Weekly Information about Bright Comets (2024 Sept. 21: North)

Japanese version Home page	Updated on September 25, 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. Now it is 3.1 mag (Sept. 23, Virgilio Gonano). It will turn to fade out rapidly after the peak. It will be unobservable temporarily around Oct. 10. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 10 35.45 -5 55.5 1.191 0.432 20 3.6 4:52 (277, 0) Sept.28 10 47.87 -6 2.8 0.897 0.391 22 2.7 4:58 (281, 4) 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. 19, Virgilio Gonano). 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 14 15.09 9 6.6 2.395 1.693 36 9.5 19:22 ( 90, 16) Sept.28 14 32.51 6 7.5 2.496 1.763 34 9.9 19:12 ( 87, 14) 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.21 13 20.33 -47 32.7 3.013 2.521 51 11.3 19:22 ( 48,-26) Sept.28 13 38.68 -47 32.4 3.154 2.605 48 11.6 19:12 ( 48,-25) 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.21 7 37.60 48 15.4 3.843 3.667 72 12.2 4:22 (234, 52) Sept.28 7 36.52 50 1.0 3.722 3.668 79 12.1 4:28 (230, 57) C/2023 R2 ( PanSTARRS ) It will fade out rapidly after this. In the Northern Hemisphere, it will be unobservable in December. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 13 22.08 0 54.5 2.012 1.147 22 12.6 19:22 ( 91, 0) Sept.28 13 50.69 0 9.2 2.079 1.223 23 13.0 19:12 ( 88, 2) C/2023 C2 ( ATLAS ) Now it is 13.1 mag (Aug. 29, Chris Wyatt). It stays 13 mag for a while. 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.21 17 7.19 -40 59.7 2.384 2.452 81 12.8 19:22 ( 25, 8) Sept.28 17 19.80 -38 46.2 2.447 2.433 77 12.8 19:12 ( 27, 9) C/2024 B1 ( Lemmon ) It became much brighter than expected. Now it is 13.8 mag (Sept. 8, Michael Jager). Fading 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 10 41.94 49 51.9 2.076 1.649 51 13.6 4:22 (225, 23) Sept.28 11 22.99 49 40.6 2.033 1.639 53 13.5 4:28 (224, 22) 37P/Forbes Now it is 13.9 mag (Sept. 20, Mike Olason). 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.21 15 46.09 -25 17.3 1.841 1.630 61 13.8 19:22 ( 48, 11) Sept.28 16 7.27 -25 43.7 1.876 1.623 59 13.8 19:12 ( 47, 11) 29P/Schwassmann-Wachmann 1 Now it is 16.5 mag (Sept. 20, 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.21 9 42.24 12 52.3 7.032 6.232 34 14.2 4:22 (265, 15) Sept.28 9 46.60 12 25.5 6.963 6.234 40 14.2 4:28 (269, 21) 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.21 13 19.49 -18 49.4 5.839 4.983 28 14.3 19:22 ( 75,-12) Sept.28 13 26.68 -18 50.8 5.885 4.984 23 14.3 19:12 ( 76,-14) 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.21 22 43.68 -4 57.4 3.724 4.689 162 14.6 22:41 ( 0, 50) Sept.28 22 41.13 -5 8.4 3.730 4.656 154 14.5 22:11 ( 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.21 19 27.36 48 56.2 2.794 3.199 104 14.8 19:25 (180, 76) Sept.28 19 32.06 47 1.4 2.883 3.272 103 14.9 19:12 (172, 78) C/2022 QE78 ( ATLAS ) Now it is 15.7 mag (Sept. 1, Hiroshi Abe). It stays 14 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.21 6 37.60 3 12.9 6.172 6.059 78 14.9 4:22 (308, 45) Sept.28 6 40.34 3 8.4 6.048 6.038 84 14.8 4:28 (317, 50) 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.21 21 55.97 -70 44.0 5.182 5.566 107 15.0 21:53 ( 0,-16) Sept.28 21 39.81 -70 23.6 5.311 5.622 103 15.1 21:09 ( 0,-15) 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 unobservable in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 13 48.23 -49 39.9 2.921 2.503 56 15.3 19:22 ( 44,-22) Sept.28 13 57.97 -48 35.7 2.893 2.397 51 15.1 19:12 ( 46,-23) 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). It will fade out rapidly after this. 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.21 14 23.61 16 48.2 2.713 2.054 40 15.1 19:22 ( 96, 21) Sept.28 14 35.66 14 0.2 2.839 2.134 37 15.5 19:12 ( 94, 19) 130P/McNaught-Hughes Now it is 14.9 mag (Sept. 4, Ken-ichi Kadota). It will fade out rapidly after this. 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.21 2 40.83 8 7.2 1.405 2.248 137 15.3 2:41 ( 0, 63) Sept.28 2 37.46 7 55.1 1.386 2.279 144 15.4 2:11 ( 0, 63) 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.21 6 26.75 17 49.9 6.906 6.836 81 15.4 4:22 (294, 57) Sept.28 6 26.82 18 0.9 6.842 6.891 88 15.4 4:28 (304, 64) 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). 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 December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 4 39.72 8 47.2 1.262 1.840 108 15.7 4:22 (350, 63) Sept.28 4 44.12 11 36.6 1.183 1.830 113 15.5 4:17 ( 0, 67) 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.21 4 21.95 -67 55.3 15.745 15.935 99 15.5 4:21 ( 0,-13) Sept.28 4 21.18 -68 23.4 15.732 15.911 98 15.5 3:53 ( 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.21 10 33.80 11 39.6 2.727 1.840 22 15.6 4:22 (259, 4) Sept.28 10 51.11 10 16.6 2.712 1.852 24 15.6 4:28 (262, 7) 154P/Brewington Now it is 15.4 mag (Sept. 4, Ken-ichi Kadota). 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.21 8 12.37 35 16.7 2.160 1.903 61 15.6 4:22 (252, 44) Sept.28 8 27.91 34 45.1 2.141 1.946 65 16.3 4:28 (254, 47) 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.21 9 55.66 -27 42.4 4.048 3.343 40 15.7 4:22 (297,-11) Sept.28 9 55.84 -28 45.7 4.044 3.384 43 15.7 4:28 (302, -5) 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.21 5 51.05 57 36.6 2.497 2.686 89 15.8 4:22 (207, 63) Sept.28 6 8.31 59 24.5 2.418 2.666 93 15.7 4:28 (201, 63) 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.21 5 43.20 18 10.7 1.101 1.517 92 15.7 4:22 (308, 65) Sept.28 5 54.67 20 31.6 1.074 1.547 96 15.9 4:28 (314, 71) 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.21 6 47.28 -26 32.4 1.790 1.866 78 16.0 4:22 (326, 20) Sept.28 6 51.15 -25 35.2 1.684 1.832 81 15.8 4:28 (332, 24) 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.21 6 19.75 14 43.8 3.389 3.423 83 16.1 4:22 (300, 57) Sept.28 6 25.44 14 15.8 3.301 3.430 88 16.1 4:28 (310, 61) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 15.1 mag (Aug. 2, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it will never be observable after this. 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.21 11 43.87 -47 33.3 9.361 8.725 48 16.1 4:22 (307,-38) Sept.28 11 48.94 -47 57.0 9.431 8.770 46 16.2 4:28 (309,-34) 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.21 7 58.63 25 58.1 3.108 2.777 61 16.3 4:22 (266, 43) Sept.28 8 9.23 25 24.8 3.013 2.764 66 16.2 4:28 (269, 47) C/2019 U5 ( PanSTARRS ) Now it is 15.5 mag (Sept. 5, ATLAS Chile). 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.21 7 56.11 -39 28.3 6.202 5.887 67 16.3 4:22 (322, 1) Sept.28 7 55.64 -40 33.8 6.191 5.931 70 16.4 4:28 (327, 4) 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.21 7 0.10 -26 29.9 7.132 6.948 75 16.4 4:22 (323, 18) Sept.28 7 2.97 -26 58.1 7.051 6.933 79 16.4 4:28 (330, 21) 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.21 8 7.57 -25 58.5 4.911 4.503 60 16.5 4:22 (311, 9) Sept.28 8 10.65 -26 4.8 4.820 4.473 64 16.4 4:28 (316, 13) 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 will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 20 57.78 -8 37.2 1.533 2.357 135 16.5 20:53 ( 0, 46) Sept.28 20 33.10 -10 26.0 1.664 2.360 122 16.6 20:02 ( 0, 45) 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.21 7 0.63 -37 47.9 5.660 5.525 77 16.5 4:22 (329, 8) Sept.28 7 1.15 -38 19.1 5.653 5.574 80 16.5 4:28 (335, 11) 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.21 16 18.44 -22 48.2 3.469 3.240 68 16.5 19:22 ( 44, 17) Sept.28 16 27.20 -22 53.0 3.565 3.248 63 16.6 19:12 ( 46, 16) 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 stays extremely 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.21 13 26.71 -39 18.0 5.946 5.290 45 16.6 19:22 ( 56,-21) Sept.28 13 28.34 -39 14.5 6.001 5.280 40 16.6 19:12 ( 57,-24) 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.21 0 55.00 -0 36.2 1.055 2.040 164 16.8 0:56 ( 0, 55) Sept.28 0 51.97 -1 24.0 1.039 2.035 170 16.7 0:25 ( 0, 54) 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.21 2 25.43 -69 19.6 10.110 10.446 106 16.7 2:25 ( 0,-14) Sept.28 2 16.82 -69 32.8 10.136 10.452 105 16.7 1:49 ( 0,-14) 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.21 23 25.21 -20 34.2 1.598 2.560 159 16.8 23:22 ( 0, 35) Sept.28 23 19.98 -20 18.7 1.648 2.584 153 17.0 22:49 ( 0, 35) 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.21 19 19.72 34 36.8 4.058 4.460 107 16.8 19:22 ( 68, 89) Sept.28 19 14.43 32 25.7 4.149 4.480 102 16.9 19:12 ( 67, 84) 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.21 7 49.73 12 40.0 5.244 4.845 61 16.9 4:22 (282, 38) Sept.28 7 54.35 11 49.3 5.153 4.851 67 16.8 4:28 (289, 43) 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.21 23 10.52 30 26.3 5.188 6.056 147 16.9 23:07 ( 0, 86) Sept.28 23 2.35 29 42.8 5.147 6.012 146 16.8 22:31 ( 0, 85) 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.21 2 22.27 21 50.8 2.447 3.256 137 17.1 2:23 ( 0, 77) Sept.28 2 20.14 21 39.3 2.360 3.228 144 17.0 1:53 ( 0, 77) 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 18 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.21 17 17.92 27 43.0 7.826 7.747 81 17.0 19:22 ( 84, 62) Sept.28 17 20.27 27 10.1 7.934 7.788 78 17.1 19:12 ( 85, 59) 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.21 0 7.89 -27 37.5 1.527 2.463 152 17.1 0:09 ( 0, 28) Sept.28 0 1.43 -28 51.5 1.502 2.416 148 17.0 23:30 ( 0, 26) 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.21 22 43.81 -7 7.5 1.201 2.177 161 17.2 22:41 ( 0, 48) Sept.28 22 40.36 -7 18.3 1.211 2.156 153 17.1 22:10 ( 0, 48) 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.21 6 53.22 32 15.2 2.023 2.045 76 17.1 4:22 (264, 59) Sept.28 7 3.83 33 27.8 1.996 2.100 81 17.3 4:28 (264, 64) 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.21 3 59.20 42 17.7 1.352 1.942 110 17.2 4:00 (180, 83) Sept.28 4 5.02 44 10.8 1.316 1.960 114 17.3 3:38 (180, 81) 302P/Lemmon-PanSTARRS Now it is 17.4 mag (Sept. 6, ATLAS South Africa). It stays 18 mag for a while. 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.21 18 57.07 -22 34.0 2.974 3.376 104 17.2 19:22 ( 7, 32) Sept.28 19 0.68 -22 37.8 3.064 3.369 98 17.3 19:12 ( 11, 32) 338P/McNaught Now it is 17.5 mag (Sept. 9, ATLAS-HKO, Haleakala). Fading gradually. 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.21 2 48.19 30 0.6 1.555 2.315 128 17.4 2:49 ( 0, 85) Sept.28 2 44.96 31 47.9 1.509 2.324 134 17.4 2:18 ( 0, 87) 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.21 4 20.80 -7 46.4 3.494 3.994 112 17.5 4:21 ( 0, 47) Sept.28 4 21.89 -8 51.9 3.416 3.991 118 17.4 3:54 ( 0, 46) C/2022 S4 ( Lemmon ) It has started fading before the perihelion passage. Now it is 17.0 mag (Aug. 11, Thomas Lehmann). It stays 18 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) Sept.21 11 24.71 -64 28.3 3.107 2.840 65 17.4 4:22 (329,-38) Sept.28 11 54.66 -63 59.8 3.185 2.858 62 17.5 4:28 (328,-37) 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.21 16 6.14 -7 37.8 3.189 2.886 63 17.4 19:22 ( 58, 27) Sept.28 16 15.63 -8 14.8 3.270 2.890 59 17.5 19:12 ( 59, 25) C/2024 L5 ( ATLAS ) Now it is 17.1 mag (Sept. 4, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in December. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in November. But it will be observable again in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 15 3.53 -29 12.8 4.282 3.786 54 17.4 19:22 ( 52, 1) Sept.28 15 3.27 -28 57.4 4.362 3.759 47 17.4 19:12 ( 55, -2) 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.21 21 26.04 13 51.9 0.661 1.572 140 17.7 21:23 ( 0, 69) Sept.28 21 27.68 13 2.4 0.650 1.539 136 17.5 20:58 ( 0, 68) 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.21 16 12.39 -16 40.3 2.581 2.361 66 17.6 19:22 ( 50, 21) Sept.28 16 23.22 -17 37.8 2.631 2.335 62 17.5 19:12 ( 50, 19) 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. 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.21 20 32.10 18 27.4 4.764 5.428 127 17.5 20:29 ( 0, 73) Sept.28 20 26.55 17 36.8 4.890 5.475 121 17.6 19:56 ( 0, 73) C/2021 S4 ( Tsuchinshan ) Now it is 17.6 mag (Apr. 11, Mt. Lemmon Survey). 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) Sept.21 7 25.96 38 58.7 7.152 6.903 71 17.6 4:22 (250, 53) Sept.28 7 29.94 39 6.0 7.061 6.914 77 17.5 4:28 (251, 59) 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.21 18 22.07 -37 21.9 7.326 7.500 96 17.6 19:22 ( 13, 16) Sept.28 18 22.07 -36 48.6 7.397 7.457 89 17.6 19:12 ( 16, 16) 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 will be unobservable in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.21 8 35.21 35 1.5 2.617 2.242 57 17.6 4:22 (251, 39) Sept.28 8 49.37 34 29.9 2.582 2.272 61 17.6 4:28 (253, 43) 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.21 7 48.48 31 11.2 2.089 1.902 65 17.7 4:22 (260, 47) Sept.28 8 5.24 30 56.4 2.056 1.928 68 17.7 4:28 (262, 50) 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.21 3 38.77 17 2.6 3.830 4.441 121 17.7 3:39 ( 0, 72) Sept.28 3 37.36 17 1.8 3.756 4.454 128 17.7 3:10 ( 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.21 3 14.58 15 34.5 3.220 3.916 127 17.9 3:15 ( 0, 71) Sept.28 3 13.91 15 8.6 3.142 3.913 134 17.9 2:47 ( 0, 70)