Weekly Information about Bright Comets (2025 May 3: North)

Japanese version Home page	Updated on May 3, 2025
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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/2025 F2 ( SWAN ) Bright new comet discovered in the SWAN images. It brightened rapidly up to 7.8 mag on Apr. 8 (Osamu Miyazaki). Then it has been fading before the perihelion passage. Now it is 9.2 mag (Apr. 24, Virgilio Gonano). Fading rapidly. It will be fainter than 18 mag in August. Now it is not observable. It will appear soon in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 3 53.64 24 53.5 0.965 0.338 19 10.8 20:21 (119, 1) May 10 4 41.78 11 0.1 1.030 0.421 23 11.7 20:29 (107, -6) 21P/Giacobini-Zinner It is visible at 11 mag in the SWAN images (Jan. 27, Vladimir Bezugly). It will fade out rapidly after this. Now it is not observable. It will appear in July in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 3 4.83 6 48.8 2.124 1.149 10 11.9 20:21 (114,-20) May 10 3 31.82 6 51.4 2.165 1.197 12 12.3 20:29 (116,-21) C/2023 A3 ( Tsuchinshan-ATLAS ) It brightened up to -3 mag due to the forward scattering on Oct. 9 in the SOHO coronagraph images (Q.-c. Zhang, Charles S. Morris). It became a great comet of 0 mag on the ground. Now it is 12.6 mag (Apr. 26, Hiroshi Abe). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. But it will become high in spring. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 20 12.94 24 15.0 3.489 3.626 89 12.9 3:33 (285, 63) May 10 20 7.19 25 22.0 3.476 3.710 95 13.0 3:24 (289, 68) C/2024 G3 ( ATLAS ) It approached to Sun down to 0.09 a.u. on Jan. 13. It brightened up to -2 or -3 mag and it was detected even in the daylight. The nucleus was disintegrated on Jan. 19. However, its remnant is still visible. Fading gradually. 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) May 3 1 50.14 -47 54.6 2.687 2.429 64 13.0 3:33 (306,-40) May 10 2 2.30 -49 13.8 2.728 2.535 68 13.2 3:24 (308,-39) 217P/LINEAR It brightens up to 13 mag in early summer. But the condition in this apparition is bad. Now it is 14.0 mag (Apr. 14, B. Lutkenhoner). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in July. It stays extremely 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) May 3 1 0.68 0 15.9 2.042 1.258 28 13.5 3:33 (263, -9) May 10 1 26.54 2 20.1 2.024 1.241 29 13.4 3:24 (261, -9) 29P/Schwassmann-Wachmann 1 Now it is 12.4 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 9 36.49 10 46.4 6.015 6.275 100 13.9 20:21 ( 45, 58) May 10 9 37.55 10 40.6 6.126 6.276 93 13.9 20:29 ( 57, 53) C/2021 G2 ( ATLAS ) Now it is 13.5 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). 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) May 3 15 23.16 -7 32.0 4.314 5.300 166 13.9 0:41 ( 0, 47) May 10 15 20.24 -6 35.8 4.325 5.319 168 13.9 0:11 ( 0, 48) C/2022 N2 ( PanSTARRS ) Now it is 14.9 mag (Feb. 4, Alfons Diepvens). It stays 14 mag for a while. In the Northern Hemisphere, it is not observable now, but it will be observable soon. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 1 20.74 12 36.1 4.842 3.906 19 14.3 3:33 (250, -6) May 10 1 29.60 13 32.7 4.796 3.894 23 14.3 3:24 (251, -3) 49P/Arend-Rigaux Now it is 14.5 mag (Apr. 21, Hiroshi Abe). It will fade out rapidly after this. It will be fainter than 18 mag in September. It will be unobservable in July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 5 26.21 20 42.9 2.078 1.453 39 14.4 20:21 (105, 16) May 10 5 50.11 22 2.7 2.117 1.468 38 14.5 20:29 (107, 14) 48P/Johnson Fading slowly. 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 3 0 40.73 -4 11.6 2.799 2.064 35 14.4 3:33 (270, -7) May 10 0 55.46 -2 58.9 2.772 2.078 38 14.4 3:24 (269, -6) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 14.5 mag (Apr. 30, Alfons Diepvens). It stays 15 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 1 45.97 48 26.9 4.989 4.200 34 14.5 3:33 (219, 13) May 10 1 48.21 48 47.5 5.016 4.230 35 14.6 3:24 (220, 15) C/2022 QE78 ( ATLAS ) Now it is 14.8 mag (Apr. 24, Andrew Pearce). It stays 15 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 3 6 41.26 15 39.1 6.031 5.561 57 14.9 20:21 ( 90, 28) May 10 6 46.29 16 3.9 6.112 5.552 52 14.9 20:29 ( 95, 22) C/2024 J2 ( Wierzchos ) Brightened rapidly. Now it is 14.6 mag (Jan. 31, Thomas Lehmann). Fading slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. 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 3 0 57.70 15 10.9 2.764 1.895 24 15.2 3:33 (252, 1) May 10 1 10.78 14 1.5 2.753 1.923 28 15.2 3:24 (253, 1) C/2024 L5 ( ATLAS ) Now it is 14.9 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). Fading gradually. 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 11 57.62 -16 9.2 2.628 3.470 140 15.2 21:11 ( 0, 39) May 10 11 44.68 -13 53.1 2.730 3.480 131 15.3 20:31 ( 0, 41) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.4 mag (Apr. 30, Andrew Pearce). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. 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 3 4 9.30 -65 30.3 15.275 15.182 82 15.2 20:21 ( 30,-37) May 10 4 14.37 -65 25.4 15.232 15.159 83 15.2 20:29 ( 31,-41) C/2023 C2 ( ATLAS ) It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 14.9 mag (Apr. 7, Masayoshi Yoshimi). It stays 16 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 23 1.58 26 34.3 3.508 2.991 51 15.3 3:33 (256, 29) May 10 23 8.62 28 55.8 3.493 3.036 55 15.3 3:24 (255, 33) 43P/Wolf-Harrington Now it is 16.5 mag (Apr. 7, Alfons Diepvens). It stays 15 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in August in the Southern Hemisphere. But it will be observable again in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 4 30.66 19 58.4 3.395 2.535 26 15.4 20:21 (111, 5) May 10 4 44.41 20 13.1 3.419 2.522 23 15.4 20:29 (115, 1) 65P/Gunn Now it is 16.4 mag (Apr. 29, ATLAS Chile). It stays 15 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 3 18 58.86 -27 29.5 2.306 2.934 119 15.5 3:33 (349, 27) May 10 19 0.47 -27 55.2 2.225 2.932 125 15.4 3:24 (353, 27) P/2023 S1 ( PanSTARRS ) It brightened up to 14.4 mag in winter (Feb. 4, Ken-ichi Kadota). Now it is 15.4 mag (Apr. 21, Hiroshi Abe). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in July. 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 3 8 58.09 13 56.8 2.443 2.651 90 15.4 20:21 ( 62, 54) May 10 9 5.30 13 14.4 2.537 2.658 85 15.5 20:29 ( 68, 49) C/2023 T3 ( Fuls ) Now it is 15.4 mag (Apr. 26, Toshihiko Ikemura, Hirohisa Sato). 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) May 3 13 7.58 -30 51.6 2.725 3.658 153 15.5 22:22 ( 0, 24) May 10 13 6.63 -29 44.1 2.765 3.673 149 15.6 21:53 ( 0, 25) C/2023 R1 ( PanSTARRS ) It is expected to brighten up to 13 mag in early summer in 2026. Now it is 16.0 mag (Apr. 26, Hiroshi Abe). Brightening slowly. 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 22 35.82 21 6.3 5.163 4.705 57 15.8 3:33 (265, 32) May 10 22 35.05 21 41.1 5.025 4.667 63 15.7 3:24 (267, 36) 496P/2024 S3 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 15.7 mag (Apr. 14, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 7 13.67 35 15.6 1.929 1.734 63 15.7 20:21 (108, 43) May 10 7 37.11 34 30.2 1.999 1.764 61 15.9 20:29 (108, 41) C/2024 J3 ( ATLAS ) It will brighten up to 13 mag in 2026. Now it is 16.3 mag (Apr. 29, ATLAS Chile). 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) May 3 19 47.47 -21 56.6 5.748 6.130 107 15.9 3:33 (335, 29) May 10 19 46.14 -21 27.9 5.597 6.088 114 15.8 3:24 (340, 31) C/2024 E1 ( Wierzchos ) It is expected to brighten up to 5 mag in 2026 January. Now it is 16.2 mag (Apr. 16, Ken-ichi Kadota). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in July. But it will be observable again in July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 18 20.23 54 30.2 3.795 4.025 95 15.9 3:33 (182, 71) May 10 18 14.53 55 34.8 3.695 3.946 96 15.8 3:04 (180, 69) C/2023 F3 ( ATLAS ) Now it is 16.0 mag (Apr. 30, Andrew Pearce). It stays 16 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 3 11 0.04 -37 20.0 4.566 5.235 127 16.0 20:21 ( 1, 18) May 10 10 53.42 -35 39.2 4.643 5.242 121 16.0 20:29 ( 11, 18) C/2023 H5 ( Lemmon ) Now it is 15.8 mag (Apr. 4, Ken-ichi Kadota). It stays 16 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 3 10 43.97 65 51.2 4.264 4.340 87 16.0 20:21 (176, 59) May 10 10 39.54 65 50.1 4.339 4.333 82 16.1 20:29 (168, 58) C/2024 A1 ( ATLAS ) Now it is 16.2 mag (Apr. 11, ATLAS South Africa). It stays 16 mag for a while. It will be unobservable in June. But it will be observable again in August in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 40.48 10 16.1 4.321 3.892 58 16.3 20:21 ( 85, 25) May 10 6 44.32 11 36.2 4.415 3.887 52 16.4 20:29 ( 91, 19) C/2022 R6 ( PanSTARRS ) Now it is 16.1 mag (Apr. 29, ATLAS Chile). It stays 16 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 July. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 57.96 -15 21.5 6.874 6.611 70 16.4 20:21 ( 61, 13) May 10 7 1.98 -14 35.7 6.948 6.606 66 16.4 20:29 ( 66, 7) C/2019 U5 ( PanSTARRS ) Now it is 16.5 mag (Apr. 6, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in September. In the Southern Hemisphere, it will be getting lower gradually. But it will be getting higher again after June. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 5 27.44 -38 0.1 7.653 7.308 66 16.7 20:21 ( 55,-17) May 10 5 29.48 -37 29.9 7.732 7.353 64 16.7 20:29 ( 59,-23) 47P/Ashbrook-Jackson Now it is 17.2 mag (Apr. 7, E. Cortes, B. Lutkenhoner). 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) May 3 22 32.85 -18 6.1 3.183 2.985 69 16.8 3:33 (300, 9) May 10 22 41.02 -17 18.0 3.084 2.972 74 16.7 3:24 (301, 12) C/2023 Q1 ( PanSTARRS ) It brightened up to 13.8 mag in winter (Dec. 30, Thomas Lehmann). Now it is 16.4 mag (Apr. 4, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be getting lower gradually. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 8 52.55 45 49.5 3.031 3.042 81 16.7 20:21 (123, 63) May 10 9 1.75 43 47.7 3.146 3.080 77 16.9 20:29 (118, 58) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 16.3 mag (Apr. 23, ATLAS Chile). 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 3 22 19.91 -64 51.4 7.162 7.303 94 16.9 3:33 (336,-20) May 10 22 19.93 -65 43.7 7.134 7.356 98 16.9 3:24 (339,-20) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.9 mag (Dec. 20, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 1 19.06 -53 19.5 10.984 10.700 71 17.0 3:33 (314,-36) May 10 1 21.52 -53 14.0 10.938 10.710 74 17.0 3:24 (315,-34) 13P/Olbers It returned for the first time in 68 years. It brightened up to 6.2 mag in early last summer (July 1, Virgilio Gonano). Now it is 16.3 mag (Apr. 29, ATLAS Chile). 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 3 18 41.69 -24 40.2 3.334 3.974 122 17.0 3:33 (353, 30) May 10 18 37.94 -25 19.4 3.309 4.040 130 17.2 3:24 (359, 30) C/2021 S3 ( PanSTARRS ) It brightened up to 9.6 mag from February to March in 2024 (Feb. 25, 2024, Thomas Lehmann). Now it is 17.2 mag (Apr. 8, Masayoshi Yoshimi). It stays 17 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) May 3 23 24.34 37 28.8 6.002 5.384 48 17.0 3:33 (243, 30) May 10 23 28.63 38 10.8 6.016 5.448 51 17.1 3:24 (243, 33) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 18.9 mag (Apr. 14, Jean-Claude Merlin). 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 3 11 55.74 -58 44.7 9.486 10.129 127 17.0 21:10 ( 0, -4) May 10 11 53.64 -58 17.2 9.545 10.172 126 17.1 20:40 ( 0, -3) 88P/Howell It will brighten up to 9 mag in 2026 spring. Now it is 17.3 mag (Apr. 30, Andrew Pearce). Brightening slowly. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in August. 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 3 10 17.10 15 46.8 2.640 3.102 107 17.1 20:21 ( 33, 68) May 10 10 17.62 15 31.0 2.700 3.063 101 17.1 20:29 ( 49, 63) C/2024 G2 ( ATLAS ) Now it is 17.1 mag (Apr. 17, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable in July. 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 3 11 14.57 -33 35.6 4.647 5.357 130 17.1 20:29 ( 0, 21) May 10 11 10.77 -31 42.1 4.710 5.354 125 17.2 20:29 ( 7, 23) C/2020 K1 ( PanSTARRS ) It brightened up to 12.1 mag in 2023 spring (May 20, 2023, Jose Guilherme de S. Aguiar). Now it is 17.4 mag (Mar. 25, ATLAS South Africa). It stays 17 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 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 3 5 46.39 -21 11.1 7.547 7.075 58 17.2 20:21 ( 67, -4) May 10 5 49.50 -20 27.9 7.654 7.123 55 17.2 20:29 ( 72,-10) 195P/Hill Now it is 17.6 mag (Apr. 5, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in July in the Southern Hemisphere. But it will be observable again in July in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 47.06 -5 24.2 4.800 4.461 64 17.2 20:21 ( 70, 17) May 10 6 52.72 -5 18.6 4.874 4.458 60 17.3 20:29 ( 75, 11) 362P/(457175) 2008 GO98 Now it is 17.4 mag (Sept. 20, Taras Prystavski). 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 3 21 33.66 0 8.4 3.297 3.225 77 17.3 3:33 (296, 32) May 10 21 39.00 0 53.1 3.220 3.240 82 17.3 3:24 (298, 35) (308607) 2005 WY3 Peculiar asteroid moving along a cometary orbit. Now it is 17.5 mag (Feb. 24, Taras Prystavski). It stays 17 mag for a while. It will be unobservable in June 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) May 3 5 58.85 1 2.9 2.333 1.872 51 17.3 20:21 ( 83, 12) May 10 6 16.41 1 48.7 2.351 1.853 49 17.3 20:29 ( 86, 8) C/2024 X2 ( ATLAS ) Now it is 17.2 mag (Apr. 28, ATLAS Chile). It stays 18 mag for a while. It will be unobservable soon in the Northern Hemisphere, or in July in the Southern Hemisphere. But it will be observable again in August in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 7 31.97 -32 20.7 3.678 3.720 84 17.3 20:21 ( 43, 6) May 10 7 35.55 -29 44.1 3.750 3.711 80 17.4 20:29 ( 50, 3) 12P/Pons-Brooks It returns for the first time in 70 years. It brightened up to 3.7 mag in early April in 2024 (Apr. 6, 2024, Jose Guilherme Aguiar). Now it is 17.9 mag (Mar. 14, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in June. 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 3 16 39.16 -51 28.5 4.083 4.869 136 17.3 1:58 ( 0, 3) May 10 16 30.21 -51 9.2 4.093 4.933 142 17.4 1:21 ( 0, 4) C/2024 B1 ( Lemmon ) It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 16.9 mag (Apr. 30, ATLAS Chile). 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 3 17 37.69 11 47.7 2.335 3.063 128 17.4 2:55 ( 0, 67) May 10 17 28.56 11 1.3 2.334 3.130 134 17.5 2:19 ( 0, 66) 472P/2023 RL75 ( NEAT-LINEAR ) It brightened up to 15.2 mag in winter (Dec. 30, ATLAS-MLO, Mauna Loa). Now it is 17.3 mag (Apr. 19, S. Gombos). Fading slowly. It will be fainter than 18 mag in June. It locates somewhat low. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 6 55.36 12 54.7 4.314 3.937 61 17.4 20:21 ( 85, 30) May 10 7 2.63 12 55.3 4.423 3.960 56 17.5 20:29 ( 89, 24) C/2024 T5 ( ATLAS ) Now it is 18.0 mag (Feb. 2, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it will be getting higher gradually. It is expected to brighten up to 13 mag in winter between 2026 and 2027. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 2 11.24 -38 0.6 7.664 7.118 54 17.4 3:33 (292,-42) May 10 2 17.04 -37 43.2 7.582 7.075 56 17.4 3:24 (293,-39) 302P/Lemmon-PanSTARRS Now it is 17.3 mag (Oct. 31, ATLAS Chile). 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 3 23 41.34 -5 30.7 3.870 3.298 49 17.5 3:33 (279, 4) May 10 23 49.65 -4 47.0 3.798 3.301 53 17.5 3:24 (280, 6) P/2010 LH155 It brightened very rapidly. Now it is 17.5 mag (Apr. 23, ATLAS-HKO, Haleakala). Fading gradually. It will be fainter than 18 mag soon. 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 3 10 9.23 2 47.7 1.667 2.231 110 17.6 20:21 ( 25, 55) May 10 10 16.39 2 51.1 1.742 2.236 105 17.7 20:29 ( 36, 52) C/2024 G6 ( ATLAS ) Now it is 17.5 mag (Apr. 26, ATLAS South Africa). 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 3 16 59.61 -23 38.3 5.868 6.730 146 17.6 2:17 ( 0, 31) May 10 16 54.14 -22 57.7 5.792 6.716 154 17.6 1:44 ( 0, 32) C/2023 V1 ( Lemmon ) Now it is 17.5 mag (Apr. 28, Yasukazu Ikari). It stays 18 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 appear in August. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 18 57.13 60 35.7 5.050 5.121 88 17.7 3:33 (191, 64) May 10 18 44.07 61 40.3 5.016 5.116 89 17.7 3:24 (182, 63) C/2024 G4 ( PanSTARRS ) Now it is 18.3 mag (Apr. 26, 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) May 3 17 5.26 16 12.7 4.765 5.492 132 17.8 2:22 ( 0, 71) May 10 17 3.68 16 37.8 4.704 5.469 135 17.7 1:53 ( 0, 72) C/2024 N4 ( Sarneczky ) Now it is 17.9 mag (Apr. 7, Ken-ichi Kadota). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. 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 3 7 55.51 56 3.0 5.708 5.462 70 17.8 20:21 (138, 52) May 10 8 1.69 54 50.7 5.797 5.470 66 17.9 20:29 (135, 48) C/2022 U1 ( Leonard ) Now it is 17.6 mag (Apr. 26, 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 3 19 32.53 15 45.3 5.055 5.346 101 17.9 3:33 (313, 64) May 10 19 27.84 15 53.7 4.987 5.380 107 17.9 3:24 (324, 67) (431760) 2008 HE It approached to Sun down to 0.11 a.u. on Mar. 9. Now it is 17.9 mag (Apr. 18, ATLAS Chile). It will fade out rapidly after this. 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 3 9 46.05 5 36.9 0.694 1.357 104 19.5 20:21 ( 36, 55) May 10 10 9.17 4 59.0 0.861 1.469 103 20.0 20:29 ( 40, 53) 105P/Singer Brewster It became much fainter than predicted after the perihelion passage. Now it is 20.0 mag (Mar. 12, Taras Prystavski). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) May 3 20 16.24 -8 24.0 1.807 2.188 97 19.6 3:33 (321, 38) May 10 20 22.65 -7 30.4 1.750 2.206 102 19.6 3:24 (324, 40)