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Now it is bright as 8.3 mag (Nov. 23, Chris Wyatt). It is observable at 8 mag for a long time from 2022 to 2023. In the Southern Hemisphere, it stays observable for a long time, although it becomes low temporarily from November to December. In the Northern Hemisphere, it is not observable until 2023 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 17 49.08 -59 19.7 2.497 1.797 36 7.9 18:21 ( 36,-31)
Dec. 24 18 13.50 -62 2.7 2.458 1.798 38 7.9 18:24 ( 33,-33)
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Now it is very bright as 8.3 mag (Dec. 18, Michael Jager). It will approach to Earth down to 0.29 a.u. in February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition for a long time, although it became extremely low temporarily in November. In the Southern Hemisphere, it is not observable until early February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 15 53.59 26 46.5 1.423 1.194 55 8.5 5:31 (257, 30)
Dec. 24 15 53.76 28 20.7 1.251 1.158 61 8.1 5:34 (259, 37)
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Now it is 10.9 mag (Dec. 19, Osamu Miyazaki). It stays bright as 10 mag for a long time until 2023 autumn. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it stays unobservable until 2023 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 29.95 83 58.1 2.167 2.750 116 10.1 3:56 (180, 41)
Dec. 24 5 18.96 85 44.7 2.106 2.706 117 9.9 22:50 (180, 39)
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Now it is very bright as 10.4 mag (Nov. 23, Chris Wyatt). It will be fading after this. In the Southern Hemisphere, it becomes unobservable temporarily from December to January. In the Northern Hemisphere, it is not observable until spring when it fades down to 15 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 19 29.25 -38 34.7 2.410 1.613 28 11.1 18:21 ( 47, -7)
Dec. 24 19 28.07 -38 20.5 2.492 1.629 22 11.3 18:24 ( 51,-12)
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It brightened up to 8.3 mag in last winter (Jan. 6, Toshiyuki Takahashi). Now it is fading. But it is bright as 11.5 mag still now (Dec. 19, Osamu Miyazaki).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 59.76 -27 57.7 4.426 4.674 98 11.3 4:19 ( 0, 27)
Dec. 24 9 58.26 -29 17.0 4.384 4.713 103 11.3 3:50 ( 0, 26)
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Brightening very rapidly. Now it is very bright as 10.7 mag (Dec. 19, Osamu Miyazaki). It stays 10-11 mag until March. In the Northern Hemisphere, it will be observable in good condition after this. In the Southern Hemisphere, it is not observable until 2023 June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 14 27.48 38 50.0 1.896 1.919 76 11.6 5:31 (250, 51)
Dec. 24 14 55.90 42 60.0 1.790 1.883 79 11.4 5:34 (243, 52)
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Now it is 11.7 mag (Dec. 19, Osamu Miyazaki). Appearing in the morning sky also in the Southern Hemisphere. It stays 11-12 mag until spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 13 50.70 -9 27.2 1.932 1.598 55 11.5 5:31 (312, 32)
Dec. 24 14 10.06 -11 0.1 1.892 1.601 57 11.5 5:34 (316, 32)
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Now it is 13.4 mag (Nov. 12, Thomas Lehmann). It is expected to brighten up to 11 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from November to January. In the Northern Hemisphere, it is not observable until 2024 autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 18 9.44 -22 49.7 4.347 3.374 7 12.1 18:21 ( 70,-12)
Dec. 24 18 16.57 -23 57.9 4.330 3.347 2 12.0 18:24 ( 72,-17)
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Now it is 13.2 mag (Nov. 16, Ken-ichi Kadota). It is expected to brighten up to 12 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. It is appearing in the morning sky also in the Southern Hemisphere. It stays observable in good condition after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 13 52.73 5 10.8 4.107 3.741 61 12.9 5:31 (299, 42)
Dec. 24 13 52.61 4 27.9 3.979 3.726 68 12.8 5:34 (308, 47)
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Now it is bright as 12.9 mag (Nov. 21, Ken-ichi Kadota). It stays 12 mag for a while. It stays observable in good condition for a while after this. It will be observable after January also in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 14 52.75 -1 42.2 5.166 4.528 45 12.9 5:31 (293, 27)
Dec. 24 14 59.42 -1 15.8 5.106 4.548 50 12.9 5:34 (298, 32)
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Outburst occured in early October. Now it is very bright as 11.8 mag (Dec. 14, Osamu Miyazaki). It stays observable only until February in the Southern Hemisphere, or until March in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 22 35.70 -19 13.8 1.855 1.760 68 12.9 18:21 ( 24, 32)
Dec. 24 22 52.82 -17 0.9 1.978 1.824 66 13.3 18:24 ( 29, 33)
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Now it is 13.4 mag (Nov. 26, Toshihiko Ikemura, Hirohisa Sato). It stays bright as 13 mag and observable in excellent condition until February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 8 43.03 7 35.4 1.024 1.839 132 13.0 3:02 ( 0, 62)
Dec. 24 8 44.68 7 58.8 0.985 1.847 139 13.0 2:36 ( 0, 63)
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It brightened in major outburst in late November. Now it is very bright as 11.8 mag (Dec. 18, Osamu Miyazaki).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 6 45.15 29 27.8 5.103 6.053 163 13.4 1:05 ( 0, 84)
Dec. 24 6 41.43 29 28.6 5.083 6.055 170 13.4 0:34 ( 0, 84)
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Now it is 13.6 mag (Nov. 23, Chris Wyatt). The brightness evolution is slower than originally predicted. It stays 13.5 mag until next summer. In the Northern Hemisphere, it stays observable in good condition until spring. In the Southern Hemisphere, it stays observable in good condition for a long time after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 3 52.80 3 26.4 1.693 2.580 147 13.5 22:08 ( 0, 58)
Dec. 24 3 42.69 0 10.3 1.716 2.532 137 13.5 21:31 ( 0, 55)
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It will brighten up to 13 mag in winter. But the condition is bad. It is not observable until February in the Southern Hemisphere, or until May in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 16 47.57 -23 9.0 2.580 1.627 11 13.9 5:31 (292, -8)
Dec. 24 17 9.98 -24 6.6 2.555 1.614 13 13.8 5:34 (294, -7)
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It brightened up to 9.3 mag in early summer (June 5, Chris Wyatt). Now it is fading. It has already faded down to 15.6 mag (Nov. 26, G. Duszanowicz, J. Camarasa). In the Southen Hemisphere, it stays observable in good condition for a long time. It became observable also in the Northern Hemisphere. But it stays locating low for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 10.05 -43 54.5 2.619 2.907 96 13.8 3:29 ( 0, 11)
Dec. 24 8 54.35 -43 29.8 2.590 2.969 102 13.9 2:46 ( 0, 11)
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Brightening very rapidly. Now it is 14.6 mag (Nov. 21, Katsumi Yoshimoto). It brightens up to 13 mag in January. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is not observable until February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 19 36.10 70 38.7 0.882 1.392 96 14.2 18:21 (157, 40)
Dec. 24 20 9.80 72 57.9 0.811 1.364 98 13.9 18:24 (160, 40)
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Now it is 14.5 mag (Nov. 25, Chris Wyatt). It stays 14 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 4 16.87 -24 1.0 2.878 3.578 128 14.3 22:31 ( 0, 31)
Dec. 24 3 59.95 -23 17.2 2.907 3.550 123 14.3 21:47 ( 0, 32)
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It brightened up to 10.4 mag from June to July (July 22, Ken-ichi Kadota). Now it is fading. Appearing in the morning sky in the Souther Hemisphere. However, now it is not detected, fainter than 17.5 mag (Nov. 29, Martin Masek). It will never be observable again in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 17 1.56 -63 33.7 3.008 2.350 40 14.5 5:31 (329,-30)
Dec. 24 17 34.15 -64 20.3 3.082 2.432 41 14.7 5:34 (330,-30)
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It will approach to Sun down to 0.1 a.u. on Jan. 31. In the Northern Hemisphere, it will appear in the morning sky at 9 mag in mid February, then it stays observable while the comet will be fading. In the Southern Hemisphere, it stays observable for a long time, although it is not observable from mid January to mid February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 19 14.00 -44 53.8 1.981 1.221 29 15.2 18:21 ( 44,-13)
Dec. 24 19 31.33 -43 55.8 1.872 1.087 26 14.5 18:24 ( 46,-14)
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Now it is 14.7 mag (Nov. 23, Chris Wyatt). It will be unobservable soon. But it will be observable at 15 mag again in 2023.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 20 29.44 -26 7.1 3.845 3.143 39 14.9 18:21 ( 47, 11)
Dec. 24 20 40.41 -25 25.0 3.911 3.152 34 14.9 18:24 ( 51, 8)
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Now it is 14.5 mag (Nov. 23, Chris Wyatt). It is expected to brighten up to 8 mag in 2023 July. It will be getting lower after this. And it will be unobservable in February. In the Southern Hemisphere, it will be observable in excellent condition at the high light. In the Northern Hemisphere, it becomes very low at the high lihght.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 0 52.89 -13 22.2 2.909 3.251 101 14.9 19:09 ( 0, 42)
Dec. 24 0 44.82 -13 38.2 2.978 3.181 92 14.9 18:33 ( 0, 41)
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Now it is 15.1 mag (Oct. 26, Thomas Lehmann). The brightness evolution is slower than originally expected. It stays 14-15 mag for a long time. Now it is not observable. It will be observable in early January in the Northern Hemisphere, or in early February in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 17 33.24 -14 52.2 4.064 3.094 8 15.0 5:31 (279,-13)
Dec. 24 17 38.19 -13 41.0 4.071 3.115 12 15.0 5:34 (282, -7)
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Now it is 15.1 mag (Nov. 25, Chris Wyatt). It stays observable in good condition at 15 mag from summer to winter. It locates somwwhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 8 6.06 20 38.5 1.614 2.488 145 15.2 2:26 ( 0, 76)
Dec. 24 8 2.72 21 13.7 1.586 2.505 153 15.2 1:55 ( 0, 76)
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Now it is 17.6 mag (Oct. 25, Michael Jager). Tiny comet, but it will approach to Sun down to 0.8 a.u. in January, and to Earth down to 0.6 a.u. in March. It will brighten up to 14 mag from January to March. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable now. It will become observable in early March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 20 44.32 -40 27.0 1.552 1.064 42 15.7 18:21 ( 35, 2)
Dec. 24 20 55.49 -43 29.2 1.524 0.992 39 15.4 18:24 ( 36, -3)
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Now it is 15.4 mag (Nov. 26, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a long time. But it will be fading after this, and it will be fainter than 18 mag in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 1 27.06 1 9.7 1.550 2.166 115 15.4 19:44 ( 0, 56)
Dec. 24 1 32.73 1 55.0 1.632 2.177 110 15.5 19:22 ( 0, 57)
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Now it is 15.8 mag (Nov. 21, Ken-ichi Kadota). It will brighten up to 13 mag from 2024 to 2025. It is observable in excllent condition in the Southern Hemisphere. It locates low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 14.47 -37 16.2 6.612 6.863 100 15.5 3:33 ( 0, 18)
Dec. 24 9 13.56 -37 52.1 6.511 6.829 104 15.4 3:05 ( 0, 17)
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Now it is 15.6 mag (Nov. 29, ATLAS Chile). It is expected to brighten up to 7 mag in early 2024. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays low in 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 5 54.82 -37 59.2 4.672 5.215 118 15.5 0:14 ( 0, 17)
Dec. 24 5 49.17 -38 21.4 4.614 5.150 118 15.4 23:37 ( 0, 17)
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Now it is 14.8 mag (Nov. 24, Purple Mountain Observatory, XuYi Station). It will be fading after this. But it stays observable in excellent condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 1 58.56 26 35.3 1.698 2.456 130 15.6 20:15 ( 0, 82)
Dec. 24 1 59.46 27 12.4 1.775 2.467 124 15.7 19:49 ( 0, 82)
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Now it is 14.9 mag (Nov. 25, Chris Wyatt). It was expected to brighten up to 13 mag in spring. But actually, it was fainter than originally expected. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it stays extremely low for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 2 55.15 -46 8.3 3.259 3.587 101 15.7 21:10 ( 0, 9)
Dec. 24 2 43.14 -43 43.7 3.348 3.619 98 15.8 20:31 ( 0, 12)
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Now it is 16.8 mag (Nov. 10, Ken-ichi Kadota). It will brighten rapidly up to 14 mag in spring. In the Southern Hemisphere, appearing in the morning sky. It will be observable in excellent condition in spring. In the Northern Hemisphere, it is observable in good condition in winter, but it becomes somewhat low in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 13 26.62 -2 36.9 2.721 2.452 63 15.9 5:31 (313, 41)
Dec. 24 13 35.95 -4 9.6 2.628 2.439 68 15.8 5:34 (320, 43)
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It brightened up to 12.7 mag in early 2022 (Feb. 27, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. Now it is not observable. It will be observable agin at 16 mag 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. 17 16 34.16 -23 47.4 3.378 2.437 14 15.8 5:31 (295, -6)
Dec. 24 16 48.85 -24 19.6 3.373 2.457 18 15.9 5:34 (297, -4)
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Now it is 15.8 mag (Nov. 29, J. L. Virlichie, P. Traverse, H. Roy, G. Houdin). It stays 16 mag and observable in good condition until spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 33.66 18 32.8 2.748 3.408 124 15.9 3:53 ( 0, 73)
Dec. 24 9 35.59 19 14.0 2.664 3.399 131 15.9 3:27 ( 0, 74)
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It brightened by 6 mag in outburst in early August up to 14.6 mag (Aug. 13, ATLAS-MLO, Mauna Loa). It is bright as 16.3 mag still now (Nov. 28, Catalina Sky Survey). It seems to stay 16 mag for a while. It stays observable in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 21 30.71 -8 43.2 2.055 1.740 57 16.0 18:21 ( 47, 34)
Dec. 24 21 49.42 -8 39.0 2.098 1.731 54 16.0 18:24 ( 50, 32)
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Now it is 16.3 mag (Nov. 24, ATLAS Chile). It will be observable at 16-17 mag in excellent condition from autumn to winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 4 8.85 -1 38.6 2.618 3.485 147 16.1 22:25 ( 0, 53)
Dec. 24 4 5.65 -1 40.1 2.668 3.489 141 16.2 21:54 ( 0, 53)
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It was observed at 15 mag from 2021 to 2022. Now it is fading. In the Southern Hemisphere, it stays observable in excellent condition for a long time, although it became extremely low temporarily in November. In the Northern Hemiphere, it is not observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 15 9.61 -57 15.9 6.559 5.879 43 16.3 5:31 (331,-15)
Dec. 24 15 12.70 -58 17.9 6.538 5.906 46 16.3 5:34 (335,-13)
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Now it is 17.3 mag (Nov. 26, ATLAS-HKO, Haleakala). It will brighten rapidly, and it will be observable at 16 mag in good condition in winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 10 2.84 14 5.4 1.188 1.854 116 16.5 4:22 ( 0, 69)
Dec. 24 10 9.37 14 14.8 1.140 1.864 122 16.4 4:01 ( 0, 69)
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Due to the DART spacecraft impact to its satellite Dimorphos on Sept. 26, the cometary activity was detected. It brightened up to 12.9 mag (Sept. 28, John Drummond). It is fading after that. It has already faded down to 15.9 mag (Oct. 29, Katsumi Yoshimoto). It stays observable in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 8 8.79 25 57.8 0.212 1.165 145 16.5 2:29 ( 0, 81)
Dec. 24 7 57.79 27 49.1 0.233 1.199 154 16.5 1:50 ( 0, 83)
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Now it is 17.7 mag (July 9, ATLAS Chile). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 13 55.82 -56 3.4 3.805 3.286 51 16.6 5:31 (338, -8)
Dec. 24 14 12.27 -58 4.5 3.756 3.275 53 16.5 5:34 (341, -8)
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Now it is 17.0 mag (Nov. 16, Ken-ichi Kadota). It is expected to brighten up to 12-13 mag from 2024 to 2025.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 10 29.86 -20 4.9 6.311 6.495 96 16.6 4:49 ( 0, 35)
Dec. 24 10 27.22 -20 6.2 6.154 6.451 103 16.5 4:19 ( 0, 35)
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Now it is 17.4 mag (Nov. 23, ATLAS-MLO, Mauna Loa). It stays observable in good condition after this. But it will be fading gradually after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 0 51.51 -0 34.3 2.420 2.865 106 16.8 19:08 ( 0, 55)
Dec. 24 0 55.03 0 2.5 2.556 2.905 100 17.1 18:44 ( 0, 55)
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Now it is 17.0 mag (Nov. 24, iTelescope Observatory, Siding Spring). Very far object. It stays 17 mag for a long time from 2021 to 2026. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 7 20.41 -75 53.7 10.601 10.466 79 16.9 1:39 ( 0,-21)
Dec. 24 7 6.00 -76 15.4 10.587 10.460 79 16.9 0:57 ( 0,-21)
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Now it is 17.0 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 16 mag for a long time from early 2023 to early 2024. In the Northern Hemisphere, it is observable only until 2023 spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 10 28.69 2 41.8 4.088 4.471 106 17.1 4:48 ( 0, 58)
Dec. 24 10 25.10 1 42.5 3.944 4.438 114 17.0 4:17 ( 0, 57)
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It brightened up to 15.3 mag in last winter (Jan. 12, H. Nohara). Now it is fading. It has already faded down to 17.8 mag (Nov. 25, ATLAS-MLO, Mauna Loa). It will be observable at 17 mag in good condition in next winter. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 10 25.07 20 51.2 3.952 4.443 113 17.1 4:44 ( 0, 76)
Dec. 24 10 25.91 21 32.9 3.875 4.460 120 17.1 4:17 ( 0, 76)
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It brightened very rapidly up to 15.5 mag from last autumn to last winter (Nov. 2, 2021, Toshihiko Ikemura, Hirohisa Sato). Now it is fading slowly. It has already faded down to 17.0 mag (Nov. 28, C. Rinner).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 6 35.61 9 36.7 3.495 4.434 160 17.1 0:55 ( 0, 65)
Dec. 24 6 31.71 9 28.5 3.497 4.454 164 17.1 0:24 ( 0, 64)
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Now it is 17.4 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in winter. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 6 15.25 26 22.7 2.948 3.922 170 17.2 0:35 ( 0, 81)
Dec. 24 6 10.44 26 24.2 2.940 3.923 176 17.2 0:03 ( 0, 81)
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Now it is 17.1 mag (Nov. 28, D. Buczynski). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 17 44.42 63 5.4 9.589 9.578 86 17.2 18:21 (149, 29)
Dec. 24 17 49.36 63 22.8 9.597 9.594 86 17.3 5:34 (211, 30)
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It stays 17 mag and observable in good condition for a long time until 2023 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 13 36.12 4 2.3 9.238 8.862 64 17.3 5:31 (305, 44)
Dec. 24 13 36.22 4 16.4 9.126 8.867 71 17.3 5:34 (313, 50)
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It brightened up to 14 mag in 2021. Now it is fading. It has already faded down to 16.9 mag (Nov. 21, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 23 17.40 15 18.4 6.518 6.620 91 17.3 18:21 ( 31, 68)
Dec. 24 23 18.73 15 29.3 6.667 6.659 85 17.4 18:24 ( 46, 64)
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Now it is 17.3 mag (Nov. 25, Toshihiko Ikemura, Hirohisa Sato). It continued brightening even after the perihelion passage. It will be fading after this, and it will be fainter than 18 mag in February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 23 10.70 -2 50.9 4.464 4.450 82 17.3 18:21 ( 21, 50)
Dec. 24 23 14.92 -2 29.7 4.584 4.464 76 17.4 18:24 ( 31, 48)
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Now it is 16.7 mag (Nov. 18, ATLAS-HKO, Haleakala). It will be fading after this, and it will be fainter than 18 mag in January.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 2 54.75 23 7.1 1.880 2.730 142 17.3 21:11 ( 0, 78)
Dec. 24 2 53.73 22 38.9 1.970 2.759 135 17.5 20:43 ( 0, 78)
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Now it is 17.2 mag (Nov. 26, ATLAS South Africa). Very large comet. It is expected to brighten up to 14 mag in 2031. In the Southern Hemisphere, it stays observable in good condition for a long time. 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. 17 2 32.31 -61 10.5 18.216 18.203 87 17.4 20:48 ( 0, -6)
Dec. 24 2 30.70 -61 0.1 18.238 18.178 84 17.4 20:19 ( 0, -6)
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Now it is 17.3 mag (Nov. 20, D. Buczynski). Fading slowly. In the Southern Hemisphere, it is not observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 17 11.14 39 6.9 6.209 5.825 62 17.5 5:31 (236, 21)
Dec. 24 17 19.09 39 39.4 6.218 5.856 64 17.5 5:34 (238, 26)
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It brightened up to 16.1 mag in autumn (Sept. 23, Michael Jager). Then it is fading very rapidly. It has already faded down to 17.9 mag (Oct. 28, Ken-ichi Kadota). It will be getting higher after this also in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 11 6.89 -2 40.9 1.472 1.851 95 17.5 5:26 ( 0, 52)
Dec. 24 11 12.19 -4 27.1 1.434 1.887 100 17.5 5:03 ( 0, 50)
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Now it is 16.2 mag (Nov. 21, Toshihiko Ikemura, Hirohisa Sato). It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It will be fainter than 18 mag soon. But it may stay bright for some more time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 0 7.85 -16 4.2 4.037 4.164 90 17.5 18:25 ( 0, 39)
Dec. 24 0 10.40 -15 16.2 4.158 4.181 84 17.6 18:24 ( 8, 40)
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Now it is 17.6 mag (Nov. 2, ATLAS-MLO, Mauna Loa). In the Northern Hemisphere, it stays observable at 17 mag in good condition for a long time until winter. In the Southern Hemisphere, it stays extremely low for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 8 15.26 50 46.3 2.243 3.055 138 17.5 2:35 (180, 74)
Dec. 24 8 11.41 50 59.9 2.238 3.085 143 17.6 2:04 (180, 74)
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Now it is 17.6 mag (Nov. 26, ATLAS-HKO, Haleakala). It stays 17 mag for a long time from 2023 to 2024. It is observable in good condition in the Northern Hemisphere. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 2 21.59 28 16.9 6.390 7.132 136 17.6 20:38 ( 0, 83)
Dec. 24 2 20.62 28 9.4 6.455 7.116 129 17.6 20:10 ( 0, 83)
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Now it is 17.0 mag (Nov. 26, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 7 58.61 19 18.1 0.806 1.716 146 17.6 2:19 ( 0, 74)
Dec. 24 7 46.53 19 32.7 0.829 1.776 156 17.6 1:39 ( 0, 74)
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It brightened up to 14.2 mag in 2021 summer (July 18, 2021, Taras Prystavski). Now it is fading. It has already faded down to 17.0 mag (Nov. 27, ATLAS Chile). In the Southern Hemisphere, it stays observable in good condition for a long time. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 1 14.91 -21 0.0 5.602 5.892 102 17.6 19:31 ( 0, 34)
Dec. 24 1 14.16 -20 3.2 5.747 5.935 96 17.7 19:03 ( 0, 35)
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Now it is 18.8 mag (Nov. 26, ATLAS-HKO, Haleakala). It brightens rapidly, and it is observable at 16.5 mag in good condition in spring. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 8 54.11 23 51.0 1.667 2.464 135 17.8 3:13 ( 0, 79)
Dec. 24 8 53.92 24 22.0 1.592 2.445 142 17.6 2:46 ( 0, 79)
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It brightened up to 12.3 mag from spring to summer in 2021 (June 15, 2021, Marco Goiato). Now it is fading. It has already faded down to 18.2 mag (Nov. 21, D. Buczynski). It will be fainter than 18 mag in January.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 12 44.67 33 39.9 6.197 6.272 89 17.8 5:31 (268, 71)
Dec. 24 12 44.19 34 39.9 6.137 6.318 96 17.8 5:34 (268, 77)
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Now it is 18.9 mag (Nov. 23, ATLAS-MLO, Mauna Loa). It is observable at 17.5 mag in good condition in winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 4.67 1 2.5 2.848 3.506 124 17.8 3:24 ( 0, 56)
Dec. 24 9 4.18 0 32.5 2.772 3.503 131 17.8 2:56 ( 0, 55)
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Now it is 18.5 mag (Nov. 28, ATLAS Chile). It brightens rapidly, and it is observable at 16.5 mag in good condition from January to March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 9 23.52 13 34.5 0.505 1.343 125 18.2 3:42 ( 0, 68)
Dec. 24 9 48.17 14 43.8 0.458 1.314 127 17.8 3:39 ( 0, 70)
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Now it is 18.9 mag (Nov. 24, Catalina Sky Survey). It brightens up to 17.5 mag from January to February. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 11 31.81 13 56.5 2.053 2.377 96 17.9 5:31 (347, 68)
Dec. 24 11 39.67 14 23.1 1.980 2.387 102 17.8 5:31 ( 0, 69)
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Brightened rapidly. It brightened up to 14.0 mag in early September (Sept. 2, Michael Jager). Now it is 16.0 mag (Sept. 26, Ken-ichi Kadota). It will be fading after this. In the Northern Hemisphere, it stays observable for a long time, although it became extremely low in November. It is not observable after this in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 15 18.03 27 28.0 2.192 1.916 60 17.9 5:31 (260, 38)
Dec. 24 15 16.30 29 53.2 2.124 1.968 67 18.0 5:34 (261, 45)
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Now it is 18.0 mag (Nov. 26, ATLAS-HKO, Haleakala). It will be fainter than 18 mag soon. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 17 0 26.16 17 53.5 5.291 5.672 107 17.9 18:43 ( 0, 73)
Dec. 24 0 22.86 17 9.3 5.434 5.689 100 18.0 18:24 ( 9, 72)
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