Weekly Information about Bright Comets (2025 Jan. 11: North)

Japanese version Home page	Updated on January 10, 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/2024 G3 ( ATLAS ) It approaches to Sun down to 0.09 a.u. on Jan. 13. Now it is 0.2 mag (Jan. 8, Marco Goiato). It brightens up to -3 mag, but it will turn to fade out rapidly after that. It will appear soon in the evening sky 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) Jan. 11 18 52.75 -19 3.8 1.011 0.159 9 -1.0 6:09 (291, -3) Jan. 18 20 57.19 -23 51.6 1.024 0.243 13 0.9 18:12 ( 62, -3) 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 10.1 mag (Jan. 2, Carlos Labordena). Fading gradually. In the Northern Hemisphere, it will be unobservable soon. But it will be observable again in January. In the Southern Hemisphere, it is not observable now, but it will appear in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 19 50.39 7 13.1 2.930 2.130 29 10.8 18:37 ( 97, 2) Jan. 18 19 56.04 7 55.2 3.049 2.234 28 11.0 5:38 (259, -1) 249P/LINEAR It has not been observed yet in this apparition. It brightens up to 11.5 mag, but it will turn to fade out rapidly after that. It will be fainter than 18 mag in March. Now it is not observable. It will appear in March 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) Jan. 11 17 59.75 -23 25.9 1.503 0.679 20 13.7 5:38 (298, -2) Jan. 18 18 52.27 -21 56.2 1.476 0.592 15 12.7 5:38 (293, -6) 13P/Olbers It returned for the first time in 68 years. It brightened up to 6.2 mag in early summer (July 1, Virgilio Gonano). Fading slowly. It locates somewhat low in the Northern Hemisphere. 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) Jan. 11 17 40.63 -16 32.4 3.715 2.866 26 12.8 5:38 (295, 6) Jan. 18 17 49.58 -17 8.3 3.739 2.938 30 13.0 5:38 (298, 9) 21P/Giacobini-Zinner Brightening gradually. Now it is not observable. It will brighten up to 10 mag in spring. But the condition of this apparition is bad. It is not observable when the comet is bright. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 19 32.05 -2 46.8 2.318 1.425 19 13.5 18:37 ( 92, -7) Jan. 18 19 55.48 -2 25.9 2.263 1.364 18 13.0 5:38 (268, -7) C/2022 E2 ( ATLAS ) Now it is 12.7 mag (Jan. 4, Osamu Miyazaki). Fading slowly. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 1 52.88 60 10.4 3.343 3.818 111 13.0 18:37 (178, 65) Jan. 18 1 41.95 58 8.6 3.459 3.836 105 13.1 18:42 (164, 65) 29P/Schwassmann-Wachmann 1 Major outburst occured between Nov. 1 and 2. Another outburst occured in late November. Now it is 11.5 mag (Jan. 5, Chris Wyatt). It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 10 8.69 8 54.1 5.474 6.255 139 13.7 2:48 ( 0, 64) Jan. 18 10 6.47 8 59.4 5.406 6.257 147 13.6 2:18 ( 0, 64) 333P/LINEAR It approached to Earth down to 0.55 a.u. in early December, and it brightened up to 10.7 mag (Dec. 5, Mike Olason). Now it is 12.7 mag (Dec. 26, Osamu Miyazaki). Fading rapidly. It will be fainter than 18 mag in March. 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) Jan. 11 21 57.52 36 2.5 1.244 1.259 67 13.7 18:37 (110, 41) Jan. 18 22 9.92 32 42.3 1.442 1.305 61 14.4 18:42 (108, 36) C/2023 C2 ( ATLAS ) It brightened up to 12.7 mag in summer (Aug. 7, Thomas Lehmann). Now it is 14.2 mag (Dec. 10, Ken-ichi Kadota). Fading slowly. In the Northern Hemisphere, it will be unobservable in March. But it will be observable again in March. In the Southern Hemisphere, it is not observable now, but it will appear in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 20 26.54 -9 9.8 3.358 2.447 18 14.0 18:37 ( 79, 0) Jan. 18 20 37.97 -7 7.6 3.396 2.468 16 14.1 18:42 ( 84, -3) 12P/Pons-Brooks It returns for the first time in 70 years. It brightened up to 3.7 mag in early April (Apr. 6, Jose Guilherme Aguiar). Now it is 14.6 mag (Oct. 22, Hidetaka Sato). Fading slowly. In the Northern Hemisphere, it is not observable now, but it will appear in February. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 16 43.40 -48 29.6 4.442 3.773 42 14.0 5:38 (326, -7) Jan. 18 16 50.68 -48 40.7 4.451 3.846 46 14.1 5:38 (329, -5) C/2022 QE78 ( ATLAS ) Now it is 14.1 mag (Dec. 23, ATLAS Chile). 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) Jan. 11 6 26.51 5 46.9 4.837 5.760 157 14.1 23:02 ( 0, 61) Jan. 18 6 23.79 6 22.8 4.851 5.744 152 14.1 22:32 ( 0, 61) C/2021 G2 ( ATLAS ) Now it is 13.6 mag (Jan. 5, Chris Wyatt). It stays 14 mag for a while. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 15 8.76 -18 38.8 5.480 5.073 60 14.2 5:38 (325, 28) Jan. 18 15 13.76 -18 22.5 5.389 5.083 66 14.2 5:38 (330, 31) C/2024 J2 ( Wierzchos ) Brightened rapidly. Now it is 14.9 mag (Dec. 29, Ken-ichi Kadota). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in April. In the Southern Hemisphere, it is not observable now, but it will appear in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 19 52.97 31 10.7 2.427 2.002 53 14.4 18:37 (117, 16) Jan. 18 20 17.96 30 14.8 2.430 1.967 51 14.3 18:42 (117, 14) P/2023 S1 Now it is 14.4 mag (Dec. 27, Purple Mountain Observatory, XuYi Station). 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) Jan. 11 9 12.35 19 4.9 1.705 2.633 155 14.6 1:52 ( 0, 74) Jan. 18 9 7.60 19 0.3 1.670 2.629 163 14.5 1:19 ( 0, 74) 37P/Forbes Now it is 13.4 mag (Dec. 19, Ken-ichi Kadota). It will fade out rapidly after this. It will be fainter than 18 mag in May. In the Northern Hemisphere, it will be unobservable in February. 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) Jan. 11 21 24.09 -13 2.6 2.646 1.844 28 14.5 18:37 ( 67, 9) Jan. 18 21 41.45 -11 17.9 2.708 1.876 26 14.7 18:42 ( 71, 7) C/2022 N2 ( PanSTARRS ) It is expected to brighten up to 13 mag in 2025 autumn, and it will be observable in good condition. Now it is 14.7 mag (Dec. 26, Ken-ichi Kadota). It stays 14 mag for a while. It will be unobservable in February in the Southern Hemisphere, or in March in the Northern Hemisphere. But it will be observable again in May in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 23 12.16 -1 39.0 4.654 4.212 57 14.6 18:37 ( 56, 36) Jan. 18 23 18.57 -0 57.5 4.715 4.187 52 14.6 18:42 ( 63, 32) 48P/Johnson Now it is 16.6 mag (Oct. 9, Hidetaka Sato). It stays 15 mag for a while. Now it is not observable. It will appear in March in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 20 14.56 -22 11.1 3.005 2.046 10 15.4 18:37 ( 70, -9) Jan. 18 20 32.31 -21 34.8 3.007 2.036 7 15.2 18:42 ( 72,-12) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.8 mag (Dec. 16, ATLAS Chile). 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) Jan. 11 3 34.88 -70 0.6 15.707 15.555 79 15.4 20:09 ( 0,-15) Jan. 18 3 33.28 -69 43.7 15.700 15.532 78 15.4 19:40 ( 0,-15) C/2024 B1 ( Lemmon ) It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 17 19.51 18 48.5 2.521 2.060 51 15.5 5:38 (268, 31) Jan. 18 17 29.04 17 47.4 2.551 2.115 53 15.7 5:38 (271, 34) 43P/Wolf-Harrington Now it is 15.6 mag (Dec. 16, 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 be unobservable in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 1 50.81 14 1.9 2.498 2.840 100 15.6 18:37 ( 6, 69) Jan. 18 1 55.77 14 5.2 2.570 2.816 94 15.6 18:42 ( 25, 68) C/2024 A1 ( ATLAS ) Now it is 15.8 mag (Jan. 6, A. Pearce, T. Lovejoy). It stays 16 mag for a while. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 7 23.31 -21 29.3 3.329 4.100 136 15.7 0:03 ( 0, 33) Jan. 18 7 14.88 -19 47.7 3.295 4.081 138 15.7 23:22 ( 0, 35) C/2024 Y1 ( Masek ) Bright new comet. Now it is 14.9 mag (Jan. 2, Martin Masek). It will fade out rapidly after this. It will be fainter than 18 mag in February. In the Northern Hemisphere, it is not observable now, but it will be observable soon. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 1 28.86 -59 8.9 1.014 1.164 71 15.7 18:37 ( 4, -4) Jan. 18 2 19.35 -50 36.9 1.020 1.251 77 16.0 18:42 ( 2, 5) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 15.2 mag (Dec. 30, ATLAS-MLO, Mauna Loa). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 6 16.13 9 22.2 2.681 3.613 158 15.7 22:51 ( 0, 64) Jan. 18 6 12.97 9 30.3 2.732 3.630 152 15.8 22:21 ( 0, 65) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.5 mag (Dec. 24, Katsumi Yoshimoto). 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) Jan. 11 5 38.48 21 35.4 6.815 7.713 154 15.8 22:14 ( 0, 77) Jan. 18 5 34.78 21 49.0 6.928 7.766 146 15.9 21:43 ( 0, 77) 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 15.6 mag (Dec. 13, Thomas Lehmann). Fading slowly. In the Northern Hemisphere, it will be getting lower gradually. But it will be getting higher again after March. In the Southern Hemisphere, it is not observable now, but it will appear in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 21 32.39 31 3.1 4.727 4.329 60 15.8 18:37 (106, 35) Jan. 18 21 40.97 30 57.5 4.855 4.397 57 15.9 18:42 (109, 30) C/2023 H5 ( Lemmon ) Now it is 16.1 mag (Jan. 2, ATLAS-HKO, Haleakala). 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 February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 12 26.48 40 38.4 4.022 4.536 115 15.9 5:05 (180, 85) Jan. 18 12 27.10 42 57.0 3.938 4.518 120 15.8 4:38 (180, 82) 496P/2024 S3 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 16.3 mag (Dec. 25, F. Kugel, J. Nicolas). It stays 16 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) Jan. 11 2 20.89 17 2.5 1.181 1.753 107 16.0 18:57 ( 0, 72) Jan. 18 2 27.78 18 55.1 1.214 1.725 102 15.8 18:42 ( 5, 74) C/2024 M1 ( ATLAS ) Almost stellar. Now it is 15.6 mag (Jan. 1, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag in March. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 2 46.30 42 48.2 1.140 1.827 118 15.8 19:22 (180, 82) Jan. 18 2 33.58 45 15.2 1.274 1.861 110 16.2 18:42 (180, 80) C/2023 T3 ( Fuls ) Now it is 16.1 mag (Jan. 4, Ken-ichi Kadota). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 12 58.01 -32 2.5 3.502 3.551 84 15.9 5:36 ( 0, 23) Jan. 18 13 3.73 -32 53.5 3.412 3.549 89 15.9 5:14 ( 0, 22) C/2022 R6 ( PanSTARRS ) Now it is 16.2 mag (Jan. 7, ATLAS Chile). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 6 51.94 -29 45.4 6.095 6.741 127 16.2 23:27 ( 0, 25) Jan. 18 6 49.21 -29 12.7 6.087 6.730 127 16.2 22:57 ( 0, 26) C/2023 F3 ( ATLAS ) Now it is 16.5 mag (June 6, Giuseppe Pappa). It stays 16 mag for a while. 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) Jan. 11 13 37.02 -45 9.4 5.388 5.194 73 16.3 5:38 (353, 9) Jan. 18 13 32.86 -45 44.3 5.274 5.192 79 16.3 5:38 (359, 9) 30P/Reinmuth 1 Now it is 17.3 mag (Jan. 5, ATLAS-HKO, Haleakala). 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) Jan. 11 14 22.15 -6 8.4 2.260 2.228 75 16.3 5:38 (331, 44) Jan. 18 14 31.66 -6 32.4 2.210 2.261 80 16.3 5:38 (337, 46) C/2023 Q1 ( PanSTARRS ) Now it is 14.7 mag (Jan. 2, Katsumi Yoshimoto). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now, but it will appear in April. It is brighter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 8 20.82 75 34.0 1.912 2.613 125 16.3 1:02 (180, 49) Jan. 18 8 9.50 75 0.4 1.929 2.626 125 16.4 0:23 (180, 50) C/2019 U5 ( PanSTARRS ) Now it is 15.8 mag (Jan. 5, ATLAS Chile). It stays 17 mag for a while. In the Northern Hemisphere, it will be unobservable 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) Jan. 11 6 15.20 -50 56.7 6.264 6.593 105 16.3 22:49 ( 0, 4) Jan. 18 6 5.99 -50 29.1 6.321 6.638 104 16.4 22:13 ( 0, 5) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 15.8 mag (Dec. 7, A. Pearce). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. 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) Jan. 11 21 15.97 -61 2.1 7.128 6.448 43 16.4 18:37 ( 30,-22) Jan. 18 21 20.84 -60 43.8 7.192 6.502 42 16.4 18:42 ( 32,-25) 487P/2024 N5 ( Siding Spring ) First return of a new periodic comet which brightened up to 16 mag in 2012. Now it is 14.8 mag (Dec. 28, D. Buczynski). It will fade out rapidly after this. It will be fainter than 18 mag in February. 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) Jan. 11 2 40.59 56 3.6 1.340 1.998 117 16.4 19:17 (180, 69) Jan. 18 2 43.44 56 33.1 1.429 2.028 113 16.8 18:53 (180, 68) 49P/Arend-Rigaux It will brighten up to 14 mag in spring. Now it is 16.0 mag (Jan. 6, ATLAS Chile). Brightening gradually. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 0 31.86 -16 38.5 1.779 1.728 70 16.8 18:37 ( 26, 35) Jan. 18 0 44.25 -14 27.0 1.797 1.689 67 16.5 18:42 ( 33, 34) C/2023 R1 ( PanSTARRS ) Now it is 16.9 mag (Jan. 5, 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 February. But it will be observable again in March. 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) Jan. 11 22 11.76 17 32.0 5.847 5.359 55 16.6 18:37 ( 87, 37) Jan. 18 22 12.99 17 15.8 5.894 5.316 50 16.6 18:42 ( 91, 30) 65P/Gunn Now it is 16.2 mag (July 30, Thomas Lehmann). Brightening slowly. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 16 47.83 -22 24.4 3.750 3.027 37 16.7 5:38 (308, 11) Jan. 18 16 59.02 -22 53.5 3.679 3.018 41 16.6 5:38 (311, 13) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 17.1 mag (Dec. 30, 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) Jan. 11 12 39.82 -56 57.5 9.583 9.432 78 16.6 5:18 ( 0, -2) Jan. 18 12 39.89 -57 33.2 9.550 9.476 82 16.7 4:51 ( 0, -3) (3200) Phaethon Parent asteroid of Geminids meteor shower. Now it is 16.0 mag (Nov. 30, Katsumi Yoshimoto). It will brighten rapidly after this. It will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 1 39.54 19 53.1 0.986 1.503 99 16.7 18:37 ( 19, 74) Jan. 18 1 34.09 17 38.3 1.019 1.422 90 16.8 18:42 ( 41, 68) C/2024 L5 ( ATLAS ) Now it is 16.7 mag (Jan. 7, E. Cortes). Brightening slowly. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 15 18.09 -30 26.1 3.923 3.476 56 16.9 5:38 (329, 17) Jan. 18 15 16.09 -30 40.2 3.789 3.466 63 16.8 5:38 (335, 19) C/2022 L2 ( ATLAS ) Now it is 16.7 mag (Dec. 20, ATLAS Chile). Fading slowly. It will be fainter than 18 mag in March. 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) Jan. 11 7 52.34 -43 14.3 3.566 4.076 114 16.9 0:32 ( 0, 12) Jan. 18 7 36.13 -42 35.6 3.590 4.125 116 16.9 23:42 ( 0, 12) 105P/Singer Brewster It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 16 42.13 -17 35.9 2.716 2.054 39 16.9 5:38 (305, 16) Jan. 18 16 58.96 -17 44.6 2.665 2.052 42 16.9 5:38 (307, 17) 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 will be getting lower gradually. But it will be getting higher again after April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 0 45.13 -62 7.5 10.924 10.557 65 16.9 18:37 ( 9, -8) Jan. 18 0 45.06 -61 17.7 10.973 10.565 63 16.9 18:42 ( 13, -9) 130P/McNaught-Hughes It brightened up to 14 mag from summer to autumn. Now it is 16.9 mag (Dec. 31, Purple Mountain Observatory, XuYi Station). Fading gradually. It will be fainter than 18 mag in February. 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) Jan. 11 1 59.86 9 51.7 2.426 2.781 100 16.9 18:37 ( 0, 65) Jan. 18 2 4.82 10 34.1 2.554 2.815 94 17.1 18:42 ( 17, 65) 305P/Skiff Now it is 16.6 mag (Jan. 4, ATLAS Chile). It will fade out rapidly after this. It will be fainter than 18 mag in February. 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) Jan. 11 1 45.50 8 56.0 1.098 1.561 97 17.0 18:37 ( 8, 64) Jan. 18 2 6.05 9 39.7 1.176 1.597 94 17.1 18:42 ( 15, 64) 276P/Vorobjov Now it is 17.1 mag (Dec. 26, A. Pearce). It stays 17 mag for a while. It will be getting lower gradually after this, and it will be unobservable in May. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 2 41.22 8 39.7 3.457 3.901 109 17.0 19:17 ( 0, 64) Jan. 18 2 43.15 8 44.4 3.558 3.903 103 17.1 18:52 ( 0, 64) 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 16.6 mag (Dec. 21, ATLAS Chile). It stays 18 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 5 54.99 -38 38.7 5.814 6.301 115 17.0 22:30 ( 0, 16) Jan. 18 5 49.85 -37 40.6 5.882 6.350 114 17.1 21:57 ( 0, 17) 32P/Comas Sola It brightened up to 13.5 mag in last winter (Dec. 5, 2023, Chris Wyatt). Now it is 17.8 mag (Dec. 28, ATLAS-HKO, Haleakala). 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) Jan. 11 14 12.47 -6 37.0 3.050 2.996 77 17.1 5:38 (334, 45) Jan. 18 14 17.92 -7 3.7 2.988 3.034 83 17.1 5:38 (342, 46) 242P/Spahr Now it is 17.2 mag (Jan. 3, ATLAS-MLO, Mauna Loa). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in May. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 3 45.94 -15 38.4 3.474 3.973 113 17.2 20:22 ( 0, 39) Jan. 18 3 45.88 -15 1.4 3.554 3.973 108 17.3 19:54 ( 0, 40) P/2015 CD60 ( LINEAR ) Now it is 16.8 mag (Dec. 28, Roberto Haver). It will fade out rapidly after this. It will be fainter than 18 mag in February. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 7 7.22 17 51.8 0.996 1.976 173 17.3 23:42 ( 0, 73) Jan. 18 7 2.50 16 33.7 1.015 1.984 165 17.3 23:10 ( 0, 71) 154P/Brewington It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 17.8 mag (Jan. 1, D29 Purple Mountain Observatory, XuYi Station). Fading gradually. It will be fainter than 18 mag in February. 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) Jan. 11 9 23.57 33 15.6 1.766 2.677 152 17.4 2:03 ( 0, 88) Jan. 18 9 15.14 33 23.1 1.786 2.727 158 17.5 1:27 ( 0, 88) (308607) 2005 WY3 Peculiar asteroid moving along a cometary orbit. Now it is 18.5 mag (Sept. 11, ATLAS-HKO, Haleakala). 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) Jan. 11 3 19.98 -15 10.7 1.958 2.455 108 17.5 19:56 ( 0, 40) Jan. 18 3 21.08 -14 34.4 1.987 2.409 103 17.5 19:30 ( 0, 41) C/2021 S4 ( Tsuchinshan ) Now it is 17.3 mag (Jan. 8, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 7 27.00 41 57.3 6.184 7.115 159 17.5 0:07 (180, 83) Jan. 18 7 23.99 41 57.2 6.212 7.131 157 17.5 23:32 (180, 83) 492P/2024 O3 ( LINEAR ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 17.2 mag (Dec. 27, Michael Jager). It will fade out rapidly after this. It will be fainter than 18 mag in February. 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) Jan. 11 9 35.29 31 37.0 1.612 2.514 150 17.5 2:15 ( 0, 86) Jan. 18 9 28.95 31 59.4 1.626 2.560 157 17.6 1:41 ( 0, 87) C/2024 G2 ( ATLAS ) Now it is 17.4 mag (Jan. 4, B. Lutkenhoner, E. Cortes). It stays 17 mag for a while. It stays extremely low in the Northern Hemisphere. But it will become high in autumn. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 12 58.84 -48 28.5 5.575 5.467 78 17.6 5:37 ( 0, 6) Jan. 18 12 56.28 -48 35.2 5.462 5.457 84 17.6 5:07 ( 0, 6) 195P/Hill Now it is 16.7 mag (Dec. 28, Toshiyuki Takahashi). 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) Jan. 11 6 36.15 -8 39.8 3.683 4.538 146 17.6 23:11 ( 0, 46) Jan. 18 6 32.16 -8 50.2 3.702 4.532 143 17.6 22:40 ( 0, 46) (468861) 2013 LU28 Now it is 18.0 mag (Aug. 18, Taras Prystavski). 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) Jan. 11 7 12.85 37 15.5 7.870 8.821 164 17.7 23:48 (180, 88) Jan. 18 7 7.06 37 1.7 7.895 8.826 160 17.8 23:15 (180, 88) C/2024 E1 ( Wierzchos ) It is expected to brighten up to 5 mag in 2026 January. Now it is 17.6 mag (Jan. 4, ATLAS-HKO, Haleakala). 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 March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 11 17 29.76 40 41.8 5.494 5.213 68 17.9 5:38 (242, 38) Jan. 18 17 36.62 40 55.0 5.397 5.143 69 17.8 5:38 (243, 42) C/2019 T4 ( ATLAS ) It brightened up to 11 mag in 2022 spring. Now it is 18.0 mag (Nov. 12, D. Buczynski). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher 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) Jan. 11 18 21.24 24 31.1 9.015 8.406 49 17.9 5:38 (254, 21) Jan. 18 18 25.56 24 48.3 9.034 8.447 50 17.9 5:38 (257, 26) 50P/Arend Now it is 18.2 mag (Jan. 8, A. Diepvens). Fading gradually. It will be fainter than 18 mag soon. 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) Jan. 11 10 3.68 33 13.8 1.939 2.796 144 17.9 2:43 ( 0, 88) Jan. 18 9 57.33 33 32.6 1.933 2.833 150 18.0 2:09 ( 0, 88)