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Now it is 7.5 mag (June 2, Marco Goiato). It was expected to brighten up to 6-7 mag from April to July. But it is fainter than predicted recently. In the Northern Hemisphere, it stays observable in excellent condition until June. In the Southern Hemisphere, it becomes observable in good condition after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 14 29.67 12 51.3 0.816 1.637 126 6.7 21:13 (180, 43)
June 17 14 21.44 5 2.0 0.841 1.638 123 6.8 20:38 (180, 51)
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Outburst occured on Apr. 4, and it brightened by 2 mag, up to 6.2 mag (Apr. 7, Juan Jose Gonzalez). It is very bright as 8.6 mag still now (June 3, Marco Goiato). It stays observable for a long time after this. But it locates low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 1 28.53 14 35.5 1.436 1.163 53 7.9 5:33 (225, 27)
June 17 1 49.65 16 25.3 1.482 1.218 54 8.2 5:36 (222, 27)
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Now it is bright as 10.8 mag (June 3, Marco Goiato). It is observable in excellent 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)
June 10 16 31.66 -29 21.2 0.590 1.598 168 10.4 23:15 (180, 85)
June 17 16 29.04 -30 58.2 0.593 1.591 162 10.4 22:45 (180, 86)
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It approached to Earth down to 0.14 a.u. from late March to early April, and it brightened up to 6.0 mag (Apr. 7, Juan Jose Gonzalez). Now it is fading. But it is bright as 9.5 mag still now (May 29, Chris Wyatt). It is observable in excellent condition in the Northern Hemisphere. It is observable in good condition after this also in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 18 24.67 8 48.7 0.334 1.299 143 11.4 1:12 (180, 46)
June 17 18 20.30 4 28.8 0.372 1.353 150 12.2 0:40 (180, 50)
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It has not been observed yet in this apparition. The condition of this apparition is worst. It will brighten up to 10 mag in spring, but not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 5 45.16 17 18.3 2.257 1.267 9 11.6 18:25 (105, -8)
June 17 6 10.97 16 48.4 2.309 1.318 9 12.0 18:25 (104, -9)
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Now it is 14.0 mag (May 19, Kunihiro Shima). It will brighten rapidly, and it is expected to brighten up to 12 mag from July to September. In the Southern Hemisphere, it stays at the same altitude in the morning sky. In the Northern Hemisphere, it will be getting higher slowly.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 1 25.23 2 12.9 1.521 1.320 58 13.2 5:33 (233, 37)
June 17 1 52.30 3 52.6 1.487 1.292 58 12.9 5:36 (231, 37)
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Outburst occured on Apr. 23. It is bright as 13.3 mag still now (May 29, Chris Wyatt).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 21 42.24 -13 24.5 5.326 5.839 115 13.4 4:29 (180, 68)
June 17 21 41.80 -13 20.6 5.229 5.838 122 13.3 4:01 (180, 68)
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Now it is 14.3 mag (June 4, T. Ikemura, H. Sato). It will brighten up to 12-13 mag and will be observable in good condition in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 0 15.13 15 53.0 3.030 2.844 69 13.9 5:33 (206, 35)
June 17 0 10.47 15 57.3 2.867 2.823 77 13.7 5:36 (196, 37)
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Now it is 14.7 mag (Feb. 20, Thomas Lehmann). It is not observable now in the Northern Hemisphere. It will be unobservable temporarily in May also in the Southern Hemisphere. It will be getting higher gradually in the morning sky after summer. Then it will be observable at 11 mag for a long time from 2017 autumn to 2018 winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 4 13.64 -9 11.8 5.041 4.253 35 13.8 5:33 (273, 12)
June 17 4 20.28 -8 27.0 4.962 4.202 37 13.7 5:36 (269, 16)
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Now it is 13.7 mag (May 26, Chris Wyatt). It will brighten up to 14 mag from spring to summer. It locates somewhat low in the Northern Hemisphere. The perihelion distance increased from 2.4 a.u. to 2.9 a.u. in this apparition. So it will not be bright as before.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 15 56.08 -21 42.2 1.997 2.980 162 14.0 22:40 (180, 77)
June 17 15 51.48 -21 48.7 2.023 2.973 154 14.0 22:08 (180, 77)
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It brightened up to 11 mag from March to April. Now it is fading. But it is bright as 12.7 mag still now (May 26, iTelescope Observatory, Siding Spring). It is not observable now in the Northern Hemisphere. In the Southern Hemisphere, it stays observable for a long time, but it stays low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 2 27.59 6 55.2 1.949 1.387 42 14.1 5:33 (243, 23)
June 17 2 44.49 7 24.7 1.999 1.474 45 14.5 5:36 (240, 25)
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Now it is 15.6 mag (June 4, T. Ikemura, H. Sato). In the Northern Hemisphere, it will brighten up to 14 mag from summer to winter, and it will be observable in excellent condition. In the Southern Hemisphere, it will be observable in the very low sky only from May to June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 0 34.09 33 53.0 3.707 3.336 61 14.6 5:33 (203, 17)
June 17 0 37.32 36 26.2 3.606 3.317 65 14.5 5:36 (197, 16)
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Now it is 14.5 mag (June 4, T. Ikemura, H. Sato). It will be observable at 14 mag for a long time from 2017 to 2018.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 18 6.27 20 10.3 3.570 4.346 134 14.5 0:54 (180, 35)
June 17 17 54.46 21 16.5 3.535 4.316 135 14.5 0:15 (180, 34)
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Now it is 15.6 mag (May 20, Kunihiro Shima). It is expected to brighten up to 9 mag in summer in 2018. In the Northern Hemisphere, it stays observable until 2018 summer while the comet will be brightening. In the Southern Hemisphere, it is hardly observable in 2017, but it will be observable in good condition in 2018.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 18 29.23 54 8.4 4.660 4.957 101 15.3 1:17 (180, 1)
June 17 18 19.54 53 58.6 4.584 4.900 102 15.2 0:40 (180, 1)
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It brightened up to 11.5 mag from late March to early April (Mar. 24, Andrew Pearce). Now it is fading. It has already faded down to 15.6 mag (May 6, CAO, San Pedro de Atacama). Bright 12-mag new fragment BT was discovered on Feb. 10, but now it is faint as 16.7 mag (Apr. 18, F.-J. Hambsch, E. Bryssinck). In the Southern Hemisphere, it stays observable for a long time after this. It is getting observable in the morning sky again also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 1 47.03 1 30.4 1.850 1.502 54 15.4 5:33 (239, 34)
June 17 2 0.72 2 37.0 1.863 1.567 57 15.7 5:36 (234, 36)
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Now it is 15.6 mag (Mar. 6, Kunihiro Shima). It is appearing in the morning sky in the Southern Hemisphere. It will appear in the morning sky in July in the Northern Hemisphere. Then it stays observable at 15.5 mag unil the end of 2017.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 2 52.36 4 32.5 6.348 5.589 38 15.5 5:33 (249, 20)
June 17 2 57.96 4 41.2 6.305 5.613 43 15.5 5:36 (244, 25)
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Now it is 16.9 mag (May 31, CAO, San Pedro de Atacama). It will brighten up to 15.5 mag in summer. It will be observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it stays unobservable for some more time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 22 5.12 -38 42.0 1.885 2.513 116 15.9 4:52 ( 0, 86)
June 17 22 7.60 -37 54.2 1.809 2.503 122 15.8 4:27 ( 0, 87)
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Now it is 16.1 mag (May 29, Hiroshi Abe). It is expected to brighten up to 11-12 mag from 2018 to 2019. In the Northern Hemisphere, it stays observable in good condition while the comet will be brightening gradually. In the Southern Hemisphere, it is not observable until 2018 October.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 17 7.15 61 0.0 4.566 4.780 96 16.0 23:49 (180, -6)
June 17 16 50.56 61 31.0 4.539 4.729 94 15.9 23:05 (180, -7)
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First return of a new periodic comet discovered in 2000. Now it is 17.8 mag (Hidetaka Sato). It will brighten rapidly, and it is expected to be observable at 15.5 mag in good condition from July to September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 0 27.23 -15 47.1 2.513 2.538 79 16.2 5:33 (236, 60)
June 17 0 36.21 -14 51.0 2.436 2.536 83 16.1 5:36 (226, 63)
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Now it is 16.6 mag (May 27, T. Ikemura, H. Sato). It stays 16-17 mag for a long time from 2016 to 2019. It stays near by the equator.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 9 17.65 7 3.2 10.024 9.571 60 16.1 18:25 (134, 36)
June 17 9 20.36 7 4.1 10.117 9.568 54 16.1 18:25 (128, 32)
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Now it is 15.9 mag (May 29, T. Ikemura, H. Sato). It was expected to brighten up to 12 mag in summer. But actually, it is fainter than expected by 3-4 mag. 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)
June 10 19 28.54 -32 58.5 1.212 2.144 148 16.4 2:16 (180, 88)
June 17 19 25.78 -32 46.0 1.160 2.125 155 16.1 1:46 (180, 88)
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Now it is 15.8 mag (May 28, iTelescope Observatory, Siding Spring). It stays 16 mag for a long time until summer in 2018. In the Southern Hemisphere, it stays observable in excellent condition until autumn. It locates low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 17 2.92 -38 28.9 2.424 3.412 164 16.3 23:47 ( 0, 87)
June 17 16 58.15 -37 59.1 2.383 3.366 162 16.2 23:14 ( 0, 87)
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Now it is 16.7 mag (June 4, T. Ikemura, H. Sato). It was observed at 17 mag in 2016. In 2017, it will be observable at 15.5 mag in good condition from summer to autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 0 51.43 4 58.7 3.087 2.818 65 16.3 5:33 (223, 40)
June 17 0 59.37 6 10.5 3.005 2.818 69 16.2 5:36 (216, 42)
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It brightened up to 11 mag from spring to summer in 2016. Now it is 17.0 mag (June 2, T. Ikemura, H. Sato). It is observable at 16-17 mag in good condition from spring to summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 20 29.53 -17 10.9 2.351 3.138 133 16.3 3:17 (180, 72)
June 17 20 25.90 -17 25.7 2.320 3.176 141 16.3 2:46 (180, 72)
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Now it is fading rapidly. It has already faded down to 16.9 mag (June 2, T. Ikemura, H. Sato). In the Southern Hemisphere, it stays observable in good condition after this while the comet will be fading. It locates low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 22 46.25 -18 28.2 1.162 1.705 102 16.3 5:33 (180, 73)
June 17 22 39.19 -19 18.1 1.149 1.790 111 16.6 4:59 (180, 74)
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Now it is 16.4 mag (June 1, P. Carson). It stays 16 mag from 2016 to 2017. 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)
June 10 18 46.74 63 37.0 6.260 6.367 91 16.3 1:34 (180, -9)
June 17 18 40.87 64 23.7 6.269 6.377 91 16.3 1:00 (180, -9)
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Small outburst occured in mid March, and it brightened up to 12.3 mag (Mar. 15, Juan Jose Gonzalez). Now it is fading. It has already faded down to 17.0 mag (May 29, Hiroshi Abe). It is still bright visually as 13.9 mag (May 27, Jakub Cerny). It is 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)
June 10 11 49.72 19 9.2 2.611 2.813 90 16.5 18:35 (180, 36)
June 17 11 55.56 17 37.4 2.720 2.839 86 16.7 18:25 (176, 37)
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Now it is 16.9 mag (June 4, M. Jaeger, E. Prosperi, S. Prosperi, W. Vollmann). It will fade out after this, and it will be fainter than 18 mag in August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 18 12.66 24 23.2 2.922 3.663 130 16.6 1:00 (180, 31)
June 17 18 8.20 25 28.7 2.950 3.694 130 16.7 0:28 (180, 30)
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Now it is 17.0 mag (May 29, iTelescope Observatory, Siding Spring). It will brighten up to 14.5 mag in winter. In the Southern Hemisphere, it stays observable in excellent condition until spring in 2018. In the Northern Hemisphere, it stays unobservable until 2018.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 23 22.89 -59 52.0 2.675 3.148 108 17.1 5:33 (349, 65)
June 17 23 39.13 -61 42.0 2.584 3.093 110 17.0 5:36 (354, 63)
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It stayed bright 12 mag for a long time from autum in 2015 to summer in 2016. Now it is fading. It has already faded dwon to 16.2 mag (June 2, T. Ikemura, H. Sato).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 16 24.60 -13 13.4 4.187 5.174 165 17.1 23:08 (180, 68)
June 17 16 18.39 -13 46.5 4.270 5.226 158 17.2 22:34 (180, 69)
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Now it is 16.0 mag (May 23, iTelescope Observatory, Siding Spring). It is observable in good condition in the Southern Hemisphere. But it will be fainter than 18 mag in August. It is not observable in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 8 31.36 -64 43.2 2.228 2.538 95 17.3 18:25 ( 29, 49)
June 17 9 11.44 -62 44.4 2.252 2.558 95 17.3 18:25 ( 31, 51)
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Now it is 17.1 mag (May 29, T. Ikemura, H. Sato). It will be fading and getting lower in the evening sky after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 11 51.99 -12 7.5 4.644 4.983 103 17.3 18:37 (180, 67)
June 17 11 50.86 -10 51.4 4.770 4.987 96 17.4 18:25 (170, 66)
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Now it is 16.9 mag (June 6, Mt. Lemmon Survey). It brightened rapidly, and became brighter than originally expected. It stays 16-17 mag until 2017. In the Northern Hemisphere, it stays observable in excellent condition for a long time. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 11 18.70 52 58.7 7.770 7.531 72 17.4 18:25 (177, 2)
June 17 11 17.76 51 55.1 7.860 7.542 68 17.4 18:25 (172, 3)
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Now it is 17.2 mag (June 5, ATLAS-MLO, Mauna Loa). It is observable in good condition in the Southern Hemisphere. It stays extremely low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 12 38.56 -33 19.2 5.345 5.915 119 17.4 19:23 (180, 88)
June 17 12 39.54 -32 8.5 5.430 5.916 113 17.4 18:57 (180, 87)
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It brightened up to 6.2 mag in June in 2016 (June 24, Marco Goiato). Now it is 16.6 mag (May 27, T. Ikemura, H. Sato). In the Southern Hemisphee, it stays observable in excellent condition after this. It stays low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 12 29.72 -23 3.8 4.611 5.133 115 17.4 19:14 (180, 78)
June 17 12 27.10 -22 15.2 4.784 5.197 108 17.6 18:44 (180, 77)
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Now it is 17.1 mag (May 20, Ken-ichi Kadota). 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 is observable only until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 11 56.88 -26 32.9 5.922 6.333 109 17.6 18:41 (180, 82)
June 17 11 56.42 -26 28.4 5.979 6.291 103 17.6 18:25 (163, 81)
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It has been 17 mag from 2016 to 2017. It stays bright even after the perihelion passage. It is bright as 17.7 mag still now (June 4, Mt. Lemmon Survey). It is observable in excellent condition in the Northern Hemisphere. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 15 10.37 31 9.7 7.393 7.927 118 17.7 21:54 (180, 24)
June 17 15 7.39 31 17.9 7.489 7.957 114 17.7 21:24 (180, 24)
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Return of a new periodic comet which brightened up to 13 mag in 2004. It was not recovered in 2011. It will be observable in excellent condition in autumn. It is expected to brighten up to 14 mag, if the comet is as bright as when it was discovered.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 0 12.33 -11 14.7 1.953 2.055 80 18.1 5:33 (224, 59)
June 17 0 25.66 -10 9.6 1.857 2.023 84 17.7 5:36 (216, 61)
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It stays observable at 18 mag from spring to summer. It is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it stays low for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 22 31.99 -33 53.2 4.939 5.381 110 17.8 5:19 (180, 89)
June 17 22 32.36 -33 54.5 4.870 5.402 116 17.8 4:52 (180, 89)
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Now it is 17.9 mag (May 27, T. Ikemura, H. Sato). It will be brightening slowly until autumn when it becomes 16.5-17 mag. It will be getting lower gradually in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
June 10 14 16.16 -10 32.1 1.730 2.561 136 17.8 21:00 (180, 66)
June 17 14 13.54 -10 40.3 1.762 2.527 128 17.8 20:30 (180, 66)
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Very far object. Outburst occured on Feb. 20, 2015, and it brightened up to 15 mag. Now it is 18.7 mag (May 27, T. Ikemura, H. Sato). It is observable in excellent 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)
June 10 14 22.07 -24 1.0 8.631 9.442 141 17.9 21:06 (180, 79)
June 17 14 21.10 -23 44.7 8.711 9.448 134 18.0 20:38 (180, 79)
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