Weekly Information about Bright Comets (2023 July 22: North)

Japanese version Home page	Updated on July 26, 2023
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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/2021 T4 ( Lemmon ) Now it is 8.3 mag (July 15, Michael Mattiazzo). It will fade out rapidly after this. It locates extremely low in the Northern Hemisphere. It will be unobservable in October in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 19 18.34 -55 51.7 0.544 1.489 143 7.9 23:04 ( 0, -1) July 29 16 53.14 -47 15.0 0.626 1.484 127 8.2 20:44 ( 4, 8) C/2023 E1 ( ATLAS ) It brightened very rapidly. Now it is 9.0 mag (July 22, Seiichi Yoshida). 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. In the Southern Hemisphere, it is not observable now, but it will appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 19 40.97 76 1.1 0.506 1.083 83 9.2 23:46 (180, 49) July 29 20 37.26 69 40.2 0.457 1.124 91 9.4 0:10 (180, 55) C/2020 V2 ( ZTF ) Now it is 9.5 mag (July 15, Michael Mattiazzo). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 3 12.51 8 57.1 2.520 2.386 70 9.8 3:20 (281, 31) July 29 3 11.51 6 23.5 2.406 2.415 78 9.7 3:28 (290, 36) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 11 mag (July 15, Michael Mattiazzo). It stays 12 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in August. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 6 19.62 -9 39.0 3.863 3.145 39 11.5 3:20 (269,-18) July 29 6 25.31 -9 13.3 3.892 3.208 41 11.6 3:28 (273,-12) 12P/Pons-Brooks It returns for the first time in 70 years. It will brighten up to 4.5 mag in 2024 spring. It suddenly brightened in outburst by 5 mag up to 11.5 mag on July 20 (E. Tamas, Francois Kugel). Now it is 11.9 mag (July 22, Osamu Miyazaki). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 18 16.30 55 50.1 3.554 3.869 100 11.6 22:15 (180, 69) July 29 18 4.92 55 44.0 3.500 3.797 99 11.8 21:36 (180, 69) C/2022 A2 ( PanSTARRS ) It brightened up to 9.5 mag from winter to early spring (Jan. 30, Katsumi Yoshimoto). Now it is 12.6 mag (July 22, Seiichi Yoshida). It will fade out rapidly after this. 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) July 22 0 46.97 30 15.3 2.297 2.592 95 11.8 3:20 (277, 70) July 29 0 39.99 28 39.2 2.228 2.653 103 11.9 3:28 (297, 78) 103P/Hartley 2 It is expected to brighten up to 7.5 mag in October. Now it is 13.9 mag (July 16, Mitsunori Tsumura). Brightening rapidly. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn. It is fainter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 23 42.61 24 40.9 0.834 1.520 110 12.9 3:20 (330, 78) July 29 0 1.55 27 56.8 0.750 1.461 110 12.3 3:28 (344, 83) 237P/LINEAR It brightened very rapidly as expected. Now it is 12.3 mag (July 22, Chris Wyatt). It will fade out rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 19 40.17 0 36.0 1.082 2.060 158 12.5 23:40 ( 0, 56) July 29 19 35.71 0 50.4 1.106 2.076 156 12.7 23:08 ( 0, 56) C/2021 S3 ( PanSTARRS ) It is expected to brighten up to 7 mag in early 2024. Now it is 14.1 mag (June 19, Chris Wyatt). It will brighten rapidly after this. In the Northern Hemisphere, it is not observable now, but it will appear in November. It locates somewhat low in the Southern Hemisphere. But it will become high in winter. The brightness evolution slowed down since May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 7 35.15 -24 8.9 3.710 3.078 45 12.7 3:20 (273,-41) July 29 7 47.53 -24 34.5 3.639 3.005 44 12.6 3:28 (276,-37) C/2019 U5 ( PanSTARRS ) Now it is 13.7 mag (July 14, Chris Wyatt). It stays 13 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 unobservable in August. But it will be observable again in September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 10 22.53 -9 50.6 4.405 3.767 45 12.6 20:51 ( 86,-11) July 29 10 24.04 -10 43.2 4.496 3.785 40 12.7 20:44 ( 87,-16) 185P/Petriew It was expected to brighten up to 11 mag in July. But actually, it is fainter than originally expected. Now it is 12.7 mag (July 15, Michael Mattiazzo). It will fade out rapidly after this. It will be fainter than 18 mag in October. It stays extremely low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 5 39.29 21 16.1 1.601 0.940 33 12.8 3:20 (249, 8) July 29 6 11.80 20 3.1 1.643 0.961 32 12.9 3:28 (251, 8) C/2020 K1 ( PanSTARRS ) Now it is 13.1 mag (July 22, Chris Wyatt). Fading slowly. In the Northern Hemisphere, it is not observable now. It was expected to brighten up to 10 mag from spring to summer. However, it is fainter than originally expected. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 11 10.93 -82 56.8 2.729 3.157 105 12.8 20:51 ( 9,-34) July 29 11 7.29 -80 53.9 2.806 3.174 101 12.9 20:44 ( 11,-35) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 13.2 mag (July 14, Chris Wyatt). It stays 14 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in November. 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) July 22 9 50.76 -30 47.3 6.468 5.982 57 13.0 20:51 ( 70,-28) July 29 9 56.38 -31 9.0 6.565 6.027 54 13.1 20:44 ( 72,-31) C/2022 W3 ( Leonard ) Now it is 13.3 mag (July 13, 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. In the Southern Hemisphere, it is not observable now, but it will appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 22 33.48 63 1.2 1.023 1.460 91 13.7 2:39 (180, 62) July 29 21 36.57 58 5.9 0.906 1.492 101 13.5 1:15 (180, 66) 126P/IRAS Now it is 13.6 mag (July 16, Mitsunori Tsumura). 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 September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 2 15.63 18 43.9 1.561 1.720 80 13.7 3:20 (280, 47) July 29 2 23.07 23 0.5 1.504 1.730 84 13.7 3:28 (280, 55) 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 13.0 mag (July 22, Chris Wyatt). 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 October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 15 12.65 21 7.9 5.156 5.388 97 13.7 20:51 ( 63, 64) July 29 15 13.79 20 47.4 5.276 5.422 92 13.8 20:44 ( 69, 61) 29P/Schwassmann-Wachmann 1 It stays 14 mag for a while. Now it is not observable. It will appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 7 39.35 24 24.4 7.127 6.119 6 14.2 3:20 (229,-11) July 29 7 45.04 24 7.7 7.112 6.121 11 14.2 3:28 (234, -7) C/2021 X1 ( Maury-Attard ) Now it is 14.4 mag (July 16, 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) July 22 2 32.54 6 48.7 3.283 3.277 80 14.2 3:20 (290, 37) July 29 2 27.26 7 8.5 3.154 3.288 88 14.2 3:28 (299, 45) C/2021 Y1 ( ATLAS ) The brightness evolution is slower than originally predicted. Now it is 14.3 mag (July 7, Thomas Lehmann). Fading slowly. 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) July 22 8 32.48 -42 49.7 2.518 2.258 63 14.3 20:51 ( 62,-47) July 29 8 58.58 -44 12.7 2.561 2.295 63 14.3 20:44 ( 60,-46) C/2022 E3 ( ZTF ) It approached to Earth down to 0.29 a.u. in early February, and it brightened up to 4.5 mag (Feb. 1, Juan Jose Gonzalez). Now it is 14 mag (July 15, Michael Mattiazzo). Fading 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) July 22 6 20.30 -25 44.8 3.433 2.928 52 14.3 3:20 (284,-27) July 29 6 24.80 -27 34.5 3.460 3.006 55 14.5 3:28 (289,-22) 81P/Wild 2 Now it is 14.1 mag (July 15, W. Pei). It will fade out rapidly 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) July 22 16 55.87 -19 11.0 1.701 2.533 136 14.4 20:57 ( 0, 36) July 29 16 56.10 -19 26.0 1.806 2.575 129 14.6 20:44 ( 4, 35) 199P/Shoemaker 4 Now it is 14.5 mag (July 17, L. Grazzini). Fading 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) July 22 17 58.23 -28 13.1 1.984 2.913 150 14.6 21:59 ( 0, 27) July 29 17 55.24 -29 7.0 2.033 2.911 143 14.6 21:28 ( 0, 26) C/2022 L2 ( ATLAS ) Now it is 14.8 mag (July 17, Toshihiko Ikemura, Hirohisa Sato). It stays 15 mag for a while. It will be getting lower gradually after this, and it will be unobservable in October. It is expected to brighten up to 12.5 mag in 2024 spring. At the high light, it will be observable in excellent condition in the Southern Hemisphere, but it will be low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 15 46.09 15 48.7 3.165 3.600 107 14.7 20:51 ( 41, 66) July 29 15 37.06 14 7.8 3.226 3.555 100 14.7 20:44 ( 51, 60) C/2023 K1 ( ATLAS ) It brightened very rapidly. Now it is 14.9 mag (July 13, Taras Prystavski). Fading gradually. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 14 1.49 -54 7.1 1.597 2.118 106 14.8 20:51 ( 24, -6) July 29 13 54.74 -47 38.1 1.698 2.097 98 14.7 20:44 ( 31, -3) 71P/Clark It brightened up to 12.8 mag in spring (Mar. 8, Taras Prystavski). Now it is 14.7 mag (July 15, Thomas Lehmann). Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 1 27.18 -2 14.7 1.855 2.253 99 14.9 3:20 (314, 42) July 29 1 31.09 -2 8.5 1.811 2.292 104 15.1 3:28 (323, 46) C/2022 E2 ( ATLAS ) Now it is 15.6 mag (July 8, Thomas Lehmann). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it will be unobservable soon. But it will be observable again in September. It is expected to brighten up to 12 mag from 2024 to 2025. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 9 9.25 2 23.0 6.081 5.171 24 15.0 20:51 (107,-19) July 29 9 12.12 2 39.8 6.079 5.130 19 15.0 20:44 (110,-22) C/2022 JK5 ( PanSTARRS ) The ATLAS search program detected its cometary activity in April. It continues to be brightening even after the perihelion passage. Now it is 14.7 mag (July 10, Ken-ichi Kadota). Fading slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 23 59.07 -25 7.5 2.101 2.819 125 15.1 3:20 (349, 29) July 29 0 0.83 -25 31.9 2.067 2.841 131 15.1 3:28 (358, 30) C/2021 G2 ( ATLAS ) It will brighten up to 14 mag from 2024 to 2025. Now it is 15.2 mag (July 13, ATLAS Chile). It stays 15 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) July 22 9 45.62 -26 50.1 6.445 5.896 53 15.3 20:51 ( 75,-28) July 29 9 52.21 -26 49.2 6.471 5.868 49 15.2 20:44 ( 77,-30) 117P/Helin-Roman-Alu 1 Now it is 15.7 mag (July 16, Hiroshi Abe). 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) July 22 0 47.81 -4 49.9 3.056 3.525 109 15.3 3:20 (327, 45) July 29 0 49.06 -4 54.5 2.980 3.540 115 15.3 3:28 (338, 48) 77P/Longmore Now it is 14.9 mag (July 14, Thomas Lehmann). Fading gradually. In the Northern Hemisphere, it will be unobservable 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) July 22 13 45.70 -34 24.9 2.101 2.458 97 15.4 20:51 ( 37, 8) July 29 13 53.95 -34 54.1 2.191 2.471 93 15.5 20:44 ( 38, 6) 213P/Van Ness It has not been observed yet in this apparition. It was expected to brighten rapidly up to 15 mag in summer. But actually, it is not detected, fainter than 18.5 mag (July 18, Martin Masek). 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) July 22 16 41.56 -32 52.4 1.328 2.160 133 15.7 20:51 ( 2, 22) July 29 16 42.58 -31 57.0 1.364 2.139 127 15.5 20:44 ( 6, 23) C/2023 A3 ( Tsuchinshan-ATLAS ) It will approach to Sun down to 0.4 a.u. in late September in 2024, and it is expected to brighten up to 0 mag. Now it is 16.3 mag (July 16, Ken-ichi Kadota). Brightening slowly. It will be getting lower gradually after this, and it will be unobservable in October. But it will be observable again in November in the Northern Hemisphere. At the high light, in the Northern Hemisphere, it will be observable in good condition after the perihelion passage. In the Southern Hemisphere, it will be observable in the low sky before and after the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 14 4.88 2 29.3 5.860 5.939 89 16.1 20:51 ( 59, 40) July 29 14 3.73 2 10.3 5.910 5.872 82 16.0 20:44 ( 63, 36) 2P/Encke It will brighten up to 7.5 mag in October. Now it is 17.9 mag (June 25, A. Hale). Brightening rapidly. It will be unobservable in September in the Southern Hemisphere, or in October in the Northern Hemisphere. But it will be observable again in July in the Northern Hemisphere. Thomas Lehmann reported it is bright as 14.1 mag on July 17. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 3 22.01 26 27.2 1.892 1.710 63 17.0 3:20 (261, 37) July 29 3 41.55 28 0.8 1.745 1.623 66 16.3 3:28 (261, 41) C/2020 R7 ( ATLAS ) It brightened up to 13.4 mag in last summer (July 7, 2022, Giuseppe Pappa). Now it is 16.3 mag (July 17, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. 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) July 22 15 32.25 33 40.5 3.971 4.198 95 16.4 20:51 ( 91, 74) July 29 15 27.53 33 17.7 4.104 4.243 90 16.5 20:44 ( 93, 69) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 17.8 mag (July 9, Jean-Claude Merlin). 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) July 22 3 27.91 -59 52.1 17.263 17.426 97 16.4 3:20 (332,-18) July 29 3 29.71 -60 17.7 17.207 17.401 99 16.4 3:28 (335,-15) P/2023 M4 ( ATLAS ) Now it is 16.1 mag (July 16, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. It will be fainter than 18 mag in October. It stays observable in good condition. It was very faint as 21.5 mag in 2021. It seems to be bright temporarily in outburst. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 21 37.65 -10 24.6 3.484 4.427 155 16.4 1:42 ( 0, 45) July 29 21 34.15 -10 32.1 3.461 4.440 162 16.5 1:11 ( 0, 45) 219P/LINEAR Now it is 16.5 mag (July 16, Ken-ichi Kadota). 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) July 22 17 47.49 -10 30.5 1.802 2.704 145 16.6 21:48 ( 0, 44) July 29 17 44.45 -10 28.7 1.833 2.684 139 16.6 21:17 ( 0, 45) 364P/PanSTARRS It approached to Earth down to 0.12 a.u. in April, and brightened up to 11.5 mag (Apr. 8, Osamu Miyazaki). Now it is 15 mag (July 15, Michael Mattiazzo). Fading rapidly. It will be fainter than 18 mag in August. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 2 33.97 -0 16.0 0.968 1.313 82 16.7 3:20 (296, 32) July 29 2 38.28 0 6.4 0.978 1.387 88 17.1 3:28 (303, 38) C/2019 E3 ( ATLAS ) Very far object. Now it is 17.0 mag (May 11, 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) July 22 5 41.30 -68 22.4 10.238 10.332 92 16.8 3:20 (334,-34) July 29 5 43.96 -68 48.4 10.232 10.330 92 16.8 3:28 (335,-32) C/2020 Y2 ( ATLAS ) It brightened up to 14.1 mag in 2022 spring (Mar. 22, 2022, Chris Wyatt). It was expected to brighten up to 13 mag. But actually, it was fainter than originally expected. Now it is 16.2 mag (July 17, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. 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) July 22 3 6.79 -3 8.0 4.986 4.846 76 16.9 3:20 (293, 24) July 29 3 6.35 -2 55.9 4.919 4.892 82 16.9 3:28 (299, 31) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (July 12, A. Brossel). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in October. In the Southern Hemisphere, it stays observable in good condition. It stays 16 mag in the Southern sky for a long time from 2024 to 2025. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 16 59.94 -41 9.4 5.876 6.647 136 17.1 21:01 ( 0, 14) July 29 16 52.84 -41 1.6 5.931 6.616 128 17.1 20:44 ( 3, 14) 32P/Comas Sola It is expected to brighten up to 14 mag in winter. Now it is 17.8 mag (July 6, John Maikner). Brightening gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 2 45.69 10 41.8 3.115 3.040 76 17.3 3:20 (284, 37) July 29 2 52.99 11 17.9 2.986 3.003 81 17.1 3:28 (289, 43) C/2021 S4 ( Tsuchinshan ) Now it is 17.4 mag (Feb. 16, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag for a while. 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) July 22 4 27.31 35 40.7 7.393 6.775 49 17.3 3:20 (244, 28) July 29 4 32.41 36 4.8 7.304 6.768 54 17.3 3:28 (247, 34) C/2022 S4 ( Lemmon ) It is expected to brighten up to 14 mag in 2024 summer. At the high light, it is not observable in the Northern Hemisphere. Now it is 18.2 mag (July 15, ATLAS Chile). Brightening slowly. 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) July 22 3 22.79 7 26.0 4.769 4.502 68 17.4 3:20 (281, 28) July 29 3 25.67 6 33.7 4.607 4.452 74 17.3 3:28 (287, 33) C/2020 F2 ( ATLAS ) Now it is 17.4 mag (July 17, Toshihiko Ikemura, Hirohisa Sato). It stays 18 mag for a while. It will be unobservable in September. But it will be observable again in October in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 12 14.79 14 7.8 9.540 9.076 60 17.3 20:51 ( 90, 25) July 29 12 14.88 13 59.6 9.649 9.086 53 17.4 20:44 ( 93, 21) P/2023 L1 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2008. Now it is 18.2 mag (June 16, Toshihiko Ikemura, Hirohisa 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) July 22 2 59.71 22 48.6 2.573 2.417 69 17.4 3:20 (268, 40) July 29 3 10.78 22 44.7 2.511 2.433 73 17.4 3:28 (272, 45) C/2022 QE78 ( ATLAS ) Now it is 17.8 mag (Feb. 26, Jean-Claude Merlin). It stays 17 mag for a while. 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) July 22 4 38.39 -8 55.5 8.286 7.799 58 17.5 3:20 (283, 3) July 29 4 41.81 -9 0.3 8.175 7.766 62 17.5 3:28 (288, 9) C/2022 U4 ( Bok ) Now it is 17.6 mag (July 17, Toshihiko Ikemura, Hirohisa Sato). 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) July 22 13 52.88 42 35.9 3.002 2.901 74 17.5 20:51 (116, 55) July 29 14 2.51 40 41.7 3.037 2.899 72 17.5 20:44 (113, 53) C/2018 U1 ( Lemmon ) It brightened up to 13.6 mag in 2021 (June 17, 2021, R. Carstens). Now it is 17.3 mag (June 9, D. Husar, M. Junius, S. Messner). It stays 18 mag for a while. 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) July 22 11 1.96 -61 36.1 6.772 6.838 89 17.5 20:51 ( 33,-29) July 29 11 4.02 -61 4.1 6.873 6.872 85 17.6 20:44 ( 34,-31) 322P/SOHO It will approach to Sun down to 0.05 a.u. on Aug. 21, and it will brighten up to 5.5 mag. It will turn to fade out rapidly after brightening. It will be unobservable soon in the Northern Hemisphere, or in August in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 11 41.29 -12 52.9 0.806 0.970 63 18.4 20:51 ( 72, 3) July 29 11 26.05 -8 41.4 0.816 0.813 51 17.6 20:44 ( 81, -2) 13P/Olbers It returns for the first time in 68 years. It will brighten up to 7.5 mag in 2024 summer. It has not been observed yet in this apparition. It will brighten rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition. At the high light, it locates low in the Northern Hemisphere, or it is not observable in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) July 22 3 59.37 -13 42.2 4.581 4.321 68 17.8 3:20 (292, 7) July 29 4 4.44 -13 49.1 4.436 4.257 73 17.7 3:28 (297, 13) 116P/Wild 4 It brightened up to 12.7 mag in last year (Feb. 27, 2022, Jose Guilherme de S. Aguiar). Now it is 17.1 mag (July 14, ATLAS Chile). Fading gradually. It will be fainter than 18 mag in August. 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) July 22 19 31.58 -27 6.0 2.184 3.190 170 17.8 23:32 ( 0, 28) July 29 19 25.90 -27 13.1 2.231 3.216 162 17.9 22:59 ( 0, 28) 170P/Christensen Now it is 17.9 mag (July 16, Toshihiko Ikemura, Hirohisa Sato). 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) July 22 3 11.34 8 44.6 3.139 2.969 71 17.9 3:20 (281, 31) July 29 3 19.39 8 55.3 3.059 2.976 75 17.8 3:28 (286, 36) P/2014 OL465 ( PanSTARRS ) It showed cometary activity in 2023, and brightened rapidly. Now it is 17.4 mag (June 22, ATLAS South Africa). Fading slowly. It will be fainter than 18 mag in August. 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) July 22 14 26.06 -38 39.9 3.010 3.446 106 17.8 20:51 ( 28, 9) July 29 14 31.24 -38 5.9 3.102 3.453 101 17.9 20:44 ( 30, 8) C/2019 O3 ( Palomar ) Now it is 17.8 mag (July 16, Yasukazu Ikari). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. 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) July 22 14 53.12 78 21.3 10.378 10.119 72 17.9 20:51 (172, 45) July 29 14 45.55 77 46.7 10.400 10.138 72 17.9 20:44 (170, 44) 287P/Christensen Now it is 17.7 mag (July 4, Observatoire SADR, Poroto). 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) July 22 23 12.48 -10 12.5 2.246 3.035 133 18.0 3:16 ( 0, 45) July 29 23 12.20 -10 59.5 2.185 3.037 140 17.9 2:48 ( 0, 44) 99P/Kowal 1 It brightened up to 15.9 mag in 2022 spring (May 5, Toshiyuki Takahashi). Now it is 17.3 mag (July 14, ATLAS Chile). It stays 18 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) July 22 15 51.40 -23 35.0 4.398 5.012 122 17.9 20:51 ( 15, 30) July 29 15 51.53 -23 33.6 4.500 5.020 115 18.0 20:44 ( 21, 28) C/2021 C5 ( PanSTARRS ) It was predicted to brighten up to 16 mag in 2023. But actually, it is very faint as 18.8 mag (June 26, Jean-Claude Merlin). Fading slowly. 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) July 22 18 47.32 -73 28.2 2.890 3.582 125 18.5 22:49 ( 0,-18) July 29 18 37.14 -71 48.7 2.935 3.610 124 18.5 22:11 ( 0,-17)