Weekly Information about Bright Comets (2024 Dec. 21: South)

Japanese version Home page	Updated on December 21, 2024
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Best time and the azimuth, altitude (A,h) are at lat. 35 deg in the Southern Hemisphere. Azimuth indicates 0 for south, 90 for west, 180 for north, 270 for east.

C/2024 G3 ( ATLAS ) It approaches to Sun down to 0.09 a.u. on Jan. 13. According to the calculation, it will brighten up to -3 mag. But probably, it will be disintegrated. At the high light, it may be observable after the perihelion passage only in the Southern Hemisphere. Now it is 8.6 mag (Dec. 14, Martin Masek). It brightens up to -3 mag, but it will turn to fade out rapidly after that. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it will be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 16 49.54 -35 59.2 1.680 0.818 19 7.3 2:55 (315, 1) Dec. 28 17 15.87 -32 52.6 1.481 0.631 18 5.9 3:00 (312, 0) 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 9.8 mag (Dec. 19, Osamu Miyazaki). Fading gradually. In the Northern Hemisphere, it will be unobservable in January. 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) Dec. 21 19 30.95 5 31.2 2.490 1.804 36 9.9 21:00 ( 81,-22) Dec. 28 19 37.87 6 1.0 2.651 1.915 33 10.2 21:03 ( 78,-27) 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 11.6 mag (Dec. 18, Osamu Miyazaki). It will fade out rapidly after this. 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) Dec. 21 20 7.02 57 50.0 0.680 1.153 85 11.4 21:00 (140,-35) Dec. 28 21 10.02 47 51.7 0.851 1.182 79 12.2 21:03 (130,-28) 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). Now it is 10.1 mag (Nov. 10, Mike Olason). Fading gradually. Now it is not observable. It will appear in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 17 11.03 -14 20.1 3.590 2.647 14 12.2 2:55 (303,-18) Dec. 28 17 21.33 -15 8.9 3.641 2.720 17 12.4 3:00 (300,-13) C/2022 E2 ( ATLAS ) Now it is 12.6 mag (Dec. 19, 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) Dec. 21 2 56.70 66 13.6 3.076 3.770 128 12.8 21:00 (179,-11) Dec. 28 2 29.11 64 21.9 3.148 3.785 123 12.8 21:03 (173,-10) 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) Dec. 21 16 17.50 -48 3.0 4.354 3.553 31 13.7 2:55 (320, 13) Dec. 28 16 26.77 -48 10.8 4.394 3.627 34 13.8 3:00 (318, 17) 29P/Schwassmann-Wachmann 1 Major outburst occured between Nov. 1 and 2. Another outburst occured in late November. Now it is 11.4 mag (Dec. 8, Seiichi Yoshida). It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 10 12.62 8 53.7 5.738 6.251 117 13.8 2:55 (207, 42) Dec. 28 10 11.80 8 51.1 5.641 6.253 124 13.7 3:00 (196, 45) 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 January. 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) Dec. 21 19 51.17 -15 6.7 3.221 2.399 28 13.8 21:00 ( 68, -5) Dec. 28 20 3.13 -13 9.2 3.270 2.413 24 13.8 21:03 ( 67,-10) 37P/Forbes Now it is 12.9 mag (Dec. 4, Mike Olason). It will fade out rapidly after this. It will be unobservable in January in the Southern Hemisphere, or in February in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 20 28.45 -17 57.9 2.460 1.758 35 14.0 21:00 ( 71, 4) Dec. 28 20 47.61 -16 23.6 2.521 1.785 33 14.2 21:03 ( 71, 1) C/2022 QE78 ( ATLAS ) Now it is 14.2 mag (Dec. 8, 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) Dec. 21 6 35.32 4 17.6 4.881 5.809 158 14.1 0:37 (180, 51) Dec. 28 6 32.39 4 43.9 4.851 5.792 161 14.1 0:07 (180, 50) C/2021 G2 ( ATLAS ) Now it is 14.1 mag (Aug. 29, Chris Wyatt). 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) Dec. 21 14 51.54 -19 9.8 5.717 5.045 43 14.3 2:55 (286, 11) Dec. 28 14 57.61 -19 2.3 5.645 5.054 48 14.3 3:00 (282, 17) 21P/Giacobini-Zinner Now it is 18.2 mag (Oct. 13, F. Kugel, J. Nicolas). Brightening rapidly. Now it is not observable. It will brighten up to 10 mag in 2025 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) Dec. 21 18 28.29 -3 5.9 2.489 1.617 21 14.7 21:00 ( 63,-28) Dec. 28 18 48.47 -3 6.7 2.432 1.552 20 14.3 21:03 ( 61,-30) 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 14.6 mag (Nov. 19, Ken-ichi Kadota). It stays 15 mag for a while. It will be unobservable in February in the Southern Hemisphere, or in March in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 22 55.40 -3 25.4 4.446 4.290 74 14.6 21:00 (104, 25) Dec. 28 23 0.53 -2 53.1 4.519 4.264 68 14.6 21:03 (101, 20) C/2024 M1 ( ATLAS ) Almost stellar. Now it is 13.7 mag (Dec. 5, Toshihiko Ikemura, Hirohisa Sato). It will fade out rapidly after this. 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 in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 3 55.75 29 39.4 0.817 1.749 152 14.6 21:52 (180, 25) Dec. 28 3 27.42 35 22.9 0.905 1.771 139 15.1 21:03 (179, 19) C/2024 J2 ( Wierzchos ) Brightening rapidly. Now it is 14.8 mag (Dec. 12, 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. It will brighten up to 14 mag from winter to spring. But it is not observable at the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 18 37.21 33 34.9 2.479 2.125 57 14.9 21:00 (104,-46) Dec. 28 19 2.32 32 51.1 2.452 2.081 56 14.7 21:03 (103,-46) P/2023 S1 Now it is 15.2 mag (Dec. 14, Ken-ichi Kadota). 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) Dec. 21 9 19.88 19 31.4 1.880 2.649 132 14.8 2:55 (188, 35) Dec. 28 9 18.65 19 19.5 1.811 2.643 140 14.7 2:53 (180, 36) C/2024 B1 ( Lemmon ) It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 14.0 mag (Dec. 1, Thomas Lehmann). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. 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) Dec. 21 16 44.42 23 0.2 2.392 1.908 49 14.9 2:55 (265,-35) Dec. 28 16 57.27 21 24.0 2.441 1.956 49 15.1 3:00 (264,-30) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 15.3 mag (Nov. 10, Thomas Lehmann). 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) Dec. 21 3 42.83 -70 38.2 15.715 15.626 83 15.4 21:40 ( 0, 54) Dec. 28 3 39.71 -70 28.3 15.714 15.602 81 15.4 21:09 ( 0, 55) 487P/2024 N5 ( Siding Spring ) First return of a new periodic comet which brightened up to 16 mag in 2012. Now it is 15.0 mag (Dec. 10, Ken-ichi Kadota). 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 be unobservable soon. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 2 53.80 53 44.9 1.099 1.920 134 15.5 21:00 (179, 1) Dec. 28 2 45.54 54 44.7 1.173 1.944 128 15.8 21:03 (173, 0) C/2021 S3 ( PanSTARRS ) It brightened up to 9.6 mag from February to March (Feb. 25, 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 21 6.14 31 58.8 4.328 4.123 71 15.5 21:00 (118,-17) Dec. 28 21 14.95 31 33.4 4.463 4.192 67 15.6 21:03 (115,-21) 472P/2023 RL75 ( NEAT-LINEAR ) Now it is 15.5 mag (Dec. 1, ATLAS South Africa). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 6 27.72 9 22.8 2.610 3.566 164 15.6 0:30 (180, 46) Dec. 28 6 23.71 9 18.1 2.619 3.581 165 15.6 23:54 (180, 46) 48P/Johnson Now it is 16.6 mag (Oct. 9, Hidetaka Sato). Brightening slowly. 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) Dec. 21 19 21.69 -23 16.6 2.986 2.084 19 15.8 21:00 ( 57, -5) Dec. 28 19 39.19 -23 2.2 2.995 2.070 16 15.6 21:03 ( 55, -7) 43P/Wolf-Harrington Now it is 15.4 mag (Dec. 1, W. Pei). It stays 16 mag for a while. 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) Dec. 21 1 42.20 14 32.0 2.298 2.912 119 15.7 21:00 (156, 37) Dec. 28 1 43.97 14 14.9 2.360 2.888 112 15.7 21:03 (148, 34) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 15.5 mag (Dec. 3, ATLAS-MLO, Mauna Loa). 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) Dec. 21 5 51.30 20 52.0 6.568 7.551 177 15.7 23:49 (180, 34) Dec. 28 5 46.82 21 6.9 6.634 7.605 170 15.7 23:17 (180, 34) 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. It will be unobservable in January. It will approach to Sun down to 0.5 a.u. in February and brighten up to 11.5 mag. However, it is not observable at the high light. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 15 47.13 -22 22.3 1.707 0.984 29 16.5 2:55 (296, 3) Dec. 28 16 26.55 -23 25.3 1.621 0.880 27 15.7 3:00 (297, 2) C/2024 A1 ( ATLAS ) Now it is 16.3 mag (Dec. 3, ATLAS South Africa). 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) Dec. 21 7 47.57 -25 6.1 3.525 4.162 124 15.9 1:49 (180, 80) Dec. 28 7 39.92 -24 8.8 3.446 4.141 129 15.8 1:14 (180, 79) C/2023 H5 ( Lemmon ) Now it is 16.1 mag (Dec. 13, 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 February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 12 19.82 34 32.3 4.340 4.592 98 16.1 2:55 (221, 6) Dec. 28 12 22.73 36 24.9 4.225 4.572 104 16.0 3:00 (215, 8) C/2023 T3 ( Fuls ) Now it is 16.2 mag (Dec. 14, 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) Dec. 21 12 37.45 -29 8.3 3.770 3.563 70 16.1 2:55 (279, 43) Dec. 28 12 44.81 -30 9.3 3.681 3.558 75 16.0 3:00 (278, 48) C/2023 Q1 ( PanSTARRS ) Now it is 16.0 mag (Dec. 8, Katsumi Yoshimoto). Fading slowly. 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 8 44.41 75 12.8 1.903 2.585 123 16.1 2:48 (180,-20) Dec. 28 8 39.79 75 38.1 1.899 2.592 125 16.2 2:16 (180,-21) C/2019 U5 ( PanSTARRS ) Now it is 16.0 mag (Dec. 2, ATLAS South Africa). 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) Dec. 21 6 45.36 -51 16.7 6.143 6.460 104 16.2 0:47 ( 0, 74) Dec. 28 6 35.12 -51 21.2 6.175 6.504 105 16.2 0:09 ( 0, 74) 30P/Reinmuth 1 Now it is 16.5 mag (Nov. 2, Martin Masek). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 13 49.03 -4 16.7 2.396 2.131 62 16.2 2:55 (264, 16) Dec. 28 14 0.77 -5 0.4 2.353 2.162 66 16.2 3:00 (262, 20) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 16.1 mag (Nov. 22, ATLAS Chile). 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) Dec. 21 21 2.98 -62 18.8 6.875 6.285 49 16.2 21:00 ( 33, 31) Dec. 28 21 6.95 -61 49.8 6.969 6.339 47 16.2 21:03 ( 32, 28) 496P/2024 S3 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 16.8 mag (Nov. 30, Thomas Lehmann). Brightening slowly. 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) Dec. 21 2 12.77 11 53.6 1.100 1.856 125 16.4 21:00 (164, 41) Dec. 28 2 13.35 13 30.3 1.123 1.819 119 16.2 21:03 (156, 38) C/2022 R6 ( PanSTARRS ) Now it is 16.4 mag (Nov. 23, 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) Dec. 21 7 0.40 -30 41.7 6.178 6.774 123 16.3 1:02 (180, 86) Dec. 28 6 57.64 -30 30.1 6.141 6.763 125 16.2 0:32 (180, 86) 130P/McNaught-Hughes It brightened up to 14 mag from summer to autumn. Now it is 16.6 mag (Nov. 30, ATLAS South Africa). Fading gradually. 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 be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 1 50.19 8 1.9 2.059 2.679 119 16.3 21:00 (155, 44) Dec. 28 1 52.44 8 35.0 2.177 2.713 112 16.5 21:03 (147, 40) 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) Dec. 21 13 43.60 -43 20.7 5.702 5.201 55 16.4 2:55 (302, 35) Dec. 28 13 42.28 -43 56.7 5.604 5.198 60 16.4 3:00 (301, 41) (3200) Phaethon Parent asteroid of Geminids meteor shower. Now it is 16.0 mag (Nov. 30, Katsumi Yoshimoto). Brightening gradually. It will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 2 17.09 28 33.3 0.905 1.717 130 16.4 21:00 (169, 26) Dec. 28 2 0.50 25 24.7 0.925 1.650 119 16.6 21:03 (157, 26) C/2019 L3 ( ATLAS ) It brightened up to 8.3 mag in 2021-2022 winter (Jan. 6, 2022, Toshiyuki Takahashi). Now it is 15.1 mag (Aug. 2, Thomas Lehmann). 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) Dec. 21 12 36.25 -55 1.7 9.667 9.300 65 16.6 2:55 (316, 47) Dec. 28 12 37.97 -55 41.3 9.642 9.344 69 16.6 3:00 (318, 51) C/2023 R1 ( PanSTARRS ) Now it is 16.7 mag (Nov. 28, A. Diepvens). It stays 16 mag for a while. It will be unobservable soon in the Southern Hemisphere, or in February in the Northern Hemisphere. But it will be observable again in March in the Northern Hemisphere, or in April in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 22 10.39 18 52.7 5.660 5.487 74 16.7 21:00 (115, 2) Dec. 28 22 10.40 18 20.3 5.728 5.444 68 16.6 21:03 (111, -3) 305P/Skiff Now it is 16.8 mag (Dec. 3, 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. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 0 40.74 7 6.0 0.902 1.475 102 16.7 21:00 (135, 36) Dec. 28 1 2.76 7 37.4 0.961 1.500 100 16.8 21:03 (134, 35) C/2022 L2 ( ATLAS ) Now it is 16.5 mag (Dec. 2, Thomas Lehmann). Fading slowly. It will be fainter than 18 mag in March. 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) Dec. 21 8 40.42 -43 3.7 3.580 3.930 103 16.7 2:42 ( 0, 82) Dec. 28 8 25.03 -43 27.7 3.562 3.978 108 16.8 1:59 ( 0, 81) 276P/Vorobjov Now it is 16.9 mag (Nov. 30, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting lower gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 2 40.19 8 54.5 3.184 3.899 130 16.8 21:00 (172, 46) Dec. 28 2 39.73 8 44.4 3.268 3.899 123 16.9 21:03 (162, 44) 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 16.7 mag (Nov. 12, ATLAS South Africa). It stays 17 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 6 13.11 -40 47.3 5.665 6.156 115 16.9 0:15 ( 0, 84) Dec. 28 6 6.74 -40 12.9 5.705 6.204 116 16.9 23:36 ( 0, 85) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.8 mag (Nov. 6, 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) Dec. 21 0 49.45 -64 37.3 10.757 10.534 74 16.9 21:00 ( 24, 54) Dec. 28 0 47.25 -63 47.9 10.815 10.541 71 16.9 21:03 ( 28, 52) 32P/Comas Sola It brightened up to 13.5 mag in last winter (Dec. 5, 2023, Chris Wyatt). Now it is 16.6 mag (Nov. 10, J. Nicolas, F. Kugel). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 13 51.86 -4 48.5 3.216 2.884 61 17.0 2:55 (265, 15) Dec. 28 13 59.38 -5 29.4 3.165 2.921 66 17.0 3:00 (262, 21) 242P/Spahr Now it is 17.3 mag (Dec. 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) Dec. 21 3 50.77 -16 50.1 3.275 3.972 129 17.1 21:49 (180, 72) Dec. 28 3 48.43 -16 33.9 3.334 3.972 124 17.2 21:19 (180, 71) 154P/Brewington It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 18.0 mag (Dec. 8, Toshihiko Ikemura, Hirohisa Sato). 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) Dec. 21 9 42.09 32 27.8 1.778 2.525 129 17.2 2:55 (191, 22) Dec. 28 9 37.39 32 45.4 1.764 2.576 137 17.2 3:00 (183, 22) 492P/2024 O3 ( LINEAR ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 17.6 mag (Dec. 8, Toshihiko Ikemura, Hirohisa Sato). 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) Dec. 21 9 46.38 30 15.3 1.635 2.379 128 17.3 2:55 (193, 24) Dec. 28 9 44.29 30 42.2 1.618 2.423 135 17.4 3:00 (184, 24) 49P/Arend-Rigaux It will brighten up to 14 mag in 2025 spring. Now it is 17.3 mag (Dec. 2, ATLAS South Africa). It will brighten rapidly after this. 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) Dec. 21 0 0.77 -22 30.8 1.713 1.855 82 17.4 21:00 ( 96, 49) Dec. 28 0 10.04 -20 40.9 1.737 1.811 78 17.3 21:03 ( 95, 44) (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) Dec. 21 3 24.68 -15 48.6 1.895 2.597 125 17.4 21:23 (180, 71) Dec. 28 3 21.86 -15 49.5 1.911 2.549 120 17.4 21:03 (173, 71) C/2021 S4 ( Tsuchinshan ) Now it is 17.5 mag (Dec. 5, Toshihiko Ikemura, Hirohisa Sato). 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) Dec. 21 7 35.75 41 39.4 6.183 7.070 152 17.4 1:38 (180, 13) Dec. 28 7 33.00 41 48.2 6.169 7.085 157 17.5 1:08 (180, 13) 195P/Hill Now it is 17.3 mag (Dec. 10, 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) Dec. 21 6 48.83 -7 25.2 3.704 4.558 146 17.7 0:51 (180, 62) Dec. 28 6 44.65 -7 57.2 3.684 4.551 148 17.7 0:19 (180, 63) C/2024 G2 ( ATLAS ) Now it is 17.9 mag (May 17, J. L. Virlichie, P. Traverse, H. Roy). 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) Dec. 21 13 1.12 -47 54.8 5.890 5.502 62 17.8 2:55 (306, 43) Dec. 28 13 1.20 -48 7.4 5.791 5.490 67 17.7 3:00 (306, 49) (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 stays extremely low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 21 7 30.33 37 40.4 7.901 8.806 155 17.8 1:33 (180, 17) Dec. 28 7 24.60 37 34.7 7.874 8.810 161 17.7 1:00 (180, 17) 253P/PanSTARRS Now it is 17.4 mag (Nov. 30, ATLAS South Africa). Fading gradually. It will be fainter than 18 mag in January. 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) Dec. 21 1 4.09 0 3.1 1.591 2.081 105 17.8 21:00 (136, 45) Dec. 28 1 12.19 1 7.4 1.676 2.094 100 17.9 21:03 (131, 41) 50P/Arend Now it is 18.3 mag (Dec. 12, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in January. 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) Dec. 21 10 14.34 32 9.3 2.018 2.685 123 17.8 2:55 (198, 20) Dec. 28 10 12.35 32 29.7 1.983 2.722 130 17.8 3:00 (191, 22) C/2023 U1 ( Fuls ) Now it is 17.8 mag (Dec. 1, ATLAS South Africa). 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) Dec. 21 4 25.58 -60 30.7 4.835 5.001 94 17.9 22:22 ( 0, 65) Dec. 28 4 9.21 -60 20.5 4.880 5.007 91 17.9 21:38 ( 0, 65)