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It brightened rapidly in outburst up to 6.9 mag (July 19, Maik Meyer). It is fading after that. Now it is 9.3 mag (Aug. 2, Katsumi Yoshimoto). It approaches to Sun down to 0.2 a.u. in August, and it was expected to brighten up to 3 mag. However, it must have been already disintegrated. Now it is not observable. In the Northern Hemisphere, it will appear in the morning sky in late October. But it will be too faint to observe.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 9 44.18 1 29.1 1.070 0.222 11 3.6 5:12 (276,-10)
Aug. 25 10 28.45 3 48.9 1.355 0.380 7 6.5 19:00 ( 87,-11)
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Now it is very bright as 7.3 mag (Aug. 19, Maik Meyer). It will 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 that.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 3 1.59 63 25.4 0.474 1.066 83 7.6 5:12 (180, -9)
Aug. 25 4 9.32 57 19.4 0.435 1.039 81 7.2 5:04 (187, -3)
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It brightened up to 7.7 mag in June (June 19, Juan Jose Gonzalez). Now it is fading. But it is still bright as 9.0 mag (Aug. 15, Marco Goiato). It stays bright as 9-10 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 not observable for a long time until autumn in 2019 when the comet fades out down to 16 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 14 45.18 -57 21.3 1.917 2.212 92 9.1 18:55 ( 32, 60)
Aug. 25 14 35.87 -57 46.6 2.032 2.217 86 9.2 19:00 ( 36, 55)
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It brightened up to 8.7 mag in July (July 18, Marco Goiato). Now it is fading. But it is still bright as 10.2 mag (Aug. 14, Chris Wyatt). In the Southern Hemisphere, it is observable until September, but it locates in extremely low. In the Northern Hemisphere, it is not observable until late December.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 10 6.63 -29 10.1 1.465 0.995 42 9.8 18:55 ( 61, 10)
Aug. 25 10 52.62 -30 29.7 1.569 1.069 42 10.3 19:00 ( 62, 14)
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It approached to Earth down to 0.3 a.u., and brightened up to 8.3 mag in July (July 22, Juan Jose Gonzalez). Now it is fading. But it is still bright as 10.4 mag (Aug. 14, Chris Wyatt). It will go away from Earth after this, and will fade out rapidly. It stays observable in good condition until September. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 15 31.54 -13 58.3 0.875 1.329 89 10.9 18:55 (139, 63)
Aug. 25 15 18.93 -11 31.1 1.112 1.352 78 11.5 19:00 (125, 55)
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Now it is 10.4 mag (Aug. 14, 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)
Aug. 18 10 15.24 51 53.0 3.524 2.810 38 11.6 18:55 (135,-30)
Aug. 25 10 37.06 51 21.4 3.528 2.839 40 11.7 19:00 (133,-32)
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Now it is 11.7 mag (June 12, Juan Jose Gonzalez). It will appear in the morning sky soon in the Northern Hemisphere, or in late September in the Southern Hemisphere. It stays 12 mag for a long time until spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 8 45.41 23 29.3 3.633 2.689 18 12.3 5:12 (249,-11)
Aug. 25 8 49.00 21 41.5 3.600 2.698 23 12.3 5:04 (248, -7)
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Now it is 12.9 mag (Aug. 18, Paul Camilleri). 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)
Aug. 18 4 10.80 5 17.5 1.737 1.906 83 12.7 5:12 (207, 46)
Aug. 25 4 26.88 6 16.9 1.640 1.861 85 12.3 5:04 (205, 45)
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Now it is bright as 12.6 mag (Aug. 18, Chris Wyatt). It stays at 12-13 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)
Aug. 18 22 40.84 -24 48.6 1.015 2.005 163 12.6 0:58 (180, 80)
Aug. 25 22 38.17 -26 5.6 1.016 2.007 163 12.6 0:27 (180, 81)
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It brightened in outburst on Aug. 14. Now it is bright as 13.0 mag (Aug. 15, Chris Wyatt). 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)
Aug. 18 0 8.14 15 11.2 0.790 1.669 135 13.3 2:24 (180, 40)
Aug. 25 0 13.23 17 46.6 0.723 1.626 138 13.0 2:02 (180, 37)
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Now it is 14.1 mag (Aug. 18, Chris Wyatt).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 23 11.38 1 23.6 4.843 5.775 154 13.1 1:28 (180, 53)
Aug. 25 23 8.50 1 13.9 4.805 5.774 161 13.1 0:58 (180, 54)
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It brightened rapidly, and brightened up to 10.2 mag from May to June (May 22, Chris Wyatt). Now it is fading. It has already faded down to 13.8 mag (Aug. 15, Chris Wyatt). It stays observable in good condition for a long time after this. But it will be fainter than 18 mag in October.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 1 19.25 -14 46.7 0.920 1.744 128 14.1 3:35 (180, 70)
Aug. 25 1 12.25 -14 7.2 0.929 1.802 136 14.5 3:01 (180, 69)
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Now it is 12.8 mag (July 13, 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. It becomes extremely low in September also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 11 45.10 39 36.8 4.820 4.055 36 14.1 18:55 (131,-11)
Aug. 25 11 46.34 38 42.4 4.871 4.079 34 14.2 19:00 (127,-15)
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Now it is 13.9 mag (Aug. 11, Paul Camilleri). It stays at 14-15 mag for a long time from summer to winter. In the Southern Hemisphere, it stays observable in excellent condition for a while. But it will be getting lower rapidly in September, then it becomes unobservable after October. In the Northern Hemisphere, it stays observable for a long time until it fades out. But it stays extremely low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 14 19.41 -13 28.4 2.273 2.189 72 14.2 18:55 (115, 52)
Aug. 25 14 27.68 -11 43.8 2.319 2.136 66 14.1 19:00 (112, 46)
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Now it is bright as 13.7 mag (Aug. 15, Chris Wyatt). It stays observable in good condition for a long time after this. But it will be fading gradually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 23 37.04 5 56.0 0.975 1.905 146 14.1 1:54 (180, 49)
Aug. 25 23 31.38 6 19.4 0.979 1.940 154 14.3 1:21 (180, 49)
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Now it is 14.1 mag (Aug. 11, Paul Camilleri). It stays 13-14 mag until summer in 2019. In the Northern Hemisphere, it stays observable in good condition for a while. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 16 26.93 26 45.5 3.371 3.561 92 14.2 18:55 (176, 28)
Aug. 25 16 22.93 23 59.6 3.431 3.535 87 14.2 19:00 (166, 30)
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It brightened rapidly as predicted, and brightened up to 11.1 mag (July 13, Chris Wyatt). Now it is fading. But it is still bright as 13.6 mag (Aug. 18, Chris Wyatt). In the Southern Hemisphere, it stays observable in good condition all through this apparition. It becomes observable also in the Northern Hemisphere, but it stays low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 2 43.30 -34 54.2 0.317 1.163 110 14.7 5:00 (180, 90)
Aug. 25 2 5.56 -33 54.5 0.350 1.236 122 15.6 3:55 (180, 89)
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Now it is 14.9 mag (Aug. 8, Toshihiko Ikemura, Hirohisa Sato). It stays at 13 mag for a long time from winter to autumn in 2019. It stays observable in good condition until winter when the comet brightens up to 13 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 21 43.73 -4 2.7 1.669 2.673 170 14.9 0:01 (180, 59)
Aug. 25 21 38.40 -4 36.4 1.642 2.641 169 14.7 23:23 (180, 60)
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The condition is worst in this apparition. It brightens up to 14.5 mag from June to August, but it is not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 8 38.99 17 46.2 2.413 1.477 17 14.8 5:12 (253, -7)
Aug. 25 9 1.27 17 16.2 2.420 1.498 18 14.9 5:04 (254, -7)
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Now it is 17.6 mag (Aug. 5, Toshihiko Ikemura, Hirohisa Sato). It will approach to Earth down to 0.08 a.u. in December, and it is expected to brighten up to 3 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it is observable in good condition until mid December when it brightens up to 3 mag. But it becomes unobservable after that.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 1 17.17 -15 45.5 0.965 1.788 129 15.4 3:33 (180, 71)
Aug. 25 1 24.97 -16 52.0 0.870 1.728 133 14.8 3:13 (180, 72)
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Now it is 15.1 mag (June 18, Martin Masek). 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)
Aug. 18 12 47.12 -64 17.7 4.154 4.183 84 15.0 18:55 ( 31, 45)
Aug. 25 12 58.94 -64 31.7 4.189 4.163 81 15.0 19:00 ( 31, 42)
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Now it is 16.3 mag (Jan. 11, ATLAS-HKO, Haleakala). It will brighten up to 14 mag in winter. It will be observable in excellent condition in the Northern Hemisphere. In the Southern Hemisphere, it is observable only until August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 4 22.53 38 33.6 2.079 2.066 75 15.2 5:12 (197, 14)
Aug. 25 4 37.67 41 32.7 1.992 2.044 78 15.1 5:04 (195, 11)
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Now it is 16.9 mag (Aug. 18, Toshihiko Ikemura, Hirohisa Sato). It is observable at 15-16 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)
Aug. 18 23 22.59 -18 9.3 2.307 3.262 156 15.2 1:39 (180, 73)
Aug. 25 23 18.28 -18 41.5 2.297 3.276 162 15.3 1:07 (180, 74)
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Now it is 15.9 mag (July 14, iTelescope Observatory, Siding Spring). It will brighten up to 12 mag in autumn in 2019. It stays observable in good condition for a while in the Southern Hemisphere. In the Northern Hemisphere, it stays extremely low for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 3 12.46 -43 33.8 4.535 4.904 105 15.7 5:12 (341, 81)
Aug. 25 3 10.18 -44 12.6 4.432 4.856 109 15.6 4:58 ( 0, 81)
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Now it is 16.8 mag (Aug. 5, Toshihiko Ikemura, Hirohisa Sato). Fading now. It stays observable in good condition for a long time after this in the Southern Hemisphere. It stays low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 0 30.85 -26 41.0 3.898 4.716 139 15.7 2:47 (180, 82)
Aug. 25 0 22.78 -28 40.6 3.876 4.740 145 15.7 2:12 (180, 83)
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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 15.0 mag (July 15, 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)
Aug. 18 2 7.25 -51 14.3 4.620 5.146 116 15.7 4:23 ( 0, 74)
Aug. 25 2 4.58 -52 4.2 4.653 5.208 118 15.8 3:53 ( 0, 73)
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Now it is 17.0 mag (July 15, Toshihiko Ikemura, Hirohisa Sato). It brightens up to 16 mag from August to October. But it stays low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 13 26.43 -0 18.7 1.843 1.523 55 16.3 18:55 (116, 33)
Aug. 25 13 45.70 -2 16.4 1.871 1.520 54 16.2 19:00 (112, 32)
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Now it is around the apheilon. But it brightened up to 15.8 mag in outburst (July 21, Hidetaka Sato). Now it is getting diffused. But it is bright as 16.2 mag still now (Aug. 18, Toshihiko Ikemura, Hirohisa Sato).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 21 8.02 -13 5.5 3.636 4.637 170 16.3 23:21 (180, 68)
Aug. 25 21 4.25 -13 25.7 3.662 4.637 162 16.5 22:49 (180, 68)
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Now it is 16.2 mag (June 17, Jean-Francois Soulier). It stays 16 mag for a while. In the Southern Hemisphere, it stays observable until August, but it will be unobservable after that. In the Northern Hemisphere, it becomes observable in good condition after this. 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)
Aug. 18 2 58.45 36 42.1 1.421 1.770 91 16.4 5:12 (181, 18)
Aug. 25 3 1.25 39 41.0 1.410 1.827 96 16.4 4:50 (180, 15)
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Now it is 16.0 mag (Aug. 12, Gabor Santa). It will be observable at 16.5 mag in good condition from August to September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 21 36.64 -4 48.5 1.205 2.210 171 16.5 23:49 (180, 60)
Aug. 25 21 32.23 -5 9.1 1.182 2.181 168 16.5 23:17 (180, 60)
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It brightened up to 14.7 mag in early 2018 (Jan. 25, Catalina Sky Survey). Now it is fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time until the comet fades out. It is never observable again in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 8 1.61 50 2.6 6.388 5.686 42 16.5 5:12 (221,-18)
Aug. 25 8 5.84 50 44.4 6.335 5.704 47 16.6 5:04 (219,-17)
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It will be observable at 16 mag in good condition from autumn to winter. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 6 6.11 30 20.8 2.823 2.370 53 16.7 5:12 (220, 11)
Aug. 25 6 21.00 30 16.4 2.755 2.365 57 16.7 5:04 (220, 12)
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It brightened rapidly. Now it is 16.1 mag (Aug. 5, Toshihiko Ikemura, Hirohisa Sato). It will be fading after this, and will be fainter than 18 mag in September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 15 38.23 -13 15.3 1.907 2.169 90 16.7 18:55 (143, 64)
Aug. 25 15 48.55 -15 52.0 2.016 2.207 86 16.9 19:00 (130, 63)
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Now it is 16.8 mag (Aug. 8, Toshihiko Ikemura, Hirohisa Sato). It is expected to brighten up to 7-8 mag in 2020. In 2018, it will be observable at 15-16 mag in good condition from autum to winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 4 1.15 -3 48.8 6.764 6.800 87 17.0 5:12 (209, 55)
Aug. 25 4 2.06 -3 57.1 6.602 6.743 93 16.9 5:04 (202, 57)
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Now it is 17.3 mag (Feb. 20, Toshihiko Ikemura, Hirohisa Sato). It stays 17 mag in 2018.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 5 5.17 5 6.4 7.725 7.443 70 17.2 5:12 (224, 40)
Aug. 25 5 7.63 4 53.2 7.657 7.476 75 17.2 5:04 (219, 42)
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Now it is 16.9 mag (Aug. 19, 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)
Aug. 18 23 34.69 77 40.7 7.475 7.504 87 17.2 1:51 (180,-23)
Aug. 25 23 27.84 77 50.2 7.451 7.530 90 17.2 1:17 (180,-23)
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Now it is 17.8 mag (Aug. 8, Toshihiko Ikemura, Hirohisa Sato). It was observed at 16 mag from summer to autumn in 2017. It will be observable at 17 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)
Aug. 18 1 12.05 28 27.4 2.866 3.425 115 17.2 3:28 (180, 26)
Aug. 25 1 11.23 29 4.1 2.830 3.467 121 17.2 3:00 (180, 26)
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First return of a new periodic comet which brightened up to 16.5 mag in 2005. Now it is 19.1 mag (June 14, E. Schwab, D. Abreu). It will be observable at 17 mag in good condition in autumn. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 1 34.62 31 58.5 1.515 2.084 109 17.6 3:51 (180, 23)
Aug. 25 1 41.79 33 7.8 1.451 2.077 113 17.5 3:30 (180, 22)
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Now it is 17.4 mag (Aug. 9, Ken-ichi Kadota). It is not observable after this in the Southern Hemisphere. It is observable in good condition in the Northern Hemisphere. But it will be fainter than 18 mag in September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 4 11.53 51 52.9 1.271 1.421 76 17.5 5:12 (191, 2)
Aug. 25 4 37.15 55 45.2 1.294 1.463 77 17.7 5:04 (191, -2)
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First return of a new periodic comet which brightened up to 17 mag in 2008. It was predicted to brighten up to 18 mag in autumn. But actually, it is much fainter than predicted, fainter than 21.5 mag (June 22, Erwin Schwab).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 23 17.76 -0 19.3 2.884 3.821 154 17.8 1:34 (180, 55)
Aug. 25 23 13.97 -0 26.6 2.847 3.820 161 17.8 1:03 (180, 55)
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Now it is 17.7 mag (Aug. 8, Toshihiko Ikemura, Hirohisa Sato). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. It will be observable in good condition for a long time in the Southern Hemisphere. In the Northern Hemisphere, it is not observable at the highlight from 2022 summer to 2023 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Aug. 18 17 10.62 59 20.7 13.380 13.395 88 17.9 19:23 (180, -4)
Aug. 25 17 9.28 58 48.2 13.355 13.352 87 17.9 19:00 (179, -4)
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First return of a new periodic comet which brightened up to 17.5 mag in 2010. Now it is 19.0 mag (Aug. 10, Erwin Schwab). It is expected to brighten up to 16.5 mag from November to December. It is observable in excellent 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)
Aug. 18 4 13.04 18 51.8 1.941 2.028 79 18.0 5:12 (202, 33)
Aug. 25 4 26.82 19 54.4 1.861 2.012 83 17.9 5:04 (200, 33)
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