Weekly Information about Bright Comets (2026 Jan. 17: South)

Japanese version Home page	Updated on January 23, 2026
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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 E1 ( Wierzchos ) It was originally expected to brighten up to 5 mag in January. But actually, the brightness evolution was slower than originally expected. Now it is 9.6 mag (Dec. 10, Mike Olason). It will turn to fade out rapidly after the peak. In the Northern Hemisphere, it is not observable now, but it will appear in February. It locates somewhat low in the Southern Hemisphere. Nagy Barnabas reported it is visible at 8 mag on Dec. 24 in the SOHO spacecraft LASCO images. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 20 22.96 -37 35.9 1.423 0.573 17 7.9 20:57 ( 41, -1) Jan. 24 21 15.05 -41 29.6 1.290 0.571 24 7.7 20:51 ( 42, 6) C/2025 A6 ( Lemmon ) It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Appearing in the morning sky in the Southern Hemisphere. Now it is brighter than originally predicted by 4 mag. Now it is 8.8 mag (Jan. 21, Chris Wyatt). Fading rapidly. In the Northern Hemisphere, it is not observable now, but it will appear in April. 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. 17 17 8.96 -44 42.2 2.091 1.502 41 8.3 3:22 (309, 23) Jan. 24 17 5.96 -47 8.7 2.083 1.613 48 8.7 3:31 (309, 31) 24P/Schaumasse Now it is 9.2 mag (Jan. 18, Marco Goiato). It will fade out rapidly after this. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 13 53.09 11 17.0 0.600 1.190 94 8.9 3:22 (228, 29) Jan. 24 14 15.99 10 4.2 0.607 1.202 95 9.0 3:31 (226, 32) 88P/Howell Now it is 14.5 mag (Jan. 14, Mike Olason). Brightening slowly. It stays extremely low in the Northern Hemisphere. But it will become high in summer. It locates somewhat low in the Southern Hemisphere. But it will become high in summer. It is fainter than this ephemeris recently. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 17 47.42 -24 0.0 2.289 1.511 29 11.4 3:22 (295, 6) Jan. 24 18 12.61 -24 13.3 2.237 1.480 30 11.1 3:31 (294, 8) C/2025 T1 ( ATLAS ) It brightened up to 9.0 mag from late November to early December (Nov. 22, Thomas Lehmann). Now it is 10.7 mag (Jan. 12, Mike Olason). Fading rapidly. It will be fainter than 18 mag in May. It stays extremely low in the Northern Hemisphere. 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. 17 21 2.63 -7 35.2 2.198 1.329 21 11.8 20:57 ( 69,-16) Jan. 24 21 12.04 -9 46.7 2.319 1.392 15 12.3 20:51 ( 65,-16) 240P/NEAT Now it is 11.5 mag (Jan. 9, Mitsunori Tsumura). Fading gradually. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. The component B also brightened rapidly. Now it is bright as 14.9 mag (Jan. 9, Mitsunori Tsumura). Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 3 21.26 20 6.0 1.503 2.133 116 12.1 20:57 (157, 31) Jan. 24 3 25.15 21 44.0 1.583 2.140 110 12.3 20:51 (154, 28) 235P/LINEAR It became brighter than expected. Now it is 13.8 mag (Jan. 21, Chris Wyatt). 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. 17 15 10.69 -17 18.3 2.164 1.988 66 13.1 3:22 (269, 33) Jan. 24 15 25.57 -17 44.9 2.102 1.995 70 13.1 3:31 (266, 38) 3I/2025 N1 ( ATLAS ) Third interstellar object in history following 1I/'Oumuamua and 2I/Borisov. The eccentricity is extremely big as 6. It approached to Sun down to 1.38 a.u. in late October. It brightened up to 8.9 mag in November (Nov. 12, Toshiyuki Takahashi). Now it is 12.8 mag (Jan. 20, Chris Wyatt). Fading rapidly. It will be fainter than 18 mag in March. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 8 35.29 16 21.8 2.198 3.170 169 13.5 0:53 (180, 39) Jan. 24 8 10.77 17 35.3 2.412 3.395 176 14.1 0:01 (180, 38) 29P/Schwassmann-Wachmann 1 It brightened in outburst on Dec. 5. Now it is 12.4 mag (Jan. 21, Chris Wyatt). It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 11 33.69 -3 39.7 5.745 6.307 120 13.8 3:22 (193, 58) Jan. 24 11 32.58 -3 43.1 5.652 6.308 128 13.8 3:21 (180, 59) C/2022 N2 ( PanSTARRS ) Now it is 14.1 mag (Jan. 3, Toru Yusa). Fading slowly. 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. 17 3 14.93 24 21.8 3.572 4.102 116 13.9 20:57 (157, 27) Jan. 24 3 17.53 24 19.5 3.688 4.124 109 14.0 20:51 (153, 25) C/2025 L1 ( ATLAS ) It is expected to brighten up to 13.5 mag and to be observable in good condition in 2026 spring. Now it is 16.0 mag (Jan. 2, Hidetaka Sato). Fading 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) Jan. 17 15 55.97 -32 29.5 2.062 1.680 53 14.3 3:22 (290, 31) Jan. 24 15 59.22 -29 52.2 1.941 1.686 60 14.2 3:31 (284, 37) C/2022 QE78 ( ATLAS ) Now it is 14.6 mag (Jan. 11, Yoshimi Nagai). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 9 21.67 26 10.4 4.624 5.555 159 14.3 1:38 (180, 29) Jan. 24 9 19.29 26 57.4 4.606 5.564 165 14.3 1:08 (180, 28) 78P/Gehrels 2 It will brighten up to 12 mag in 2026 summer. Now it is 16.2 mag (Dec. 28, Francois Kugel). Brightening slowly. In the Northern Hemisphere, it will be unobservable in February. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 22 5.70 -8 1.8 3.121 2.373 34 14.6 20:57 ( 78, -3) Jan. 24 22 18.54 -7 1.0 3.140 2.345 30 14.5 20:51 ( 78, -5) C/2024 J3 ( ATLAS ) It will brighten up to 13 mag in 2026. Now it is 14.6 mag (Dec. 19, Kunihiro Shima). Brightening slowly. 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 February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 19 26.89 -2 22.9 5.621 4.706 19 14.7 3:22 (294,-27) Jan. 24 19 32.19 -1 26.2 5.572 4.673 21 14.6 3:31 (288,-21) C/2024 T5 ( ATLAS ) Now it is 14.5 mag (Jan. 7, Ken-ichi Kadota). It stays 14 mag for a while. In the Northern Hemisphere, it will be unobservable in March. In the Southern Hemisphere, it stays observable in good condition. It is expected to brighten up to 11 mag in winter between 2026 and 2027. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 2 35.64 -38 20.3 5.555 5.554 84 14.7 20:57 ( 74, 64) Jan. 24 2 36.59 -37 4.2 5.583 5.514 80 14.7 20:51 ( 75, 60) 210P/Christensen It brightened up to 9.5 mag in late November (Nov. 28, Michael Jager, Gerald Rhemann, E. Prosperi). Now it is 13.9 mag (Jan. 11, Ken-ichi Kadota). Fading rapidly. 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 getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 15 30.01 -8 30.3 1.189 1.175 64 14.8 3:22 (263, 25) Jan. 24 15 37.95 -8 22.2 1.216 1.274 69 15.3 3:31 (258, 30) C/2021 G2 ( ATLAS ) Now it is 15.2 mag (Jan. 3, Ken-ichi Kadota). It stays 15 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) Jan. 17 17 1.44 1 10.8 6.847 6.227 47 14.8 3:22 (268, 0) Jan. 24 17 6.04 1 41.6 6.802 6.257 52 14.8 3:31 (263, 7) C/2014 UN271 ( Bernardinelli-Bernstein ) Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.6 mag (Jan. 20, Chris Wyatt). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 4 50.27 -74 22.6 14.481 14.349 80 14.9 21:01 ( 0, 51) Jan. 24 4 47.36 -74 5.9 14.458 14.327 80 14.9 20:51 ( 2, 51) C/2025 R2 ( SWAN ) It brightened up to 5.2 mag in October (Oct. 11, Virgilio Gonano). Now it is 14.7 mag (Jan. 9, Toru Yusa). Fading rapidly. It will be fainter than 18 mag in March. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 1 22.32 13 39.5 2.182 2.356 87 15.1 20:57 (127, 22) Jan. 24 1 31.72 14 23.2 2.371 2.453 82 15.5 20:51 (125, 19) 40P/Vaisala 1 It became brighter than expected. Now it is 14.9 mag (Dec. 27, Kunihiro Shima). Fading slowly. 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) Jan. 17 15 56.01 -10 18.0 2.273 1.940 58 15.1 3:22 (269, 20) Jan. 24 16 11.29 -10 43.4 2.238 1.965 61 15.2 3:31 (266, 25) C/2023 R1 ( PanSTARRS ) Now it is 15.3 mag (Dec. 19, Kunihiro Shima). It stays 15 mag for a while. 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 February. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 19 25.93 -2 38.3 4.568 3.656 19 15.2 3:22 (294,-26) Jan. 24 19 28.04 -2 52.6 4.541 3.642 21 15.2 3:31 (288,-20) C/2025 R3 ( PanSTARRS ) It is expected to brighten up to 7 mag in April. Now it is 16.5 mag (Dec. 21, Alfons Diepvens). It will brighten rapidly after this. In the Northern Hemisphere, 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 May. At the high light, it is observable in the low sky before the perihelion passage in the Northern Hemisphere, or after the perihelion in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 22 12.22 18 40.2 2.323 1.884 52 16.1 20:57 (101,-17) Jan. 24 22 12.92 18 8.8 2.312 1.777 46 15.8 20:51 ( 98,-21) C/2022 R6 ( PanSTARRS ) Now it is 16.1 mag (Jan. 12, 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) Jan. 17 8 48.69 -10 19.1 5.797 6.636 146 16.0 1:05 (180, 65) Jan. 24 8 46.10 -9 43.9 5.769 6.643 150 16.0 0:35 (180, 65) C/2025 K1 ( ATLAS ) It brightened up to 9.3 mag in November (Nov. 2, Virgilio Gonano). The nucleus was split into four components. Now it is 15.8 mag (Jan. 7, Thomas Lehmann). Fading rapidly. It will be fainter than 18 mag in February. In the Northern Hemisphere, it will be getting lower gradually. 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. 17 1 2.11 33 54.1 1.828 2.096 91 16.2 20:57 (137, 4) Jan. 24 1 6.08 32 58.6 2.055 2.203 85 16.7 20:51 (134, 2) C/2024 R4 ( PanSTARRS ) It brightened rapidly. It is expected to brighten up to 13.5 mag from 2027 to 2028. Now it is 16.2 mag (Jan. 4, Alfons Diepvens). It stays 16 mag for a while. It locates somewhat low in the Northern Hemisphere. But it will become high in spring. 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. 17 21 38.19 21 36.0 7.325 6.727 49 16.3 20:57 (100,-25) Jan. 24 21 40.72 21 56.2 7.344 6.689 45 16.3 20:51 ( 98,-29) C/2025 J1 ( Borisov ) Now it is 16.4 mag (Jan. 7, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 5 59.75 76 19.7 3.193 3.815 122 16.3 22:12 (180,-21) Jan. 24 5 31.06 73 55.3 3.197 3.794 120 16.3 21:17 (180,-19) C/2025 Q3 ( ATLAS ) Now it is 15.9 mag (Jan. 12, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually after this, and it will be unobservable in March. 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. 17 2 2.67 -12 2.1 1.967 2.164 87 16.3 20:57 (112, 47) Jan. 24 2 3.66 -13 51.7 2.072 2.147 80 16.4 20:51 (106, 44) C/2022 E2 ( ATLAS ) It was observed at 12-13 mag for a long time in 2024. Now it is 15.9 mag (Jan. 2, ATLAS-MLO, Mauna Loa). It stays 17 mag for a while. 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 April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 22 35.02 30 12.3 5.943 5.583 64 16.4 20:57 (115,-18) Jan. 24 22 37.68 29 37.9 6.074 5.625 58 16.5 20:51 (112,-22) 145P/Shoemaker-Levy 5 Now it is 16.4 mag (Jan. 7, ATLAS-HKO, Haleakala). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it will be unobservable in March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 0 6.09 1 19.1 2.080 1.895 65 16.4 20:57 (104, 16) Jan. 24 0 19.78 3 23.8 2.137 1.891 62 16.4 20:51 (104, 13) 164P/Christensen Now it is 16.5 mag (Jan. 9, Mitsunori Tsumura). Fading slowly. It will be fainter than 18 mag in April. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 11 26.85 24 58.8 1.911 2.663 131 16.5 3:22 (186, 30) Jan. 24 11 24.66 26 9.0 1.891 2.704 137 16.5 3:13 (180, 29) 493P/2024 Q2 ( LONEOS ) Now it is 16.6 mag (Jan. 10, Hirohisa Sato). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be unobservable in April. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 4 23.08 51 46.9 3.127 3.823 129 16.5 20:57 (177, 3) Jan. 24 4 22.57 51 9.3 3.192 3.823 123 16.5 20:51 (173, 3) 93P/Lovas 1 Now it is 17.2 mag (Jan. 4, Alfons Diepvens). Brightening slowly. It will be unobservable soon in the Southern Hemisphere, or in March in the Northern Hemisphere. It will brighten up to 15.5 mag in spring. But it is not observable around the perihelion passage. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 22 42.43 -4 31.4 2.587 1.999 43 16.8 20:57 ( 86, 2) Jan. 24 22 55.87 -2 46.3 2.603 1.964 40 16.7 20:51 ( 87, 0) 261P/Larson Now it is 16.4 mag (Jan. 5, WFST, Lenghu). Fading gradually. It will be fainter than 18 mag in April. 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) Jan. 17 22 58.27 -1 29.1 2.527 2.021 48 16.7 20:57 ( 91, 4) Jan. 24 23 13.09 0 1.7 2.586 2.026 45 16.7 20:51 ( 91, 2) 43P/Wolf-Harrington Now it is 16.5 mag (Jan. 11, ATLAS-MLO, Mauna Loa). Fading slowly. It will be fainter than 18 mag in May. It stays observable in good condition. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 11 15.92 -8 41.6 2.055 2.711 122 16.7 3:22 (186, 64) Jan. 24 11 15.30 -9 4.5 2.003 2.732 129 16.7 3:04 (180, 64) C/2024 A1 ( ATLAS ) Now it is 16.4 mag (Jan. 4, Ken-ichi Kadota). Fading slowly. It will be fainter than 18 mag in May. 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. 17 7 49.65 60 0.9 3.502 4.309 140 16.7 0:08 (180, -5) Jan. 24 7 34.83 61 19.2 3.562 4.336 137 16.7 23:20 (180, -6) 195P/Hill Now it is 17.4 mag (Jan. 11, 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) Jan. 17 9 52.33 -33 10.6 3.942 4.503 119 16.7 2:08 (180, 88) Jan. 24 9 49.24 -33 39.6 3.893 4.508 123 16.7 1:38 (180, 89) C/2023 F3 ( ATLAS ) Now it is 16.9 mag (Jan. 8, 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. 17 10 30.19 -24 21.4 5.241 5.809 120 16.7 2:46 (180, 80) Jan. 24 10 23.22 -23 56.5 5.176 5.832 127 16.7 2:12 (180, 79) 218P/LINEAR It will brighten up to 16 mag in spring. Now it is 16.8 mag (Dec. 30, Hidenori Nohara). Brightening 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) Jan. 17 15 29.08 -18 11.2 1.390 1.272 62 17.1 3:22 (272, 30) Jan. 24 16 0.07 -19 36.0 1.345 1.235 61 16.8 3:31 (273, 32) C/2023 H5 ( Lemmon ) Now it is 16.6 mag (Dec. 26, Kunihiro Shima). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 19 9.80 61 51.7 4.631 4.618 83 16.9 3:22 (215,-45) Jan. 24 19 28.21 61 39.5 4.677 4.639 81 16.9 3:31 (215,-42) C/2024 G6 ( ATLAS ) Now it is 17.0 mag (July 25, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 16 32.19 -5 38.9 7.005 6.434 51 16.9 3:22 (270, 10) Jan. 24 16 33.98 -5 0.3 6.905 6.433 57 16.9 3:31 (264, 17) C/2023 X2 ( Lemmon ) Now it is 17.0 mag (Nov. 29, Ken-ichi Kadota). It stays 17 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 19 38.79 82 21.6 4.775 5.091 103 16.9 3:22 (188,-39) Jan. 24 19 59.33 81 53.5 4.808 5.093 101 16.9 3:31 (189,-39) (306173) 2010 NK83 Peculiar asteroid moving along a cometary orbit. Now it is 17.3 mag (Jan. 5, Guy Wells). 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. 17 7 51.82 25 1.7 1.618 2.600 175 16.9 0:09 (180, 30) Jan. 24 7 47.43 25 47.7 1.645 2.619 169 17.1 23:32 (180, 29) C/2023 C2 ( ATLAS ) It brightened up to 12.7 mag in 2024 summer (Aug. 7, 2024, Thomas Lehmann). Now it is 16.9 mag (Jan. 12, ATLAS-HKO, Haleakala). Fading slowly. It will be fainter than 18 mag in April. 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. 17 23 9.52 47 58.1 4.994 4.945 81 16.9 20:57 (135,-21) Jan. 24 23 17.54 47 53.4 5.118 5.000 77 17.0 20:51 (133,-23) C/2023 RS61 ( PanSTARRS ) Although it is around 20 mag usually, now it is bright in outburst. Now it is 17.5 mag (Jan. 7, W. Hasubick). It stays 17 mag for a while. It will be unobservable in March in the Southern Hemisphere, or in May in the Northern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 2 42.16 36 23.0 8.346 8.756 111 17.0 20:57 (155, 13) Jan. 24 2 42.55 36 11.1 8.441 8.746 104 17.0 20:51 (151, 11) 123P/West-Hartley It will brighten up to 15 mag from autumn to winter in 2026. Now it is 17.7 mag (Jan. 7, Hirohisa Sato). It stays 17 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. 17 3 18.85 27 30.2 2.227 2.822 117 17.1 20:57 (159, 24) Jan. 24 3 19.64 27 40.5 2.287 2.792 110 17.0 20:51 (155, 22) 47P/Ashbrook-Jackson Now it is 16.9 mag (Jan. 7, Thomas Lehmann). It stays 18 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) Jan. 17 23 40.91 1 37.9 3.211 2.846 59 17.2 20:57 (100, 11) Jan. 24 23 49.80 2 50.2 3.297 2.853 55 17.3 20:51 ( 99, 7) C/2019 E3 ( ATLAS ) Very far object. Now it is 16.6 mag (Oct. 19, 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 March. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 0 5.84 -49 22.4 11.650 11.142 56 17.3 20:57 ( 51, 38) Jan. 24 0 6.89 -48 40.5 11.718 11.156 53 17.3 20:51 ( 51, 35) C/2024 G2 ( ATLAS ) Now it is 17.3 mag (Jan. 11, ATLAS-MLO, Mauna Loa). 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. 17 12 6.93 -8 15.7 5.148 5.584 111 17.5 3:22 (211, 60) Jan. 24 12 3.90 -7 22.1 5.047 5.599 119 17.5 3:31 (191, 62) C/2017 K2 ( PanSTARRS ) It brightened up to 8 mag from 2022 summer to 2023 spring. Now it is 17.9 mag (Jan. 11, ATLAS-HKO, Haleakala). 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. 17 5 40.30 31 0.9 9.553 10.404 148 17.6 21:53 (180, 24) Jan. 24 5 37.57 31 3.9 9.670 10.452 140 17.7 21:23 (180, 24) 302P/Lemmon-PanSTARRS It brightened very rapidly, and it became brighter than expected. Now it is 17.1 mag (Dec. 26, ATLAS-HKO, Haleakala). Fading slowly. It will be fainter than 18 mag in February. In the Northern Hemisphere, it will be getting lower gradually. It locates somewhat low in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 0 43.08 -1 35.4 3.730 3.566 72 17.6 20:57 (107, 25) Jan. 24 0 48.98 -0 49.1 3.838 3.577 67 17.7 20:51 (105, 21) C/2020 V2 ( ZTF ) It was observed at 9-10 mag for a long time in 2023. Now it is 16.9 mag (Sept. 29, 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 will be getting higher gradually. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 19 42.97 -64 45.4 9.863 9.180 43 17.7 3:22 (340, 17) Jan. 24 19 47.96 -64 44.1 9.888 9.229 45 17.7 3:31 (337, 20) 217P/LINEAR It brightened up to 12.1 mag in early summer (June 10, Taras Prystavski). Now it is 17.7 mag (Dec. 30, Taras Prystavski). Fading gradually. 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. 17 8 49.78 17 44.2 1.866 2.832 166 17.7 1:07 (180, 37) Jan. 24 8 42.26 18 39.0 1.903 2.885 175 17.9 0:32 (180, 36) P/2023 S1 ( PanSTARRS ) It brightened up to 13.7 mag in last winter (Jan. 4, 2025, W. Pei). 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. 17 14 58.81 -25 32.4 3.451 3.200 67 17.8 3:22 (276, 40) Jan. 24 15 5.93 -26 18.0 3.377 3.220 72 17.8 3:31 (273, 46) C/2024 X2 ( ATLAS ) Now it is 17.5 mag (Dec. 26, Hidenori Nohara). Fading slowly. 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. 17 8 31.76 7 21.5 3.077 4.031 163 17.8 0:49 (180, 48) Jan. 24 8 22.23 9 20.6 3.083 4.056 169 17.9 0:12 (180, 46) C/2019 U5 ( PanSTARRS ) Now it is 17.8 mag (Dec. 28, Jean-Claude Merlin). It stays 18 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. 17 4 34.95 -45 59.2 8.738 8.951 99 17.8 20:57 ( 9, 79) Jan. 24 4 30.89 -45 21.6 8.830 8.995 96 17.9 20:51 ( 31, 78) 276P/Vorobjov Now it is 17.7 mag (Jan. 7, Ken-ichi Kadota). Fading slowly. 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. 17 6 41.26 4 51.9 3.362 4.281 156 17.8 22:54 (180, 50) Jan. 24 6 37.75 5 3.2 3.409 4.293 150 17.9 22:23 (180, 50) C/2026 A1 ( MAPS ) Kreutz sungrazer comet discovered furthest from Sun in history. It will approach to Sun down to 0.005 a.u. on Apr. 4. Now it is 17.7 mag (Jan. 15, Adriano Valvasori). It will brighten rapidly after this. It will be unobservable in March. But it will be observable again in April in the Southern Hemisphere. Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h) Jan. 17 5 0.52 -33 8.7 1.403 1.992 111 18.2 21:11 (180, 88) Jan. 24 4 34.05 -31 52.6 1.358 1.870 104 17.9 20:51 (113, 82) 489P/Denning It had been lost for 113 years. It passed the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. It stays 22 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. 17 12 56.83 -1 40.7 1.106 1.635 102 21.8 3:22 (224, 48) Jan. 24 13 6.39 -2 50.4 1.075 1.659 107 21.7 3:31 (216, 53)