Weekly Information about Bright Comets (2024 Oct. 5: North)

Japanese version Home page	Updated on October 9, 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 ) Now it is very bright as 0.8 mag (Oct. 5, Chris Wyatt). It has a long tail of 10-20 degrees. 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. Hirohisa Sato reported the comet is between -2 and -3 mag in the SOHO LASCO images and STEREO spacecraft images. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 11 42.84 -4 51.8 0.614 0.438 15 0.8 5:03 (277, 1) Oct. 12 13 52.89 -1 28.2 0.473 0.545 12 1.1 18:23 ( 87, 2) 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 in January 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) Oct. 5 14 48.95 3 22.5 2.601 1.835 32 9.9 19:02 ( 85, 12) Oct. 12 15 4.56 0 51.5 2.707 1.907 29 10.3 18:52 ( 84, 10) 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 brightens up to 2 mag, but it will turn to fade out rapidly after that. 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) Oct. 5 9 40.91 -14 4.2 1.226 0.894 45 12.1 4:34 (298, 13) Oct. 12 10 29.27 -16 39.6 1.048 0.704 40 10.9 4:39 (297, 9) 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 11.3 mag (Sept. 23, Jose Guilherme Aguiar). Fading gradually. In the Northern Hemisphere, it is not observable now. 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) Oct. 5 13 55.95 -47 31.7 3.292 2.688 45 11.8 19:02 ( 48,-25) Oct. 12 14 12.26 -47 31.2 3.426 2.771 42 12.0 18:52 ( 48,-26) C/2022 E2 ( ATLAS ) Now it is 12.6 mag (Sept. 30, Hiroshi Abe). 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) Oct. 5 7 33.90 51 57.3 3.601 3.671 86 12.0 4:34 (223, 62) Oct. 12 7 29.28 54 4.2 3.484 3.675 93 12.0 4:39 (212, 66) C/2023 C2 ( ATLAS ) Now it is 13.0 mag (Sept. 20, Taras Prystavski). 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) Oct. 5 17 32.53 -36 36.9 2.513 2.416 72 12.8 19:02 ( 29, 11) Oct. 12 17 45.34 -34 31.4 2.580 2.402 68 12.9 18:52 ( 31, 12) 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) Oct. 5 14 17.69 -0 32.9 2.154 1.303 23 13.3 19:02 ( 87, 4) Oct. 12 14 43.10 -1 10.7 2.237 1.387 24 13.7 18:52 ( 85, 5) C/2024 B1 ( Lemmon ) It became much brighter than expected. Now it is 13.8 mag (Sept. 8, Michael Jager). Fading gradually. It stays extremely 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) Oct. 5 12 4.16 48 47.8 2.004 1.634 54 13.4 4:34 (224, 20) Oct. 12 12 43.91 47 15.3 1.990 1.635 54 13.4 4:39 (225, 19) 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) Oct. 5 16 29.04 -26 1.6 1.913 1.619 57 13.8 19:02 ( 46, 11) Oct. 12 16 51.25 -26 9.8 1.951 1.618 55 13.9 18:52 ( 46, 12) 29P/Schwassmann-Wachmann 1 Now it is 14.6 mag (Sept. 29, Toshiyuki Takahashi). In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 9 50.73 11 59.2 6.886 6.235 46 14.2 4:34 (274, 27) Oct. 12 9 54.60 11 33.9 6.801 6.237 52 14.1 4:39 (279, 33) C/2021 G2 ( ATLAS ) Now it is 14.1 mag (Aug. 29, Chris Wyatt). It stays 14 mag for a while. Now it is not observable. It will appear in November in the Northern Hemisphere, or in December in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 13 33.95 -18 53.5 5.923 4.986 18 14.3 19:02 ( 77,-16) Oct. 12 13 41.27 -18 57.1 5.952 4.989 13 14.4 18:52 ( 79,-18) 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. 20, 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) Oct. 5 22 38.95 -5 17.7 3.750 4.623 147 14.5 21:41 ( 0, 50) Oct. 12 22 37.25 -5 24.8 3.781 4.590 139 14.5 21:12 ( 0, 50) 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 15.6 mag (Sept. 15, ATLAS Chile). 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) Oct. 5 14 8.21 -47 37.4 2.857 2.288 46 14.9 19:02 ( 47,-24) Oct. 12 14 18.95 -46 44.0 2.811 2.176 42 14.6 18:52 ( 49,-24) C/2022 QE78 ( ATLAS ) Now it is 15.2 mag (Sept. 30, 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) Oct. 5 6 42.64 3 3.9 5.923 6.017 90 14.8 4:34 (328, 54) Oct. 12 6 44.47 2 60.0 5.799 5.996 96 14.7 4:39 (341, 56) 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 15.9 mag (Oct. 2, Catalina Sky Survey). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 4 46.87 14 47.5 1.109 1.822 119 15.2 3:52 ( 0, 70) Oct. 12 4 47.65 18 22.4 1.042 1.817 125 15.0 3:25 ( 0, 73) 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. 27, Hiroshi Abe). 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) Oct. 5 19 37.63 45 9.5 2.977 3.344 102 15.1 19:02 (159, 79) Oct. 12 19 43.93 43 21.8 3.078 3.416 101 15.3 18:52 (144, 79) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 15.0 mag (Sept. 11, 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) Oct. 5 21 26.18 -69 53.0 5.445 5.678 98 15.2 20:29 ( 0,-15) Oct. 12 21 15.17 -69 15.1 5.583 5.733 93 15.3 19:50 ( 0,-14) 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 16.2 mag (Sept. 23, ATLAS South Africa). 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 January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 6 53.56 -24 30.8 1.573 1.802 85 15.5 4:34 (338, 27) Oct. 12 6 54.24 -23 14.5 1.458 1.775 90 15.3 4:39 (346, 30) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.4 mag (Oct. 4, A. Diepvens). 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) Oct. 5 6 26.37 18 12.4 6.778 6.947 95 15.4 4:34 (319, 69) Oct. 12 6 25.40 18 24.5 6.715 7.003 102 15.4 4:39 (341, 73) 130P/McNaught-Hughes Now it is 14.7 mag (Sept. 14, 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) Oct. 5 2 32.76 7 40.1 1.376 2.311 152 15.5 1:38 ( 0, 63) Oct. 12 2 27.01 7 23.4 1.378 2.344 160 15.6 1:05 ( 0, 63) 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) Oct. 5 4 19.87 -68 50.0 15.721 15.887 97 15.5 3:24 ( 0,-14) Oct. 12 4 18.02 -69 14.7 15.713 15.863 96 15.5 2:54 ( 0,-14) C/2023 Q1 ( PanSTARRS ) Now it is 16.3 mag (Oct. 2, D. Buczynski). 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) Oct. 5 6 25.94 61 10.0 2.345 2.648 96 15.6 4:34 (195, 62) Oct. 12 6 43.84 62 52.4 2.276 2.631 99 15.5 4:39 (190, 61) 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) Oct. 5 11 8.07 8 52.3 2.696 1.866 27 15.7 4:34 (266, 9) Oct. 12 11 24.67 7 27.7 2.679 1.882 30 15.7 4:39 (269, 12) C/2022 L2 ( ATLAS ) Now it is 15.6 mag (July 24, Thomas Lehmann). It stays 16 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) Oct. 5 9 55.49 -29 53.6 4.030 3.426 46 15.7 4:34 (307, 0) Oct. 12 9 54.50 -31 5.7 4.006 3.469 51 15.7 4:39 (313, 4) C/2023 V4 ( Camarasa-Duszanowicz ) It brightened very rapidly up to 10.0 mag in June (June 11, Virgilio Gonano). Now it is 14.6 mag (Sept. 14, 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) Oct. 5 14 47.01 11 27.8 2.963 2.214 34 15.9 19:02 ( 92, 16) Oct. 12 14 57.79 9 9.8 3.084 2.295 31 16.2 18:52 ( 92, 13) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 16.1 mag (Oct. 2, ATLAS South Africa). 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) Oct. 5 6 30.39 13 46.4 3.214 3.438 94 16.0 4:34 (323, 65) Oct. 12 6 34.53 13 16.1 3.127 3.446 100 15.9 4:39 (339, 67) P/2023 S1 Now it is 15.6 mag (Sept. 25, ATLAS-HKO, Haleakala). 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) Oct. 5 8 19.36 24 50.3 2.917 2.751 70 16.1 4:34 (274, 52) Oct. 12 8 28.97 24 14.9 2.818 2.739 75 16.0 4:39 (279, 56) 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) Oct. 5 6 4.60 22 56.8 1.049 1.580 100 16.2 4:34 (325, 76) Oct. 12 6 12.74 25 27.3 1.025 1.615 105 16.5 4:39 (346, 80) 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. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 11 53.96 -48 23.2 9.494 8.814 44 16.2 4:34 (311,-29) Oct. 12 11 58.88 -48 51.8 9.548 8.859 44 16.3 4:39 (314,-25) C/2024 A1 ( ATLAS ) Now it is 16.9 mag (Oct. 5, ATLAS South Africa). 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) Oct. 5 8 13.18 -26 12.9 4.722 4.444 67 16.3 4:34 (322, 17) Oct. 12 8 15.09 -26 22.2 4.619 4.415 72 16.3 4:39 (328, 21) C/2022 R6 ( PanSTARRS ) Now it is 16.4 mag (Sept. 18, ATLAS South Africa). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 7 5.41 -27 27.1 6.968 6.918 83 16.3 4:34 (337, 24) Oct. 12 7 7.40 -27 56.5 6.883 6.904 87 16.3 4:39 (344, 25) C/2019 U5 ( PanSTARRS ) Now it is 15.5 mag (Oct. 3, ATLAS South Africa). 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) Oct. 5 7 54.50 -41 41.5 6.178 5.975 73 16.4 4:34 (334, 6) Oct. 12 7 52.62 -42 50.5 6.162 6.018 77 16.4 4:39 (340, 8) 154P/Brewington It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 16.1 mag (Oct. 1, Toshiyuki Takahashi). 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) Oct. 5 8 42.17 34 12.6 2.119 1.990 68 16.4 4:34 (257, 51) Oct. 12 8 55.11 33 41.0 2.094 2.036 72 16.5 4:39 (260, 54) C/2023 H5 ( Lemmon ) It will be observable at 15 mag for a long time in 2025 in the Northern Hemisphere. Brightening slowly. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 11 25.80 23 30.9 5.638 4.841 34 16.5 4:34 (251, 14) Oct. 12 11 31.43 23 58.0 5.545 4.816 39 16.5 4:39 (254, 19) 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 16.8 mag (Oct. 4, ATLAS South Africa). 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) Oct. 5 7 0.95 -38 51.3 5.643 5.622 83 16.5 4:34 (342, 13) Oct. 12 6 59.98 -39 23.4 5.632 5.670 87 16.6 4:39 (349, 14) 253P/PanSTARRS Now it is 16.2 mag (Oct. 5, ATLAS South Africa). 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) Oct. 5 0 48.47 -2 10.4 1.034 2.031 173 16.7 23:50 ( 0, 53) Oct. 12 0 44.91 -2 51.5 1.041 2.028 168 16.7 23:19 ( 0, 52) 299P/Catalina-PanSTARRS It brightened very rapidly in outburst in late May, and brightened up to 14.9 mag (May 19, Taras Prystavski). Now it is 17.2 mag (Oct. 3, ATLAS Chile). It stays 17 mag for a while. It will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 16 36.37 -22 57.8 3.658 3.257 58 16.7 19:02 ( 47, 15) Oct. 12 16 45.90 -23 2.0 3.748 3.265 54 16.8 18:52 ( 49, 13) C/2019 E3 ( ATLAS ) Very far object. Now it is 17.0 mag (Oct. 5, ATLAS Chile). 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) Oct. 5 2 7.65 -69 40.3 10.167 10.458 104 16.7 1:13 ( 0,-15) Oct. 12 1 58.15 -69 41.3 10.203 10.464 102 16.7 0:36 ( 0,-15) 43P/Wolf-Harrington Now it is 16.8 mag (Oct. 4, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 2 17.11 21 20.8 2.284 3.201 151 16.9 1:23 ( 0, 76) Oct. 12 2 13.28 20 55.3 2.219 3.173 159 16.8 0:51 ( 0, 76) C/2023 R1 ( PanSTARRS ) Now it is 16.9 mag (Sept. 15, 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 December. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 22 54.43 28 52.6 5.124 5.968 144 16.8 21:56 ( 0, 84) Oct. 12 22 46.95 27 57.2 5.119 5.923 140 16.8 21:21 ( 0, 83) C/2022 U3 ( Bok ) Now it is 18.9 mag (Sept. 30, Yasukazu Ikari). It stays 17 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 7 58.52 10 57.6 5.059 4.856 72 16.8 4:34 (296, 48) Oct. 12 8 2.18 10 5.2 4.963 4.863 78 16.8 4:39 (305, 53) C/2023 TD22 ( Lemmon ) Brightened rapidly. Now it is 16.2 mag (Sept. 28, A. Diepvens). 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) Oct. 5 20 13.53 -11 49.2 1.818 2.366 110 16.8 19:15 ( 0, 43) Oct. 12 19 58.45 -12 51.7 1.984 2.373 100 17.0 18:52 ( 6, 42) 333P/LINEAR It is expected to brighten very rapidly up to 10 mag from November to Decemebr. Now it is 18.9 mag (July 7, J. L. Virlichie, P. Traverse, H. Roy). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 10 25.95 -4 15.1 2.047 1.345 34 18.3 4:34 (283, 10) Oct. 12 10 31.96 -2 36.4 1.900 1.296 39 16.9 4:39 (286, 17) C/2022 U1 ( Leonard ) Now it is 16.5 mag (Oct. 1, A. Diepvens). 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) Oct. 5 19 10.48 30 18.6 4.248 4.500 98 16.9 19:02 ( 69, 79) Oct. 12 19 7.73 28 17.4 4.356 4.521 93 17.0 18:52 ( 70, 74) 190P/Mueller Now it is 17.5 mag (Sept. 12, A. Diepvens). 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) Oct. 5 22 37.99 -7 23.3 1.230 2.136 146 17.0 21:40 ( 0, 48) Oct. 12 22 36.96 -7 21.4 1.258 2.117 139 17.0 21:11 ( 0, 48) 305P/Skiff It will brighten up to 16 mag and will be observable in good condition in winter. Now it is 17.6 mag (Oct. 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) Oct. 5 21 31.91 12 4.0 0.644 1.509 132 17.2 20:34 ( 0, 67) Oct. 12 21 38.95 11 1.2 0.643 1.483 127 17.0 20:14 ( 0, 66) 49P/Arend-Rigaux It will brighten up to 14 mag in 2025 spring. Now it is 17.1 mag (Sept. 23, Taras Prystavski). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 23 54.82 -29 50.5 1.488 2.368 143 17.1 22:56 ( 0, 25) Oct. 12 23 48.55 -30 31.6 1.485 2.321 137 17.1 22:22 ( 0, 25) 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 16.9 mag (Sept. 11, 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 January. In the Southern Hemisphere, it will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Oct. 5 17 22.98 26 38.8 8.041 7.829 74 17.1 19:02 ( 87, 56) Oct. 12 17 26.03 26 9.6 8.145 7.871 70 17.2 18:52 ( 88, 52) 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) Oct. 5 23 15.61 -19 53.7 1.710 2.608 147 17.1 22:17 ( 0, 35) Oct. 12 23 12.29 -19 20.0 1.783 2.632 140 17.3 21:47 ( 0, 36) 48P/Johnson Now it is 17.3 mag (Oct. 1, 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) Oct. 5 16 34.82 -18 32.8 2.678 2.309 57 17.3 19:02 ( 51, 18) Oct. 12 16 47.15 -19 24.8 2.723 2.285 54 17.2 18:52 ( 51, 16) 242P/Spahr Now it is 17.9 mag (Sept. 27, 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) Oct. 5 4 22.16 -9 58.7 3.346 3.988 123 17.3 3:27 ( 0, 45) Oct. 12 4 21.63 -11 5.5 3.284 3.985 128 17.3 2:59 ( 0, 44) 302P/Lemmon-PanSTARRS Now it is 17.0 mag (Oct. 4, 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) Oct. 5 19 5.17 -22 39.5 3.157 3.362 93 17.3 19:02 ( 14, 31) Oct. 12 19 10.48 -22 38.8 3.250 3.356 87 17.3 18:52 ( 18, 30) 338P/McNaught Now it is 17.2 mag (Sept. 25, Masayoshi Yoshimi). 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) Oct. 5 2 39.94 33 28.5 1.473 2.333 140 17.4 1:46 ( 0, 89) Oct. 12 2 33.25 34 59.3 1.446 2.343 146 17.4 1:12 (180, 90) 328P/LONEOS-Tucker Now it is 17.7 mag (Sept. 21, Thomas Lehmann). 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) Oct. 5 4 8.85 45 57.0 1.285 1.980 119 17.4 3:14 (180, 79) Oct. 12 4 10.45 47 34.2 1.259 2.001 124 17.5 2:49 (180, 77) 192P/Shoemaker-Levy 1 It brightened up to 15.9 mag in summer (July 8, Hidetaka Sato). Now it is 17.8 mag (Sept. 12, ATLAS-HKO, Haleakala). 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) Oct. 5 7 13.26 34 42.5 1.969 2.155 86 17.5 4:34 (263, 69) Oct. 12 7 21.37 36 0.2 1.940 2.211 91 17.7 4:39 (261, 74) C/2021 S4 ( Tsuchinshan ) Now it is 18.2 mag (Oct. 2, ATLAS-MLO, Mauna Loa). 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) Oct. 5 7 33.45 39 14.7 6.968 6.925 83 17.5 4:34 (251, 65) Oct. 12 7 36.47 39 24.7 6.874 6.937 89 17.5 4:39 (250, 71) 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) Oct. 5 8 20.99 30 38.9 2.022 1.957 71 17.6 4:34 (265, 54) Oct. 12 8 35.66 30 20.1 1.987 1.988 75 17.5 4:39 (267, 58) C/2024 J3 ( ATLAS ) Now it is 17.5 mag (Oct. 2, ATLAS Chile). It stays 17 mag for a while. It will be unobservable in December. But it will be observable again in January in the Southern Hemisphere. 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) Oct. 5 18 22.61 -36 15.6 7.469 7.413 82 17.6 19:02 ( 20, 15) Oct. 12 18 23.68 -35 43.2 7.540 7.370 76 17.6 18:52 ( 23, 15) 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) Oct. 5 12 21.88 -63 24.9 3.264 2.877 58 17.6 4:34 (327,-37) Oct. 12 12 46.52 -62 46.7 3.343 2.898 55 17.7 4:39 (327,-36) 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) Oct. 5 3 8.01 4 23.7 1.472 2.356 144 17.9 2:13 ( 0, 59) Oct. 12 3 5.83 4 29.5 1.381 2.305 150 17.6 1:44 ( 0, 60) 50P/Arend Now it is 17.1 mag (Sept. 13, A. Diepvens). 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) Oct. 5 9 2.62 33 58.2 2.543 2.304 64 17.7 4:34 (255, 46) Oct. 12 9 14.93 33 27.5 2.501 2.336 68 17.7 4:39 (258, 50) C/2021 X1 ( Maury-Attard ) It brightened up to 14 mag in early 2023 and 2023 autumn. Now it is 17.9 mag (Sept. 6, Ken-ichi Kadota). 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) Oct. 5 20 21.93 16 47.1 5.026 5.521 114 17.7 19:24 ( 0, 72) Oct. 12 20 18.20 15 59.4 5.170 5.568 108 17.8 18:53 ( 0, 71) C/2024 J2 ( Wierzchos ) Now it is 17.7 mag (Sept. 13, J.-G. Bosch). Brightening slowly. 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) Oct. 5 15 3.06 39 24.0 3.166 2.711 54 17.8 19:02 (118, 33) Oct. 12 15 16.82 38 50.7 3.098 2.652 54 17.7 18:52 (118, 32) 117P/Helin-Roman-Alu 1 Now it is 17.0 mag (Sept. 14, Ken-ichi Kadota). 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) Oct. 5 3 35.18 16 58.8 3.690 4.467 136 17.7 2:41 ( 0, 72) Oct. 12 3 32.29 16 53.8 3.635 4.480 143 17.7 2:10 ( 0, 72) 276P/Vorobjov Now it is 17.3 mag (Oct. 4, Mt. Lemmon Survey). 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) Oct. 5 3 12.45 14 39.0 3.073 3.910 142 17.9 2:18 ( 0, 70) Oct. 12 3 10.26 14 6.1 3.014 3.908 149 17.8 1:48 ( 0, 69)