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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. 10 17 28.98 -56 37.5 2.531 1.801 34 7.9 18:18 ( 39,-29)
Dec. 17 17 49.08 -59 19.7 2.497 1.797 36 7.9 18:21 ( 36,-31)
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Now it is bright as 8.8 mag (Dec. 5, Katsumi Yoshimoto). 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. 10 15 53.05 25 42.2 1.579 1.239 51 8.9 5:26 (254, 23)
Dec. 17 15 53.59 26 46.5 1.423 1.194 55 8.5 5:31 (257, 30)
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Now it is 11.2 mag (Nov. 27, 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. 10 10 42.40 79 29.2 2.252 2.795 113 10.2 5:26 (180, 46)
Dec. 17 9 29.95 83 58.1 2.167 2.750 116 10.1 3:56 (180, 41)
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Now it is very bright as 10.4 mag (Nov. 23, Chris Wyatt). It stays 10 mag until November. 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. 10 19 31.19 -38 53.2 2.310 1.602 34 11.0 18:18 ( 43, -3)
Dec. 17 19 29.25 -38 34.7 2.410 1.613 28 11.1 18:21 ( 47, -7)
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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 11.8 mag still now (Nov. 26, Osamu Miyazaki).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 10 0.48 -26 34.0 4.472 4.636 93 11.2 4:47 ( 0, 28)
Dec. 17 9 59.76 -27 57.7 4.426 4.674 98 11.3 4:19 ( 0, 27)
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Now it is 11.2 mag (Nov. 25, Michael Jager). 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. 10 13 31.29 -7 48.0 1.974 1.599 53 11.5 5:26 (308, 31)
Dec. 17 13 50.70 -9 27.2 1.932 1.598 55 11.5 5:31 (312, 32)
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Brightening very rapidly. Now it is very bright as 11.4 mag (Nov. 25, Michael Jager). 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. 10 14 3.79 35 3.8 2.020 1.958 72 11.9 5:26 (255, 49)
Dec. 17 14 27.48 38 50.0 1.896 1.919 76 11.6 5:31 (250, 51)
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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. 10 18 2.58 -21 40.6 4.354 3.402 13 12.1 18:18 ( 68, -7)
Dec. 17 18 9.44 -22 49.7 4.347 3.374 7 12.1 18:21 ( 70,-12)
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Outburst occured in early October. Now it is very bright as 11.8 mag (Nov. 23, Chris Wyatt). It stays observable in good 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. 10 22 17.20 -21 31.0 1.736 1.696 71 12.4 18:18 ( 21, 31)
Dec. 17 22 35.70 -19 13.8 1.855 1.760 68 12.9 18:21 ( 24, 32)
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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. 10 14 45.84 -2 4.2 5.220 4.508 39 12.9 5:26 (289, 22)
Dec. 17 14 52.75 -1 42.2 5.166 4.528 45 12.9 5:31 (293, 27)
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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. In the Southern Hemisphere, it is not observable until mid December. But it will be observable in good condition in 2023.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 13 52.24 5 56.5 4.228 3.757 55 13.0 5:26 (292, 37)
Dec. 17 13 52.73 5 10.8 4.107 3.741 61 12.9 5:31 (299, 42)
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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. 10 8 39.68 7 26.4 1.068 1.834 126 13.1 3:26 ( 0, 62)
Dec. 17 8 43.03 7 35.4 1.024 1.839 132 13.0 3:02 ( 0, 62)
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It brightened in major outburst in late November. Now it is very bright as 11.3 mag (Nov. 27, Jose Guilherme de S. Aguiar).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 6 48.61 29 25.7 5.137 6.051 156 13.4 1:36 ( 0, 84)
Dec. 17 6 45.15 29 27.8 5.103 6.053 163 13.4 1:05 ( 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 2023 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. 10 4 3.91 6 54.9 1.690 2.630 158 13.6 22:47 ( 0, 62)
Dec. 17 3 52.80 3 26.4 1.693 2.580 147 13.5 22:08 ( 0, 58)
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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. 10 9 24.21 -43 58.9 2.654 2.845 90 13.7 4:11 ( 0, 11)
Dec. 17 9 10.05 -43 54.5 2.619 2.907 96 13.8 3:29 ( 0, 11)
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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. 10 16 25.72 -22 1.0 2.607 1.643 9 14.1 5:26 (290,-10)
Dec. 17 16 47.57 -23 9.0 2.580 1.627 11 13.9 5:31 (292, -8)
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Brightening very rapidly. Now it is 15.1 mag (Nov. 25, Ken-ichi Kadota). 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. 10 19 15.73 68 57.5 0.952 1.426 94 14.4 18:18 (155, 41)
Dec. 17 19 36.10 70 38.7 0.882 1.392 96 14.2 18:21 (157, 40)
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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. 10 16 29.15 -62 26.7 2.932 2.269 40 14.2 5:26 (328,-29)
Dec. 17 17 1.56 -63 33.7 3.008 2.350 40 14.5 5:31 (329,-30)
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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. 10 4 34.55 -24 25.6 2.871 3.606 132 14.4 23:16 ( 0, 31)
Dec. 17 4 16.87 -24 1.0 2.878 3.578 128 14.3 22:31 ( 0, 31)
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Now it is 14.7 mag (Nov. 23, Chris Wyatt). It stays observable at 13-14 mag for a while. It locates low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 20 18.55 -26 46.8 3.773 3.135 43 14.8 18:18 ( 44, 13)
Dec. 17 20 29.44 -26 7.1 3.845 3.143 39 14.9 18:21 ( 47, 11)
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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. In 2022, it stays observable in good condition while the comet will be brightening gradually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 1 2.35 -12 56.2 2.846 3.321 110 15.0 19:46 ( 0, 42)
Dec. 17 0 52.89 -13 22.2 2.909 3.251 101 14.9 19:09 ( 0, 42)
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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. 10 17 28.21 -16 1.5 4.045 3.074 8 15.0 18:18 ( 78,-10)
Dec. 17 17 33.24 -14 52.2 4.064 3.094 8 15.0 5:31 (279,-13)
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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. 10 8 8.08 20 8.0 1.652 2.472 137 15.2 2:55 ( 0, 75)
Dec. 17 8 6.06 20 38.5 1.614 2.488 145 15.2 2:26 ( 0, 76)
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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. 10 18 58.30 -45 41.3 2.073 1.347 32 15.8 18:18 ( 42,-12)
Dec. 17 19 14.00 -44 53.8 1.981 1.221 29 15.2 18:21 ( 44,-13)
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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. 10 1 22.49 0 31.6 1.473 2.156 121 15.3 20:07 ( 0, 56)
Dec. 17 1 27.06 1 9.7 1.550 2.166 115 15.4 19:44 ( 0, 56)
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Now it is 14.8 mag (Nov. 24, Purple Mountain Observatory, XuYi Station). It stays 15 mag and observable in excellent condition until December.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 1 59.23 25 58.2 1.627 2.446 137 15.4 20:43 ( 0, 81)
Dec. 17 1 58.56 26 35.3 1.698 2.456 130 15.6 20:15 ( 0, 82)
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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.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 9 14.86 -36 36.6 6.716 6.897 96 15.5 4:01 ( 0, 18)
Dec. 17 9 14.47 -37 16.2 6.612 6.863 100 15.5 3:33 ( 0, 18)
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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. 10 6 0.18 -37 27.2 4.740 5.279 118 15.6 0:47 ( 0, 18)
Dec. 17 5 54.82 -37 59.2 4.672 5.215 118 15.5 0:14 ( 0, 17)
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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. 10 3 9.83 -48 22.1 3.184 3.555 104 15.6 21:52 ( 0, 7)
Dec. 17 2 55.15 -46 8.3 3.259 3.587 101 15.7 21:10 ( 0, 9)
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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 observable only until early Decemebr. Then it will become observable again in early March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 20 34.76 -37 26.5 1.565 1.144 46 16.1 18:18 ( 34, 6)
Dec. 17 20 44.32 -40 27.0 1.552 1.064 42 15.7 18:21 ( 35, 2)
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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. 10 16 19.37 -23 10.0 3.378 2.417 10 15.7 5:26 (292, -9)
Dec. 17 16 34.16 -23 47.4 3.378 2.437 14 15.8 5:31 (295, -6)
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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. 10 9 30.89 17 58.1 2.840 3.418 118 15.9 4:18 ( 0, 73)
Dec. 17 9 33.66 18 32.8 2.748 3.408 124 15.9 3:53 ( 0, 73)
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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. 10 13 17.01 -1 3.6 2.812 2.466 59 16.0 5:26 (306, 38)
Dec. 17 13 26.62 -2 36.9 2.721 2.452 63 15.9 5:31 (313, 41)
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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 16.2 mag still now (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). 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. 10 21 12.32 -8 37.5 2.014 1.753 60 16.0 18:18 ( 44, 35)
Dec. 17 21 30.71 -8 43.2 2.055 1.740 57 16.0 18:21 ( 47, 34)
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Now it is 16.3 mag (Nov. 13, ATLAS South Africa). 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. 10 4 12.60 -1 28.8 2.579 3.482 152 16.1 22:56 ( 0, 54)
Dec. 17 4 8.85 -1 38.6 2.618 3.485 147 16.1 22:25 ( 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. 10 15 6.18 -56 17.2 6.572 5.852 39 16.3 5:26 (328,-17)
Dec. 17 15 9.61 -57 15.9 6.559 5.879 43 16.3 5:31 (331,-15)
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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. 10 8 17.18 23 45.3 0.194 1.133 136 16.5 3:04 ( 0, 79)
Dec. 17 8 8.79 25 57.8 0.212 1.165 145 16.5 2:29 ( 0, 81)
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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. 10 9 54.80 14 6.5 1.240 1.846 111 16.6 4:41 ( 0, 69)
Dec. 17 10 2.84 14 5.4 1.188 1.854 116 16.5 4:22 ( 0, 69)
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Now it is 14.8 mag (Nov. 19, W. Pei). 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. 10 0 48.83 -1 6.9 2.289 2.824 113 16.6 19:33 ( 0, 54)
Dec. 17 0 51.51 -0 34.3 2.420 2.865 106 16.8 19:08 ( 0, 55)
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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. 10 13 40.28 -54 0.6 3.853 3.297 49 16.6 5:26 (335, -7)
Dec. 17 13 55.82 -56 3.4 3.805 3.286 51 16.6 5:31 (338, -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. 10 10 31.87 -19 59.8 6.469 6.540 89 16.7 5:18 ( 0, 35)
Dec. 17 10 29.86 -20 4.9 6.311 6.495 96 16.6 4:49 ( 0, 35)
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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. 10 7 33.44 -75 24.7 10.615 10.472 79 16.9 2:19 ( 0,-20)
Dec. 17 7 20.41 -75 53.7 10.601 10.466 79 16.9 1:39 ( 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. 10 10 31.33 3 41.6 4.238 4.505 99 17.2 5:18 ( 0, 59)
Dec. 17 10 28.69 2 41.8 4.088 4.471 106 17.1 4:48 ( 0, 58)
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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. 10 10 23.48 20 14.4 4.035 4.426 107 17.1 5:10 ( 0, 75)
Dec. 17 10 25.07 20 51.2 3.952 4.443 113 17.1 4:44 ( 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 16.3 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 6 39.28 9 48.1 3.508 4.415 154 17.1 1:27 ( 0, 65)
Dec. 17 6 35.61 9 36.7 3.495 4.434 160 17.1 0:55 ( 0, 65)
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Now it is 16.8 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag until spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 21 3.92 -11 56.2 2.105 1.780 57 17.1 18:18 ( 44, 31)
Dec. 17 20 58.44 -11 9.1 2.221 1.748 49 17.2 18:21 ( 53, 26)
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Now it is 16.7 mag (Nov. 18, ATLAS-HKO, Haleakala). It will be observable at 16-17 mag in good condition from summer to autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 2 57.05 23 40.2 1.801 2.701 150 17.2 21:41 ( 0, 79)
Dec. 17 2 54.75 23 7.1 1.880 2.730 142 17.3 21:11 ( 0, 78)
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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. 10 23 16.53 15 10.2 6.368 6.581 98 17.2 18:18 ( 12, 70)
Dec. 17 23 17.40 15 18.4 6.518 6.620 91 17.3 18:21 ( 31, 68)
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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. 10 17 39.58 62 52.8 9.581 9.563 85 17.2 18:18 (148, 31)
Dec. 17 17 44.42 63 5.4 9.589 9.578 86 17.2 18:21 (149, 29)
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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. 10 6 19.82 26 19.8 2.970 3.921 162 17.3 1:07 ( 0, 81)
Dec. 17 6 15.25 26 22.7 2.948 3.922 170 17.2 0:35 ( 0, 81)
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Now it is 17.1 mag (Nov. 21, Toshihiko Ikemura, Hirohisa Sato). It continued brightening even after the perihelion passage. It stays observable at 16 mag in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 23 6.95 -3 8.7 4.342 4.436 88 17.2 18:18 ( 11, 51)
Dec. 17 23 10.70 -2 50.9 4.464 4.450 82 17.3 18:21 ( 21, 50)
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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. 10 13 35.72 3 51.0 9.344 8.858 57 17.3 5:26 (297, 39)
Dec. 17 13 36.12 4 2.3 9.238 8.862 64 17.3 5:31 (305, 44)
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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. 10 2 34.20 -61 18.7 18.194 18.228 90 17.4 21:17 ( 0, -6)
Dec. 17 2 32.31 -61 10.5 18.216 18.203 87 17.4 20:48 ( 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. 10 17 3.20 38 39.4 6.198 5.794 61 17.4 5:26 (234, 17)
Dec. 17 17 11.14 39 6.9 6.209 5.825 62 17.5 5:31 (236, 21)
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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. 10 0 5.94 -16 49.7 3.917 4.148 96 17.4 18:50 ( 0, 38)
Dec. 17 0 7.85 -16 4.2 4.037 4.164 90 17.5 18:25 ( 0, 39)
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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. 10 8 17.67 50 26.0 2.259 3.026 133 17.5 3:05 (180, 75)
Dec. 17 8 15.26 50 46.3 2.243 3.055 138 17.5 2:35 (180, 74)
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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. 10 11 0.10 -0 48.2 1.509 1.817 91 17.5 5:26 (351, 54)
Dec. 17 11 6.89 -2 40.9 1.472 1.851 95 17.5 5:26 ( 0, 52)
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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 16.9 mag (Nov. 18, Katsumi Yoshimoto). 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. 10 1 16.28 -21 55.0 5.462 5.848 108 17.5 20:00 ( 0, 33)
Dec. 17 1 14.91 -21 0.0 5.602 5.892 102 17.6 19:31 ( 0, 34)
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Now it is 17.5 mag (Nov. 12, ATLAS-MLO, Mauna Loa). 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. 10 2 23.00 28 24.9 6.336 7.147 143 17.6 21:07 ( 0, 84)
Dec. 17 2 21.59 28 16.9 6.390 7.132 136 17.6 20:38 ( 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. 10 8 9.24 19 6.8 0.792 1.656 137 17.7 2:57 ( 0, 74)
Dec. 17 7 58.61 19 18.1 0.806 1.716 146 17.6 2:19 ( 0, 74)
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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. 10 15 18.84 25 24.8 2.252 1.867 54 17.7 5:26 (259, 30)
Dec. 17 15 18.03 27 28.0 2.192 1.916 60 17.9 5:31 (260, 38)
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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. 10 12 44.56 32 45.1 6.259 6.225 83 17.7 5:26 (266, 64)
Dec. 17 12 44.67 33 39.9 6.197 6.272 89 17.8 5:31 (268, 71)
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Now it is 17.6 mag (Nov. 14, X. Gao, Q.-Z. Ye). 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. 10 0 30.30 18 43.0 5.154 5.655 116 17.8 19:14 ( 0, 74)
Dec. 17 0 26.16 17 53.5 5.291 5.672 107 17.9 18:43 ( 0, 73)
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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. 10 8 52.89 23 26.2 1.751 2.483 128 18.0 3:40 ( 0, 78)
Dec. 17 8 54.11 23 51.0 1.667 2.464 135 17.8 3:13 ( 0, 79)
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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. 10 9 4.30 1 37.4 2.931 3.510 118 17.9 3:51 ( 0, 57)
Dec. 17 9 4.67 1 2.5 2.848 3.506 124 17.8 3:24 ( 0, 56)
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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. 10 11 23.11 13 39.4 2.129 2.368 91 17.9 5:26 (333, 66)
Dec. 17 11 31.81 13 56.5 2.053 2.377 96 17.9 5:31 (347, 68)
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It brightened up to 8.8 mag from last winter to early spring (Jan. 31, Chris Wyatt). Now it is fading. Appearing in the morning sky. It will be fainter than 18 mag in December.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 14 12.08 11 9.2 3.712 3.241 54 17.9 5:26 (283, 36)
Dec. 17 14 19.14 10 53.2 3.678 3.285 59 18.0 5:31 (288, 41)
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Now it is 18.2 mag (Nov. 21, Toshihiko Ikemura, Hirohisa Sato). It stayed bright for a while even after the perihelion passage, but it will be fading after this. It will be fainter than 18 mag in winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 21 16.40 -3 36.2 7.825 7.437 63 17.9 18:18 ( 47, 40)
Dec. 17 21 18.04 -3 59.4 7.960 7.465 56 18.0 18:21 ( 54, 35)
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Now it is 17.7 mag (Nov. 18, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it is observable at 17-18 mag in excellent condition in autumn. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 10 8 32.85 69 17.7 2.263 2.935 124 17.9 3:21 (180, 56)
Dec. 17 8 29.61 71 58.9 2.287 2.971 125 18.0 2:50 (180, 53)
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