Weekly Information about Bright Comets (2022 Mar. 19: North)

Japanese version Home page	Updated on March 21, 2022
Last week South Next week

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 O3 ( PanSTARRS ) It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). Now it is not observable. It is expected to brighten up to 4.5 mag in April. However, it is not observable at the high light. In the Northern Hemisphere, it will appear at 6 mag in mid May, and it stays observable in good condition after that while the comet will be fading. In the Southern Hemisphere, it is not observable until August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 0 24.42 -0 41.9 1.906 0.930 7 11.1 19:34 ( 98,-12) Mar. 26 0 46.32 -0 54.6 1.758 0.780 7 10.1 19:41 ( 99,-14) 19P/Borrelly Now it is bright as 9.7 mag (Mar. 6, Marco Goiato). It stays bright as 9-10 mag until March. In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it stays extremely low after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 3 37.84 31 45.5 1.567 1.413 62 10.2 19:34 (103, 44) Mar. 26 4 1.94 34 37.7 1.630 1.445 61 10.6 19:41 (107, 43) C/2021 F1 ( Lemmon-PanSTARRS ) Brightened very rapidly. Now it is very bright as 10.0 mag (Mar. 9, Michael Jager). It stays 10-11 mag until spring. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it is not observable until late May. But it will be observable in good condition after that. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 0 8.54 34 30.0 1.684 1.047 35 10.4 19:34 (128, 7) Mar. 26 0 33.30 30 37.2 1.769 1.016 28 10.3 19:41 (126, 3) C/2019 L3 ( ATLAS ) Now it is 9.9 mag (Mar. 9, Osamu Miyazaki). In the Northern Hemisphere, it will be getting lower after this, and it will be unobservable in May. In the Southern Hemisphere, it stays observable until July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 37.05 18 29.5 3.289 3.609 100 10.4 19:34 ( 33, 71) Mar. 26 6 39.70 17 28.3 3.403 3.620 94 10.5 19:41 ( 48, 66) C/2017 K2 ( PanSTARRS ) Now it is bright as 11.0 mag (Mar. 6, Osamu Miyazaki). The brightness evolution is slower than originally expected. It is expected to be observable at 7 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it stays observable in good condition until autumn. However, it is not observable at the high light from autumn to 2023 summer. In the Southern Hemisphere, it stays observable in good condition after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 18 50.14 11 26.3 3.811 3.701 76 10.7 4:41 (297, 50) Mar. 26 18 52.56 11 31.8 3.653 3.637 81 10.6 4:31 (301, 52) 22P/Kopff Now it is 11.8 mag (Mar. 4, Thomas Lehmann). In the Northern Hemisphere, it stays extremely low until spring. In the Southern Hemisphere, it stays observable at 11 mag until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 20 56.67 -16 13.8 2.068 1.552 46 10.9 4:41 (296, 8) Mar. 26 21 17.92 -14 56.8 2.039 1.554 47 10.9 4:31 (295, 8) C/2019 T4 ( ATLAS ) Now it is bright as 11.8 mag (Mar. 7, Marco Goiato). It stays 11-12 mag until July. It stas observable in good condition for a long time. It locates high after this also in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 11 56.53 -24 7.5 3.374 4.297 155 11.5 0:13 ( 0, 31) Mar. 26 11 53.70 -22 44.2 3.345 4.288 158 11.5 23:38 ( 0, 32) C/2021 A1 ( Leonard ) It brightened up to 3 mag from mid December to late December. Now it is fading. It has already faded down to 11.0 mag (Feb. 23, Martin Masek). In the Northern Hemisphere, it will become observable again at 13 mag in late April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 21 13.92 -34 57.6 2.000 1.565 50 12.0 4:41 (308, -7) Mar. 26 21 8.71 -35 11.2 1.973 1.671 57 12.2 4:31 (311, -4) 9P/Tempel 1 Now it is 13.4 mag (Mar. 4, Thomas Lehmann). It stays 12-13 mag for a while. But actually, it is fainter than this ephemeris recently. It is observable in excellent condition in the Southern Hemisphere. It locates low until May in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 19 38.32 -22 54.8 1.670 1.550 65 12.1 4:41 (314, 16) Mar. 26 19 59.63 -22 47.8 1.635 1.558 67 12.2 4:31 (314, 16) 104P/Kowal 2 It brightened very rapidly up to 9.2 mag in winter (Jan. 31, Chris Wyatt). Now it is fading. But it is still bright as 11.3 mag (Mar. 9, Osamu Miyazaki). It will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 7.34 15 10.7 0.892 1.379 93 12.4 19:34 ( 44, 64) Mar. 26 6 35.46 15 33.2 0.970 1.434 93 13.0 19:41 ( 47, 64) C/2021 E3 ( ZTF ) Now it is 14.9 mag (Nov. 28, Thomas Lehmann). It is expected to brighten up to 11 mag from spring to summer. In the Southen Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it is hardly observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 20 34.05 -21 53.0 2.526 2.080 52 13.2 4:41 (304, 8) Mar. 26 20 42.01 -24 3.4 2.370 2.036 58 13.0 4:31 (307, 8) 67P/Churyumov-Gerasimenko It brightened up to 8.5 mag from autumn to winter (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 11.8 mag (Mar. 9, Osamu Miyazaki). It stays observable in good condition for a long time. It locates somewhat low in the Southern Hemisphere, Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 8 32.22 24 50.2 1.233 1.988 125 13.1 20:45 ( 0, 80) Mar. 26 8 37.70 24 3.3 1.348 2.043 120 13.5 20:23 ( 0, 79) C/2020 Y2 ( ATLAS ) Now it is 15.7 mag (Feb. 21, P. Camilleri, J. Oey, R. Groom, A. Pearce). It was expected to brighten up to 13 mag in spring. But actually, it is fainter than this ephemeris recently. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until autumn. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 7 54.60 -67 13.6 2.920 3.253 100 13.4 20:04 ( 0,-12) Mar. 26 7 27.57 -64 51.2 2.925 3.236 99 13.4 19:41 ( 3,-10) 45P/Honda-Mrkos-Pajdusakova It has not been observed yet in this apparition. It will brighten very rapidly up to 9 mag in May. The condition is very bad in this apparition. It is observable only in the extremely low sky from mid May to mid July in the Northern Hemisphere, or from early June to early August in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 23 11.27 -7 19.3 1.866 0.918 12 14.7 4:41 (270,-13) Mar. 26 23 43.33 -3 53.8 1.783 0.823 10 13.5 4:31 (265,-14) 116P/Wild 4 Now it is 12.9 mag (Mar. 8, Michael Jager). It is observable at 13 mag in good condition until early summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 9 26.54 19 25.5 1.502 2.350 139 13.7 21:39 ( 0, 74) Mar. 26 9 24.95 19 15.2 1.542 2.334 132 13.6 21:10 ( 0, 74) 29P/Schwassmann-Wachmann 1 Now it is bright as 12.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable until April in the Southern Hemisphere, or until May in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 4 28.28 29 6.1 6.199 5.968 72 13.8 19:34 ( 93, 53) Mar. 26 4 32.16 29 4.0 6.306 5.970 65 13.8 19:41 ( 97, 47) C/2020 V2 ( ZTF ) Now it is 13.4 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it stays unobservable until 2023 summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 11 56.57 59 23.7 4.280 4.873 121 14.0 0:13 (180, 66) Mar. 26 11 41.50 60 20.8 4.277 4.816 117 14.0 23:25 (180, 65) C/2019 U5 ( PanSTARRS ) Now it is 14.1 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low in 2022, but it will be observable in good condition in 2023. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 16 27.14 38 53.0 4.516 4.901 107 14.1 4:41 (183, 86) Mar. 26 16 20.44 39 56.6 4.417 4.862 110 14.0 4:08 (180, 85) 117P/Helin-Roman-Alu 1 Now it is 15.3 mag (Feb. 23, Thomas Lehmann). It will brighten up to 13 mag in summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 18 32.53 -26 12.9 3.088 3.089 80 14.3 4:41 (329, 22) Mar. 26 18 40.13 -26 24.6 2.987 3.083 86 14.2 4:31 (332, 23) C/2020 J1 ( SONEAR ) It brightened up to 12.3 mag from spring to summer (June 15, Marco Goiato). Now it is fading. It has already faded down to 14.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 13 41.25 22 58.3 3.677 4.533 145 14.2 1:57 ( 0, 78) Mar. 26 13 31.48 24 45.4 3.699 4.574 147 14.3 1:20 ( 0, 80) C/2020 R7 ( ATLAS ) Now it is 15.7 mag (Feb. 2, Thomas Lehmann). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time, although it became low temporarily in February. In the Northern Hemisphere, it is not observable until August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 22 42.78 -54 22.5 3.920 3.455 55 14.4 4:41 (318,-30) Mar. 26 22 45.17 -54 7.6 3.819 3.420 59 14.3 4:31 (318,-28) C/2021 P4 ( ATLAS ) Now it is 14.3 mag (Mar. 8, Thomas Lehmann). It is expected to brighten up to 11 mag in summer. In the Northern Hemisphere, it stays observable in good condition until June when it brightens up to 11 mag. But it is not observable after the high light. In the Souther Hemisphere, it is not observable until October. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 0 43.15 54 20.4 2.678 2.278 56 14.7 19:34 (142, 23) Mar. 26 1 3.25 55 18.6 2.627 2.196 54 14.5 19:41 (143, 22) C/2020 K1 ( PanSTARRS ) Now it is 15.2 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until November. But it becomes unobservable after that. In the Southern Hemisphere, it stays observable in good condition after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 18 59.64 17 46.4 5.121 4.947 74 14.9 4:41 (287, 52) Mar. 26 19 1.32 17 58.2 4.988 4.900 79 14.8 4:31 (290, 55) C/2020 M5 ( ATLAS ) Now it is 14.3 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). It became brighter after the perihelion passage. It stays observable at 14-15 mag for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 11 33.04 9 10.9 2.657 3.642 170 14.9 23:44 ( 0, 64) Mar. 26 11 20.66 8 33.6 2.717 3.679 162 15.0 23:04 ( 0, 63) C/2018 U1 ( Lemmon ) Now it is 15.9 mag (Mar. 5, Thomas Lehmann). It stays at 15-16 mag for a long time. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it locates extremely low in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 17 17.79 -40 8.6 4.897 5.101 96 15.0 4:41 (350, 14) Mar. 26 17 14.68 -41 22.5 4.791 5.112 103 15.0 4:31 (354, 13) 4P/Faye It brightened up to 10.6 mag in autumn (Oct. 10, Osamu Miyazaki). Now it is fading. It has already faded down to 13.7 mag (Feb. 26, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 46.54 13 57.2 2.001 2.430 103 15.1 19:34 ( 22, 68) Mar. 26 6 54.10 14 17.7 2.127 2.474 98 15.4 19:41 ( 37, 65) C/2021 U5 ( Catalina ) Now it is 15.3 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It continues brightening even after the perihelion passage. It is observable at 15 mag in good condition for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 10 17.23 -10 30.2 1.499 2.431 153 15.2 22:30 ( 0, 45) Mar. 26 10 18.21 -7 29.1 1.538 2.450 149 15.3 22:03 ( 0, 48) 73P/Schwassmann-Wachmann 3 Now it is 16.9 mag (Mar. 2, K. Sarneczky). It is expected to brighten up to 11 mag from summer to autumn. It stays observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes extremely low from August to September. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 10 6.08 31 45.6 1.316 2.176 140 15.9 22:18 ( 0, 87) Mar. 26 9 57.07 32 1.2 1.311 2.115 132 15.7 21:41 ( 0, 87) C/2020 T2 ( Palomar ) It brightened up to 9.5 mag in early summer in 2021 (June 27, Marco Goiato). Now it is fading. It has faded down to 12.7 mag in autumn (Nov. 22, Thomas Lehmann). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it is not observable until June when the comet will fade down to 17 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 21 57.73 -31 5.3 4.186 3.493 40 15.7 4:41 (300,-12) Mar. 26 22 7.67 -30 55.0 4.182 3.551 45 15.9 4:31 (300,-11) C/2020 PV6 ( PanSTARRS ) Now it is 15.9 mag (Mar. 2, ATLAS-MLO, Mauna Loa). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 14 27.56 42 44.4 2.269 2.961 125 15.8 2:44 (180, 82) Mar. 26 14 1.92 44 19.7 2.286 3.007 128 16.0 1:51 (180, 81) 70P/Kojima Now it is 16.0 mag (Mar. 9, Toshihiko Ikemura, Hirohisa Sato). It is bright as 14.8 mag visually (Mar. 1, Sandor Szabo). It will be fading after this, and it will be fainter than 18 mag in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 11 33.76 13 1.4 1.301 2.282 166 16.0 23:45 ( 0, 68) Mar. 26 11 29.54 13 32.3 1.344 2.308 160 16.1 23:14 ( 0, 68) C/2020 H6 ( ATLAS ) Now it is 15.9 mag (Mar. 6, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16 mag from 2021 to 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 16 20.67 26 50.2 4.446 4.889 110 16.1 4:36 ( 0, 82) Mar. 26 16 20.34 28 45.2 4.406 4.904 114 16.1 4:08 ( 0, 84) 325P/Yang-Gao Now it is 19.2 mag (Feb. 28, Hidetaka Sato). It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than predicted by 3 mag. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 18 37.72 -30 58.1 1.223 1.436 80 16.3 4:41 (331, 17) Mar. 26 19 1.33 -29 6.1 1.184 1.432 81 16.2 4:31 (329, 18) 110P/Hartley 3 It brightened rapidly. Now it is 15.8 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a while. But it will fade out rapidly after this, and it will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 7 53.08 13 2.4 1.987 2.623 119 16.4 20:06 ( 0, 68) Mar. 26 7 55.83 12 48.8 2.080 2.638 113 16.5 19:41 ( 0, 68) 402P/2020 Q3 ( LINEAR ) First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.3 mag (Feb. 26, Toshihiko Ikemura, Hirohisa Sato). It will be unobservable in June. But it will become observable again at 17 mag from autum to winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 7.60 13 17.3 3.784 3.975 93 16.4 19:34 ( 42, 63) Mar. 26 6 11.33 14 4.0 3.892 3.981 87 16.5 19:41 ( 55, 59) C/2020 O2 ( Amaral ) Now it is 16.3 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It was observed at 15 mag in 2021. Now it is fading. It stays observable at 16-17 mag for a while in 2022. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 18 42.77 9 53.8 5.227 5.111 77 16.6 4:41 (301, 50) Mar. 26 18 44.86 11 22.7 5.150 5.127 83 16.6 4:31 (303, 54) 81P/Wild 2 Now it is 17.0 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 11.5 mag in 2022 winter. It stays observable while the comet will be brightening slowly. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 3 36.71 16 46.3 3.245 2.843 57 16.7 19:34 ( 85, 37) Mar. 26 3 45.14 17 20.5 3.287 2.803 53 16.6 19:41 ( 89, 32) C/2020 S4 ( PanSTARRS ) Now it is 16.9 mag (Mar. 8, Michael Jager). It will brighten up to 14 mag in early 2023. It stays observable in good condition until spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 4 33.19 9 37.8 4.733 4.500 70 16.7 19:34 ( 67, 44) Mar. 26 4 37.89 10 17.7 4.790 4.460 64 16.7 19:41 ( 74, 39) P/2021 N2 ( Fuls ) Brightened rapidly. Now it is 16.5 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It becomes too low to observe in mid March in the Southern Hemisphere, or in mid April in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 3 3.33 13 47.3 4.443 3.869 49 16.8 19:34 ( 87, 29) Mar. 26 3 11.22 14 10.8 4.526 3.877 44 16.8 19:41 ( 91, 24) 152P/Helin-Lawrence It will brighten up to 16 mag from spring to summer. It locates somewhat low in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 19 12.31 -21 56.4 3.287 3.115 71 16.9 4:41 (319, 21) Mar. 26 19 20.52 -21 55.1 3.199 3.119 76 16.8 4:31 (321, 22) C/2020 F7 ( Lemmon ) Now it is 17.2 mag (Jan. 18, J. Drummond). It brightened rapidly. It stays 17 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it locates extremely low, and it is observable only until April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 51.15 -45 11.2 5.155 5.412 99 16.9 19:34 ( 6, 10) Mar. 26 6 46.98 -44 34.2 5.217 5.421 96 16.9 19:41 ( 12, 9) 430P/2021 Q2 ( Scotti ) First return of a new periodic comet which brightened up to 17 mag in 2011. Now it is extremely faint as 20.4 mag (Feb. 4, J.-G. Bosch, F. Kugel, A. Klotz, J. Nicolas). It brightened up to 16.8 mag in October (Oct. 10, Ken-ichi Kadota), however, it has been fading after that. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 15 33.06 -15 42.4 1.109 1.852 123 16.9 3:49 ( 0, 39) Mar. 26 15 33.57 -15 58.4 1.084 1.886 129 16.9 3:22 ( 0, 39) C/2020 F2 ( ATLAS ) Now it is 16.9 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17-18 mag for a long time until 2024. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 14 20.23 -1 14.8 8.028 8.844 143 17.0 2:36 ( 0, 54) Mar. 26 14 16.22 -0 41.3 7.959 8.841 150 16.9 2:04 ( 0, 54) C/2019 O3 ( Palomar ) Now it is 16.9 mag (Mar. 6, Toshihiko Ikemura, Hirohisa Sato). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 19 23.06 55 44.6 9.235 9.084 78 17.0 4:41 (221, 54) Mar. 26 19 24.20 56 47.1 9.224 9.093 79 17.0 4:31 (218, 55) 99P/Kowal 1 Now it is 16.9 mag (Mar. 8, ATLAS-MLO, Mauna Loa). It will be observable at 17 mag in good condition in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 13 37.97 -9 25.1 3.805 4.707 151 17.1 1:54 ( 0, 45) Mar. 26 13 35.13 -9 12.7 3.759 4.707 159 17.0 1:23 ( 0, 46) C/2021 G2 ( ATLAS ) Now it is 16.9 mag (Mar. 8, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13-14 mag from 2024 to 2025. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 7 9.35 -29 2.5 7.933 8.267 106 17.2 19:34 ( 3, 26) Mar. 26 7 9.54 -28 30.4 7.961 8.229 102 17.2 19:41 ( 11, 26) C/2020 U5 ( PanSTARRS ) Now it is 17.1 mag (Mar. 4, A. Diepvens). It started fading before the perihelion passage. It was predicted to stay at 16 mag for a long time, but actually, it will be fainter than 18 mag in autumn. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2023. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 23 50.81 75 12.3 3.888 3.773 75 17.2 4:41 (196, 29) Mar. 26 23 57.34 74 59.5 3.935 3.767 73 17.3 4:31 (196, 29) 8P/Tuttle It brightened very rapidly, and brightened up to 8.9 mag (Sept. 11, Chris Wyatt). Now it is fading. It has already faded down to 18.5 mag (Feb. 11, J. L. Virlichie, P. Traverse, H. Roy). In the Southern Hemisphere, it stays observable after this while the comet will be fading. It is not observable after this in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 17 59.83 -56 17.4 2.634 2.789 88 17.2 4:41 (347, -3) Mar. 26 18 0.16 -56 36.3 2.604 2.855 94 17.4 4:31 (349, -3) 132P/Helin-Roman-Alu 2 It brightened up to 13.1 mag in autumn (Oct. 28, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. But it is still bright as 16.2 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). Sandor Szabo reported it is 15.0 mag visually on Mar. 1. It stays observable in good condition for a long time. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 4 16.38 16 18.2 2.252 2.078 67 17.4 19:34 ( 78, 45) Mar. 26 4 31.50 17 3.9 2.355 2.115 63 17.7 19:41 ( 82, 42) C/2021 Y1 ( ATLAS ) Now it is 17.6 mag (Mar. 4, A. Diepvens). It is expected to brighten up to 12 mag from winter to summer in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 spring. In the Southern Hemisphere, it is not observable until summer. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 2 9.63 43 58.8 5.347 4.832 54 17.5 19:34 (124, 32) Mar. 26 2 16.79 43 26.1 5.366 4.773 49 17.4 19:41 (126, 27) 52P/Harrington-Abell It brightened up to 16.4 mag from autumn to winter (Oct. 6, ATLAS-MLO, Mauna Loa). Now it is fading. It has already faded down to 18.0 mag (Feb. 28, Toshihiko Ikemura, Hirohisa Sato). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 12 32.55 -13 4.4 1.347 2.317 163 17.5 0:49 ( 0, 42) Mar. 26 12 25.73 -12 57.6 1.368 2.354 168 17.6 0:14 ( 0, 42) 254P/McNaught Now it is 17.7 mag (Mar. 8, Michael Jager). It continued brightening for a while even after the perihelion passage. It stays observable at 17 mag in good condition for a while. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 4 40.27 -1 42.2 4.322 4.121 71 17.5 19:34 ( 54, 38) Mar. 26 4 45.23 -0 43.6 4.431 4.140 66 17.6 19:41 ( 62, 33) 274P/Tombaugh-Tenagra Now it is 17.8 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag from November to March. It is observable in good condition in the Northern Hemisphere, but it locates low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 5 52.32 32 35.0 2.242 2.458 90 17.7 19:34 ( 89, 72) Mar. 26 6 2.09 32 47.1 2.323 2.455 85 17.7 19:41 ( 93, 67) C/2018 N2 ( ASASSN ) Now it is 17.8 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. It locates extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 14 38.18 46 35.8 7.411 7.979 121 17.7 2:54 (180, 79) Mar. 26 14 33.64 46 56.0 7.442 8.026 122 17.7 2:22 (180, 78) A/2021 X1 Now it is 17.2 mag (Mar. 8, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15-16 mag in 2023. Cometary activity was detected by Cristovao Jacques on Dec. 12, and by Luca Buzzi and Andrea Aletti on Feb. 23. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 6 29.00 -18 17.5 4.869 5.109 98 17.7 19:34 ( 15, 35) Mar. 26 6 25.10 -17 18.2 4.927 5.064 92 17.7 19:41 ( 26, 33) C/2017 Y2 ( PanSTARRS ) Now it is 17.1 mag (Feb. 28, Hidetaka Sato). It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 15 17.64 -40 56.7 5.521 6.048 117 17.7 3:34 ( 0, 14) Mar. 26 15 10.56 -41 28.3 5.458 6.082 124 17.7 2:59 ( 0, 13) C/2020 U4 ( PanSTARRS ) Now it is 17.9 mag (Mar. 5, E. Bryssinck). It stays 17-18 mag for a long time from 2021 to 2022. It is observable in excellent condition in the Northern Hemisphere, In the Southern Hemisphere, it is not observable until June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 2 37.25 26 36.7 5.969 5.356 48 17.7 19:34 (103, 30) Mar. 26 2 37.91 26 33.0 6.061 5.355 41 17.7 19:41 (107, 23) C/2021 C5 ( PanSTARRS ) Now it is 17.4 mag (Mar. 3, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is observable only until May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 9 56.43 -16 18.9 3.583 4.448 146 17.8 22:08 ( 0, 39) Mar. 26 9 51.27 -16 23.9 3.585 4.406 141 17.7 21:36 ( 0, 38) 440P/2021 W2 ( Kobayashi ) First return of a new periodic comet which brightened up to 16.5 mag in 1997. Now it is 17.7 mag (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). It was fainter than originally predicted at the recovery, but it brightened very rapidly. It is observable in good condition from January to March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 8 27.86 19 38.4 1.306 2.059 126 17.8 20:41 ( 0, 74) Mar. 26 8 32.09 18 20.1 1.359 2.057 120 17.9 20:18 ( 0, 73) P/2020 V4 ( Rankin ) Now it is 17.6 mag (Feb. 20, ATLAS-MLO, Mauna Loa). It will be fainter than 18 mag soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 19 7 37.65 5 49.6 4.780 5.294 116 17.9 19:50 ( 0, 61) Mar. 26 7 38.45 6 8.8 4.883 5.303 109 17.9 19:41 ( 9, 61)