Weekly Information about Bright Comets (2023 May 13: South)

Japanese version Home page	Updated on May 14, 2023
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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/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 10.2 mag (Apr. 23, Jose Guilherme de S. Aguiar). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in August. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 4 59.31 -21 27.7 3.116 2.536 46 9.5 18:34 ( 80, 25) May 20 5 9.31 -19 26.8 3.218 2.594 44 9.6 18:30 ( 80, 21) C/2020 V2 ( ZTF ) Now it is 10.6 mag (Apr. 9, Ken-ichi Kadota). It stays 10 mag for a while. Now it is not observable. It will appear in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 2 42.77 24 14.9 3.217 2.229 10 10.0 5:18 (250,-15) May 20 2 47.61 23 5.1 3.202 2.232 13 10.0 5:22 (248, -9) C/2023 E1 ( ATLAS ) It has large but very diffuse coma. It seems to brighten up to 9-10 mag in July. Now it is 11.7 mag (May 9, Michael Jager). Brightening 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 August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 12 10.49 60 50.2 0.769 1.297 92 11.8 20:47 (180, -6) May 20 12 10.70 64 3.2 0.768 1.233 86 11.3 20:20 (180, -9) C/2021 T4 ( Lemmon ) It is expected to brighten up to 8 mag in July. Now it is 14.6 mag (Apr. 24, N. Paul, E. Cortes). It will brighten rapidly after this. In the Northern Hemisphere, it is not observable now, but it will appear in June. In the Southern Hemisphere, it stays observable in good condition. At the high light, it will be observable in excellent condition in the Southern Hemisphere, but it will be very low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 0 42.73 -11 33.0 2.358 1.847 48 12.0 5:18 (263, 30) May 20 0 43.64 -12 9.8 2.173 1.793 54 11.7 5:22 (258, 37) C/2019 U5 ( PanSTARRS ) Now it is 11.7 mag (May 11, Osamu Miyazaki). Fading slowly. It will be getting lower gradually after this, and it will be unobservable in July in the Northern Hemisphere, or in August in the Southern Hemisphere. But it will be observable again in September in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 10 41.68 -3 36.7 3.157 3.646 111 11.7 19:18 (180, 59) May 20 10 35.27 -4 2.5 3.286 3.654 103 11.8 18:44 (180, 59) C/2022 A2 ( PanSTARRS ) Now it is 11.1 mag (Apr. 28, Osamu Miyazaki). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now, but it will be observable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 0 42.83 38 26.1 2.724 2.042 39 11.8 5:18 (223, -3) May 20 0 48.19 37 47.7 2.726 2.090 42 11.9 5:22 (220, 1) 364P/PanSTARRS Now it is 12.0 mag (Apr. 27, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it is not observable now, but it will appear in June. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 0 27.61 -9 8.3 0.439 0.801 49 11.9 5:18 (258, 32) May 20 0 46.53 -8 51.9 0.522 0.807 52 12.2 5:22 (255, 34) C/2020 K1 ( PanSTARRS ) Now it is 12.2 mag (Apr. 30, Marco Goiato). Fading slowly. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. 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) May 13 20 53.73 -62 22.3 2.596 3.074 108 12.3 5:18 (356, 63) May 20 20 59.88 -66 6.8 2.541 3.075 112 12.3 5:12 ( 0, 59) 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 11.6 mag (Apr. 23, Jose Guilherme de S. Aguiar). Fading gradually. In the Northern Hemisphere, it is not observable now, but it will appear in September. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 5 24.35 -13 0.3 2.732 2.128 44 12.5 18:34 ( 92, 25) May 20 5 30.21 -13 55.2 2.846 2.209 42 12.7 18:30 ( 88, 22) 237P/LINEAR It brightened very rapidly as expected. Now it is 12.7 mag (Apr. 24, Ken-ichi Kadota). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 19 49.05 -12 22.1 1.343 1.987 114 12.6 4:28 (180, 67) May 20 19 54.35 -10 41.5 1.284 1.988 119 12.5 4:06 (180, 66) 81P/Wild 2 Now it is 13.3 mag (Apr. 24, Osamu Miyazaki). 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) May 13 17 46.23 -18 16.5 1.219 2.125 144 12.7 2:26 (180, 73) May 20 17 41.17 -18 14.2 1.217 2.165 152 12.8 1:54 (180, 73) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in last winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 11.9 mag (May 2, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 9 6.86 -30 57.0 5.326 5.543 97 12.9 18:34 (107, 79) May 20 9 9.62 -30 37.6 5.444 5.586 92 13.0 18:30 (101, 75) 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 (Apr. 28, Osamu Miyazaki). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 15 28.86 19 38.1 4.231 5.066 142 13.3 0:09 (180, 35) May 20 15 25.67 20 20.9 4.284 5.097 139 13.3 23:34 (180, 35) C/2021 S3 ( PanSTARRS ) It is expected to brighten up to 7 mag in early 2024. Now it is 14.3 mag (May 5, ATLAS Chile). Brightening gradually. 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 July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 5 55.49 -25 16.6 4.234 3.798 58 13.9 18:34 ( 83, 38) May 20 6 3.31 -24 45.0 4.200 3.728 55 13.8 18:30 ( 82, 34) 71P/Clark Now it is 13.0 mag (Apr. 25, Jose Guilherme de S. Aguiar). Fading slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in summer. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 23 51.95 -9 35.8 2.225 1.889 57 13.8 5:18 (252, 39) May 20 0 5.21 -8 25.7 2.198 1.923 60 14.0 5:22 (247, 42) 29P/Schwassmann-Wachmann 1 Now it is 13.7 mag (Apr. 19, W. Pei). It stays 14 mag for a while. It will be unobservable in June. But it will be observable again in August in the Northern Hemisphere, or in September in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 6 44.26 26 43.7 6.723 6.098 48 14.0 18:34 (137, 13) May 20 6 49.15 26 32.2 6.805 6.100 42 14.1 18:30 (134, 11) C/2021 Y1 ( ATLAS ) The brightness evolution is slower than originally predicted. Now it is 14.8 mag (May 7, ATLAS South Africa). It stays 14 mag for a while. 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) May 13 5 7.15 -26 28.2 2.497 2.038 52 14.0 18:34 ( 76, 29) May 20 5 22.45 -27 52.1 2.484 2.046 53 14.0 18:30 ( 74, 28) P/2018 HT3 ( NEOWISE ) Rob Matson discovered it as a new comet from SWAN images between Apr. 5 and 15. It was revealed to be an asteroid which has been observed also in 2012 and 2018. It approached to Sun down to 0.5 a.u. on Mar. 29. Now it is 13.6 mag (Apr. 20, Michael Jager). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it is not observable now, but it will appear in June. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 3 14.38 -60 53.8 0.396 1.013 79 14.0 5:18 (327, 26) May 20 3 10.62 -74 56.8 0.388 1.114 94 14.4 5:22 (341, 34) 77P/Longmore Now it is 13.9 mag (Apr. 27, Ken-ichi Kadota). 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) May 13 13 38.41 -31 28.4 1.413 2.364 154 14.1 22:15 (180, 87) May 20 13 31.88 -31 50.8 1.450 2.369 147 14.2 21:41 (180, 87) 126P/IRAS It will brighten rapidly up to 13.5 mag in summer. Now it is 15.4 mag (May 1, iTelescope Deep Sky Chile, Rio Hurtado). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in June. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 0 35.38 -16 15.5 2.232 1.807 52 14.8 5:18 (266, 34) May 20 0 47.16 -13 13.5 2.164 1.784 54 14.6 5:22 (260, 37) C/2021 X1 ( Maury-Attard ) Now it is 14.9 mag (Mar. 19, Masayoshi Yoshimi). It stays 14 mag for a while. Now it is not observable. It will appear soon in the Southern Hemisphere, or in June in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 2 40.20 0 59.6 4.172 3.237 19 14.7 5:18 (269, -1) May 20 2 41.34 1 46.0 4.134 3.234 23 14.7 5:22 (264, 5) 185P/Petriew It is expected to brighten up to 11 mag in July. Now it is 19.0 mag (May 8, iTelescope Deep Sky Chile, Rio Hurtado). Brightening rapidly. It stays extremely low in the Northern Hemisphere. But it will become high in autumn. It locates somewhat low in the Southern Hemisphere. Recently it is much fainter than this ephemeris. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 23 59.02 10 28.3 1.694 1.272 48 15.2 5:18 (236, 24) May 20 0 27.36 12 54.4 1.633 1.211 47 14.7 5:22 (233, 23) 199P/Shoemaker 4 Now it is 16.1 mag (May 1, J. L. Virlichie, P. Traverse, H. Roy, G. Houdin). It stays 15 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) May 13 18 35.84 -18 2.4 2.194 2.975 132 15.0 3:16 (180, 73) May 20 18 35.07 -18 50.8 2.119 2.965 139 14.9 2:47 (180, 74) C/2022 L2 ( ATLAS ) Now it is 15.5 mag (May 10, ATLAS Chile). It stays 15 mag for a while. It stays observable in good condition. 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) May 13 17 54.57 22 29.3 3.421 4.073 123 15.2 2:35 (180, 33) May 20 17 43.35 22 51.8 3.316 4.024 128 15.1 1:56 (180, 32) C/2022 W3 ( Leonard ) It will brighten up to 13 mag in summer. Now it is 16.3 mag (Apr. 9, Ken-ichi Kadota). 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 August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 2 4.05 63 9.1 2.019 1.516 46 15.3 5:18 (210,-27) May 20 2 0.51 63 9.2 1.975 1.480 46 15.2 5:22 (208,-24) C/2020 S4 ( PanSTARRS ) Now it is 14.8 mag (Apr. 19, W. Pei). Fading slowly. It will be unobservable in August in the Southern Hemisphere, or in September in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 9 49.14 27 59.9 3.359 3.480 88 15.2 18:34 (178, 27) May 20 9 55.81 27 28.7 3.466 3.496 83 15.3 18:30 (174, 27) C/2022 E2 ( ATLAS ) Now it is 15.4 mag (May 3, ATLAS South Africa). It stays 15 mag for a while. It will be getting lower gradually after this, and it will be unobservable in June in the Northern Hemisphere, or in July in the Southern Hemisphere. But it will be observable again in September in the Southern Hemisphere. 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) May 13 8 55.05 -3 26.0 5.566 5.585 85 15.3 18:34 (152, 55) May 20 8 54.62 -2 33.1 5.644 5.543 79 15.3 18:30 (144, 52) C/2021 G2 ( ATLAS ) It will brighten up to 14 mag from 2024 to 2025. Now it is 15.2 mag (Apr. 17, Ken-ichi Kadota). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 8 53.67 -30 46.4 6.025 6.185 94 15.3 18:34 (103, 76) May 20 8 57.22 -30 5.4 6.069 6.155 90 15.3 18:30 (100, 72) 117P/Helin-Roman-Alu 1 Now it is 16.0 mag (May 1, iTelescope Deep Sky Chile, Rio Hurtado). It stays 15 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) May 13 23 57.87 -8 22.1 3.844 3.382 55 15.4 5:18 (252, 37) May 20 0 5.20 -7 42.8 3.776 3.395 60 15.4 5:22 (246, 42) C/2023 B2 ( ATLAS ) Brightened rapidly. Now it is 15.3 mag (May 2, Yukihiro Sugiyama). It will fade out rapidly after this. It will be fainter than 18 mag in July. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 12 40.42 -13 16.8 1.026 1.926 142 15.5 21:18 (180, 68) May 20 12 48.56 -9 21.4 1.106 1.965 136 15.7 20:58 (180, 64) C/2020 R7 ( ATLAS ) It brightened up to 13.4 mag in last summer (July 7, Giuseppe Pappa). Now it is 15.4 mag (May 2, Ken-ichi Kadota). Fading slowly. 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) May 13 17 14.73 26 37.6 3.073 3.766 126 15.5 1:55 (180, 28) May 20 17 2.95 28 37.0 3.100 3.807 128 15.5 1:16 (180, 26) 118P/Shoemaker-Levy 4 It brightened up to 12.4 mag in winter (Feb. 10, Taras Prystavski). Now it is 15.8 mag (Apr. 20, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower 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) May 13 9 34.80 19 10.0 2.091 2.292 88 16.3 18:34 (174, 36) May 20 9 45.25 18 30.5 2.202 2.324 83 16.5 18:30 (170, 36) 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 16.6 mag (May 9, Michael Jager). It stays 16 mag for a while. It stays observable in good condition. 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) May 13 14 42.62 2 42.3 5.654 6.599 157 16.5 23:19 (180, 52) May 20 14 37.40 2 56.9 5.624 6.534 151 16.4 22:46 (180, 52) C/2022 A3 ( Lemmon-ATLAS ) Now it is 16.5 mag (Apr. 29, ATLAS Chile). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 8 18.92 -9 24.4 3.961 3.903 79 16.4 18:34 (133, 56) May 20 8 19.40 -9 51.3 4.043 3.884 73 16.4 18:30 (125, 53) C/2022 P1 ( NEOWISE ) It brightened up to 9.7 mag in autumn (Oct. 23, Marco Goiato). Now it is 16.7 mag (May 2, ATLAS South Africa). It will fade out rapidly after this. It will be fainter than 18 mag in June. 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) May 13 15 8.07 -39 27.5 1.616 2.584 158 16.4 23:42 ( 0, 86) May 20 14 38.09 -36 3.2 1.679 2.645 158 16.8 22:45 ( 0, 89) 119P/Parker-Hartley It continued brightening even after the perihelion passage, and brightened up to 13.9 mag in winter (Jan. 20, Hidenori Nohara). Now it is 17.1 mag (May 7, ATLAS-HKO, Haleakala). Fading slowly. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in July. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 8 25.44 23 38.6 3.110 2.947 71 16.7 18:34 (157, 28) May 20 8 34.49 23 8.6 3.222 2.972 66 16.9 18:30 (153, 27) C/2019 E3 ( ATLAS ) Very far object. Now it is 17.0 mag (May 2, 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) May 13 5 6.23 -67 49.1 10.342 10.361 88 16.8 18:34 ( 28, 38) May 20 5 9.48 -67 33.3 10.330 10.357 88 16.8 18:30 ( 28, 37) 94P/Russell 4 Now it is 17.2 mag (May 3, ATLAS-HKO, Haleakala). Fading slowly. It will be fainter than 18 mag in August. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 9 12.38 22 55.3 2.131 2.228 81 16.8 18:34 (168, 31) May 20 9 23.32 21 52.8 2.205 2.227 78 16.9 18:30 (165, 32) C/2022 U4 ( Bok ) Now it is 17.0 mag (Apr. 15, J. Linder). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will be observable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 12 59.63 55 53.2 2.664 3.016 100 16.9 21:36 (180, -1) May 20 13 0.24 55 15.8 2.697 2.997 97 16.9 21:09 (180, 0) C/2020 F2 ( ATLAS ) Now it is 17.0 mag (Apr. 11, Michael Jager). 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 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) May 13 12 32.88 13 50.3 8.326 8.989 128 16.9 21:09 (180, 41) May 20 12 29.38 14 4.0 8.431 8.997 121 17.0 20:38 (180, 41) 12P/Pons-Brooks It returns for the first time in 70 years. It will brighten up to 4.5 mag in 2024 spring. Now it is 16.9 mag (May 9, Jean-Claude Merlin). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 19 34.70 45 3.8 4.379 4.562 93 17.1 4:14 (180, 10) May 20 19 32.18 46 42.1 4.273 4.495 96 17.0 3:44 (180, 8) C/2022 JK5 ( PanSTARRS ) The ATLAS search program detected its cometary activity in April. Now it is 16.5 mag (May 9, 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) May 13 22 44.77 -25 12.1 2.691 2.691 79 17.0 5:18 (259, 61) May 20 22 55.87 -24 51.0 2.621 2.696 83 17.0 5:22 (253, 65) C/2018 U1 ( Lemmon ) It brightened up to 13.6 mag in 2021 (June 17, 2021, R. Carstens). Now it is 16.9 mag (May 2, ATLAS South Africa). It stays 17 mag for a while. 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) May 13 11 40.57 -71 12.2 5.967 6.508 118 17.0 20:16 ( 0, 54) May 20 11 28.27 -70 9.5 6.014 6.540 117 17.1 19:37 ( 0, 55) 80P/Peters-Hartley Now it is 16.4 mag (May 10, Michael Jager). Fading gradually. It will be fainter than 18 mag in July. In the Northern Hemisphere, it stays observable in good condition. It looks diffuse, but it has a large coma. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 22 3.92 13 7.9 2.265 2.228 74 17.0 5:18 (207, 38) May 20 22 10.15 15 23.9 2.236 2.272 79 17.2 5:22 (198, 38) 103P/Hartley 2 It is expected to brighten up to 7.5 mag in October, and it will be observable in excellent condition. Now it is 19.0 mag (Apr. 28, J. L. Virlichie, P. Traverse, H. Roy, G. Houdin). It will brighten rapidly after this. It stays observable in good condition. In the Southern Hemisphere, it becomes low temporarily around the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 21 36.04 1 0.8 1.969 2.136 85 17.4 5:18 (203, 52) May 20 21 46.92 2 45.0 1.838 2.075 88 17.1 5:22 (195, 51) 116P/Wild 4 It brightened up to 12.7 mag in last year (Feb. 27, 2022, Jose Guilherme de S. Aguiar). Now it is 17.7 mag (May 2, ATLAS South Africa). Fading slowly. 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) May 13 20 7.18 -24 40.6 2.389 2.934 112 17.1 4:47 (180, 80) May 20 20 8.21 -24 48.2 2.328 2.960 119 17.1 4:20 (180, 80) 72P/Denning-Fujikawa It will brighten up to 16 mag in June. Now it is 18.3 mag (May 10, Hidetaka Sato). It will turn to fade out rapidly after brightening. It will be fainter than 18 mag in July. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it will be unobservable in July. In its last apparition in 2014, it was re-observed after 36-year blank. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 0 35.35 -4 8.3 1.357 0.973 45 17.9 5:18 (255, 27) May 20 1 10.39 0 36.1 1.348 0.908 42 17.2 5:22 (251, 24) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 14 mag in 2031. Now it is 16.7 mag (Apr. 14, Thomas Lehmann). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it will be getting higher gradually. In the Northern Hemisphere, it is not observable until 2030. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 3 0.05 -57 19.0 17.900 17.675 75 17.2 5:18 (323, 26) May 20 3 3.23 -57 24.3 17.838 17.650 77 17.2 5:22 (322, 30) 180P/NEAT Now it is 17.3 mag (Apr. 17, Masayoshi Yoshimi). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 9 41.67 32 12.8 2.403 2.531 85 17.2 18:34 (177, 23) May 20 9 50.22 31 3.9 2.475 2.524 81 17.3 18:30 (173, 24) C/2021 E3 ( ZTF ) It brightened up to 9.3 mag in early summer in 2022 (June 5, Chris Wyatt). Now it is 17.4 mag (Apr. 28, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in June. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 6 54.58 -3 25.6 4.693 4.240 57 17.3 18:34 (116, 37) May 20 6 58.27 -2 29.4 4.845 4.303 52 17.5 18:30 (113, 33) 96P/Machholz 1 It approached to Sun down to 0.1 a.u. on Jan. 31. It was bright as 7.0-7.5 mag in early February (Feb. 5, Michael Jager). Now it is 16.7 mag (May 2, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in June. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 19 44.92 -12 6.8 1.448 2.091 115 17.3 4:25 (180, 67) May 20 19 31.76 -13 6.4 1.433 2.181 125 17.5 3:44 (180, 68) 287P/Christensen 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) May 13 22 29.71 -8 51.1 3.132 3.047 75 17.5 5:18 (231, 53) May 20 22 37.07 -8 33.1 3.037 3.044 80 17.4 5:22 (222, 57) 219P/LINEAR It has not been observed yet in this apparition. Now it is mag ( , ). 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) May 13 18 29.48 -14 47.8 2.132 2.924 133 17.6 3:09 (180, 70) May 20 18 28.10 -14 10.8 2.047 2.901 140 17.4 2:40 (180, 69) 99P/Kowal 1 It brightened up to 15.9 mag in 2022 spring (May 5, Toshiyuki Takahashi). Now it is 16.9 mag (Apr. 27, Yasukazu Ikari). 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) May 13 16 18.63 -24 37.2 3.951 4.932 164 17.5 0:59 (180, 80) May 20 16 14.92 -24 32.6 3.936 4.939 171 17.5 0:28 (180, 80) C/2019 O3 ( Palomar ) Now it is 17.4 mag (Apr. 22, ATLAS-HKO, Haleakala). 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) May 13 17 42.82 79 0.0 10.044 9.932 80 17.7 2:21 (180,-24) May 20 17 26.41 79 33.0 10.081 9.950 79 17.7 1:37 (180,-25) C/2020 H6 ( ATLAS ) Now it is 17.9 mag (Apr. 8, Mt. Lemmon Survey). 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) May 13 18 52.10 61 17.7 6.449 6.524 89 17.7 3:31 (180, -6) May 20 18 49.66 62 13.0 6.477 6.559 90 17.8 3:01 (180, -7) C/2022 U2 ( ATLAS ) It brightened up to 9.6 mag in late January (Jan. 25, Toshihiko Ikemura, Hirohisa Sato). Now it is 16.8 mag (May 8, Giuseppe Pappa). Fading rapidly. It will be fainter than 18 mag soon. 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) May 13 8 0.83 -11 19.3 2.141 2.134 75 17.9 18:34 (125, 55) May 20 8 11.89 -12 30.6 2.273 2.205 73 18.4 18:30 (120, 53) P/2023 B1 ( PanSTARRS ) It moves along an almost circular orbit. It brightened up to 16.2 mag temporarily in outburst (Jan. 27, Toshihiko Ikemura, Hirohisa Sato). Now it is 17.5 mag (May 3, Kuban State University Astrophysical Observatory). Fading gradually. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 10 35.61 25 6.9 5.901 6.141 99 18.1 19:13 (180, 30) May 20 10 36.61 24 44.7 6.007 6.141 92 18.2 18:46 (180, 30) C/2021 C5 ( PanSTARRS ) It was predicted to brighten up to 16 mag in 2023. But actually, it is very faint as 18.6 mag (May 3, iTelescope Deep Sky Chile, Rio Hurtado). It stays 19 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) May 13 21 6.44 -76 48.2 2.898 3.355 108 18.1 5:18 (357, 48) May 20 21 6.94 -77 9.6 2.870 3.373 111 18.1 5:20 ( 0, 48) 452P/2022 B5 ( Sheppard-Jewitt ) Now it is 19.2 mag (Apr. 13, A. Diepvens). It stays 19 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. Francois Kugel reported it seems fragmented. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 10 11.01 15 51.7 3.928 4.179 97 18.8 18:48 (180, 39) May 20 10 14.19 15 32.7 4.030 4.180 91 18.9 18:30 (178, 40) C/2022 Q2 ( ATLAS ) It was observed at 17 mag in 2022 autumn. It was predicted to be observable at 17 mag also in 2023 spring. But actually, it is extremely faint as 19.5 mag (May 3, J. L. Virlichie, P. Traverse, H. Roy). 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) May 13 18 7.96 22 15.2 1.375 2.092 121 19.7 2:49 (180, 33) May 20 17 29.28 24 11.6 1.358 2.146 129 19.8 1:43 (180, 31) 280P/Larsen In the last apparition, it had faded before the perihelion passage. It was expected to brighten up to 17 mag if it would become as bright as its last apparition. But actually, it is extremely faint as 22 mag (Apr. 8, Giuseppe Pappa). It stays 22 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 13 13 50.28 7 33.7 1.800 2.701 146 21.6 22:27 (180, 48) May 20 13 47.59 7 28.3 1.834 2.691 140 21.6 21:56 (180, 48)