.201 8.241 88 17.6 18:47 (161, 45) C/2026 P2 ( PanSTARRS ) It is expected to brighten up to 13.5 mag from late 2027 to early 2028. At the high light, it will be observable in good condition in the Northern Hemisphere. But it will not be observable in the Southern Hemisphere. Now it is 17.3 mag (Oct. 7, Ken-ichi Kadota). 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) Oct. 10 1 29.42 -1 47.4 3.818 4.802 169 17.7 0:18 ( 0, 53) Oct. 17 1 22.99 -1 39.0 3.765 4.748 169 17.6 23:39 ( 0, 54) 93P/Lovas 1 Now it is 17.7 mag (Sept. 22, P.-J. Dekelver). 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) Oct. 10 10 5.42 17 20.7 2.833 2.309 49 17.7 4:37 (270, 31) Oct. 17 10 16.14 16 11.3 2.807 2.352 53 17.8 4:43 (274, 35) C/2023 X2 ( Lemmon ) Now it is 17.8 mag (July 6, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. 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) Oct. 10 15 7.30 53 35.1 5.864 5.529 65 17.8 18:56 (135, 35) Oct. 17 15 15.13 52 19.6 5.885 5.549 65 17.8 18:47 (134, 33) 65P/Gunn Now it is 17.7 mag (Oct. 7, Hidenori Nohara). 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) Oct. 10 0 23.33 -8 49.5 2.686 3.649 162 17.8 23:07 ( 0, 46) Oct. 17 0 18.99 -9 0.4 2.735 3.665 155 17.9 22:35 ( 0, 46) P/2009 Y2 ( Kowalski ) Now it is 18.2 mag (Oct. 6, Toshiyuki Takahashi). 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. But it will become high in winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 5 20.26 39 44.5 1.842 2.417 113 18.0 4:08 (180, 85) Oct. 17 5 24.50 39 1.4 1.757 2.405 119 17.8 3:45 (180, 86) 373P/Rinner It has not been observed yet in this apparition. It has brightened up to 4 mag in 2016, and 10 mag in 2021. It was not detected, fainter than 20 mag on Sept. 14 (Jean-Francois Soulier). 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 higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 8 31.16 8 24.9 2.482 2.314 68 17.9 4:37 (296, 45) Oct. 17 8 41.58 7 4.3 2.413 2.320 72 17.9 4:43 (303, 48) P/2021 N1 = P/2026 M1 ( ZTF ) First return of a new periodic comet which brightened up to 17 mag in 2021. It approached to Earth down to 0.17 a.u. from June to July. It brightened up to 15.2 mag (July 14, Andrew Pearce). Now it is 18.2 mag (Sept. 19, Mike Olason). It will fade out rapidly after this. 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) Oct. 10 4 59.36 48 24.9 0.637 1.390 114 18.4 3:48 (180, 77) Oct. 17 4 49.95 48 25.1 0.652 1.452 122 18.6 3:11 (180, 77) 266P/Christensen Now it is 18.8 mag (Oct. 12, D. Buczynski). Brightening 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) Oct. 10 7 24.88 25 40.7 2.184 2.358 87 18.9 4:37 (288, 68) Oct. 17 7 34.81 25 30.2 2.096 2.351 91 18.7 4:43 (297, 72) SWAN26Q New comet discovered on Aug. 24 from SWAN images by Hanjie Tan. Although it was bright as 11 mag at the discovery, it faded down to 14 mag on Sept. 9. It was not detected, fainter than 16 mag, on Oct. 8. (Mike Olason). Fading rapidly. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 10 11 29.36 1 48.2 1.805 0.982 24 19.2 4:37 (272, 5) Oct. 17 11 27.23 -1 15.3 1.857 1.120 30 19.9 4:43 (279, 11)