Weekly Information about Bright Comets (2024 Sept. 14: North)

Japanese version Home page	Updated on September 16, 2024
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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.

C/2023 A3 ( Tsuchinshan-ATLAS ) It will approach to Sun down to 0.4 a.u. in late September, and it is expected to brighten up to 2 mag. The brightness evolution slowed down since May. But it brightened up to 8.2 mag in mid August (Aug. 12, Thomas Lehmann). Now it is 4.6 mag (Sept. 15, Michael Mattiazzo). It brightens up to 2 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it is not observable now, but it will appear in October. In the Southern Hemisphere, it will be unobservable in early October. But it will be observable again in mid October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 10 36.57 -5 9.3 1.433 0.536 15 4.8 4:47 (272, -7) Sept.21 10 35.45 -5 55.5 1.191 0.432 20 3.6 4:52 (277, 0) 13P/Olbers It returned for the first time in 68 years. It brightened up to 6.2 mag in early summer (July 1, Virgilio Gonano). Now it is 8.8 mag (Sept. 11, Osamu Miyazaki). It will fade out rapidly after this. It will be unobservable in October in the Southern Hemisphere, or in November in the Northern Hemisphere. But it will be observable again in January in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 13 56.52 12 19.5 2.299 1.625 37 9.2 19:33 ( 93, 17) Sept.21 14 15.09 9 6.6 2.395 1.693 36 9.5 19:22 ( 90, 16) 12P/Pons-Brooks It returns for the first time in 70 years. It brightened up to 3.7 mag in early April (Apr. 6, Jose Guilherme Aguiar). Now it is 10.4 mag (Sept. 5, Thomas Lehmann). Fading gradually. In the Northern Hemisphere, it is not observable now. 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.14 13 0.77 -47 31.9 2.871 2.435 54 11.1 19:33 ( 48,-26) Sept.21 13 20.33 -47 32.7 3.013 2.521 51 11.3 19:22 ( 48,-26) C/2022 E2 ( ATLAS ) Now it is 12.9 mag (Sept. 4, Ken-ichi Kadota). It stays 12 mag for a while. 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) Sept.14 7 37.50 46 40.1 3.962 3.666 65 12.2 4:16 (237, 46) Sept.21 7 37.60 48 15.4 3.843 3.667 72 12.2 4:22 (234, 52) C/2023 R2 ( PanSTARRS ) It will fade out rapidly after this. In the Northern Hemisphere, it will be unobservable soon. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 12 51.85 1 41.8 1.955 1.078 20 12.3 19:33 ( 93, -2) Sept.21 13 22.08 0 54.5 2.012 1.147 22 12.6 19:22 ( 91, 0) C/2023 C2 ( ATLAS ) Now it is 13.1 mag (Aug. 29, Chris Wyatt). It stays 13 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in spring. 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) Sept.14 16 54.74 -43 17.8 2.325 2.473 86 12.8 19:33 ( 24, 6) Sept.21 17 7.19 -40 59.7 2.384 2.452 81 12.8 19:22 ( 25, 8) C/2024 B1 ( Lemmon ) It became much brighter than expected. Now it is 13.8 mag (Sept. 8, Michael Jager). Fading slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 10 2.48 49 24.3 2.133 1.664 49 13.7 4:16 (225, 24) Sept.21 10 41.94 49 51.9 2.076 1.649 51 13.6 4:22 (225, 23) 37P/Forbes Now it is 13.8 mag (Aug. 31, Chris Wyatt). Fading gradually. It stays extremely low in the Northern Hemisphere. 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.14 15 25.58 -24 43.6 1.808 1.640 64 13.9 19:33 ( 49, 11) Sept.21 15 46.09 -25 17.3 1.841 1.630 61 13.8 19:22 ( 48, 11) 29P/Schwassmann-Wachmann 1 Now it is 16.3 mag (Sept. 8, Jean-Francois Soulier). 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) Sept.14 9 37.69 13 19.6 7.091 6.230 29 14.2 4:16 (261, 10) Sept.21 9 42.24 12 52.3 7.032 6.232 34 14.2 4:22 (265, 15) C/2021 G2 ( ATLAS ) Now it is 14.1 mag (Aug. 29, Chris Wyatt). It stays 14 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in November. In the Southern Hemisphere, it will be unobservable in October. But it will be observable again in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 13 12.40 -18 49.5 5.785 4.983 33 14.3 19:33 ( 74,-10) Sept.21 13 19.49 -18 49.4 5.839 4.983 28 14.3 19:22 ( 75,-12) C/2022 N2 ( PanSTARRS ) It is expected to brighten up to 13 mag in 2025 autumn, and it will be observable in good condition. Now it is 14.5 mag (Sept. 5, Ken-ichi Kadota). It stays 15 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.14 22 46.49 -4 45.5 3.731 4.723 169 14.6 23:11 ( 0, 50) Sept.21 22 43.68 -4 57.4 3.724 4.689 162 14.6 22:41 ( 0, 50) C/2021 S3 ( PanSTARRS ) It brightened up to 9.6 mag from February to March (Feb. 25, Thomas Lehmann). Now it is 13.3 mag (Sept. 5, Osamu Miyazaki). Fading gradually. 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.14 19 23.65 50 52.2 2.711 3.126 104 14.6 19:48 (180, 74) Sept.21 19 27.36 48 56.2 2.794 3.199 104 14.8 19:25 (180, 76) C/2023 V4 ( Camarasa-Duszanowicz ) It brightened very rapidly up to 10.0 mag in June (June 11, Virgilio Gonano). Now it is 14.1 mag (Sept. 4, Ken-ichi Kadota). Fading rapidly. It will be fainter than 18 mag in November. 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) Sept.14 14 10.71 19 53.1 2.588 1.974 42 14.7 19:33 ( 98, 24) Sept.21 14 23.61 16 48.2 2.713 2.054 40 15.1 19:22 ( 96, 21) C/2022 QE78 ( ATLAS ) Now it is 15.7 mag (Sept. 1, Hiroshi Abe). It stays 15 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.14 6 34.45 3 17.2 6.293 6.080 73 15.0 4:16 (300, 40) Sept.21 6 37.60 3 12.9 6.172 6.059 78 14.9 4:22 (308, 45) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 14.0 mag (Aug. 31, Chris Wyatt). Fading slowly. 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.14 22 14.27 -70 51.2 5.061 5.510 111 14.9 22:38 ( 0,-16) Sept.21 21 55.97 -70 44.0 5.182 5.566 107 15.0 21:53 ( 0,-16) 154P/Brewington Now it is 14.2 mag (Sept. 1, Thomas Lehmann). Fading 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) Sept.14 7 55.58 35 46.1 2.175 1.861 58 15.2 4:16 (250, 41) Sept.21 8 12.37 35 16.7 2.160 1.903 61 15.6 4:22 (252, 44) 130P/McNaught-Hughes Now it is 14.2 mag (Sept. 1, Hiroshi Abe). Fading gradually. 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.14 2 42.68 8 15.0 1.431 2.217 130 15.2 3:11 ( 0, 63) Sept.21 2 40.83 8 7.2 1.405 2.248 137 15.3 2:41 ( 0, 63) C/2024 G3 ( ATLAS ) It approaches to Sun down to 0.09 a.u. on Jan. 13, 2025. According to the calculation, it will brighten up to -1 mag. But probably, it will be disintegrated. At the high light, it may be observable after the perihelion passage only in the Southern Hemisphere. Now it is 15.7 mag (Aug. 31, ATLAS South Africa). It will brighten rapidly after this. In the Northern Hemisphere, it will never be observable after this. 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) Sept.14 13 38.99 -50 50.7 2.942 2.608 61 15.5 19:33 ( 42,-22) Sept.21 13 48.23 -49 39.9 2.921 2.503 56 15.3 19:22 ( 44,-22) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.1 mag (Sept. 4, Ken-ichi Kadota). 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) Sept.14 6 26.19 17 39.4 6.967 6.780 75 15.4 4:16 (286, 51) Sept.21 6 26.75 17 49.9 6.906 6.836 81 15.4 4:22 (294, 57) 146P/Shoemaker-LINEAR Now it is 15.3 mag (Sept. 8, Thomas Lehmann). 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. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 5 30.41 15 52.7 1.127 1.491 88 15.5 4:16 (304, 60) Sept.21 5 43.20 18 10.7 1.101 1.517 92 15.7 4:22 (308, 65) 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 (Sept. 10, Thomas Lehmann). 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) Sept.14 4 22.18 -67 26.2 15.763 15.959 99 15.5 4:16 (357,-13) Sept.21 4 21.95 -67 55.3 15.745 15.935 99 15.5 4:21 ( 0,-13) 30P/Reinmuth 1 Now it is 16.5 mag (Apr. 3, Taras Prystavski). It stays 16 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.14 10 16.17 13 0.4 2.741 1.830 20 15.6 4:16 (256, 2) Sept.21 10 33.80 11 39.6 2.727 1.840 22 15.6 4:22 (259, 4) C/2022 L2 ( ATLAS ) Now it is 15.6 mag (July 24, Thomas Lehmann). It stays 16 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 getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 9 55.05 -26 44.1 4.041 3.302 37 15.6 4:16 (292,-16) Sept.21 9 55.66 -27 42.4 4.048 3.343 40 15.7 4:22 (297,-11) P/2024 N5 ( Siding Spring ) First return of a new periodic comet which brightened up to 16 mag in 2012. It is expected to brighten rapidly up to 14.5 mag in autumn. Now it is 16.6 mag (Sept. 6, E. Cortes). Brightening 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 December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 4 33.96 6 16.2 1.346 1.854 103 16.0 4:16 (337, 59) Sept.21 4 39.72 8 47.2 1.262 1.840 108 15.7 4:22 (350, 63) C/2023 Q1 ( PanSTARRS ) Now it is 16.7 mag (Sept. 6, 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 is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 5 34.27 55 46.9 2.580 2.708 86 15.9 4:16 (213, 62) Sept.21 5 51.05 57 36.6 2.497 2.686 89 15.8 4:22 (207, 63) C/2024 M1 ( ATLAS ) It is expected to brighten up to 13.5 mag, and it will be observable in good condition in winter. Now it is 16.8 mag (Sept. 9, ATLAS Chile). Brightening gradually. 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) Sept.14 6 42.18 -27 25.4 1.891 1.903 75 16.2 4:16 (321, 15) Sept.21 6 47.28 -26 32.4 1.790 1.866 78 16.0 4:22 (326, 20) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 16.1 mag (Sept. 4, ATLAS-HKO, Haleakala). 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) Sept.14 6 13.37 15 10.0 3.477 3.416 78 16.2 4:16 (292, 52) Sept.21 6 19.75 14 43.8 3.389 3.423 83 16.1 4:22 (300, 57) C/2019 U5 ( PanSTARRS ) Now it is 15.5 mag (Sept. 5, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable 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) Sept.14 7 55.98 -38 25.7 6.209 5.844 64 16.3 4:16 (316, -3) Sept.21 7 56.11 -39 28.3 6.202 5.887 67 16.3 4:22 (322, 1) C/2023 TD22 ( Lemmon ) Brightened rapidly. Now it is 16.1 mag (Sept. 5, Ken-ichi Kadota). Fading gradually. 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.14 21 27.65 -6 19.9 1.432 2.357 149 16.3 21:50 ( 0, 49) Sept.21 20 57.78 -8 37.2 1.533 2.357 135 16.5 20:53 ( 0, 46) P/2023 S1 Now it is 16.8 mag (Sept. 3, ATLAS-MLO, Mauna Loa). Brightening 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 winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 7 47.63 26 29.6 3.199 2.791 57 16.4 4:16 (262, 39) Sept.21 7 58.63 25 58.1 3.108 2.777 61 16.3 4:22 (266, 43) C/2022 R6 ( PanSTARRS ) Now it is 16.9 mag (Sept. 9, ATLAS Chile). 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.14 6 56.82 -26 3.1 7.211 6.963 71 16.4 4:16 (317, 14) Sept.21 7 0.10 -26 29.9 7.132 6.948 75 16.4 4:22 (323, 18) 299P/Catalina-PanSTARRS It brightened very rapidly in outburst in late May. Now it is 17.0 mag (Sept. 4, ATLAS Chile). Fading slowly. It will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 16 10.12 -22 43.6 3.371 3.232 73 16.4 19:33 ( 43, 19) Sept.21 16 18.44 -22 48.2 3.469 3.240 68 16.5 19:22 ( 44, 17) 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 16.2 mag (Sept. 10, Thomas Lehmann). 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) Sept.14 6 59.42 -37 18.3 5.664 5.477 74 16.5 4:16 (324, 5) Sept.21 7 0.63 -37 47.9 5.660 5.525 77 16.5 4:22 (329, 8) C/2024 A1 ( ATLAS ) Now it is 17.3 mag (Sept. 5, ATLAS Chile). Brightening slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. 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.14 8 4.00 -25 54.7 4.995 4.533 57 16.6 4:16 (306, 4) Sept.21 8 7.57 -25 58.5 4.911 4.503 60 16.5 4:22 (311, 9) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (Aug. 23, ATLAS South Africa). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in December. 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.14 13 25.34 -39 26.5 5.881 5.300 50 16.6 19:33 ( 54,-18) Sept.21 13 26.71 -39 18.0 5.946 5.290 45 16.6 19:22 ( 56,-21) 89P/Russell 2 Now it is 16.2 mag (Sept. 8, ATLAS Chile). It will fade out rapidly after this. 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.14 23 31.00 -20 39.9 1.559 2.537 162 16.7 23:55 ( 0, 34) Sept.21 23 25.21 -20 34.2 1.598 2.560 159 16.8 23:22 ( 0, 35) C/2019 E3 ( ATLAS ) Very far object. Now it is 17.0 mag (Sept. 1, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. 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.14 2 33.31 -69 1.3 10.091 10.440 107 16.7 3:01 ( 0,-14) Sept.21 2 25.43 -69 19.6 10.110 10.446 106 16.7 2:25 ( 0,-14) 253P/PanSTARRS Now it is 16.9 mag (Sept. 4, Masayoshi Yoshimi). 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.14 0 57.18 0 9.6 1.081 2.047 157 16.8 1:25 ( 0, 55) Sept.21 0 55.00 -0 36.2 1.055 2.040 164 16.8 0:56 ( 0, 55) C/2022 U1 ( Leonard ) Now it is 16.8 mag (Sept. 3, 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 be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 19 26.47 36 49.6 3.980 4.441 111 16.8 19:51 (180, 88) Sept.21 19 19.72 34 36.8 4.058 4.460 107 16.8 19:22 ( 68, 89) C/2022 U3 ( Bok ) 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.14 7 44.67 13 29.5 5.330 4.841 56 16.9 4:16 (277, 33) Sept.21 7 49.73 12 40.0 5.244 4.845 61 16.9 4:22 (282, 38) C/2023 R1 ( PanSTARRS ) Now it is 17.0 mag (Sept. 1, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 23 18.79 31 2.3 5.245 6.101 145 17.0 23:43 ( 0, 86) Sept.21 23 10.52 30 26.3 5.188 6.056 147 16.9 23:07 ( 0, 86) 192P/Shoemaker-Levy 1 Now it is 17.1 mag (Sept. 3, ATLAS-MLO, Mauna Loa). 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.14 6 41.55 31 3.4 2.047 1.992 72 16.9 4:16 (264, 54) Sept.21 6 53.22 32 15.2 2.023 2.045 76 17.1 4:22 (264, 59) C/2019 T4 ( ATLAS ) It brightened up to 11.1 mag in early 2022 (Mar. 31, 2022, F. Kugel, J.-G. Bosch, J. Nicolas). Now it is 16.1 mag (Sept. 2, ATLAS-MLO, Mauna Loa). It stays 17 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.14 17 15.96 28 17.0 7.716 7.706 85 16.9 19:33 ( 82, 65) Sept.21 17 17.92 27 43.0 7.826 7.747 81 17.0 19:22 ( 84, 62) 49P/Arend-Rigaux It will brighten up to 14 mag in 2025 spring. Now it is 17.5 mag (Sept. 4, ATLAS Chile). It stays 17 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.14 0 13.81 -26 12.1 1.564 2.510 154 17.1 0:42 ( 0, 29) Sept.21 0 7.89 -27 37.5 1.527 2.463 152 17.1 0:09 ( 0, 28) 2020 TS2 It approached to Sun down to 0.12 a.u. on Aug. 4. Fading rapidly. In the Northern Hemisphere, it is not observable now. 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.14 3 17.59 -62 34.6 0.266 1.115 107 17.1 3:52 ( 0, -7) Sept.21 0 35.24 -57 13.9 0.368 1.243 122 18.3 0:40 ( 0, -3) 328P/LONEOS-Tucker Now it is 17.0 mag (Sept. 4, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in November. 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.14 3 51.67 40 19.1 1.391 1.926 105 17.1 4:16 (187, 85) Sept.21 3 59.20 42 17.7 1.352 1.942 110 17.2 4:00 (180, 83) 43P/Wolf-Harrington Now it is 17.5 mag (Sept. 5, ATLAS-HKO, Haleakala). 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) Sept.14 2 23.43 21 55.6 2.543 3.283 130 17.3 2:51 ( 0, 77) Sept.21 2 22.27 21 50.8 2.447 3.256 137 17.1 2:23 ( 0, 77) 190P/Mueller Now it is 17.3 mag (Sept. 6, 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) Sept.14 22 48.02 -6 52.6 1.203 2.200 169 17.2 23:12 ( 0, 48) Sept.21 22 43.81 -7 7.5 1.201 2.177 161 17.2 22:41 ( 0, 48) 302P/Lemmon-PanSTARRS Now it is 17.4 mag (Sept. 6, ATLAS South Africa). 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 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.14 18 54.39 -22 28.1 2.886 3.383 111 17.2 19:33 ( 4, 32) Sept.21 18 57.07 -22 34.0 2.974 3.376 104 17.2 19:22 ( 7, 32) C/2022 S4 ( Lemmon ) It has started fading before the perihelion passage. Now it is 17.0 mag (Aug. 11, Thomas Lehmann). Fading slowly. It will be fainter than 18 mag in November. 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) Sept.14 10 52.04 -64 46.7 3.033 2.824 68 17.3 4:16 (329,-38) Sept.21 11 24.71 -64 28.3 3.107 2.840 65 17.4 4:22 (329,-38) 338P/McNaught Now it is 17.5 mag (Sept. 9, ATLAS-HKO, Haleakala). 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.14 2 49.63 28 9.3 1.609 2.308 122 17.4 3:18 ( 0, 83) Sept.21 2 48.19 30 0.6 1.555 2.315 128 17.4 2:49 ( 0, 85) 362P/(457175) 2008 GO98 Now it is 16.1 mag (June 5, Toshiyuki Takahashi). It stays 18 mag for a while. It will be unobservable in November in the Southern Hemisphere, or in December in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 15 57.08 -6 59.1 3.105 2.882 67 17.4 19:33 ( 56, 29) Sept.21 16 6.14 -7 37.8 3.189 2.886 63 17.4 19:22 ( 58, 27) C/2021 X1 ( Maury-Attard ) It brightened up to 14 mag in early 2023 and 2023 autumn. Now it is 17.2 mag (Aug. 27, A. Diepvens). Fading slowly. 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) Sept.14 20 38.55 19 17.6 4.650 5.382 132 17.4 21:03 ( 0, 74) Sept.21 20 32.10 18 27.4 4.764 5.428 127 17.5 20:29 ( 0, 73) C/2024 L5 ( ATLAS ) Now it is 17.1 mag (Sept. 4, ATLAS Chile). It stays 17 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) Sept.14 15 4.45 -29 32.6 4.193 3.814 61 17.4 19:33 ( 50, 4) Sept.21 15 3.53 -29 12.8 4.282 3.786 54 17.4 19:22 ( 52, 1) 242P/Spahr Now it is 18.5 mag (Sept. 6, 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) Sept.14 4 18.93 -6 43.3 3.578 3.998 107 17.5 4:16 (349, 48) Sept.21 4 20.80 -7 46.4 3.494 3.994 112 17.5 4:21 ( 0, 47) C/2021 S4 ( Tsuchinshan ) Now it is 17.6 mag (Apr. 11, Mt. Lemmon Survey). 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.14 7 21.56 38 52.5 7.239 6.891 66 17.6 4:16 (248, 48) Sept.21 7 25.96 38 58.7 7.152 6.903 71 17.6 4:22 (250, 53) 50P/Arend Now it is 17.3 mag (Aug. 29, B. Kumar). It stays 18 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 October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 8 20.19 35 32.0 2.650 2.212 53 17.6 4:16 (248, 36) Sept.21 8 35.21 35 1.5 2.617 2.242 57 17.6 4:22 (251, 39) C/2024 J3 ( ATLAS ) Now it is 17.1 mag (Sept. 3, ATLAS Chile). It stays 17 mag for a while. It will be unobservable in December. It is expected to brighten up to 13 mag in 2026, and it will be observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it locates very low at the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 18 22.64 -37 55.4 7.256 7.543 102 17.6 19:33 ( 9, 16) Sept.21 18 22.07 -37 21.9 7.326 7.500 96 17.6 19:22 ( 13, 16) 48P/Johnson Now it is 17.1 mag (Sept. 5, ATLAS Chile). Brightening gradually. It will be unobservable in December. It will brighten up to 14.5 mag in 2025 spring. But the condition is bad. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 16 2.37 -15 40.8 2.529 2.388 70 17.7 19:33 ( 49, 23) Sept.21 16 12.39 -16 40.3 2.581 2.361 66 17.6 19:22 ( 50, 21) 305P/Skiff It will brighten up to 16 mag and will be observable in good condition in winter. Now it is 18.4 mag (Sept. 10, Michael Jager). Brightening slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.14 21 26.66 14 28.2 0.678 1.609 144 17.9 21:51 ( 0, 70) Sept.21 21 26.04 13 51.9 0.661 1.572 140 17.7 21:23 ( 0, 69) P/2024 O3 ( LINEAR ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 17.8 mag (Sept. 4, M. Zhang, X. Gao). 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.14 7 30.82 31 21.8 2.122 1.877 62 17.8 4:16 (258, 44) Sept.21 7 48.48 31 11.2 2.089 1.902 65 17.7 4:22 (260, 47) 117P/Helin-Roman-Alu 1 Now it is 18.6 mag (Aug. 29, D. Buczynski). 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.14 3 39.41 17 1.2 3.911 4.427 114 17.8 4:07 ( 0, 72) Sept.21 3 38.77 17 2.6 3.830 4.441 121 17.7 3:39 ( 0, 72) 276P/Vorobjov Now it is 17.4 mag (Sept. 7, ATLAS-HKO, Haleakala). 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.14 3 14.43 15 56.4 3.307 3.919 120 18.0 3:42 ( 0, 71) Sept.21 3 14.58 15 34.5 3.220 3.916 127 17.9 3:15 ( 0, 71)