Weekly Information about Bright Comets (2026 Sept. 26: North)

Japanese version Home page	Updated on September 27, 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 8.9 mag (Sept. 17, Yoshimi Nagai). It will fade out rapidly 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) Sept.26 22 42.51 -34 23.8 0.623 1.530 139 9.5 22:23 ( 0, 21) Oct. 3 22 49.42 -33 21.1 0.678 1.558 135 9.8 22:02 ( 0, 22) 161P/Hartley-IRAS Now it is 11.4 mag (Sept. 21, Mike Olason). Fading slowly. 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) Sept.26 0 21.79 -10 50.5 0.530 1.525 167 10.9 0:09 ( 0, 44) Oct. 3 23 4.00 -4 29.5 0.504 1.475 155 10.5 22:10 ( 0, 51) 169P/NEAT It approached to Earth down to 0.17 a.u. mid August. Now it is 11.1 mag (Sept. 19, Mike Olason). It will fade out rapidly after this. It will be fainter than 18 mag in November. In the Northern Hemisphere, it will be getting higher gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 9 43.42 5 43.9 0.711 0.611 37 10.8 4:26 (274, 16) Oct. 3 9 58.09 3 45.5 0.834 0.644 39 11.6 4:32 (279, 18) 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 11.8 mag (Sept. 24, Osamu Miyazaki). 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) Sept.26 3 33.08 6 32.6 1.039 1.842 128 12.2 3:16 ( 0, 62) Oct. 3 3 32.55 5 40.3 1.025 1.876 135 12.9 2:48 ( 0, 61) C/2024 T5 ( ATLAS ) Now it is 12.9 mag (Sept. 3, Jean-Gabriel Bosch). 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) Sept.26 5 43.45 -13 20.4 4.076 4.299 96 12.9 4:26 (341, 40) Oct. 3 5 45.15 -13 27.8 3.965 4.273 101 12.8 4:32 (351, 41) C46K1R1 New comet discovered on Sept. 14 by Catalina Sky Survey. Now it is 13.2 mag (Sept. 16, Martin Masek). It brightens up to 13 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in December. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in October. 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) Sept.26 16 14.26 43 41.6 0.429 0.949 70 13.9 19:15 (116, 51) Oct. 3 16 23.57 18 58.4 0.333 0.887 60 13.1 19:05 ( 83, 40) 78P/Gehrels 2 Now it is 13.6 mag (Sept. 8, M. Jaeger, G. Rhemann, E. Prosperi). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 7 12.88 17 36.2 2.167 2.143 75 13.3 4:26 (288, 53) Oct. 3 7 23.89 16 53.8 2.111 2.163 79 13.3 4:32 (295, 56) 260P/McNaught Now it is 13.4 mag (Sept. 8, M. Jaeger, G. Rhemann, E. Prosperi). 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) Sept.26 5 34.46 41 35.8 1.039 1.532 97 13.3 4:26 (233, 78) Oct. 3 5 48.95 43 18.5 1.026 1.562 100 13.5 4:32 (215, 80) 88P/Howell It brightened up to 9.6 mag in the very low sky in spring (Apr. 14, Chris Wyatt). Now it is 14.1 mag (Sept. 13, Ken-ichi Kadota). 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) Sept.26 3 12.40 14 54.0 1.518 2.319 132 13.4 2:55 ( 0, 70) Oct. 3 3 7.60 14 41.7 1.503 2.365 140 13.6 2:23 ( 0, 70) C/2024 J3 ( ATLAS ) Now it is 13.9 mag (Sept. 15, Thomas Lehmann). 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) Sept.26 18 26.28 42 17.4 3.704 3.901 93 13.6 19:15 (123, 75) Oct. 3 18 25.81 41 55.7 3.748 3.894 90 13.6 19:05 (119, 72) C/2026 A2 ( Bok ) Now it is 13.7 mag (Sept. 19, Mike Olason). Brightening slowly. 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) Sept.26 17 41.55 70 12.0 1.996 2.211 88 14.0 19:15 (165, 52) Oct. 3 18 8.59 68 12.0 1.910 2.172 91 13.8 19:05 (164, 54) 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. Brightening rapidly. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in October. But it will be observable again in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 10 8.06 5 19.9 1.903 1.163 30 14.5 4:26 (271, 10) Oct. 3 10 36.42 3 3.4 1.862 1.119 30 13.9 4:32 (273, 10) 29P/Schwassmann-Wachmann 1 Now it is 13.6 mag (Aug. 2, Andrew Pearce). 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) Sept.26 12 0.82 -6 55.1 7.314 6.318 6 14.3 4:26 (265,-20) Oct. 3 12 5.57 -7 28.9 7.307 6.318 8 14.3 4:32 (269,-14) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. Now it is 13.9 mag (Aug. 16, Thomas Lehmann). 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) Sept.26 7 32.13 -71 24.6 13.680 13.587 82 14.5 4:26 (347,-20) Oct. 3 7 35.97 -71 51.3 13.674 13.566 81 14.5 4:32 (349,-20) C/2024 R4 ( PanSTARRS ) Now it is 14.5 mag (Sept. 22, 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) Sept.26 20 3.64 47 50.7 5.020 5.438 109 14.6 19:42 (180, 77) Oct. 3 19 57.07 47 7.2 5.033 5.406 106 14.5 19:09 (180, 78) 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 in October 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) Sept.26 15 27.17 -17 16.5 4.420 3.872 51 14.7 19:15 ( 59, 11) Oct. 3 15 27.46 -17 52.6 4.546 3.897 44 14.8 19:05 ( 62, 8) 123P/West-Hartley It stays 15 mag for a while. 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 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 11 8.77 16 46.0 3.044 2.159 23 14.9 4:26 (253, 5) Oct. 3 11 23.59 15 10.8 3.017 2.160 25 14.9 4:32 (257, 7) 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) Sept.26 12 46.21 -10 52.4 3.093 2.131 13 15.3 19:15 ( 88,-16) Oct. 3 13 0.32 -12 56.9 3.130 2.157 11 15.4 19:05 ( 86,-18) 112P/Urata-Niijima Now it is 16.5 mag (Sept. 19, Mike Olason). Fading slowly. 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) Sept.26 6 42.99 35 25.7 1.151 1.442 83 15.5 4:26 (261, 66) Oct. 3 7 8.32 37 43.4 1.123 1.446 85 15.3 4:32 (255, 68) (3200) Phaethon Parent object of Geminids meteor shower. It approached to Sun down to 0.14 a.u. on Sept. 2. It brightens up to 15 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in December. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 13 14.84 35 9.4 0.430 0.723 39 16.5 19:15 (122, 17) Oct. 3 14 32.65 47 57.3 0.376 0.861 57 15.5 19:05 (130, 32) 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 November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 11 6.55 26 38.5 6.965 6.132 31 15.6 4:26 (245, 11) Oct. 3 11 12.71 26 29.0 6.935 6.155 36 15.6 4:32 (248, 16) 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) Sept.26 13 36.04 -1 25.6 5.541 4.624 21 15.9 19:15 ( 89, -1) Oct. 3 13 42.69 -2 0.9 5.519 4.572 17 15.8 19:05 ( 90, -3) C/2025 V2 ( Rankin ) It is expected to brighten up to 12.5 mag in 2027 spring. Brightening gradually. Now it is not observable. It will appear in January in the Southern Hemisphere, or in October in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 11 49.33 17 16.0 3.801 2.871 18 16.0 4:26 (247, -3) Oct. 3 12 1.73 16 41.3 3.718 2.815 21 15.8 4:32 (250, 1) C/2022 N2 ( PanSTARRS ) Now it is 15.9 mag (Sept. 1, ATLAS-HKO, Haleakala). 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) Sept.26 7 22.71 25 39.5 5.437 5.249 73 15.9 4:26 (274, 55) Oct. 3 7 26.45 25 33.5 5.369 5.288 80 15.9 4:32 (280, 61) 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). It stays 16 mag for a while. 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) Sept.26 18 49.15 -21 23.6 4.686 4.941 98 16.0 19:15 ( 13, 33) Oct. 3 18 45.27 -21 25.9 4.767 4.890 91 16.0 19:05 ( 18, 31) C/2021 G2 ( ATLAS ) Now it is 15.7 mag (Sept. 22, 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 17 5.79 13 7.9 7.638 7.437 74 16.2 19:15 ( 66, 50) Oct. 3 17 8.42 12 49.4 7.757 7.473 69 16.2 19:05 ( 69, 47) 114P/Wiseman-Skiff Now it is 16.4 mag (Sept. 19, Mike Olason). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. 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) Sept.26 8 24.32 19 23.6 1.840 1.575 58 16.3 4:26 (273, 39) Oct. 3 8 42.32 17 4.6 1.803 1.581 60 16.3 4:32 (278, 41) 11P/Tempel-Swift-LINEAR Now it is 17.3 mag (Sept. 14, Roland Fichtl). It will brighten rapidly after this. 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) Sept.26 1 48.44 39 33.5 0.580 1.473 135 17.5 1:31 (180, 85) Oct. 3 1 58.91 39 35.5 0.535 1.449 139 16.3 1:14 (180, 85) 84P/Giclas Now it is 16.7 mag (Sept. 9, 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) Sept.26 20 16.71 -26 30.3 1.475 2.134 117 16.6 19:57 ( 0, 29) Oct. 3 20 19.94 -26 25.2 1.514 2.099 111 16.5 19:33 ( 0, 29) C/2025 J1 ( Borisov ) Now it is 17.9 mag (Sept. 17, Kunihiro Shima). It stays 17 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) Sept.26 7 15.66 14 36.8 3.852 3.707 74 16.6 4:26 (291, 50) Oct. 3 7 15.76 13 1.8 3.749 3.724 80 16.6 4:32 (302, 55) C/2026 AZ17 ( Bok ) Now it is 16.7 mag (Sept. 5, 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) Sept.26 17 14.50 4 52.5 2.592 2.550 76 16.7 19:15 ( 55, 46) Oct. 3 17 24.99 2 59.8 2.640 2.533 72 16.7 19:05 ( 55, 43) 65P/Gunn Now it is 17.7 mag (Sept. 10, Andrew Pearce). Fading slowly. It will be fainter than 18 mag in January. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 0 32.81 -8 12.5 2.629 3.618 169 16.7 0:16 ( 0, 47) Oct. 3 0 28.01 -8 33.3 2.650 3.634 167 16.7 23:39 ( 0, 47) 2P/Encke It will brighten up to 6-7 mag from January to February. Now it is 17.0 mag (Sept. 20, Alfons Diepvens). It will brighten rapidly after this. 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 January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 1 0.30 20 21.7 1.243 2.201 156 17.0 0:44 ( 0, 76) Oct. 3 0 46.46 19 56.9 1.153 2.131 163 16.7 0:03 ( 0, 75) 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) Sept.26 7 34.57 -24 45.4 2.992 2.817 70 16.7 4:26 (320, 18) Oct. 3 7 31.37 -26 13.2 2.990 2.908 75 16.9 4:32 (328, 21) 493P/2024 Q2 ( LONEOS ) Now it is 17.6 mag (May 18, Kunihiro Shima). 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 appear in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 9 39.67 32 40.9 4.702 4.111 48 17.1 4:26 (249, 30) Oct. 3 9 47.46 32 11.2 4.642 4.126 53 17.1 4:32 (252, 35) 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) Sept.26 11 38.86 -75 11.6 4.151 3.998 74 17.1 4:26 (342,-37) Oct. 3 12 7.82 -76 42.3 4.174 3.999 73 17.1 4:32 (344,-37) 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 slowly. It will be fainter than 18 mag in December. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 2 5.49 26 37.7 1.264 2.146 142 17.3 1:48 ( 0, 82) Oct. 3 2 4.26 25 30.1 1.233 2.156 149 17.3 1:20 ( 0, 81) C/2025 A1 ( Lemmon ) Now it is 17.5 mag (June 9, C. Demeautis). 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) Sept.26 10 49.42 30 52.3 6.252 5.486 37 17.4 4:26 (243, 16) Oct. 3 10 56.84 30 39.6 6.183 5.475 41 17.3 4:32 (247, 21) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 17.3 mag (Sept. 5, Toru Yusa). 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) Sept.26 21 59.86 26 10.5 6.361 7.158 139 17.4 21:39 ( 0, 81) Oct. 3 21 55.60 25 10.0 6.446 7.202 136 17.4 21:07 ( 0, 80) 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) Sept.26 20 1.42 -5 13.0 4.568 5.113 117 17.4 19:41 ( 0, 50) Oct. 3 20 2.88 -5 55.8 4.677 5.129 111 17.5 19:15 ( 0, 49) C/2019 E3 ( ATLAS ) Very far object. It stays 18 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) Sept.26 0 10.94 -45 21.9 10.988 11.703 133 17.4 23:50 ( 0, 10) Oct. 3 0 7.15 -45 16.4 11.044 11.720 130 17.4 23:18 ( 0, 10) 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. Fading rapidly. It will be fainter than 18 mag in October. It will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 11 34.69 8 37.9 1.632 0.692 12 17.4 4:26 (256, -5) Oct. 3 11 31.69 5 4.5 1.732 0.839 18 18.4 4:32 (264, 0) 93P/Lovas 1 It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be unobservable temporarily in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.26 9 41.77 19 44.3 2.871 2.224 41 17.5 4:26 (262, 24) Oct. 3 9 53.96 18 32.0 2.854 2.266 45 17.6 4:32 (266, 27) 188P/LINEAR-Mueller Now it is 17.9 mag (Aug. 24, W. Hasubick). 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) Sept.26 6 8.94 34 11.7 2.587 2.786 90 17.5 4:26 (267, 72) Oct. 3 6 15.58 34 39.1 2.517 2.804 96 17.5 4:32 (268, 78) C/2025 B2 ( Borisov ) Now it is 17.3 mag (Sept. 4, 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) Sept.26 16 48.61 75 42.5 8.246 8.239 86 17.6 19:15 (166, 45) Oct. 3 16 54.91 74 32.7 8.228 8.240 87 17.6 19:05 (164, 45) 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 will be getting lower gradually. But it will be getting higher again after November. 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) Sept.26 14 51.55 56 20.8 5.819 5.488 66 17.7 19:15 (138, 39) Oct. 3 14 59.43 54 55.6 5.842 5.508 65 17.7 19:05 (136, 37) 235P/LINEAR It became brighter than expected. It was observed at 13 mag from winter to spring. Now it is 17.5 mag (Sept. 5, P.-J. Dekelver.). Fading gradually. It will be fainter than 18 mag in October. 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) Sept.26 17 25.76 -13 30.3 2.832 2.821 79 17.8 19:15 ( 38, 33) Oct. 3 17 34.41 -13 52.7 2.951 2.852 74 18.0 19:05 ( 40, 31) 346P/Catalina 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) Sept.26 8 14.69 18 33.0 2.575 2.263 60 17.9 4:26 (275, 41) Oct. 3 8 27.55 18 39.1 2.514 2.275 64 17.8 4:32 (279, 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 17.4 mag (Aug. 24, Hidenori Nohara). 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) Sept.26 1 41.19 -1 58.3 3.972 4.910 156 17.9 1:24 ( 0, 53) Oct. 3 1 35.53 -1 53.6 3.887 4.856 163 17.8 0:51 ( 0, 53) 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 17.4 mag (Sept. 7, Toru Yusa). It will fade out rapidly after this. It will be fainter than 18 mag in October. 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) Sept.26 5 6.21 47 37.4 0.605 1.269 101 17.9 4:26 (197, 77) Oct. 3 5 4.83 48 7.5 0.621 1.328 107 18.1 4:20 (180, 77) 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) Sept.26 8 8.49 10 58.1 2.618 2.306 61 18.0 4:26 (285, 38) Oct. 3 8 20.11 9 43.0 2.551 2.310 64 17.9 4:32 (290, 41)