Weekly Information about Bright Comets (2026 Mar. 7: North)

Japanese version Home page	Updated on March 8, 2026
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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/2024 E1 ( Wierzchos ) It brightened up to 6.6 mag in January (Jan. 28, Chris Wyatt). Now it is 9.1 mag (Mar. 6, Virgilio Gonano). Fading rapidly. It will be getting lower gradually after this, and it will be unobservable in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 3 12.43 -7 55.4 1.183 1.109 60 8.7 19:24 ( 56, 29) Mar. 14 3 41.97 -0 38.3 1.319 1.222 61 9.3 19:30 ( 63, 33) 88P/Howell Now it is 10.5 mag (Feb. 24, Martin Masek). Fading slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. 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) Mar. 7 20 48.99 -20 1.6 2.020 1.364 36 9.9 4:58 (296, 1) Mar. 14 21 14.19 -18 28.4 2.001 1.359 37 9.8 4:48 (293, 1) C/2025 R3 ( PanSTARRS ) It became brighter than expected. It is expected to brighten up to 5 mag in April. Now it is 10.8 mag (Mar. 2, Mike Olason). It brightens up to 5 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in April. At the high light, it is observable in the low sky before the perihelion passage in the Northern Hemisphere, or after the perihelion in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 22 25.78 18 9.0 1.891 1.089 25 11.3 4:58 (251, 4) Mar. 14 22 28.98 18 33.2 1.747 0.968 26 10.6 4:48 (252, 8) C/2025 A6 ( Lemmon ) It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Now it is 10.5 mag (Feb. 13, Mitsunori Tsumura). It will fade out rapidly after this. In the Northern Hemisphere, it is not observable now, but it will appear in April. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 15 37.70 -62 46.4 1.916 2.236 95 10.7 4:42 ( 0, -8) Mar. 14 15 0.17 -64 30.5 1.901 2.335 102 10.9 3:38 ( 0,-10) 24P/Schaumasse It brightened up to 8.4 mag in January (Jan. 14, Mitsunori Tsumura). Now it is 10.3 mag (Mar. 7, Toru Yusa). Fading rapidly. 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) Mar. 7 15 27.60 5 50.1 0.650 1.402 115 11.2 4:30 ( 0, 61) Mar. 14 15 28.68 5 28.9 0.657 1.450 121 11.6 4:04 ( 0, 60) C/2026 A1 ( MAPS ) Kreutz sungrazer comet discovered furthest from Sun in history. It will approach to Sun down to 0.005 a.u. on Apr. 4. Now it is 12.2 mag (Mar. 4, Yoshimi Nagai). It is expected to brighten up to 6-7 mag when observable on the ground. In the Northern Hemisphere, it will be unobservable in late March. In the Southern Hemisphere, it will be unobservable temporarily in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 39.37 -14 6.7 1.257 1.023 52 13.1 19:24 ( 58, 18) Mar. 14 2 25.39 -10 22.4 1.233 0.847 43 12.2 19:30 ( 69, 12) 240P/NEAT It brightened up to 11.1 mag in winter (Nov. 15, Masayoshi Yoshimi). The component B also brightened rapidly up to 13.8 mag (Ded. 8, Masayoshi Yoshimi). Now it is 13.8 mag (Feb. 12, Toru Yusa). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 4 16.44 29 57.4 2.122 2.207 81 13.2 19:24 ( 88, 63) Mar. 14 4 28.56 31 1.6 2.216 2.222 77 13.4 19:30 ( 93, 59) 235P/LINEAR It became brighter than expected. Now it is 13.1 mag (Feb. 19, Ken-ichi Kadota). Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 16 41.70 -17 40.1 1.730 2.064 94 13.2 4:58 (346, 36) Mar. 14 16 51.12 -17 13.5 1.670 2.080 99 13.2 4:48 (349, 37) 78P/Gehrels 2 It will brighten up to 12 mag in summer. Now it is 14.5 mag (Jan. 16, Kunihiro Shima). Brightening slowly. Now it is not observable. It will appear in May 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) Mar. 7 23 40.52 0 18.0 3.166 2.195 9 13.7 19:24 ( 97, -8) Mar. 14 23 54.92 1 39.9 3.157 2.173 6 13.6 19:30 (101,-11) 29P/Schwassmann-Wachmann 1 Now it is 11.3 mag (Mar. 7, Toru Yusa). It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 11 18.07 -2 59.8 5.329 6.311 171 13.6 0:22 ( 0, 52) Mar. 14 11 15.00 -2 44.8 5.324 6.311 172 13.6 23:47 ( 0, 52) C/2026 B2 ( Sun-Gao ) Bright new comet discovered near Sun. It became brighter furthermore after the discovery, brightened up to 12.7 mag (Feb. 14, Mike Olason). Now it is 13.2 mag (Feb. 18, Mike Olason). It will fade out rapidly after this. It will be fainter than 18 mag in June. It stays extremely low 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) Mar. 7 21 50.27 26 16.9 2.192 1.522 37 13.7 4:58 (249, 16) Mar. 14 22 15.16 28 48.1 2.257 1.578 36 14.0 4:48 (246, 16) C/2024 J3 ( ATLAS ) Now it is 14.9 mag (Feb. 9, Ken-ichi Kadota). Brightening slowly. It will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 20 1.93 5 44.5 5.088 4.485 47 14.3 4:58 (282, 26) Mar. 14 20 6.16 7 12.7 4.983 4.455 52 14.2 4:48 (283, 30) C/2024 T5 ( ATLAS ) Now it is 14.3 mag (Feb. 27, ATLAS Chile). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after June. It is expected to brighten up to 11 mag in next winter. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 54.84 -29 10.4 5.732 5.278 58 14.4 19:24 ( 44, 9) Mar. 14 2 59.59 -27 53.9 5.747 5.239 54 14.4 19:30 ( 50, 6) C/2022 QE78 ( ATLAS ) Now it is 14.5 mag (Mar. 7, Toru Yusa). It stays 15 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) Mar. 7 9 4.41 30 44.3 4.816 5.626 141 14.4 22:04 ( 0, 86) Mar. 14 9 2.92 31 7.8 4.898 5.638 134 14.5 21:35 ( 0, 86) C/2022 N2 ( PanSTARRS ) Now it is 14.8 mag (Mar. 7, Toru Yusa). It stays 15 mag for a while. It will be unobservable in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 3 46.78 24 54.6 4.438 4.273 74 14.5 19:24 ( 84, 55) Mar. 14 3 53.45 25 5.8 4.562 4.300 68 14.6 19:30 ( 89, 50) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.6 mag (Jan. 20, Chris Wyatt). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 4 45.92 -71 50.9 14.283 14.196 83 14.8 19:24 ( 8,-18) Mar. 14 4 48.22 -71 26.3 14.249 14.174 83 14.8 19:30 ( 10,-19) C/2021 G2 ( ATLAS ) Now it is 14.7 mag (Feb. 16, Kunihiro Shima). 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) Mar. 7 17 26.34 5 45.8 6.435 6.446 86 14.8 4:58 (319, 54) Mar. 14 17 28.23 6 34.4 6.369 6.478 91 14.8 4:48 (324, 57) C/2023 R1 ( PanSTARRS ) Now it is 14.6 mag (Mar. 6, ATLAS-MLO, Mauna Loa). It stays 14 mag for a while. It will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 19 35.10 -3 28.7 4.091 3.586 53 14.9 4:58 (295, 26) Mar. 14 19 34.54 -3 30.0 3.975 3.581 59 14.9 4:48 (298, 29) C/2025 T1 ( ATLAS ) It brightened up to 9.0 mag from late November to early December (Nov. 22, Thomas Lehmann). Fading rapidly. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 21 59.12 -19 31.9 2.717 1.835 21 15.1 4:58 (286,-12) Mar. 14 22 5.82 -21 0.8 2.731 1.914 28 15.5 4:48 (288,-10) C/2025 Q3 ( ATLAS ) It became brighter than expected. Now it is 15.2 mag (Feb. 12, Ken-ichi Kadota). Fading gradually. In the Northern Hemisphere, it will be unobservable soon. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 32.46 -20 48.3 2.583 2.115 51 15.2 19:24 ( 54, 12) Mar. 14 2 40.15 -21 41.5 2.639 2.121 48 15.3 19:30 ( 57, 7) 40P/Vaisala 1 It became brighter than expected, brightened up to 14.3 mag (Jan. 21, Michael Jager). Now it is 16.2 mag (Feb. 19, ATLAS-HKO, Haleakala). Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 17 26.70 -11 6.0 2.002 2.148 84 15.5 4:58 (331, 39) Mar. 14 17 35.79 -10 53.6 1.959 2.184 89 15.5 4:48 (333, 40) 218P/LINEAR Now it is 16.2 mag (Feb. 24, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag in June. It stays extremely 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) Mar. 7 19 14.65 -20 7.2 1.265 1.130 58 15.8 4:58 (311, 17) Mar. 14 19 44.10 -18 56.7 1.275 1.136 58 15.8 4:48 (308, 17) 93P/Lovas 1 Now it is 16.0 mag (Jan. 18, Kunihiro Shima). It stays 16 mag for a while. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 0 26.53 9 2.6 2.645 1.787 24 16.0 19:24 ( 97, 6) Mar. 14 0 43.38 11 8.2 2.647 1.765 22 15.9 19:30 (101, 4) 3I/2025 N1 ( ATLAS ) Third interstellar object in history following 1I/'Oumuamua and 2I/Borisov. The eccentricity is extremely big as 6. It approached to Sun down to 1.38 a.u. in late October. It brightened up to 8.9 mag in November (Nov. 12, Toshiyuki Takahashi). Now it is 15.4 mag (Feb. 20, Mitsunori Tsumura). Fading rapidly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 6 56.27 20 11.0 4.247 4.782 117 15.9 19:56 ( 0, 75) Mar. 14 6 51.83 20 17.5 4.602 5.016 109 16.3 19:30 ( 5, 75) C/2024 R4 ( PanSTARRS ) It brightened rapidly. It is expected to brighten up to 13.5 mag from 2027 to 2028. Now it is 16.5 mag (Jan. 4, 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 April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 21 57.86 25 24.3 7.243 6.460 35 16.1 4:58 (248, 14) Mar. 14 22 0.67 26 12.9 7.190 6.422 36 16.1 4:48 (250, 17) C/2022 R6 ( PanSTARRS ) Now it is 16.1 mag (Mar. 7, ATLAS-MLO, Mauna Loa). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and 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) Mar. 7 8 32.33 -4 57.0 5.905 6.692 139 16.1 21:32 ( 0, 50) Mar. 14 8 31.05 -4 3.6 5.976 6.701 133 16.1 21:03 ( 0, 51) 10P/Tempel 2 It is expected to brighten up to 8 mag in summer. Now it is 17.4 mag (Mar. 1, Francois Kugel). Brightening rapidly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 17 24.56 -11 5.1 1.861 2.033 85 16.7 4:58 (331, 39) Mar. 14 17 38.25 -10 59.6 1.748 1.989 88 16.3 4:48 (332, 40) C/2025 J1 ( Borisov ) Now it is 16.6 mag (Mar. 1, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in June. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 4 51.32 57 22.3 3.511 3.686 92 16.4 19:24 (153, 63) Mar. 14 4 53.90 54 54.9 3.596 3.672 86 16.4 19:30 (143, 61) 145P/Shoemaker-Levy 5 Now it is 16.1 mag (Mar. 7, Catalina Sky Survey). Fading slowly. It will be fainter than 18 mag in June. It will be unobservable soon in the Southern Hemisphere, or in May in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 1 50.20 15 26.4 2.482 1.916 45 16.5 19:24 ( 91, 27) Mar. 14 2 6.49 17 15.7 2.539 1.927 42 16.6 19:30 ( 95, 24) C/2024 G6 ( ATLAS ) Now it is 16.9 mag (Mar. 2, ATLAS Chile). 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) Mar. 7 16 35.89 0 3.1 6.214 6.430 98 16.6 4:58 (343, 54) Mar. 14 16 34.38 1 5.2 6.101 6.431 105 16.6 4:48 (351, 56) C/2025 L1 ( ATLAS ) It was expected to brighten up to 13.5 mag. But actually, it is getting diffuse and fading very rapidly. Now it is 17.4 mag (Feb. 19, Andrew Pearce). It will fade out rapidly after this. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 15 42.88 -0 23.6 1.208 1.820 111 16.6 4:46 ( 0, 54) Mar. 14 15 30.42 8 9.5 1.138 1.857 121 16.7 4:06 ( 0, 63) 123P/West-Hartley It will brighten up to 15 mag from autumn to winter. Now it is 17.4 mag (Feb. 13, Ken-ichi Kadota). Brightening slowly. It will be unobservable in May 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) Mar. 7 3 51.43 29 45.4 2.675 2.622 76 16.7 19:24 ( 92, 58) Mar. 14 4 0.54 30 13.1 2.735 2.594 71 16.6 19:30 ( 95, 53) 195P/Hill Now it is 17.0 mag (Feb. 25, ATLAS South Africa). It stays 17 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) Mar. 7 9 26.55 -33 3.1 3.794 4.544 134 16.7 22:26 ( 0, 22) Mar. 14 9 23.64 -32 25.3 3.813 4.551 133 16.7 21:55 ( 0, 23) 63P/Wild 1 Now it is 17.0 mag (Mar. 4, ATLAS-MLO, Mauna Loa). Brightening gradually. 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) Mar. 7 6 12.80 45 5.4 1.827 2.296 105 16.9 19:24 (170, 80) Mar. 14 6 19.92 43 43.8 1.866 2.263 100 16.7 19:30 (144, 79) 493P/2024 Q2 ( LONEOS ) Now it is 16.3 mag (Mar. 3, Alfons Diepvens). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 4 45.57 47 35.1 3.702 3.836 90 16.7 19:24 (132, 68) Mar. 14 4 52.89 47 5.3 3.796 3.839 84 16.8 19:30 (127, 64) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (Feb. 3, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and 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) Mar. 7 9 37.51 -18 44.8 5.123 5.979 146 16.8 22:37 ( 0, 36) Mar. 14 9 30.72 -17 33.2 5.177 6.004 143 16.9 22:02 ( 0, 37) C/2024 A1 ( ATLAS ) Now it is 16.8 mag (Feb. 27, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in June. 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) Mar. 7 6 24.00 63 55.6 4.176 4.506 103 16.9 19:25 (180, 61) Mar. 14 6 18.70 63 52.5 4.301 4.537 97 17.0 19:30 (172, 61) 43P/Wolf-Harrington Now it is 17.4 mag (Mar. 7, Toru Yusa). Fading gradually. It will be fainter than 18 mag in May. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 10 53.64 -7 55.4 1.896 2.869 166 16.9 23:53 ( 0, 47) Mar. 14 10 49.16 -7 16.3 1.922 2.893 164 17.0 23:21 ( 0, 48) 164P/Christensen Now it is 16.9 mag (Feb. 21, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in April. 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) Mar. 7 10 50.82 31 40.1 2.023 2.944 153 17.0 23:50 ( 0, 87) Mar. 14 10 44.71 31 57.5 2.090 2.983 148 17.1 23:16 ( 0, 87) C/2023 X2 ( Lemmon ) Now it is 17.4 mag (Jan. 15, Ken-ichi Kadota). It stays 17 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) Mar. 7 21 20.78 81 49.7 5.049 5.115 88 17.0 4:58 (190, 36) Mar. 14 21 29.39 82 16.8 5.091 5.121 86 17.0 4:48 (189, 36) C/2023 RS61 ( PanSTARRS ) It is around 20 mag usually. However, it brightened in outburst in 2025 autumn up to 17.0 mag (Sept. 4, Taras Prystavski). Now it is 17.3 mag (Mar. 6, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May. But it will be observable again in June. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 53.87 35 38.0 9.034 8.692 66 17.1 19:24 (107, 48) Mar. 14 2 57.03 35 39.3 9.123 8.683 60 17.1 19:30 (109, 42) (248590) 2006 CS It seems to be a parent of the beta-Tucanids meteor shower. Fading gradually. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 52.88 -41 43.2 0.310 0.887 61 17.2 19:24 ( 37, 0) Mar. 14 2 55.81 -22 24.0 0.206 0.884 52 17.2 19:30 ( 56, 10) C/2023 H5 ( Lemmon ) Now it is 16.7 mag (Feb. 12, Ken-ichi Kadota). 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) Mar. 7 20 58.90 61 21.2 4.998 4.775 71 17.2 4:58 (215, 37) Mar. 14 21 10.75 61 29.7 5.049 4.799 69 17.2 4:48 (215, 38) C/2025 R2 ( SWAN ) It brightened up to 5.2 mag in October (Oct. 11, Virgilio Gonano). Now it is 18.5 mag (Feb. 26, W. Hasubick). Fading gradually. It will be fainter than 18 mag soon. It locates somewhat low in the Northern Hemisphere. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 2 25.83 18 28.2 3.477 3.006 54 17.3 19:24 ( 89, 35) Mar. 14 2 34.58 19 5.5 3.648 3.094 49 17.5 19:30 ( 93, 31) 210P/Christensen It brightened up to 9.5 mag in late November (Nov. 28, Michael Jager, Gerald Rhemann, E. Prosperi). Now it is 17.2 mag (Feb. 19, Toru Yusa). 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) Mar. 7 15 47.01 -5 11.8 1.228 1.820 109 17.3 4:50 ( 0, 50) Mar. 14 15 41.20 -4 18.6 1.223 1.904 117 17.6 4:17 ( 0, 51) C/2024 G2 ( ATLAS ) Now it is 17.7 mag (Feb. 21, Ken-ichi Kadota). It stays 18 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 11 34.43 -0 4.3 4.714 5.697 171 17.4 0:38 ( 0, 55) Mar. 14 11 28.51 1 20.0 4.721 5.715 177 17.4 0:05 ( 0, 56) A/2025 Y1 Cometary activity was detected by Taras Prystavski on Jan. 30, and by Alan Hale on Feb. 12, respectively. Now it is 17.7 mag (Mar. 2, ATLAS Chile). 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) Mar. 7 13 9.74 0 25.1 5.277 6.152 149 17.5 2:13 ( 0, 55) Mar. 14 13 7.58 0 51.2 5.174 6.100 156 17.4 1:43 ( 0, 56) C/2024 G4 ( PanSTARRS ) Now it is 17.5 mag (Feb. 18, Kunihiro Shima). It stays 17 mag for a while. It will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 19 40.17 1 8.4 5.442 4.902 52 17.6 4:58 (290, 28) Mar. 14 19 46.19 1 26.3 5.367 4.901 57 17.6 4:48 (292, 30) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. It stays 18 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) Mar. 7 20 13.09 -65 40.9 9.856 9.520 67 17.8 4:58 (336,-22) Mar. 14 20 15.95 -66 1.1 9.827 9.569 72 17.8 4:48 (338,-21) 124P/Mrkos Now it is 17.6 mag (Feb. 25, Alfons Diepvens). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable soon. But it will be observable again in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 8 9.78 56 11.3 1.312 1.985 118 17.9 21:10 (180, 69) Mar. 14 8 7.27 53 19.0 1.328 1.957 114 17.9 20:40 (180, 72) 407P/PanSTARRS-Fuls It has not been observed yet in this apparition. 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) Mar. 7 7 4.98 27 22.8 1.758 2.393 118 17.9 20:06 ( 0, 82) Mar. 14 7 7.89 27 16.6 1.816 2.374 111 17.9 19:41 ( 0, 82) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 17.6 mag (Mar. 4, Alfons Diepvens). 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) Mar. 7 5 28.62 31 15.1 10.558 10.726 97 17.9 19:24 ( 76, 78) Mar. 14 5 28.49 31 16.4 10.725 10.773 90 18.0 19:30 ( 85, 71) P/2023 S1 ( PanSTARRS ) It brightened up to 13.7 mag in last winter (Jan. 4, 2025, W. Pei). It faded out rapidly after the perihelion passage. Now it is 20.1 mag (Feb. 18, Kunihiro Shima). 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) Mar. 7 15 32.59 -29 56.8 2.905 3.342 107 19.8 4:35 ( 0, 25) Mar. 14 15 33.64 -30 22.6 2.831 3.363 114 19.8 4:09 ( 0, 25) 489P/Denning It had been lost for 113 years. It must have passed the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. Fading gradually. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Mar. 7 13 23.51 -6 18.4 0.958 1.856 144 21.2 2:27 ( 0, 49) Mar. 14 13 19.70 -6 19.8 0.959 1.896 152 21.1 1:55 ( 0, 49)