|
Now it is 9.9 mag (Dec. 1, Carlos Labordena). It is expected to brighten up to 8 mag in 2020. It stays observable in good condition for a long time in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 4 22.18 50 54.1 1.555 2.456 149 9.7 22:50 (180, 74)
Dec. 21 4 0.54 52 54.7 1.529 2.393 143 9.5 22:01 (180, 72)
|
|
Now it is 11.3 mag (Dec. 4, Maik Meyer). It stays bright as 11 mag until January. It stays observable in good condition for a long time in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 23 36.66 39 14.4 2.709 3.141 107 11.6 18:19 (149, 85)
Dec. 21 23 32.70 39 21.3 2.812 3.149 100 11.7 18:22 (119, 79)
|
|
Now it is 14.7 mag (Nov. 19, Chris Wyatt).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 0 25.36 12 55.4 5.382 5.782 109 13.4 18:55 ( 0, 68)
Dec. 21 0 26.29 12 51.3 5.490 5.783 102 13.4 18:28 ( 0, 68)
|
|
It brightened up to 8.3 mag in September (Sept. 20, Maik Meyer). Now it is fading. It has already faded down to 13.1 mag (Nov. 19, Chris Wyatt). In the Southern Hemisphere, it stays observable for a long time after this. 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. 14 21 45.38 -45 14.0 2.359 2.000 56 13.6 18:19 ( 21, 5)
Dec. 21 21 51.01 -45 39.1 2.512 2.063 52 13.9 18:22 ( 25, 3)
|
|
Now it is bright as 13.5 mag (Dec. 4, Chris Wyatt). It stays 14 mag until spring. It stays observable for a long time in the Southern Hemisphere. It is hardly observable in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 16 49.89 -85 58.8 3.777 3.441 62 14.0 5:29 (355,-35)
Dec. 21 19 57.05 -86 7.4 3.772 3.443 63 14.0 18:22 ( 4,-33)
|
|
It brightened up to 11.4 mag in autumn (Nov. 10, Carlos Labordena). It will fade out rapidly after this. It has already faded down to 13.2 mag (Dec. 5, Thomas Lehmann). It is observable in excellent condition in the Northern Hemisphere. It stays locating extremely low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 2 29.07 46 33.1 0.894 1.755 138 14.3 20:59 (180, 78)
Dec. 21 2 34.86 45 25.2 0.966 1.798 134 14.7 20:37 (180, 80)
|
|
Now it is 14.0 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 21 24.97 -13 40.0 2.151 1.829 57 14.4 18:19 ( 42, 31)
Dec. 21 21 43.46 -12 46.1 2.217 1.844 55 14.5 18:22 ( 45, 30)
|
|
Now it is 14.5 mag (Nov. 28, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it is observable at 14 mag in excellent condition in winter. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 2 21.44 32 52.5 0.732 1.611 139 14.5 20:51 ( 0, 88)
Dec. 21 2 29.05 30 2.4 0.748 1.598 134 14.4 20:31 ( 0, 85)
|
|
Now it is 15.4 mag (Dec. 4, Chris Wyatt). It is observable at 14.5 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. 14 10 48.32 12 18.4 1.342 1.829 102 14.6 5:20 ( 0, 67)
Dec. 21 10 59.11 11 56.9 1.297 1.844 107 14.5 5:03 ( 0, 67)
|
|
Now it is 14.2 mag (Dec. 2, Chris Wyatt). It will be fading slowly after this. In the Southern Hemisphere, it becomes low from February to March, but it stays observable for a long time. In the Northern Hemisphere, it is not observasble until summer in 2020.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 21 39.24 -66 2.5 3.708 3.303 58 14.8 18:19 ( 13,-14)
Dec. 21 21 50.69 -63 20.6 3.784 3.328 55 14.9 18:22 ( 16,-12)
|
|
Now it is 14.8 mag (Dec. 1, Toshihiko Ikemura, Hirohisa Sato). It stays at 14.5-15 mag until December. It is observable in good condition in the Southern Hemisphere. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 21 33.54 -9 56.9 2.045 1.791 61 14.9 18:19 ( 42, 35)
Dec. 21 21 49.35 -7 53.7 2.103 1.796 58 15.0 18:22 ( 47, 35)
|
|
In the Southern Hemisphere, it is observable at 14.5 mag from winter to spring. In the Northern Hemisphere, it is not observable until August when it fades down to 17 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 16 48.66 -62 43.1 2.801 2.142 39 15.0 5:29 (328,-30)
Dec. 21 17 12.04 -65 15.0 2.735 2.115 42 14.9 5:33 (331,-30)
|
|
Now it is 14.7 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). The orbit is extremely hyperbolic with e=3.35. It is the first interstellar comet in history. It stays 15 mag until January. In the Northern Hemisphere, it will be getting lower after this, and it will be unobservable in mid January. In the Southern Hemisphere, it will be getting higher gradually. Then it will be observable in excellent condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 11 37.34 -22 31.3 1.966 2.010 78 15.0 5:29 (349, 32)
Dec. 21 11 48.67 -27 53.8 1.944 2.026 80 15.0 5:33 (355, 27)
|
|
It brightened up to 7.7 mag in June in 2018 (June 19, Juan Jose Gonzalez). Now it is fading. It has already faded down to 15.1 mag (Nov. 6, Toshihiko Ikemura, Hirohisa Sato). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out. In the Northern Hemisphere, it stays low for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 6 20.20 -34 8.3 4.905 5.479 121 15.0 0:53 ( 0, 21)
Dec. 21 6 13.30 -33 40.1 4.941 5.535 122 15.1 0:18 ( 0, 21)
|
|
Now it is 15.7 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this. It will be fainter than 18 mag in April.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 9 40.06 5 41.4 2.227 2.799 115 15.1 4:12 ( 0, 61)
Dec. 21 9 39.65 5 27.3 2.175 2.831 122 15.2 3:44 ( 0, 60)
|
|
Now it is 14.7 mag (Nov. 19, Chris Wyatt). In the Southern Hemisphere, it is observable for a long time. It stays low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 22 56.51 -28 22.2 4.932 4.753 73 15.5 18:19 ( 13, 26)
Dec. 21 22 59.19 -26 59.1 5.064 4.786 68 15.6 18:22 ( 20, 25)
|
|
Now it is 17.2 mag (Nov. 28, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13.5-14 mag from 2020 to 2021. It stays observable in good condition for a long time after this until 2020 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 12 46.28 11 54.7 3.706 3.599 76 16.1 5:29 (306, 56)
Dec. 21 12 52.29 11 43.4 3.591 3.581 81 16.0 5:33 (316, 60)
|
|
Now it is 16.0 mag (Nov. 28, Toshihiko Ikemura, Hirohisa Sato). It stays 15-16 mag until December, and it is observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 0 6.48 -5 44.5 2.015 2.359 97 16.0 18:36 ( 0, 49)
Dec. 21 0 14.01 -4 41.0 2.090 2.353 92 16.1 18:22 ( 2, 50)
|
|
It will be fading slowly after this. In the Southern Hemisphere, it stays observable in good condition for a long time, although it becomes low from October to November. It will never be observable after this in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 14 27.52 -57 55.5 5.077 4.460 46 16.0 5:29 (334,-13)
Dec. 21 14 30.07 -59 26.0 5.064 4.502 50 16.1 5:33 (338,-12)
|
|
Now it is 16.7 mag (Nov. 1, Ken-ichi Kadota). It will brighten up to 10.5 mag from 2020 December to 2021 January. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually, but it is not observable at the high light. In the Southern Hemisphere, it is not observable for a long time, but it will be observable in good condition after the high light.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 17 27.92 60 58.6 4.413 4.422 84 16.2 18:19 (147, 28)
Dec. 21 17 35.95 60 36.4 4.348 4.359 84 16.1 5:33 (214, 29)
|
|
Now it is 17.4 mag (Dec. 4, Toshihiko Ikemura, Hirohisa Sato). It stays 16-17 mag for a long time until 2020. It is observable in good condition in the Northern Hemisphere. It is hardly observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 13 20.13 51 59.2 8.530 8.618 91 16.8 5:29 (225, 60)
Dec. 21 13 23.27 52 12.3 8.472 8.626 95 16.8 5:33 (221, 63)
|
|
It will brighten up to 13 mag in 2021. In 2020, it is observable at 15 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 14 39.73 -10 6.5 6.692 5.983 40 16.9 5:29 (300, 21)
Dec. 21 14 43.49 -10 44.4 6.567 5.939 46 16.8 5:33 (305, 25)
|
|
Now it is 16.0 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It stays bright even after the perihelion passage. It will fade out rapidly after this, and it will be fainter than 18 mag in January. However, it may stay bright for some more time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 3 8.86 -1 48.6 2.047 2.864 138 16.9 21:38 ( 0, 53)
Dec. 21 3 8.45 -1 28.2 2.159 2.918 132 17.2 21:10 ( 0, 54)
|
|
Fading. Now it is 17.6 mag (Nov. 28, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag from autumn to winter. 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. 14 9 0.33 23 43.5 5.983 6.663 130 16.9 3:33 ( 0, 79)
Dec. 21 8 55.09 23 46.6 5.937 6.707 138 17.0 3:00 ( 0, 79)
|
|
Now it is 16.5 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). 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. 14 1 26.90 -6 17.3 2.129 2.701 115 17.0 19:55 ( 0, 49)
Dec. 21 1 14.95 -7 13.4 2.303 2.734 105 17.2 19:16 ( 0, 48)
|
|
Now it is 17.3 mag (Nov. 30, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 12 mag in winter in 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 22 8.31 41 34.7 7.153 7.261 92 17.4 18:19 (116, 69)
Dec. 21 22 11.32 41 12.5 7.184 7.216 87 17.4 18:22 (114, 64)
|
|
Now it is 17.3 mag (Nov. 29, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. 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. 14 1 6.38 31 37.0 3.878 4.494 123 17.5 19:35 ( 0, 87)
Dec. 21 1 2.10 29 50.9 4.023 4.536 115 17.6 19:04 ( 0, 85)
|
|
Now it is 17.4 mag (Oct. 31, Ken-ichi Kadota). It is observable at 17-18 mag for a long time from late 2019 to early 2021. It will fade out before it passes the perihelion.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 2 57.32 0 49.4 4.343 5.120 138 17.5 21:26 ( 0, 56)
Dec. 21 2 54.99 1 2.7 4.403 5.106 131 17.5 20:56 ( 0, 56)
|
|
Fading now. Now it is 17.1 mag (Oct. 5, M. Masek). In the Southern Hemisphere, it stays observable for a long time until it fades out. In the Northern Hemisphere, it will not be observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 5 23.95 -55 43.3 5.328 5.602 101 17.6 23:51 ( 0, -1)
Dec. 21 5 12.35 -55 56.1 5.397 5.654 100 17.7 23:12 ( 0, -1)
|
|
Now it is 17.1 mag (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and it will be fainter than 18 mag in late December.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 3 5.53 24 56.5 1.526 2.422 148 17.7 21:34 ( 0, 80)
Dec. 21 3 4.09 24 20.6 1.603 2.450 141 18.0 21:06 ( 0, 79)
|
|
Asteroid moving along a comet-like orbit. Now it is 16.9 mag (Dec. 3, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17.5 mag from 2020 to 2021. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 10 56.47 -23 39.0 6.638 6.650 86 17.8 5:28 ( 0, 31)
Dec. 21 10 58.07 -24 4.7 6.532 6.643 92 17.8 5:02 ( 0, 31)
|
|
Now it is 17.2 mag (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17-18 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. 14 4 5.31 23 39.4 2.278 3.230 162 17.8 22:34 ( 0, 79)
Dec. 21 4 1.34 23 21.5 2.310 3.225 154 17.8 22:02 ( 0, 78)
|
|
It brighted rapidly from 20.5 mag up to 18.5 mag in September. However, the brightness evolution has stopped since October. Now it is very faint as 18.9 mag (Nov. 21, Katsumi Yoshimoto). It will approaches to Earth down to 0.09 a.u. in early January, and it will brighten up to 15.5 mag. It will be obesrvable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it will not be observable at the high light.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 22 45.07 -7 43.7 0.207 0.964 78 18.2 18:19 ( 23, 45)
Dec. 21 22 56.13 -0 34.1 0.169 0.959 76 17.9 18:22 ( 34, 50)
|
|
Now it is 17.3 mag (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). It was exptected to brighten up to 16.5 mag from October to December. But actually, it is fainter than originally expected. It seems to brighten up to 17-18 mag at best. 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. 14 10 10.44 37 45.8 0.973 1.676 117 17.9 4:42 (180, 87)
Dec. 21 10 22.96 41 9.6 0.958 1.697 121 18.0 4:27 (180, 84)
|
|
Now it is very faint as 19.7 mag (Oct. 25, Toshihiko Ikemura, Hirohisa Sato). It brightened up to 15.5 mag in 1997, and 17 mag in 2008, however, it is much fainter in this apparition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Dec. 14 1 7.04 12 33.0 2.797 3.382 118 20.5 19:36 ( 0, 68)
Dec. 21 1 9.34 12 17.5 2.896 3.390 112 20.6 19:11 ( 0, 67)
|
|