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Now it is 11.2 mag (Mar. 20, Juan Jose Gonzalez). It stays bright as 11 mag for a long time. In the Southern Hemisphere, it is not observable for a long time after this. In the Northern Hemispehre, it stays observable for a long time until the comet fades out. But it will be getting lower gradually after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 4 28.11 37 8.9 2.948 2.636 62 10.9 19:45 (111, 44)
Apr. 7 4 37.00 38 38.6 3.017 2.625 57 10.9 19:52 (114, 40)
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Now it is bright as 11.3 mag (Mar. 24, Marco Goiato). It is expected to brighten up to 9 mag in summer. In the Southern Hemisphere, it stays observable in good condition for a long time until the comet will fade out. In the Northern Hemisphere, it is observable only until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 19 34.55 -2 33.5 2.737 2.672 75 11.5 4:23 (307, 37)
Apr. 7 19 37.91 -3 42.1 2.583 2.630 81 11.3 4:12 (311, 38)
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Now it is 12.0 mag (Mar. 20, Juan Jose Gonzalez). It stays 12 mag for a long time until spring in 2019. In the Northern Hemisphere, it stays observable in good condition for a long time, although it becomes unobservable temporarily from mid June to August. In the Southern Hemisphere, it is not observable until September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 8 41.55 74 53.3 2.658 2.903 93 12.1 20:06 (180, 50)
Apr. 7 8 14.83 71 17.5 2.705 2.875 89 12.1 19:52 (175, 54)
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It brightened up to 9-10 mag from December to February. Now it is fading very rapidly. It has already faded down to 16.1 mag (Mar. 28, Martin Masek). In the Northern Hemisphere, it stays extremely low after this. In the Southern Hemisphere, it will be getting higher in the morning sky after this, then it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 21 52.92 -10 18.7 1.435 0.983 43 12.7 4:23 (287, 7)
Apr. 7 21 59.25 -15 3.8 1.417 1.094 50 13.1 4:12 (293, 6)
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Now it is very bright as 12.8 mag (Mar. 12, Seiichi Yoshida). It will be observable at 12-13 mag for a long time from 2017 to 2018. In the Southern Hemisphere, it will be hardly observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 15 36.71 50 37.6 3.239 3.746 113 12.9 3:05 (180, 75)
Apr. 7 15 17.92 52 50.4 3.234 3.753 113 12.9 2:19 (180, 72)
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Now it is 17.0 mag (Mar. 25, B. Lutkenhoner). It will brighten rapidly after this, and will brighten up to 12 mag from April to June. In the Southern Hemisphere, it stays observable in excellent condition. In the Northern Hemisphere, it will be unobservable from April to June when the comet becomes brightest.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 18 56.18 -37 43.5 1.070 1.446 88 13.6 4:23 (336, 12)
Apr. 7 19 32.08 -39 2.2 1.016 1.407 88 13.2 4:12 (333, 9)
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It brightened up to 11 mag in February. Now it is fading. But it is bright as 13.2 mag still now (Mar. 18, Chris Wyatt). It stays observable in the evening sky until the comet fades out.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 4 20.72 10 15.7 1.546 1.286 55 13.8 19:45 ( 81, 31)
Apr. 7 4 49.12 11 1.2 1.622 1.350 56 14.4 19:52 ( 82, 30)
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Appearing in the morning sky. Now it is a bit brighter, 15.7 mag (Apr. 3, Jean-Francois Soulier).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 22 41.55 -4 50.8 6.631 5.789 30 13.8 4:23 (276, 0)
Apr. 7 22 46.34 -4 15.6 6.572 5.788 35 13.8 4:12 (277, 3)
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Now it is 15.1 mag (Mar. 16, Kunihiro Shima). It will brighten up to 9 mag in summer. However, it is hardly observable when it is bright. In the Northern Hemisphere, it will be unobservable soon. Then it is not observable until late December. In the Southern Hemisphere, it is observable from July to September, but it locates in extremely low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 1 30.75 35 15.1 2.776 2.022 33 14.3 19:45 (126, 11)
Apr. 7 1 44.95 33 59.0 2.742 1.930 29 14.0 19:52 (127, 7)
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The condition of this apparition is worst. It brightens up to 12.5 mag from April to May. But it is not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 23 23.72 -1 5.9 1.696 0.818 18 15.2 4:23 (267, -6)
Apr. 7 0 2.01 1 47.7 1.651 0.740 15 14.3 4:12 (261, -9)
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Now it is 15.4 mag (Apr. 3, Jean-Francois Soulier). It will be observable at 14 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 20 14.69 -26 41.6 1.688 1.645 70 14.5 4:23 (316, 12)
Apr. 7 20 35.47 -25 18.3 1.632 1.632 72 14.3 4:12 (314, 13)
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It brightened up to 7.1 mag from May to June in 2017 (June 21, Juan Jose Gonzalez). Now it is fading. It has already faded down to 15.2 mag (Mar. 4, B. Lutkenhoner). In the Southern Hemisphere, it stays observable for a long time after this. It will never be observable again in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 0 12.70 -44 38.4 4.447 3.864 48 14.5 4:23 (303,-37)
Apr. 7 0 23.76 -44 8.7 4.474 3.930 51 14.6 4:12 (303,-35)
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It brightened up to 9.2 mag from November to December (Nov. 16, Juan Jose Gonzalez). Now it is fading rapidly. It has already faded down to 16.5 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition until summer when it fades out.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 14 16.80 4 59.8 1.044 1.988 153 14.5 1:45 ( 0, 60)
Apr. 7 14 9.48 5 21.6 1.068 2.036 159 14.9 1:11 ( 0, 60)
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It brightened up to 12.7 mag in winter (Jan. 6, Thomas Lehmann). Now it is fading. It has already faded down to 15.0 mag (Mar. 22, Toshihiko Ikemura, Hirohisa Sato). It will be getting lower gradually after this in the evening sky. It will be unobservable in May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 3 47.15 8 22.0 2.809 2.258 47 14.8 19:45 ( 84, 23)
Apr. 7 3 58.01 10 57.0 2.916 2.297 43 15.0 19:52 ( 90, 20)
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Now it is 17.1 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly after this, and it will brighten up to 11 mag from summer to autumn. It is observable in excellent 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)
Mar. 31 20 7.29 -17 15.5 2.400 2.258 69 15.6 4:23 (311, 21)
Apr. 7 20 20.55 -16 55.5 2.303 2.234 73 15.3 4:12 (311, 22)
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Now it is 15.7 mag (Mar. 16, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 13-14 mag from 2018 to 2019. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low until summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 19 39.33 41 26.6 4.380 4.245 75 15.5 4:23 (246, 57)
Apr. 7 19 37.96 42 10.1 4.281 4.205 78 15.4 4:12 (245, 61)
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Now it is 16.2 mag (Mar. 17, S. G. McAndrew). It stays 15 mag from 2018 to 2019, and it will be observable for a long time in the Southern Hemisphere. In the Northern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 13 44.92 -65 18.6 4.181 4.726 117 15.6 1:14 ( 0,-10)
Apr. 7 13 34.69 -66 16.5 4.111 4.693 120 15.5 0:37 ( 0,-11)
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Now it is 16.2 mag (Mar. 11, Toshihiko Ikemura, Hirohisa Sato). It stays 16 mag for a long time from 2017 to 2018. It is observable in excellent condition in the Northern Hemisphere. It locates very low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 7 10.15 44 8.3 5.263 5.412 93 15.8 19:45 (130, 74)
Apr. 7 7 7.65 44 20.2 5.392 5.421 86 15.9 19:52 (123, 68)
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Appearing in the morning sky in the Southern Hemisphere. It is observable at 15 mag in good condition in 2018. It is not observable until May in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 21 58.29 -19 58.7 3.636 3.024 45 15.9 4:23 (294, 0)
Apr. 7 22 8.34 -19 19.0 3.577 3.033 50 15.9 4:12 (295, 1)
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Now it is 16.1 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading slowly until summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 11 31.15 12 54.9 2.605 3.544 156 16.0 22:56 ( 0, 68)
Apr. 7 11 27.50 13 7.3 2.648 3.545 149 16.0 22:25 ( 0, 68)
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Appearing in the morning sky. It is fading now. But it stays 16 mag until summer. But actually, it is 18.1 mag (Mar. 23, Toshihiko Ikemura, Hirohisa Sato), fainter than this ephemeris.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 19 13.74 -23 27.0 3.465 3.489 83 16.0 4:23 (325, 23)
Apr. 7 19 8.22 -23 59.5 3.364 3.532 91 16.0 4:12 (331, 25)
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It will brighten up to 16 mag in spring. In the Southern Hemisphere, it stays observable until August, but it will be unobservable after that. In the Northern Hemisphere, it stays unobservable until June, but it will be observable in good condition after that. Its cometary activity was observed on Mar. 26 (M. Mommert, D. Polishook, N. Moskovitz).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 22 0.14 -38 37.0 1.605 1.331 55 16.2 4:23 (309,-12)
Apr. 7 22 28.61 -35 13.7 1.578 1.302 55 16.1 4:12 (305,-12)
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It brightened up to 8.1 mag in autumn (Oct. 3, Juan Jose Gonzalez). Now it is fading rapidly. It has already faded down to 17.9 mag (Mar. 11, Toshihiko Ikemura, Hirohisa Sato). In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it will never be observable again after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 7 46.44 65 36.0 2.403 2.658 93 16.5 19:45 (174, 59)
Apr. 7 8 0.98 63 25.7 2.527 2.727 90 16.8 19:52 (168, 61)
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Now it is 18.6 mag (Mar. 13, Toshihiko Ikemura, Hirohisa Sato). It will brighten rapidly, and brighten up to 7 mag from August to September. In the Northern Hemisphere, it will be observable in excellent condition. In the Southern Hemisphere, it will be unobservable from July to August. But it will be observable in good condition before and after tha.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 18 54.51 7 56.3 2.101 2.247 85 16.8 4:23 (308, 52)
Apr. 7 19 5.21 9 58.7 1.976 2.185 88 16.5 4:12 (307, 54)
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Now it is 16.2 mag (Mar. 12, 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)
Mar. 31 10 19.05 7 51.8 8.799 9.622 143 16.5 21:44 ( 0, 63)
Apr. 7 10 18.21 8 8.6 8.876 9.627 136 16.5 21:16 ( 0, 63)
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It is expected to approach to Sun down to 0.2 a.u. and brighten up to 3 mag in August. Now it is 17.5 mag (Mar. 24, D. Buczynski). In the Northern Hemisphere, it stays observable in the morning sky until early August when the comet brightens up to 6 mag. It is not observable at all in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 22 47.47 52 7.7 3.223 2.745 53 16.9 4:23 (224, 28)
Apr. 7 23 1.59 52 31.3 3.139 2.645 52 16.7 4:12 (224, 29)
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Now it is 16.4 mag (Mar. 14, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this. In the Northern Hemisphere, it stays observable in the northern sky for a long time. It is not observable at all after this in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 22 46.48 81 37.9 3.762 3.698 78 16.7 4:23 (190, 35)
Apr. 7 23 27.34 83 47.4 3.813 3.730 77 16.8 4:12 (187, 34)
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Now it is 17.0 mag (Mar. 13, Toshihiko Ikemura, Hirohisa Sato). It is observable at 17 mag in good condition in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 13 0.98 -12 52.3 1.557 2.545 169 17.0 0:30 ( 0, 42)
Apr. 7 12 56.97 -12 18.8 1.543 2.541 174 16.8 23:54 ( 0, 43)
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Now it is 16.8 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15 mag in January, 2019. It stays observable in excellent condition in the Northern Hemispehre. It is observable only until June in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 11 43.69 28 0.9 3.359 4.221 145 16.9 23:08 ( 0, 83)
Apr. 7 11 32.47 29 33.5 3.385 4.182 137 16.9 22:29 ( 0, 85)
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Now it is 16.5 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It has not been brightening well since the discovery in 2010. It is observable in good conditioin in the Northern Hemisphere. It is not observable for a long time in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 5 54.64 73 30.3 8.732 8.671 83 16.9 19:45 (166, 48)
Apr. 7 6 1.24 73 7.8 8.792 8.662 79 16.9 19:52 (163, 46)
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Now it is 16.7 mag (Mar. 17, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this, and it will be fainter than 18 mag in autumn. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 22 3.76 64 35.1 7.371 7.033 66 17.0 4:23 (211, 37)
Apr. 7 22 14.11 65 17.9 7.409 7.054 65 17.0 4:12 (211, 37)
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Now it is 17.3 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and it will be fainter than 18 mag in July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 12 0.10 21 12.0 4.693 5.603 153 17.0 23:24 ( 0, 76)
Apr. 7 11 53.72 22 22.4 4.766 5.628 146 17.0 22:50 ( 0, 77)
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Now it is 16.8 mag (Mar. 15, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it is observable at 17 mag in good condition. It will be too low to observe in June. In the Northern Hemisphere, it locates extremely low only in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 5 12.91 -35 15.4 2.784 2.711 75 17.0 19:45 ( 37, 8)
Apr. 7 5 25.73 -32 19.8 2.813 2.707 73 17.0 19:52 ( 42, 7)
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It brightened up to 9.7 mag in November (Nov. 16, Juan Jose Gonzalez). Now it is fading rapidly. It has already faded down to 16.6 mag (Mar. 22, W. Hasubick).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 16 51.44 -12 52.5 1.363 2.018 116 17.0 4:19 ( 0, 42)
Apr. 7 16 49.66 -13 3.5 1.347 2.077 123 17.4 3:50 ( 0, 42)
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It brightened up to 15.7 mag in February (Feb. 11, Catalina Sky Survey). Now it is fading rapidly. It has already faded down to 16.9 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in late April.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 13 22.98 22 41.9 0.504 1.460 151 17.2 0:52 ( 0, 78)
Apr. 7 13 20.20 21 13.5 0.530 1.489 151 17.4 0:21 ( 0, 76)
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Now it is 16.4 mag (Mar. 13, Toshihiko Ikemura, Hirohisa Sato). It will be fainter than 18 mag in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 14 59.99 -14 53.6 5.463 6.290 143 17.2 2:28 ( 0, 40)
Apr. 7 14 57.48 -14 0.2 5.415 6.307 150 17.2 1:58 ( 0, 41)
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Now it is 17.7 mag (Mar. 25, D. Buczynski). It stays observable at 17-18 mag in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 15 19.21 -5 58.2 1.794 2.635 139 17.2 2:48 ( 0, 49)
Apr. 7 15 15.66 -5 28.0 1.776 2.670 146 17.3 2:17 ( 0, 49)
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Now it is 17.1 mag (Mar. 12, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 10 58.62 39 25.0 7.509 8.200 131 17.3 22:23 (180, 86)
Apr. 7 10 53.98 39 1.9 7.598 8.220 125 17.4 21:51 (180, 86)
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Now it is 19.7 mag (Mar. 24, Toshihiko Ikemura, Hirohisa Sato). It was predicted to be observable at 17.5 mag in good condition from spring to summer. But recently, it is fainter than predicted.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 16 37.88 -8 52.9 3.289 3.886 119 17.9 4:06 ( 0, 46)
Apr. 7 16 37.79 -8 41.4 3.204 3.884 126 17.8 3:38 ( 0, 46)
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Now it is 17.9 mag (Mar. 16, ATLAS-HKO, Haleakala). It stays 18 mag from 2018 to 2020. It is observable in good condition in the Southern Hemisphere. It locates extremely low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 12 47.50 -38 18.4 3.672 4.532 145 17.9 0:16 ( 0, 17)
Apr. 7 12 42.22 -38 17.8 3.647 4.527 148 17.9 23:39 ( 0, 17)
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Now it is 17.2 mag (Mar. 22, Kunihiro Shima). It is observable at 18 mag in good condition in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 12 33.62 -4 28.8 1.276 2.274 179 18.0 0:02 ( 0, 50)
Apr. 7 12 29.36 -3 19.1 1.258 2.253 171 17.9 23:26 ( 0, 52)
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It has passed the perihelion on Jan. 23, and it approached to the Sun down to 0.1 a.u. Now it is 19.1 mag (Mar. 24, Steward Observatory, Mt. Lemmon Station). It is observable at 19.5 mag in good condition in March.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Mar. 31 12 29.54 -7 53.1 0.553 1.551 175 19.7 23:51 ( 0, 47)
Apr. 7 12 3.40 -4 12.8 0.666 1.653 165 20.5 22:59 ( 0, 51)
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