Weekly Information about Bright Comets (2024 Aug. 10: South)

Japanese version Home page	Updated on August 14, 2024
Last week North Next week

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.

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 7.3 mag (Aug. 4, Marco Goiato). It will fade out rapidly after this. 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) Aug. 10 11 57.62 30 29.7 1.954 1.329 38 7.5 18:50 (130, 3) Aug. 17 12 25.82 26 50.2 2.000 1.380 39 7.8 18:55 (127, 4) 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. Now it is 8.5 mag (Aug. 6, Chris Wyatt). 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 soon. But it will be observable again in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 10 52.06 -0 24.6 1.997 1.198 27 8.1 18:50 ( 96, 9) Aug. 17 10 49.47 -1 15.1 1.944 1.069 21 7.7 18:55 ( 90, 3) 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 9.8 mag (Aug. 6, Chris Wyatt). It will fade out rapidly after this. 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) Aug. 10 10 59.32 -46 18.4 2.184 1.996 65 9.6 18:50 ( 53, 33) Aug. 17 11 27.20 -46 50.5 2.313 2.086 64 9.9 18:55 ( 52, 33) C/2023 R2 ( PanSTARRS ) It will fade out rapidly after this. Now it is not observable. It will appear in September in the Northern Hemisphere. 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) Aug. 10 10 2.25 5 16.3 1.850 0.906 14 11.4 18:50 ( 94, -4) Aug. 17 10 37.56 4 40.9 1.845 0.909 15 11.4 18:55 ( 94, -2) C/2022 E2 ( ATLAS ) Now it is 12.5 mag (Aug. 7, Osamu Miyazaki). It stays 12 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 7 26.50 40 49.2 4.462 3.680 35 12.5 5:19 (228,-11) Aug. 17 7 29.58 41 45.6 4.379 3.675 40 12.5 5:13 (225, -9) C/2023 V4 ( Camarasa-Duszanowicz ) It brightened very rapidly up to 10.0 mag in June (June 11, Virgilio Gonano). Now it is 13.0 mag (July 31, Osamu Miyazaki). 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) Aug. 10 12 41.78 39 50.8 2.036 1.588 50 12.7 18:50 (143, 2) Aug. 17 13 4.59 35 18.2 2.130 1.662 49 13.1 18:55 (139, 4) C/2023 C2 ( ATLAS ) Now it is 13.5 mag (Aug. 3, Chris Wyatt). It stays 13 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable 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) Aug. 10 15 57.74 -55 54.2 2.109 2.609 108 12.8 18:50 ( 3, 69) Aug. 17 16 8.09 -53 15.9 2.139 2.578 103 12.8 18:55 ( 14, 71) 154P/Brewington Now it is 13.1 mag (July 23, Ken-ichi Kadota). It will fade out rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 14.57 36 36.1 2.220 1.683 46 13.0 5:19 (221, 2) Aug. 17 6 36.76 36 45.0 2.214 1.714 48 13.4 5:13 (221, 2) 2020 TS2 It approached to Sun down to 0.12 a.u. on Aug. 4. It will fade out rapidly after this. It will be fainter than 18 mag in September. Now it is not observable. It will appear soon in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 9 39.65 15 0.5 0.757 0.267 4 13.2 18:50 ( 98,-14) Aug. 17 9 24.49 9 31.3 0.538 0.482 6 15.0 5:13 (266,-12) 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 (Aug. 7, Osamu Miyazaki). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 19 26.11 59 34.7 2.372 2.757 101 13.8 22:08 (180, -5) Aug. 17 19 22.33 58 6.0 2.432 2.831 102 13.9 21:37 (180, -3) 46P/Wirtanen The condition is bad in this apparition. It must have brightened up to 10 mag in early summer, however, it is not observable at all. Fading rapidly. It will be fainter than 18 mag in October. It will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 10 6.24 18 49.9 2.478 1.499 11 13.9 18:50 (105,-10) Aug. 17 10 26.91 17 10.5 2.542 1.557 10 14.4 18:55 (103,-12) 37P/Forbes Now it is 16.0 mag (July 23, ATLAS Chile). It stays 14 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) Aug. 10 13 56.09 -20 58.6 1.647 1.728 76 14.2 18:50 (107, 58) Aug. 17 14 12.05 -21 46.0 1.679 1.706 74 14.1 18:55 (102, 56) C/2021 G2 ( ATLAS ) Now it is 14.4 mag (Aug. 3, 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 getting lower gradually after this, and 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) Aug. 10 12 39.16 -19 26.9 5.413 4.988 60 14.1 18:50 ( 95, 42) Aug. 17 12 45.42 -19 13.2 5.499 4.986 54 14.2 18:55 ( 91, 37) 29P/Schwassmann-Wachmann 1 Now it is not observable. It will appear in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 9 13.01 15 37.0 7.236 6.223 1 14.3 5:19 (262,-17) Aug. 17 9 18.12 15 9.9 7.228 6.224 7 14.3 5:13 (261,-13) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 14.2 mag (Aug. 3, 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) Aug. 10 23 48.99 -67 7.8 4.607 5.229 123 14.5 2:36 ( 0, 58) Aug. 17 23 32.66 -68 27.6 4.674 5.285 122 14.6 1:52 ( 0, 57) 146P/Shoemaker-LINEAR Now it is 15.1 mag (July 28, ATLAS Chile). It will fade out rapidly after this. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 4 11.67 4 30.0 1.263 1.421 76 14.7 5:19 (215, 44) Aug. 17 4 29.00 6 48.1 1.235 1.426 78 14.8 5:13 (213, 43) 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 15.2 mag (July 17, Taras Prystavski). 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) Aug. 10 23 0.08 -3 56.0 3.976 4.899 152 14.9 1:46 (180, 59) Aug. 17 22 57.81 -4 2.5 3.900 4.863 159 14.8 1:17 (180, 59) 130P/McNaught-Hughes Now it is 14.4 mag (July 18, Taras Prystavski). Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 2 28.29 7 29.3 1.637 2.073 100 14.9 5:14 (180, 47) Aug. 17 2 34.12 7 51.0 1.590 2.100 105 15.0 4:52 (180, 47) C/2022 S4 ( Lemmon ) Now it is 16.5 mag (June 20, Thomas Lehmann). Fading slowly. In the Northern Hemisphere, it is not observable now. The brightness evolution is slower than originally expected. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 7 47.49 -61 35.7 2.774 2.771 79 15.0 5:19 (325, 36) Aug. 17 8 24.05 -62 59.5 2.805 2.778 78 15.0 5:13 (327, 34) 192P/Shoemaker-Levy 1 Now it is 16.2 mag (July 28, 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) Aug. 10 5 30.50 24 35.5 2.131 1.744 54 15.1 5:19 (222, 17) Aug. 17 5 46.13 26 0.8 2.119 1.790 57 15.2 5:13 (220, 17) C/2022 QE78 ( ATLAS ) Now it is 15.9 mag (Mar. 26, ATLAS Chile). It stays 15 mag for a while. It will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 13.86 3 25.6 6.836 6.193 47 15.3 5:19 (245, 26) Aug. 17 6 18.51 3 26.5 6.738 6.170 52 15.2 5:13 (242, 29) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 14.5 mag (Apr. 27, Hiroshi Abe). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. 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) Aug. 10 6 17.12 16 48.1 7.191 6.497 43 15.3 5:19 (235, 16) Aug. 17 6 19.67 16 58.7 7.161 6.554 49 15.3 5:13 (232, 19) 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. 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) Aug. 10 9 48.51 -23 14.5 3.828 3.112 39 15.4 18:50 ( 68, 10) Aug. 17 9 50.02 -23 44.6 3.895 3.148 37 15.4 18:55 ( 64, 4) 32P/Comas Sola Now it is 14.7 mag (May 31, Hiroshi Abe). Fading slowly. Now it is not observable. It will appear in October in the Northern Hemisphere, or in November in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 10 12.62 18 22.4 3.229 2.252 12 15.5 18:50 (106, -9) Aug. 17 10 27.28 16 57.6 3.267 2.279 10 15.6 18:55 (102,-12) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.9 mag (July 25, Hidetaka Sato). It stays 16 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) Aug. 10 4 16.14 -64 57.6 15.901 16.078 98 15.6 5:19 (341, 56) Aug. 17 4 18.21 -65 26.6 15.866 16.054 98 15.6 5:13 (344, 57) 30P/Reinmuth 1 Now it is 16.5 mag (Apr. 3, Taras Prystavski). It stays 16 mag for a while. Now it is not observable. It will appear in September in the Northern Hemisphere, or in November in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 8 43.50 18 42.1 2.807 1.813 9 15.6 5:19 (256,-12) Aug. 17 9 2.54 17 44.9 2.794 1.812 11 15.6 5:13 (256,-12) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 16.3 mag (July 16, ATLAS Chile). 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 winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 11 13.77 -46 14.5 8.803 8.458 66 15.8 18:50 ( 54, 35) Aug. 17 11 18.61 -46 19.4 8.910 8.503 63 15.9 18:55 ( 52, 31) 299P/Catalina-PanSTARRS It brightened very rapidly in outburst in late May. Now it is 15.6 mag (July 11, Giuseppe Pappa). Fading slowly. It will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 15 37.04 -22 44.2 2.866 3.199 99 15.9 18:50 (150, 76) Aug. 17 15 42.33 -22 39.2 2.966 3.205 94 16.0 18:55 (131, 73) C/2019 U5 ( PanSTARRS ) Now it is 14.9 mag (June 5, Thomas Lehmann). It stays 16 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 7 48.79 -34 11.8 6.159 5.628 54 16.0 5:19 (294, 27) Aug. 17 7 50.90 -34 53.4 6.182 5.671 55 16.1 5:13 (293, 31) 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 16.5 mag (July 11, Giuseppe Pappa). 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 13 1.99 -58 44.3 2.988 3.104 86 16.3 18:50 ( 37, 52) Aug. 17 13 7.90 -56 52.8 2.982 3.008 81 16.2 18:55 ( 41, 49) 479P/2023 WM26 ( Elenin ) First return of a new periodic comet which was discovered in 2011, half a year after the perihelion passage. It brightened very rapidly up to 10.7 mag in spring (Apr. 28, Marco Goiato). Now it is 17.8 mag (July 26, ATLAS Chile). Fading rapidly. It will be fainter than 18 mag in September. 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) Aug. 10 15 27.80 -28 1.1 1.299 1.768 98 16.3 18:50 (128, 79) Aug. 17 15 47.93 -27 36.5 1.411 1.828 96 16.8 18:55 (121, 77) 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 16.3 mag (Aug. 2, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 44.57 -35 37.6 5.618 5.237 63 16.3 5:19 (290, 40) Aug. 17 6 48.58 -35 49.6 5.637 5.285 64 16.3 5:13 (289, 43) C/2023 Q1 ( PanSTARRS ) Now it is 16.5 mag (July 26, ATLAS-MLO, Mauna Loa). Brightening slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 4 18.14 46 29.5 3.049 2.844 68 16.5 5:19 (198, 5) Aug. 17 4 32.30 48 20.8 2.950 2.814 72 16.3 5:13 (196, 4) 89P/Russell 2 Now it is 16.7 mag (Aug. 2, ATLAS South Africa). 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) Aug. 10 23 55.82 -19 18.3 1.545 2.431 142 16.4 2:42 (180, 74) Aug. 17 23 52.57 -19 42.7 1.526 2.451 149 16.4 2:11 (180, 75) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (July 30, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 13 24.73 -41 31.2 5.437 5.359 80 16.5 18:50 ( 66, 58) Aug. 17 13 23.74 -40 54.7 5.536 5.346 73 16.5 18:55 ( 66, 52) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 16.4 mag (July 25, Hidetaka Sato). Brightening slowly. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 5 33.25 16 44.5 3.885 3.394 54 16.7 5:19 (227, 23) Aug. 17 5 42.18 16 31.3 3.809 3.397 58 16.6 5:13 (225, 25) C/2022 R6 ( PanSTARRS ) Now it is 16.6 mag (Aug. 2, ATLAS South Africa). 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 stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 35.61 -24 21.7 7.551 7.044 56 16.6 5:19 (276, 37) Aug. 17 6 40.39 -24 36.7 7.492 7.027 59 16.6 5:13 (274, 41) 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 (Aug. 1, 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 October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 17 12.66 31 6.9 7.183 7.502 104 16.6 19:55 (180, 24) Aug. 17 17 12.40 30 34.9 7.285 7.543 100 16.7 19:28 (180, 24) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.6 mag (July 17, 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) Aug. 10 2 58.82 -66 42.7 10.082 10.413 106 16.7 5:19 (355, 58) Aug. 17 2 55.64 -67 13.7 10.072 10.418 107 16.7 5:13 ( 0, 58) C/2024 A1 ( ATLAS ) Now it is 17.3 mag (May 6, ATLAS Chile). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 7 40.56 -26 27.2 5.302 4.691 48 16.8 5:19 (286, 25) Aug. 17 7 45.83 -26 12.6 5.256 4.659 49 16.8 5:13 (284, 28) P/2023 S1 Now it is 17.5 mag (Mar. 9, Toshihiko Ikemura, Hirohisa Sato). Brightening slowly. In the Northern Hemisphere, it will be getting higher gradually. 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) Aug. 10 6 48.02 28 30.8 3.604 2.865 37 16.9 5:19 (232, 3) Aug. 17 7 0.41 28 12.4 3.531 2.849 41 16.8 5:13 (231, 4) C/2023 TD22 ( Lemmon ) Now it is 17.1 mag (Aug. 9, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in October. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 0 14.02 6 25.5 1.595 2.392 131 17.0 3:01 (180, 48) Aug. 17 23 46.43 4 30.9 1.477 2.380 145 16.9 2:06 (180, 50) 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 17.4 mag (Aug. 2, ATLAS South Africa). It will brighten rapidly after this. In the Northern Hemisphere, it is not observable now, but it will be observable 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) Aug. 10 6 2.52 -31 53.0 2.310 2.129 66 17.1 5:19 (281, 47) Aug. 17 6 12.04 -30 54.8 2.237 2.079 67 16.9 5:13 (279, 49) C/2024 B1 ( Lemmon ) It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in winter. 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) Aug. 10 7 31.30 41 27.3 2.548 1.812 34 17.1 5:19 (228,-12) Aug. 17 7 55.32 43 25.2 2.454 1.774 38 16.9 5:13 (226,-14) 328P/LONEOS-Tucker Now it is 16.8 mag (July 26, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag in October. 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) Aug. 10 2 57.24 29 29.0 1.631 1.877 87 17.0 5:19 (186, 25) Aug. 17 3 9.64 31 45.1 1.578 1.883 90 17.0 5:13 (183, 23) 65P/Gunn Now it is 16.4 mag (July 23, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It will be unobservable in September in the Northern Hemisphere, or in October in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 13 10.34 -3 7.9 3.671 3.283 59 17.0 18:50 (118, 38) Aug. 17 13 17.35 -4 6.3 3.739 3.269 55 17.0 18:55 (112, 34) C/2021 X1 ( Maury-Attard ) It brightened up to 14 mag in early 2023 and 2023 autumn. Now it is 17.4 mag (July 29, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in October. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 21 22.11 22 29.1 4.315 5.151 141 17.1 0:09 (180, 32) Aug. 17 21 12.33 22 3.9 4.348 5.197 143 17.1 23:26 (180, 33) 362P/(457175) 2008 GO98 Now it is 16.4 mag (May 4, Toshiyuki Takahashi). It stays 17 mag for a while. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in November. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 15 19.99 -3 39.9 2.665 2.868 91 17.2 18:50 (158, 57) Aug. 17 15 26.15 -4 18.6 2.755 2.870 86 17.3 18:55 (147, 55) C/2023 R1 ( PanSTARRS ) Now it is 17.3 mag (July 30, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 23 55.78 32 3.5 5.763 6.324 119 17.3 2:42 (180, 23) Aug. 17 23 49.42 32 6.1 5.634 6.279 125 17.2 2:08 (180, 23) C/2022 U1 ( Leonard ) Now it is 17.2 mag (July 21, Ken-ichi Kadota). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 20 24.37 46 24.1 3.804 4.356 116 17.3 23:05 (180, 9) Aug. 17 20 9.78 44 53.3 3.808 4.371 117 17.3 22:23 (180, 10) 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 18.5 mag (July 25, Hidetaka Sato). Brightening gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 3 51.35 -3 24.1 1.794 1.956 83 17.6 5:19 (214, 54) Aug. 17 4 1.23 -1 43.3 1.703 1.931 86 17.3 5:13 (209, 53) C/2024 L5 ( ATLAS ) Now it is 16.9 mag (July 31, ATLAS South Africa). It stays 17 mag for a while. It will be unobservable in September in the Northern Hemisphere, or in October in the Southern Hemisphere. But it will be observable again in December in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 15 23.51 -32 27.6 3.677 3.965 99 17.3 18:50 (102, 81) Aug. 17 15 17.30 -31 42.6 3.783 3.933 91 17.3 18:55 ( 95, 73) 253P/PanSTARRS Now it is 18.8 mag (July 29, 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) Aug. 10 0 49.72 2 9.6 1.347 2.102 125 17.5 3:35 (180, 53) Aug. 17 0 53.78 2 4.0 1.279 2.088 130 17.3 3:12 (180, 53) 50P/Arend It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 53.46 37 9.0 2.770 2.080 38 17.4 5:19 (226, -4) Aug. 17 7 12.18 37 0.7 2.751 2.104 41 17.4 5:13 (226, -4) 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 will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will appear in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 6 54.42 38 37.0 7.595 6.841 39 17.6 5:19 (225, -5) Aug. 17 7 0.42 38 38.5 7.537 6.850 44 17.6 5:13 (223, -3) C/2024 J3 ( ATLAS ) Now it is 17.1 mag (July 30, ATLAS South Africa). It stays 18 mag for a while. In the Northern Hemisphere, it will be unobservable in December. In the Southern Hemisphere, it stays observable in good condition. 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) Aug. 10 18 34.17 -40 35.1 6.994 7.759 136 17.6 21:17 ( 0, 84) Aug. 17 18 30.77 -40 5.5 7.030 7.716 129 17.6 20:46 ( 0, 85) 338P/McNaught Now it is 18.0 mag (July 8, Hidetaka Sato). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 2 34.92 18 49.5 1.961 2.288 95 17.7 5:19 (180, 36) Aug. 17 2 40.36 20 40.8 1.884 2.290 100 17.7 4:58 (180, 34) 125P/Spacewatch Now it is 17.2 mag (July 29, ATLAS-HKO, Haleakala). It will fade out rapidly after this. It will be fainter than 18 mag soon. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 21 29.98 -10 0.6 1.095 2.106 173 17.8 0:17 (180, 65) Aug. 17 21 24.30 -11 20.3 1.136 2.146 174 18.0 23:39 (180, 66) 49P/Arend-Rigaux It will brighten up to 14 mag in 2025 spring. Now it is 18.5 mag (Aug. 1, ATLAS South Africa). It stays 17 mag for a while. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Aug. 10 0 27.31 -18 42.3 1.929 2.743 135 18.0 3:13 (180, 74) Aug. 17 0 27.04 -20 3.3 1.834 2.697 141 17.8 2:45 (180, 75) 208P/McMillan Now it is 18.8 mag (July 6, Taras Prystavski). 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) Aug. 10 0 2.25 -5 34.9 1.677 2.530 138 17.9 2:48 (180, 60) Aug. 17 0 1.11 -5 43.4 1.626 2.529 145 17.8 2:20 (180, 61) 242P/Spahr 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) Aug. 10 3 59.35 -2 27.5 4.048 4.019 81 17.9 5:19 (216, 52) Aug. 17 4 4.45 -3 9.4 3.951 4.015 86 17.8 5:13 (211, 54) 190P/Mueller Now it is 18.8 mag (July 27, 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) Aug. 10 23 7.08 -5 47.3 1.386 2.329 151 18.1 1:53 (180, 61) Aug. 17 23 4.66 -5 53.0 1.327 2.302 159 17.9 1:23 (180, 61) 117P/Helin-Roman-Alu 1 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) Aug. 10 3 31.46 16 20.0 4.366 4.360 82 17.9 5:19 (197, 37) Aug. 17 3 34.41 16 32.8 4.273 4.374 88 17.9 5:13 (192, 38) P/2010 WK ( LINEAR ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 19.1 mag (Aug. 13, John Maikner). 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) Aug. 10 5 51.17 30 26.8 2.273 1.795 49 18.3 5:19 (222, 10) Aug. 17 6 11.79 30 55.9 2.241 1.805 52 18.2 5:13 (221, 9)