Weekly Information about Bright Comets (2024 Dec. 14: South)

Japanese version Home page	Updated on December 14, 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 -1 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 9.7 mag (Dec. 3, Martin Masek). It brightens up to -1 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. 14 16 27.70 -38 7.7 1.860 0.988 19 10.3 2:53 (318, 1) Dec. 21 16 49.54 -35 59.2 1.680 0.818 19 9.3 2:55 (315, 1) 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 9.3 mag (Dec. 8, Yoshimi Nagai). Fading rapidly. 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. 14 19 23.51 5 5.6 2.316 1.690 40 9.5 20:55 ( 85,-16) Dec. 21 19 30.95 5 31.2 2.490 1.804 36 9.9 21:00 ( 81,-22) 333P/LINEAR Now it is 10.8 mag (Dec. 8, Carlos Labordena). It will fade out rapidly after this. It will be fainter than 18 mag in March. 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) Dec. 14 17 17.93 66 24.7 0.565 1.132 89 9.9 2:53 (207,-48) Dec. 21 20 7.02 57 50.0 0.680 1.153 85 10.5 21:00 (140,-35) 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. 14 17 0.31 -13 25.7 3.530 2.573 11 12.0 2:53 (306,-22) Dec. 21 17 11.03 -14 20.1 3.590 2.647 14 12.2 2:55 (303,-18) C/2022 E2 ( ATLAS ) Now it is 12.7 mag (Dec. 8, 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. 14 3 31.32 67 38.8 3.023 3.756 132 12.7 21:56 (180,-13) Dec. 21 2 56.70 66 13.6 3.076 3.770 128 12.8 21:00 (179,-11) C/2023 C2 ( ATLAS ) Now it is 14.1 mag (Nov. 20, Mike Olason). It stays 14 mag for a while. It will be unobservable in January in the Northern Hemisphere, or in March in the Southern Hemisphere. But it will be observable again in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 19 39.07 -17 3.0 3.167 2.388 31 13.3 20:55 ( 69, 0) Dec. 21 19 51.17 -15 6.7 3.221 2.399 28 13.3 21:00 ( 68, -5) 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. 14 16 7.63 -47 56.1 4.303 3.478 29 13.6 2:53 (322, 11) Dec. 21 16 17.50 -48 3.0 4.354 3.553 31 13.7 2:55 (320, 13) 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. 14 10 12.92 8 59.1 5.841 6.250 110 13.8 2:53 (216, 39) Dec. 21 10 12.62 8 53.7 5.738 6.251 117 13.8 2:55 (207, 42) C/2024 M1 ( ATLAS ) Now it is 13.9 mag (Nov. 30, L. Hudin). 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 after this, and it will be unobservable in January. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 4 27.41 22 18.3 0.758 1.731 166 13.8 22:51 (180, 32) Dec. 21 3 55.75 29 39.4 0.817 1.749 152 14.0 21:52 (180, 25) C/2022 QE78 ( ATLAS ) Now it is 15.1 mag (Dec. 1, ATLAS South Africa). 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. 14 6 38.10 3 55.1 4.925 5.826 153 14.2 1:08 (180, 51) Dec. 21 6 35.32 4 17.6 4.881 5.809 158 14.1 0:37 (180, 51) 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. 14 14 45.19 -19 15.0 5.782 5.037 37 14.3 2:53 (289, 7) Dec. 21 14 51.54 -19 9.8 5.717 5.045 43 14.3 2:55 (286, 11) 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 14.9 mag (Dec. 1, Purple Mountain Observatory, XuYi Station). It stays 15 mag for a while. It will be getting lower gradually after this, and 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. 14 22 50.77 -3 54.1 4.371 4.318 80 14.6 20:55 (109, 31) Dec. 21 22 55.40 -3 25.4 4.446 4.290 74 14.6 21:00 (104, 25) C/2024 B1 ( Lemmon ) It brightened up to 13.1 mag in autumn (Nov. 1, Thomas Lehmann). Now it is 15.5 mag (Nov. 28, Ken-ichi Kadota). 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. 14 16 30.26 24 49.7 2.338 1.863 49 14.7 2:53 (265,-39) Dec. 21 16 44.42 23 0.2 2.392 1.908 49 14.9 2:55 (265,-35) 21P/Giacobini-Zinner Now it is 18.2 mag (Oct. 13, F. Kugel, J. Nicolas). It will brighten rapidly after this. In the Northern Hemisphere, it will be unobservable soon. In the Southern Hemisphere, it is not observable now. 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. 14 18 9.15 -2 58.3 2.545 1.682 22 15.2 20:55 ( 66,-26) Dec. 21 18 28.29 -3 5.9 2.489 1.617 21 14.7 21:00 ( 63,-28) P/2023 S1 Now it is 16.1 mag (Dec. 3, ATLAS-MLO, Mauna Loa). It stays 15 mag for a while. It stays observable in good condition. It is fainter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 9 19.76 19 46.9 1.956 2.655 125 14.9 2:53 (196, 34) Dec. 21 9 19.88 19 31.4 1.880 2.649 132 14.8 2:55 (188, 35) C/2024 J2 ( Wierzchos ) Brightening rapidly. Now it is 14.7 mag (Dec. 1, Ken-ichi Kadota). Brightening slowly. It locates somewhat low in the Northern Hemisphere. 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. 14 18 12.58 34 14.5 2.516 2.170 58 15.1 20:55 (106,-44) Dec. 21 18 37.21 33 34.9 2.479 2.125 57 14.9 21:00 (104,-46) C/2023 Q1 ( PanSTARRS ) Now it is 16.0 mag (Nov. 23, Ken-ichi Kadota). 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. 14 8 44.78 74 33.4 1.913 2.579 122 15.0 2:53 (182,-20) Dec. 21 8 44.41 75 12.8 1.903 2.585 123 15.0 2:48 (180,-20) 37P/Forbes Now it is 12.9 mag (Dec. 4, Mike Olason). It will fade out rapidly after this. It will be fainter than 18 mag in March. It will be unobservable in January in the Southern Hemisphere, or in February in the Northern Hemisphere. It is brighter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 20 8.69 -19 26.8 2.400 1.733 38 15.1 20:55 ( 71, 7) Dec. 21 20 28.45 -17 57.9 2.460 1.758 35 15.3 21:00 ( 71, 4) 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 (Nov. 30, Hiroshi Abe). 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. 14 3 5.75 52 21.2 1.032 1.898 140 15.2 21:31 (180, 2) Dec. 21 2 53.80 53 44.9 1.099 1.920 134 15.5 21:00 (179, 1) 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 (Nov. 28, A. Diepvens). 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. 14 20 57.31 32 31.6 4.192 4.054 75 15.4 20:55 (121,-13) Dec. 21 21 6.14 31 58.8 4.328 4.123 71 15.5 21:00 (118,-17) 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. 14 3 46.33 -70 45.1 15.714 15.649 84 15.4 22:11 ( 0, 54) Dec. 21 3 42.83 -70 38.2 15.715 15.626 83 15.4 21:40 ( 0, 54) C/2024 A1 ( ATLAS ) Now it is 16.3 mag (Dec. 3, ATLAS South Africa). It stays 15 mag for a while. 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. 14 7 54.53 -25 49.6 3.616 4.185 119 15.5 2:24 (180, 81) Dec. 21 7 47.57 -25 6.1 3.525 4.162 124 15.4 1:49 (180, 80) 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. 14 6 31.57 9 31.9 2.614 3.551 159 15.5 1:01 (180, 45) Dec. 21 6 27.72 9 22.8 2.610 3.566 164 15.6 0:30 (180, 46) C/2023 H5 ( Lemmon ) It will be observable at 15 mag for a long time in 2025 in the Northern Hemisphere. Now it is 16.3 mag (Dec. 2, Hirohisa Sato). It stays 15 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. 14 12 16.35 32 49.6 4.462 4.612 92 15.7 2:53 (226, 3) Dec. 21 12 19.82 34 32.3 4.340 4.592 98 15.6 2:55 (221, 6) 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). Fading slowly. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 5 55.85 20 36.7 6.520 7.497 172 15.6 0:26 (180, 34) Dec. 21 5 51.30 20 52.0 6.568 7.551 177 15.7 23:49 (180, 34) 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. 14 1 41.58 14 56.2 2.241 2.937 126 15.7 20:55 (165, 39) Dec. 21 1 42.20 14 32.0 2.298 2.912 119 15.7 21:00 (156, 37) 48P/Johnson Now it is 16.6 mag (Oct. 9, Hidetaka Sato). Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. 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. 14 19 4.40 -23 23.4 2.974 2.100 22 15.9 20:55 ( 59, -2) Dec. 21 19 21.69 -23 16.6 2.986 2.084 19 15.8 21:00 ( 57, -5) 496P/2024 S3 ( Hill ) First return of a new periodic comet which brightened up to 15 mag in 2010. It is expected to brighten up to 15 mag from winter to spring, and it will be observable in excellent condition in the Northern Hemisphere. Now it is 17.0 mag (Nov. 30, ATLAS South Africa). 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. 14 2 14.25 10 24.7 1.083 1.894 132 16.0 20:55 (175, 44) Dec. 21 2 12.77 11 53.6 1.100 1.856 125 15.9 21:00 (164, 41) C/2022 R6 ( PanSTARRS ) Now it is 16.8 mag (Dec. 1, 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. 14 7 2.97 -30 46.5 6.223 6.786 121 15.9 1:32 (180, 86) Dec. 21 7 0.40 -30 41.7 6.178 6.774 123 15.9 1:02 (180, 86) 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 March. 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. 14 0 18.46 6 42.1 0.850 1.455 104 16.1 20:55 (138, 38) Dec. 21 0 40.74 7 6.0 0.902 1.475 102 16.1 21:00 (135, 36) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 15.8 mag (Nov. 14, ATLAS Chile). It stays 16 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. 14 20 59.48 -62 51.1 6.771 6.230 53 16.1 20:55 ( 33, 34) Dec. 21 21 2.98 -62 18.8 6.875 6.285 49 16.2 21:00 ( 33, 31) C/2023 T3 ( Fuls ) Now it is 16.8 mag (Nov. 30, ATLAS South Africa). 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. 14 12 29.67 -28 5.0 3.857 3.569 65 16.2 2:53 (281, 38) Dec. 21 12 37.45 -29 8.3 3.770 3.563 70 16.1 2:55 (279, 43) 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. 14 1 49.04 7 33.2 1.946 2.645 125 16.1 20:55 (166, 46) Dec. 21 1 50.19 8 1.9 2.059 2.679 119 16.3 21:00 (155, 44) 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. 14 6 55.44 -51 0.9 6.119 6.416 103 16.1 1:25 ( 0, 74) Dec. 21 6 45.36 -51 16.7 6.143 6.460 104 16.2 0:47 ( 0, 74) 30P/Reinmuth 1 Now it is 16.5 mag (Nov. 2, Martin Masek). 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 higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Dec. 14 13 36.69 -3 26.8 2.436 2.100 58 16.1 2:53 (266, 12) Dec. 21 13 49.03 -4 16.7 2.396 2.131 62 16.2 2:55 (264, 16) (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. 14 2 37.97 31 42.2 0.898 1.780 142 16.3 21:03 (180, 23) Dec. 21 2 17.09 28 33.3 0.905 1.717 130 16.4 21:00 (169, 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) Dec. 14 13 44.20 -42 45.8 5.791 5.205 49 16.5 2:53 (304, 30) Dec. 21 13 43.60 -43 20.7 5.702 5.201 55 16.4 2:55 (302, 35) 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. 14 12 34.04 -54 21.6 9.686 9.256 61 16.5 2:53 (315, 43) Dec. 21 12 36.25 -55 1.7 9.667 9.300 65 16.6 2:55 (316, 47) 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. 14 22 10.92 19 30.5 5.588 5.530 81 16.7 20:55 (121, 8) Dec. 21 22 10.39 18 52.7 5.660 5.487 74 16.7 21:00 (115, 2) C/2022 L2 ( ATLAS ) Now it is 16.7 mag (Dec. 2, ATLAS South Africa). 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. 14 8 54.58 -42 22.2 3.609 3.882 98 16.7 2:53 (323, 80) Dec. 21 8 40.42 -43 3.7 3.580 3.930 103 16.7 2:42 ( 0, 82) 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. 14 2 41.45 9 10.0 3.108 3.899 138 16.8 21:08 (180, 46) Dec. 21 2 40.19 8 54.5 3.184 3.899 130 16.8 21:00 (172, 46) 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. 14 6 19.61 -41 12.7 5.634 6.107 114 16.8 0:49 ( 0, 84) Dec. 21 6 13.11 -40 47.3 5.665 6.156 115 16.9 0:15 ( 0, 84) 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. 14 0 52.50 -65 25.3 10.696 10.526 77 16.9 20:55 ( 18, 56) Dec. 21 0 49.45 -64 37.3 10.757 10.534 74 16.9 21:00 ( 24, 54) 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. 14 13 43.77 -4 3.1 3.264 2.847 56 16.9 2:53 (268, 11) Dec. 21 13 51.86 -4 48.5 3.216 2.884 61 17.0 2:55 (265, 15) 154P/Brewington It brightened up to 12.0 mag in June (June 13, Ken-ichi Kadota). Now it is 18.0 mag (Nov. 28, Ken-ichi Kadota). 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. 14 9 45.04 32 11.7 1.800 2.475 122 17.1 2:53 (198, 20) Dec. 21 9 42.09 32 27.8 1.778 2.525 129 17.2 2:55 (191, 22) 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. 14 3 53.70 -16 57.1 3.225 3.972 133 17.1 22:19 (180, 72) Dec. 21 3 50.77 -16 50.1 3.275 3.972 129 17.1 21:49 (180, 72) 492P/2024 O3 ( LINEAR ) First return of a new periodic comet which brightened up to 15 mag in 2010. Now it is 19.1 mag (Nov. 28, Yasukazu Ikari). 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. 14 9 46.70 29 51.7 1.659 2.335 122 17.3 2:53 (199, 22) Dec. 21 9 46.38 30 15.3 1.635 2.379 128 17.3 2:55 (193, 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. 14 23 52.71 -24 12.5 1.687 1.899 86 17.4 20:55 ( 97, 55) Dec. 21 0 0.77 -22 30.8 1.713 1.855 82 17.4 21:00 ( 96, 49) (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. 14 3 28.54 -15 32.6 1.886 2.646 131 17.4 21:54 (180, 70) Dec. 21 3 24.68 -15 48.6 1.895 2.597 125 17.4 21:23 (180, 71) C/2021 S4 ( Tsuchinshan ) Now it is 17.8 mag (Nov. 6, 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. 14 7 38.17 41 28.4 6.211 7.056 146 17.4 2:08 (180, 14) Dec. 21 7 35.75 41 39.4 6.183 7.070 152 17.4 1:38 (180, 13) 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. 14 0 56.86 -0 56.2 1.509 2.070 110 17.6 20:55 (143, 50) Dec. 21 1 4.09 0 3.1 1.591 2.081 105 17.8 21:00 (136, 45) 195P/Hill Now it is 17.5 mag (Dec. 1, 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) Dec. 14 6 52.74 -6 46.5 3.738 4.565 143 17.7 1:22 (180, 62) Dec. 21 6 48.83 -7 25.2 3.704 4.558 146 17.7 0:51 (180, 62) 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. 14 13 0.30 -47 42.0 5.982 5.514 57 17.8 2:53 (307, 38) Dec. 21 13 1.12 -47 54.8 5.890 5.502 62 17.8 2:55 (306, 43) (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. 14 7 35.82 37 43.7 7.945 8.801 148 17.9 2:06 (180, 17) Dec. 21 7 30.33 37 40.4 7.901 8.806 155 17.8 1:33 (180, 17) 50P/Arend Now it is 18.8 mag (Dec. 1, Yasukazu Ikari). 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. 14 10 14.70 31 52.7 2.059 2.649 116 17.8 2:53 (205, 18) Dec. 21 10 14.34 32 9.3 2.018 2.685 123 17.8 2:55 (198, 20) 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. 14 4 42.76 -60 23.1 4.797 4.996 95 17.9 23:06 ( 0, 65) Dec. 21 4 25.58 -60 30.7 4.835 5.001 94 17.9 22:22 ( 0, 65) C/2024 A2 ( ATLAS ) Now it is 17.8 mag (Nov. 30, Ken-ichi Kadota). Fading gradually. It will be fainter than 18 mag soon. 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. 14 3 46.27 41 41.1 2.316 3.220 152 17.9 22:11 (180, 13) Dec. 21 3 27.36 41 38.3 2.431 3.279 144 18.2 21:25 (180, 13)