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Now it is bright as 9.0 mag (May 16, Juan Jose Gonzalez). It stays bright as 9 mag for a while. 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)
May 19 19 33.09 -16 41.4 1.678 2.408 125 9.9 3:48 (180, 72)
May 26 19 25.19 -20 34.2 1.555 2.378 134 9.7 3:13 (180, 75)
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It brightened rapidly as expected. Now it is very bright as 10.5 mag (May 9, Chris Wyatt). It stays at 10-11 mag until 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)
May 19 23 7.25 -34 49.0 0.896 1.290 84 10.1 5:22 (278, 66)
May 26 23 34.16 -32 41.2 0.899 1.293 84 10.2 5:26 (273, 66)
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Now it is 11.3 mag (May 15, Juan Jose Gonzalez). It stays bright as 11 mag for a long time until autumn. 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 stays very low until autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 5 51.70 46 37.1 3.329 2.604 37 11.1 18:30 (140,-11)
May 26 6 7.62 47 43.6 3.363 2.608 35 11.1 18:27 (140,-13)
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Now it is 14.4 mag (Apr. 8, Alexander Baransky). It will brighten up to 9 mag in summer. However, it is hardly observable when it is bright. In the Northern Hemisphere, 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)
May 19 3 15.80 24 52.8 2.365 1.371 7 12.2 5:22 (250,-16)
May 26 3 32.53 22 46.2 2.271 1.280 8 11.9 5:26 (250,-12)
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Now it is 11.6 mag (May 15, 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)
May 19 7 50.89 51 8.3 3.150 2.743 57 12.1 18:30 (158, -2)
May 26 7 53.86 48 22.9 3.231 2.727 52 12.1 18:27 (154, -1)
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It brightened very rapidly. Now it is very bright as 11.8 mag (May 16, Juan Jose Gonzalez). It may fade out very rapidly in June. In the Northern Hemisphere, it stays observable until it fades out. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 6 22.50 84 51.4 1.656 1.558 66 12.5 18:30 (175,-32)
May 26 5 45.64 84 24.6 1.710 1.558 63 12.5 18:27 (174,-33)
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Now it is bright as 11.5 mag (May 16, Juan Jose Gonzalez). It will be observable at 12-13 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 22.95 -14 15.6 1.345 1.617 85 13.1 5:22 (224, 63)
May 26 22 37.37 -12 12.3 1.304 1.625 88 13.0 5:26 (214, 64)
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Now it is very bright as 12.0 mag (May 15, Juan Jose Gonzalez). 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)
May 19 13 0.44 56 1.6 3.554 3.812 97 13.1 21:11 (180, -1)
May 26 12 42.71 55 1.7 3.652 3.826 92 13.2 20:26 (180, 0)
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Now it is 14.8 mag (Apr. 26, Catalina Sky Survey). 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)
May 19 21 34.05 -15 7.4 1.739 2.113 96 13.4 5:22 (199, 69)
May 26 21 44.83 -15 0.2 1.652 2.097 101 13.2 5:26 (184, 70)
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Appearing in the morning sky. Now it is 14.8 mag (May 10, Toshihiko Ikemura, Hirohisa Sato).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 23 9.97 -1 2.6 6.055 5.783 69 13.6 5:22 (227, 46)
May 26 23 12.80 -0 35.4 5.950 5.782 75 13.6 5:26 (218, 49)
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Now it is 14.9 mag (May 9, Thomas Lehmann). 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)
May 19 20 8.82 26 38.2 1.320 1.803 100 14.0 4:23 (180, 28)
May 26 20 19.70 30 7.8 1.230 1.738 101 13.6 4:06 (180, 25)
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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)
May 19 4 27.46 16 55.9 1.672 0.708 11 13.9 18:30 (106, -7)
May 26 5 9.41 17 52.9 1.721 0.781 14 14.8 18:27 (109, -4)
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First return of a new periodic comet which brightened up to 13 mag in 2013. Now it is 16.3 mag (May 14, Toshihiko Ikemura, Hirohisa Sato). It will brighten very rapidly after this, up to 11 mag in summer. In the Southern Hemisphere, it stays observable in good condition all through this apparition. In the Northern Hemisphere, it is not observable at the high light from mid June to mid August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 8 47.09 26 18.6 0.623 0.986 69 15.3 18:30 (158, 25)
May 26 8 52.10 23 12.0 0.576 0.927 64 14.5 18:27 (152, 26)
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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 16.4 mag (May 17, Toshihiko Ikemura, Hirohisa Sato). 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)
May 19 0 34.73 56 5.8 2.494 2.005 50 15.0 5:22 (207,-11)
May 26 0 52.90 56 48.8 2.362 1.890 50 14.6 5:26 (205,-11)
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Now it is 14.8 mag (May 14, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 13 mag in 2019 spring. 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)
May 19 19 1.30 46 17.1 3.671 3.976 100 14.8 3:16 (180, 9)
May 26 18 49.66 46 34.8 3.581 3.940 103 14.7 2:37 (180, 8)
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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 14.6 mag (May 14, Thomas Lehmann). 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)
May 19 1 20.50 -43 0.9 4.551 4.321 70 15.0 5:22 (299, 41)
May 26 1 28.27 -43 9.9 4.553 4.386 74 15.1 5:26 (298, 46)
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Now it is 15.5 mag (Apr. 25, J. Drummond). 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)
May 19 12 22.47 -67 48.6 3.882 4.510 122 15.2 20:34 ( 0, 57)
May 26 12 13.72 -67 27.6 3.874 4.481 121 15.2 19:58 ( 0, 57)
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Appearing in the morning sky. It is observable at 15 mag in 2018, 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)
May 19 22 59.53 -16 4.6 3.143 3.096 78 15.7 5:22 (240, 58)
May 26 23 6.22 -15 43.9 3.062 3.107 83 15.7 5:26 (231, 62)
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It brightened rapidly. Now it is 15.8 mag (May 14, Toshihiko Ikemura, Hirohisa Sato). It stays 15.5 mag until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 14 50.69 34 12.2 1.203 1.964 124 15.7 23:02 (180, 21)
May 26 14 47.10 31 10.3 1.202 1.959 124 15.7 22:31 (180, 24)
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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)
May 19 18 1.63 -27 34.3 2.914 3.803 147 15.9 2:18 (180, 83)
May 26 17 45.46 -27 57.7 2.896 3.850 157 15.9 1:34 (180, 83)
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Fading now. It stays observable in good condition for a long time after this in the Southern Hemisphere. It is not observable until June in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 0 55.30 -8 15.3 5.038 4.450 49 16.0 5:22 (257, 31)
May 26 0 57.23 -8 58.1 4.953 4.467 56 16.0 5:26 (252, 38)
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Now it is 15.5 mag (Mar. 16, iTelescope Observatory, Siding 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)
May 19 0 35.82 -10 43.5 1.516 1.249 54 16.0 5:22 (256, 37)
May 26 0 51.90 -6 31.4 1.513 1.263 55 16.0 5:26 (249, 37)
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Now it is 16.4 mag (May 10, 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)
May 19 7 9.74 45 17.3 6.088 5.487 49 16.2 18:30 (149, -1)
May 26 7 12.26 45 28.2 6.178 5.500 44 16.3 18:27 (146, -3)
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Now it is 15.9 mag (May 4, Kunihiro Shima). It will be fading slowly until summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 11 21.32 12 10.7 3.107 3.559 108 16.4 19:34 (180, 43)
May 26 11 23.17 11 42.2 3.204 3.561 102 16.5 19:08 (180, 43)
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It was observed at 16 mag from summer to autumn in 2017. It will be observable at 16.5 mag in good condition also in 2018. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 0 7.58 13 10.0 3.471 2.952 51 16.4 5:22 (230, 26)
May 26 0 16.23 14 39.2 3.433 2.982 55 16.4 5:26 (224, 28)
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It has not been observed yet in this apparition. It will brighten rapidly, and it is expected to brighten up to 10 mag in autumn. It will be observable in excellent condition in the Northern Hemisphere. It stays low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 19.38 -9 3.3 2.201 2.330 84 16.7 5:22 (217, 59)
May 26 22 29.31 -7 40.8 2.069 2.276 88 16.4 5:26 (206, 60)
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Unexpectedly, it brightened rapidly. Now it is 16.6 mag (May 15, Toshihiko Ikemura, Hirohisa Sato). It stays at 16.5 mag until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 12 20.08 1 35.5 1.382 2.141 126 16.5 20:32 (180, 53)
May 26 12 22.98 1 46.2 1.430 2.126 120 16.5 20:08 (180, 53)
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It brightened up to 15-16 mag in winter. Appearing in the morning sky. It stays observable at 16.5 mag for a while. It will be observable in good condition after this in the Southern Hemisphere. But it stays low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 22 40.96 -11 22.2 1.784 1.896 80 16.5 5:22 (228, 58)
May 26 22 31.47 -14 29.8 1.662 1.951 90 16.5 5:26 (213, 66)
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Now it is 16.9 mag (May 15, 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)
May 19 14 38.84 -8 27.1 5.449 6.414 161 16.8 22:50 (180, 63)
May 26 14 36.00 -7 36.7 5.510 6.433 153 16.8 22:20 (180, 63)
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Now it is 16.6 mag (May 10, 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)
May 19 10 19.15 9 12.8 9.507 9.658 95 16.8 18:32 (180, 46)
May 26 10 20.35 9 16.7 9.627 9.664 89 16.8 18:27 (172, 46)
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Now it is 16.8 mag (May 15, Toshihiko Ikemura, Hirohisa Sato). It will be fading gradually after this, and it will be fainter than 18 mag in winter. 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)
May 19 23 9.66 69 51.0 7.573 7.189 64 16.9 5:22 (191,-17)
May 26 23 17.38 70 37.2 7.587 7.212 64 16.9 5:26 (188,-17)
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Now it is 16.7 mag (May 10, 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)
May 19 10 40.21 34 25.8 3.823 3.960 90 16.9 18:52 (180, 21)
May 26 10 35.26 34 41.1 3.915 3.925 83 16.9 18:27 (178, 20)
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Now it is 16.7 mag (May 13, Hidetaka Sato). It will brighten rapidly after this, and it is expected to brighten up to 9 mag from autumn to winter. In the Northern Hemisphere, it stays observable in good condition for a long time until it fades out. In the Southern Hemispehre, it is observable in good condition until autumn, but it will be low in winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 1 11.11 -8 24.9 3.212 2.621 46 17.5 5:22 (260, 28)
May 26 1 23.19 -7 18.2 3.096 2.562 49 17.2 5:26 (255, 32)
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Now it is 18.0 mag (May 15, Toshihiko Ikemura, Hirohisa Sato). It stays observable at 17 mag in good condition from spring to autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 20 59.79 0 16.2 5.735 5.990 99 17.2 5:14 (180, 55)
May 26 21 1.08 0 40.8 5.634 5.990 105 17.2 4:48 (180, 54)
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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 18.5 mag (May 15, Toshihiko Ikemura, Hirohisa Sato).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 13 33.76 3 56.1 1.453 2.325 140 17.3 21:45 (180, 51)
May 26 13 31.89 3 11.3 1.552 2.374 134 17.7 21:16 (180, 52)
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Now it is 17.8 mag (May 15, 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)
May 19 11 25.78 26 39.5 5.475 5.780 102 17.4 19:38 (180, 28)
May 26 11 23.38 26 58.8 5.619 5.807 95 17.5 19:08 (180, 28)
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Now it is 17.3 mag (May 15, 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)
May 19 10 36.69 35 36.1 8.296 8.343 89 17.6 18:49 (180, 20)
May 26 10 35.64 34 55.0 8.425 8.365 83 17.7 18:27 (179, 20)
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Now it is 16.6 mag (May 15, 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)
May 19 12 43.11 -9 3.0 1.710 2.534 135 17.7 20:55 (180, 64)
May 26 12 44.27 -8 48.4 1.772 2.536 129 17.8 20:29 (180, 64)
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Now it is 17.7 mag (May 4, Kunihiro Shima). 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)
May 19 14 43.03 -3 26.5 1.922 2.886 158 17.9 22:54 (180, 59)
May 26 14 38.49 -3 26.6 1.991 2.922 151 18.0 22:22 (180, 59)
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Now it is 17.8 mag (Apr. 6, J. Drummond). 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)
May 19 12 17.98 -36 4.1 3.753 4.500 132 17.9 20:30 ( 0, 89)
May 26 12 16.44 -35 32.5 3.809 4.496 127 17.9 20:01 ( 0, 89)
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Now it is bright as 18.0 mag (May 14, Hidetaka Sato). Hidetaka Sato pointed out its cometary activity. In the Northern Hemisphere, it stays observable at 18 mag until June. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 19 7 18.98 37 17.6 1.902 1.475 50 18.0 18:30 (146, 7)
May 26 7 31.33 40 12.4 1.956 1.460 46 17.9 18:27 (146, 3)
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