Weekly Information about Bright Comets (2024 Sept. 28: South)

Japanese version Home page	Updated on October 3, 2024
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

C/2023 A3 ( Tsuchinshan-ATLAS ) Brightening very rapidly. Now it is very bright as 1.5 mag (Oct. 2, Willian Souza). It will be unobservable soon. But it will be observable again in mid October. J. N. Marcus predicted the comet will brighten up to -4 mag at best on Oct. 9 due to the forward scattering. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 10 47.87 -6 2.8 0.897 0.391 22 2.7 4:45 (271, 9) Oct. 5 11 42.85 -4 51.8 0.614 0.438 15 2.3 4:35 (276, 1) 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 9.3 mag (Sept. 25, Virgilio Gonano). It will fade out rapidly after this. It will be unobservable soon 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.28 14 32.51 6 7.5 2.496 1.763 34 9.5 19:25 (100, 4) Oct. 5 14 48.95 3 22.5 2.601 1.835 32 9.9 19:32 ( 95, 2) 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.28 13 38.68 -47 32.4 3.154 2.605 48 11.6 19:25 ( 47, 23) Oct. 5 13 55.95 -47 31.7 3.292 2.688 45 11.8 19:32 ( 45, 20) 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.28 7 36.52 50 1.0 3.722 3.668 79 12.1 4:15 (206, -3) Oct. 5 7 33.90 51 57.3 3.601 3.671 86 12.0 4:05 (203, -3) C/2024 S1 ( ATLAS ) Bright new Kreutz sungrazer comet. It will approach to Sun down to 0.008 a.u. on Oct. 28. It is expected to brighten up to 2 mag, or -4.5 mag at best. Now it is 11.8 mag (Sept. 30, Chris Wyatt). It will be unobservable soon. But it will be observable again in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 9 6.90 -11 46.2 1.422 1.066 48 13.0 4:15 (266, 27) Oct. 5 9 40.91 -14 4.2 1.226 0.894 45 12.1 4:05 (271, 24) 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.28 17 19.80 -38 46.2 2.447 2.433 77 12.8 19:25 ( 72, 59) Oct. 5 17 32.53 -36 36.9 2.513 2.416 72 12.8 19:32 ( 74, 55) C/2023 R2 ( PanSTARRS ) It will fade out rapidly after this. In the Northern Hemisphere, it will be unobservable in December. 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.28 13 50.69 0 9.2 2.079 1.223 23 13.0 19:25 ( 90, -1) Oct. 5 14 17.69 -0 32.9 2.154 1.303 23 13.3 19:32 ( 88, -2) 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.28 11 22.99 49 40.6 2.033 1.639 53 13.5 4:15 (229,-32) Oct. 5 12 4.16 48 47.8 2.004 1.634 54 13.4 4:05 (231,-35) 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.28 16 7.27 -25 43.7 1.876 1.623 59 13.8 19:25 ( 84, 41) Oct. 5 16 29.04 -26 1.6 1.913 1.619 57 13.8 19:32 ( 83, 39) 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.28 9 46.60 12 25.5 6.963 6.234 40 14.2 4:15 (252, 4) Oct. 5 9 50.73 11 59.2 6.886 6.235 46 14.2 4:05 (250, 7) 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 soon. But it will be observable again in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 13 26.68 -18 50.8 5.885 4.984 23 14.3 19:25 ( 70, 5) Oct. 5 13 33.95 -18 53.5 5.923 4.986 18 14.3 19:32 ( 67, 0) 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.28 22 41.13 -5 8.4 3.730 4.656 154 14.5 22:11 (180, 60) Oct. 5 22 38.95 -5 17.7 3.750 4.623 147 14.5 21:41 (180, 60) 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.28 6 40.34 3 8.4 6.048 6.038 84 14.8 4:15 (222, 43) Oct. 5 6 42.64 3 3.9 5.923 6.017 90 14.8 4:05 (218, 45) C/2024 G3 ( ATLAS ) It approaches to Sun down to 0.09 a.u. on Jan. 13. 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. But it will be observable again in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 13 57.97 -48 35.7 2.893 2.397 51 15.1 19:25 ( 47, 26) Oct. 5 14 8.21 -47 37.4 2.857 2.288 46 14.9 19:32 ( 46, 22) C/2021 S3 ( PanSTARRS ) It brightened up to 9.6 mag from February to March (Feb. 25, Thomas Lehmann). Now it is 13.7 mag (Sept. 21, Thomas Lehmann). 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.28 19 32.06 47 1.4 2.883 3.272 103 14.9 19:25 (176, 8) Oct. 5 19 37.63 45 9.5 2.977 3.344 102 15.1 19:32 (171, 9) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 15.0 mag (Sept. 7, ATLAS Chile). 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.28 21 39.81 -70 23.6 5.311 5.622 103 15.1 21:09 ( 0, 55) Oct. 5 21 26.18 -69 53.0 5.445 5.678 98 15.2 20:29 ( 0, 55) 487P/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.28 4 44.12 11 36.6 1.183 1.830 113 15.5 4:15 (180, 43) Oct. 5 4 46.87 14 47.5 1.109 1.822 119 15.2 3:52 (180, 40) 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.28 2 37.46 7 55.1 1.386 2.279 144 15.4 2:11 (180, 47) Oct. 5 2 32.76 7 40.1 1.376 2.311 152 15.5 1:38 (180, 47) 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.28 6 26.82 18 0.9 6.842 6.891 88 15.4 4:15 (209, 32) Oct. 5 6 26.37 18 12.4 6.778 6.947 95 15.4 4:05 (205, 33) 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.28 4 21.18 -68 23.4 15.732 15.911 98 15.5 3:53 ( 0, 57) Oct. 5 4 19.87 -68 50.0 15.721 15.887 97 15.5 3:24 ( 0, 56) 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. In the Northern Hemisphere, it will be unobservable in 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.28 14 35.66 14 0.2 2.839 2.134 37 15.5 19:25 (107, 0) Oct. 5 14 47.01 11 27.8 2.963 2.214 34 15.9 19:32 (102, -3) 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 slowly. In the Northern Hemisphere, it will be getting higher gradually. 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.28 6 51.15 -25 35.2 1.684 1.832 81 15.8 4:15 (260, 61) Oct. 5 6 53.56 -24 30.8 1.573 1.802 85 15.5 4:05 (255, 63) C/2023 Q1 ( PanSTARRS ) Now it is 16.6 mag (Sept. 21, Thomas Lehmann). 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.28 6 8.31 59 24.5 2.418 2.666 93 15.7 4:15 (191, -6) Oct. 5 6 25.94 61 10.0 2.345 2.648 96 15.6 4:05 (190, -8) 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.28 10 51.11 10 16.6 2.712 1.852 24 15.6 4:15 (263, -7) Oct. 5 11 8.07 8 52.3 2.696 1.866 27 15.7 4:05 (264, -7) 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 be observable soon. 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.28 9 55.84 -28 45.7 4.044 3.384 43 15.7 4:15 (289, 25) Oct. 5 9 55.49 -29 53.6 4.030 3.426 46 15.7 4:05 (288, 29) 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.28 5 54.67 20 31.6 1.074 1.547 96 15.9 4:15 (200, 32) Oct. 5 6 4.60 22 56.8 1.049 1.580 100 16.2 4:05 (197, 30) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 16.3 mag (Sept. 22, Thomas Lehmann). 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.28 6 25.44 14 15.8 3.301 3.430 88 16.1 4:15 (211, 35) Oct. 5 6 30.39 13 46.4 3.214 3.438 94 16.0 4:05 (208, 37) 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.28 8 9.23 25 24.8 3.013 2.764 66 16.2 4:15 (226, 12) Oct. 5 8 19.36 24 50.3 2.917 2.751 70 16.1 4:05 (226, 14) 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.28 11 48.94 -47 57.0 9.431 8.770 46 16.2 4:15 (318, 16) Oct. 5 11 53.96 -48 23.2 9.494 8.814 44 16.2 4:05 (317, 18) 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.28 7 2.97 -26 58.1 7.051 6.933 79 16.4 4:15 (265, 59) Oct. 5 7 5.41 -27 27.1 6.968 6.918 83 16.3 4:05 (263, 62) 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.28 8 27.91 34 45.1 2.141 1.946 65 16.3 4:15 (223, 3) Oct. 5 8 42.17 34 12.6 2.119 1.990 68 16.4 4:05 (223, 4) 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.28 8 10.65 -26 4.8 4.820 4.473 64 16.4 4:15 (273, 45) Oct. 5 8 13.18 -26 12.9 4.722 4.444 67 16.3 4:05 (272, 48) 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.28 7 55.64 -40 33.8 6.191 5.931 70 16.4 4:15 (293, 52) Oct. 5 7 54.50 -41 41.5 6.178 5.975 73 16.4 4:05 (295, 56) 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.28 7 1.15 -38 19.1 5.653 5.574 80 16.5 4:15 (287, 62) Oct. 5 7 0.95 -38 51.3 5.643 5.622 83 16.5 4:05 (288, 66) 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.28 16 27.20 -22 53.0 3.565 3.248 63 16.6 19:25 ( 91, 44) Oct. 5 16 36.37 -22 57.8 3.658 3.257 58 16.7 19:32 ( 87, 39) 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.28 20 33.10 -10 26.0 1.664 2.360 122 16.6 20:02 (180, 65) Oct. 5 20 13.53 -11 49.2 1.818 2.366 110 16.8 19:32 (170, 67) 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.28 0 51.97 -1 24.0 1.039 2.035 170 16.7 0:25 (180, 56) Oct. 5 0 48.47 -2 10.4 1.034 2.031 173 16.7 23:50 (180, 57) 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.28 2 16.82 -69 32.8 10.136 10.452 105 16.7 1:49 ( 0, 56) Oct. 5 2 7.65 -69 40.3 10.167 10.458 104 16.7 1:13 ( 0, 55) 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.28 23 2.35 29 42.8 5.147 6.012 146 16.8 22:31 (180, 25) Oct. 5 22 54.43 28 52.6 5.124 5.968 144 16.8 21:56 (180, 26) 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.28 7 54.35 11 49.3 5.153 4.851 67 16.8 4:15 (233, 25) Oct. 5 7 58.52 10 57.6 5.059 4.856 72 16.8 4:05 (231, 28) 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.28 2 20.14 21 39.3 2.360 3.228 144 17.0 1:53 (180, 33) Oct. 5 2 17.11 21 20.8 2.284 3.201 151 16.9 1:23 (180, 34) 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.28 19 14.43 32 25.7 4.149 4.480 102 16.9 19:25 (171, 22) Oct. 5 19 10.48 30 18.6 4.248 4.500 98 16.9 19:32 (161, 22) 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.28 23 19.98 -20 18.7 1.648 2.584 153 17.0 22:49 (180, 75) Oct. 5 23 15.61 -19 53.7 1.710 2.608 147 17.1 22:17 (180, 75) 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.28 0 1.43 -28 51.5 1.502 2.416 148 17.0 23:30 (180, 84) Oct. 5 23 54.82 -29 50.5 1.488 2.368 143 17.1 22:56 (180, 85) 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.28 22 40.36 -7 18.3 1.211 2.156 153 17.1 22:10 (180, 62) Oct. 5 22 37.99 -7 23.3 1.230 2.136 146 17.0 21:40 (180, 62) 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.28 17 20.27 27 10.1 7.934 7.788 78 17.1 19:25 (144, 18) Oct. 5 17 22.98 26 38.8 8.041 7.829 74 17.1 19:32 (138, 14) 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.28 21 27.68 13 2.4 0.650 1.539 136 17.5 20:58 (180, 42) Oct. 5 21 31.91 12 4.0 0.644 1.509 132 17.2 20:34 (180, 43) 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.28 19 0.68 -22 37.8 3.064 3.369 98 17.3 19:25 (133, 73) Oct. 5 19 5.17 -22 39.5 3.157 3.362 93 17.3 19:32 (119, 68) 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.28 4 5.02 44 10.8 1.316 1.960 114 17.3 3:38 (180, 11) Oct. 5 4 8.85 45 57.0 1.285 1.980 119 17.4 3:14 (180, 9) 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 soon. 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.28 7 3.83 33 27.8 1.996 2.100 81 17.3 4:15 (210, 14) Oct. 5 7 13.26 34 42.5 1.969 2.155 86 17.5 4:05 (208, 14) 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.28 16 23.22 -17 37.8 2.631 2.335 62 17.5 19:25 ( 96, 40) Oct. 5 16 34.82 -18 32.8 2.678 2.309 57 17.3 19:32 ( 92, 36) 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.28 4 21.89 -8 51.9 3.416 3.991 118 17.4 3:54 (180, 64) Oct. 5 4 22.16 -9 58.7 3.346 3.988 123 17.3 3:27 (180, 65) 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.28 2 44.96 31 47.9 1.509 2.324 134 17.4 2:18 (180, 23) Oct. 5 2 39.94 33 28.5 1.473 2.333 140 17.4 1:46 (180, 21) 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.28 16 15.63 -8 14.8 3.270 2.890 59 17.5 19:25 (104, 33) Oct. 5 16 25.53 -8 49.8 3.348 2.895 55 17.5 19:32 (100, 29) 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.28 11 54.66 -63 59.8 3.185 2.858 62 17.5 4:15 (333, 24) Oct. 5 12 21.88 -63 24.9 3.264 2.877 58 17.6 4:05 (333, 23) 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.28 7 29.94 39 6.0 7.061 6.914 77 17.5 4:15 (211, 6) Oct. 5 7 33.45 39 14.7 6.968 6.925 83 17.5 4:05 (209, 8) 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.28 18 22.07 -36 48.6 7.397 7.457 89 17.6 19:25 ( 78, 71) Oct. 5 18 22.61 -36 15.6 7.469 7.413 82 17.6 19:32 ( 78, 64) 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 soon. 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.28 20 26.55 17 36.8 4.890 5.475 121 17.6 19:56 (180, 37) Oct. 5 20 21.93 16 47.1 5.026 5.521 114 17.7 19:32 (178, 38) 492P/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.28 8 5.24 30 56.4 2.056 1.928 68 17.7 4:15 (222, 9) Oct. 5 8 20.99 30 38.9 2.022 1.957 71 17.6 4:05 (222, 9) 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. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 8 49.37 34 29.9 2.582 2.272 61 17.6 4:15 (227, 0) Oct. 5 9 2.62 33 58.2 2.543 2.304 64 17.7 4:05 (226, 1) 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.28 3 37.36 17 1.8 3.756 4.454 128 17.7 3:10 (180, 38) Oct. 5 3 35.18 16 58.8 3.690 4.467 136 17.7 2:41 (180, 38) C/2024 J2 ( Wierzchos ) Now it is 18.1 mag (Sept. 8, J.-G. Bosch). Brightening gradually. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it is not observable now. It will brighten up to 15.5 mag from winter to spring. But it is not observable around the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 14 50.37 39 59.1 3.230 2.771 54 18.0 19:25 (130,-13) Oct. 5 15 3.06 39 24.0 3.166 2.711 54 17.8 19:32 (127,-16) 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.28 3 13.91 15 8.6 3.142 3.913 134 17.9 2:47 (180, 40) Oct. 5 3 12.45 14 39.0 3.073 3.910 142 17.9 2:18 (180, 40) P/2010 A3 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2010. It is expected to brighten up to 15 mag from winter to spring, and it will be observable in excellent condition in the Northern Hemisphere. Now it is fainter than 21.5 mag (Sept. 3, Erwin Schwab). Brightening gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Sept.28 3 8.77 4 19.1 1.571 2.407 137 18.1 2:42 (180, 51) Oct. 5 3 8.01 4 23.7 1.472 2.356 144 17.9 2:13 (180, 51)