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It brightened up to 4.7 mag in early May (May 2, Marco Goiato). However, the brightness evolution has stopped after that. Now it is 5.5 mag (May 8, Marco Goiato). It will approach to Sun down to 0.43 a.u. on May 27, and it was expected to brighten up to 3.5 mag. But actually it may be 5 mag at best. In the Southern Hemisphere, it is observable until mid May. In the Northern Hemisphere, it is only visible in extremely low sky in late May. Then it appears in the morning sky at 11 mag in August. And it will be observable in good condition after that while the comet will be fading.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 0 49.77 4 12.9 0.577 0.635 35 3.8 3:25 (265, -1)
May 16 2 5.10 29 9.4 0.579 0.523 22 3.0 3:17 (237, 3)
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Now it is very bright as 9.3 mag (Apr. 25, Chris Wyatt). Brightening very rapidly. It will approach to Sun down to 0.9 a.u. in June, and it is extected to brighten up to 5.5 mag. In the Southern Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it is not observable until late June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 5 33.75 -21 55.7 1.428 1.162 53 8.6 20:28 ( 72,-13)
May 16 5 56.36 -21 31.5 1.323 1.092 53 7.9 20:36 ( 74,-15)
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Now it is 8.5 mag (Apr. 29, Charles S. Morris). It stays bright as 8-9 mag until July. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until late June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 7 47.41 75 49.2 1.685 1.616 68 8.1 20:28 (164, 42)
May 16 9 0.83 73 48.7 1.670 1.622 69 8.1 20:36 (163, 45)
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Now it is very bright as 10.3 mag (Apr. 25, Chris Wyatt). It will approach to Sun down to 0.3 a.u. on July 3, and it is expected to brighten up to 2.5 mag. In the Southern Hemisphere, it stays observable in good condition until early June when it brightens up to 8 mag. But it will not be observable around the perihelion passage. In the Northern Hemisphere, it is not observable now. It will appear in the evening sky at 3-4 mag in mid July, then it stays observable while getting fainter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 6 8.12 -17 30.7 1.624 1.369 57 9.9 20:28 ( 72, -4)
May 16 6 6.24 -12 41.4 1.626 1.238 49 9.5 20:36 ( 81, -9)
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Now it is 9.0 mag (Apr. 29, Charles S. Morris). The nucleus was split into some fragments in late March, and the brightness evolution stopped. It brightened up to 7.0 mag in late March ((Mar. 30, Charles S. Morris). However, it is fading now. It moves along the same orbit as C/1844 Y1 (Great Comet). It approaches to Sun down to 0.25 a.u. on May 31. It was expected to brighten up to -1 mag. But it may disappear before the perihelion passage. In the Northern Hemisphere, it is observable until mid May. In the Southern Hemisphere, it is not observable until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 4 46.59 55 29.4 0.868 0.698 42 9.7 20:28 (143, 21)
May 16 4 17.64 49 19.2 0.816 0.532 31 9.7 20:36 (144, 10)
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Recovered from SWAN images after 24-year blank. Now it is very bright as 10.4 mag (Apr. 28, Chris Wyatt). It stays 10-11 mag until August. In the Southern Hemisphere, it stays observable in the morning sky for a long time. In the Northern Hemisphere, it is too low to observe until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 0 42.31 3 32.1 2.054 1.395 37 10.2 3:25 (266, 0)
May 16 1 5.89 5 6.0 2.029 1.384 38 10.1 3:17 (264, 0)
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Now it is very bright as 8.8 mag (Apr. 28, Carlos Labordena). It continues brightening even after the perihelion passage on Mar. 15. It stays observable for a long time in the Northern Hemisphere. In the Southern Hemisphere, it is not observable until June when it fades down to 13-14 mag. It seems to be a fragment of C/1988 A1 (Liller), like C/1996 Q1 (Tabur) and C/2015 F3 (SWAN).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 9 26.25 77 53.5 1.118 1.286 74 10.4 20:28 (171, 46)
May 16 10 39.68 68 28.5 1.160 1.375 78 11.2 20:36 (165, 55)
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It will approach to Sun down to 0.34 a.u. and brighten up to 7 mag in June. In the Southern Hemisphere, it will appear in the evening sky at 7 mag in early July. Then it stays observable in good condition while the comet will be fading. In the Northern Hemisphere, it is not observable until mid August when the comet will fade down to 12 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 2 40.12 21 27.4 2.085 1.091 7 12.3 3:25 (234,-11)
May 16 3 5.91 23 9.5 1.971 0.976 7 11.7 3:17 (231,-11)
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Now it is 14.2 mag (Apr. 24, Chris Wyatt). Brightening very rapidly. It will brighten up to 8-9 mag from summer to autumn. It will be observable in excellent condition in the Southern Hemisphere. It locates very low around the high light in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 49.21 -1 17.4 1.080 1.983 143 12.8 21:38 ( 0, 54)
May 16 12 44.12 -1 12.3 1.083 1.936 135 12.6 21:06 ( 0, 54)
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Bright new comet. Now it is 13.2 mag (Apr. 28, Alan Hale). It will fade out rapidly after this, and it will be fainter than 18 mag in late June. It stays observable in good condition in the Northern Hemisphere. It will be unobservable after this in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 23 8.89 52 53.8 0.658 0.861 57 13.4 3:25 (228, 39)
May 16 0 35.64 73 54.8 0.730 0.902 59 13.9 3:17 (200, 35)
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Now it is 14.3 mag (Apr. 22, Sandor Szabo). 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)
May 9 14 27.81 79 36.2 3.020 3.064 82 13.8 23:10 (180, 46)
May 16 13 33.03 77 58.3 2.978 2.999 81 13.6 21:50 (180, 47)
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Now it is 13.3 mag (Apr. 20, Sandor Szabo). It stays bright as 13 mag until June. 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 9 1 16.32 64 20.6 4.129 3.572 50 13.7 3:25 (208, 27)
May 16 1 27.39 66 31.2 4.146 3.604 51 13.8 3:17 (207, 28)
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Now it is not observable. It will appear in the morning sky in June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 1 54.22 20 7.0 6.760 5.801 16 13.9 3:25 (242, -4)
May 16 1 59.74 20 39.3 6.730 5.802 21 13.9 3:17 (243, -1)
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Now it is 17.9 mag (Apr. 20, Thomas Lehmann). It will brighten rapidly, and it is expected to brighten up to 9.5 mag in June. But actually, it has not started brightening rapidly yet. It is not observable in June. However, it stays observable in good condition until May while the comet is brightening, and after July while the comet will be fading.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 9 1.67 5 10.5 0.508 1.112 87 14.8 20:28 ( 60, 43)
May 16 8 43.99 8 37.6 0.488 1.010 75 14.0 20:36 ( 75, 35)
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Now it is 14.2 mag (Apr. 14, Sandor Szabo). It stays 13-14 mag from 2020 to 2021. It stays observable in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 33.82 16 56.3 2.502 3.239 129 14.2 21:23 ( 0, 72)
May 16 12 31.71 16 23.5 2.557 3.224 123 14.2 20:53 ( 0, 71)
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Now it is 11.4 mag (Apr. 22, Sandor Szabo). It will fade out rapidly after this, and will be fainter than 18 mag in June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 6 20.42 30 21.8 1.082 0.825 46 14.7 20:28 (110, 26)
May 16 7 16.42 30 33.2 1.103 0.926 51 15.6 20:36 (108, 30)
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Now it is bright as 13.9 mag (Apr. 24, Chris Wyatt). It stays 15 mag until summer. It stays observable for a long time in the Southern Hemisphere. It is not observable until August in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 2 43.39 -39 53.7 4.176 3.731 57 14.8 3:25 (294,-45)
May 16 2 49.51 -38 47.3 4.181 3.757 58 14.9 3:17 (293,-42)
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Now it is 15.3 mag (Apr. 25, Hiroshi Abe). 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)
May 9 14 24.43 -20 21.1 4.088 5.085 170 15.1 23:13 ( 0, 35)
May 16 14 18.84 -20 38.8 4.070 5.044 162 15.1 22:40 ( 0, 34)
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Now it is 15.4 mag (Apr. 22, Chris Wyatt). It stays 14-15 mag until 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until June in 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 16 59.85 -83 18.0 4.574 5.057 113 15.3 1:57 ( 0,-28)
May 16 16 42.91 -83 55.7 4.518 5.028 114 15.3 1:13 ( 0,-29)
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Now it is 15.7 mag (Apr. 20, Sandor Szabo). It is expected to be observable at 5-6 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it is not observable at the high light from 2022 summer to 2023 summer. In the Southern Hemisphere, it is only visible in the extremely low sky in summer in 2020. But it will be observable in good condition at the high light.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 18 8.60 52 31.5 8.987 9.209 99 15.4 3:01 (180, 72)
May 16 18 4.88 52 52.2 8.915 9.159 100 15.4 2:29 (180, 72)
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Now it is 15.9 mag (Apr. 21, Catalina Sky Survey). It stays 15-16 mag for a long time until 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 20 50.53 4 52.3 4.339 4.486 91 15.7 3:25 (305, 46)
May 16 20 47.46 6 23.2 4.223 4.483 98 15.6 3:17 (310, 51)
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It brightens up to 16 mag in May. But it is not observable in this apparition. It has been observed at three apparitions in 2003, 2012 and 2016.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 2 55.07 13 37.7 1.599 0.597 4 15.9 3:25 (237,-19)
May 16 3 41.62 15 44.4 1.626 0.622 4 16.4 20:36 (126,-19)
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Now it is 17.1 mag (Apr. 23, D. Buczynski). It will stay at 14 mag for a long time from 2021 to 2022. In the Northern Hemisphere, it stays observable in good condition while brightening gradually. In the Southern Hemisphere, it stays locating low for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 19 3.81 33 54.8 6.139 6.448 103 16.1 3:25 (277, 83)
May 16 18 59.43 34 10.2 6.041 6.416 107 16.0 3:17 (297, 88)
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New comet. Now it is 16.5 mag (May 4, E. Guido, A. Valvasori). It will brighten up to 13.5 mag in spring in 2021. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until spring in 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 22 43.95 -49 33.0 4.452 4.532 88 16.3 3:25 (324,-11)
May 16 22 42.76 -50 47.4 4.302 4.489 94 16.2 3:17 (327,-10)
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It brightened up to 13.8 mag in autumn in 2019 (Sept. 3, Chris Wyatt). Now it is fading slowly. It is appearing in the morning sky in the Southern Hemisphere. It will appear in June also in the Northern Hemisphere. In 2020, it stays observable in good condition while the comet will be fading from 16 to 17 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 0 25.15 -5 20.9 6.175 5.514 45 16.3 3:25 (275, -2)
May 16 0 28.38 -4 36.7 6.133 5.553 50 16.3 3:17 (277, 2)
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Now it is 17.6 mag (Mar. 22, Toshihiko Ikemura, Hirohisa Sato). It will brighten up to 15.5 mag from June to August, and it will be observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 19 12.55 -5 16.6 1.505 2.173 118 16.4 3:25 (345, 49)
May 16 19 17.57 -4 19.4 1.429 2.154 123 16.3 3:17 (350, 50)
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It brightened up to 13.2 mag from spring to autumn in 2019 (June 30, Thomas Lehmann). Now it is fading slowly. It has already faded down to 16.0 mag (Apr. 25, iTelescope Observatory, Siding Spring). In the Southern Hemisphere, it stays observable for a long time. In the Northern Hemisphere, it is not observasble until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 0 5.53 -31 52.9 4.280 3.965 65 16.3 3:25 (300,-13)
May 16 0 8.09 -31 22.2 4.229 4.002 70 16.4 3:17 (302, -9)
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Now it is 16.2 mag (Apr. 22, D. Buczynski). It will brighten up to 12 mag in winter in 2022. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable until 2021 November.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 0 3.83 48 10.0 6.947 6.314 47 16.4 3:25 (230, 30)
May 16 0 9.88 49 5.2 6.869 6.269 50 16.4 3:17 (229, 32)
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Now it is 15.8 mag (Apr. 28, ATLAS-MLO, Mauna Loa). It is observable at 16 mag in 2020. 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 9 19 56.88 -29 49.2 6.163 6.621 112 16.6 3:25 (340, 22)
May 16 19 52.17 -29 48.9 6.062 6.633 120 16.6 3:17 (346, 24)
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Now it is 16.8 mag (Apr. 28, ATLAS-MLO, Mauna Loa). It stays observable at 16-17 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)
May 9 10 41.93 -18 25.0 6.048 6.581 117 16.6 20:28 ( 16, 35)
May 16 10 43.19 -17 48.7 6.135 6.582 112 16.6 20:36 ( 26, 33)
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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 16.9 mag (Apr. 22, J. Drummond). In the Southern Hemisphere, it stays observable for a long time until the comet will fade out, although it becomes extremely low in June. In the Northern Hemisphere, it is not observable until late August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 5 46.99 -13 17.4 7.232 6.635 50 16.7 20:28 ( 78, -6)
May 16 5 50.28 -12 40.9 7.344 6.689 46 16.8 20:36 ( 83,-12)
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It brightened up to 12-13 mag from 2018 to 2019. Now it is fading. It has already faded down to 16.9 mag (Apr. 25, Blue Mountains Observatory, Leura). In the Southern Hemisphere, it stays observable in good condition for a long time. 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)
May 9 9 20.16 -67 47.4 5.005 5.395 107 16.8 20:28 ( 13,-16)
May 16 9 16.06 -66 13.3 5.078 5.442 105 16.9 20:36 ( 17,-17)
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Now it is 16.8 mag (Apr. 21, ATLAS-MLO, Mauna Loa). It will be fading after this, and it will be fainter than 18 mag in late June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 13 0.97 0 30.9 1.339 2.240 144 16.9 21:50 ( 0, 55)
May 16 12 59.98 0 8.1 1.401 2.257 138 17.1 21:22 ( 0, 55)
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New comet. Now it is 15.3 mag (Apr. 25, Ken-ichi Kadota). It approached to Sun down to 0.5 a.u. in March, and it must have brightened up to 14 mag. It will fade out very rapidly after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 8 21.77 -3 29.7 0.737 1.152 80 17.0 20:28 ( 60, 30)
May 16 9 7.31 -4 31.9 0.823 1.255 85 17.6 20:36 ( 57, 31)
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Now it is 17.1 mag (Apr. 23, D. Buczynski). It will be observable at 16.5-17 mag from spring in 2020 to summer in 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 19 46.31 23 34.4 4.570 4.848 99 17.0 3:25 (300, 70)
May 16 19 40.30 23 51.8 4.458 4.832 105 17.0 3:17 (313, 75)
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Now it is 16.9 mag (Apr. 24, J. Drummond). It is expected to brighten up to 13 mag in 2022. In 2020, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it is not observable. It will be observable from autumn to winter, but it locating extremely low.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 6 28.52 -27 3.9 7.662 7.318 66 17.0 20:28 ( 61, -6)
May 16 6 32.73 -26 38.7 7.675 7.278 63 17.0 20:36 ( 65,-11)
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It brightened up to 15.9 mag in February and March (Feb. 18, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 17.3 mag (Apr. 26, A. Diepvens). It will be fainter than 18 mag in late June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 10 7.80 2 21.1 1.080 1.652 104 17.1 20:28 ( 37, 51)
May 16 10 13.98 -0 55.4 1.146 1.657 100 17.2 20:36 ( 44, 44)
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Now it is 16.4 mag (Apr. 14, Katsumi Yoshimoto). It will fade out after this, and will be fainter than 18 mag in late June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 35.06 -1 44.5 1.223 2.100 140 17.2 21:25 ( 0, 53)
May 16 12 36.00 -1 43.4 1.271 2.100 133 17.2 20:58 ( 0, 53)
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Now it is 17.9 mag (Apr. 25, Ken-ichi Kadota). It stays observable at 16-17 mag for a long time until 2024.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 16 5.81 -17 56.0 8.958 9.938 165 17.2 0:59 ( 0, 37)
May 16 16 1.52 -17 37.8 8.916 9.919 172 17.2 0:27 ( 0, 37)
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It brightened up to 8.3 mag in last September (Sept. 20, Maik Meyer). Now it is fading. It has already faded down to 17.1 mag (Apr. 5, iTelescope Observatory, Siding Spring). 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)
May 9 1 18.39 -62 30.9 3.435 3.452 82 17.4 3:25 (326,-36)
May 16 1 34.48 -64 24.8 3.435 3.522 86 17.5 3:17 (328,-36)
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Now it is 17.2 mag (Apr. 24, J. Drummond). It will brighten up to 15.5 mag in early 2021. In 2020, it stays observable at 17 mag until November in the Southern Hemisphere, or until July in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 14 31.76 -33 16.3 2.585 3.561 162 17.4 23:20 ( 0, 22)
May 16 14 25.05 -32 58.5 2.542 3.507 159 17.4 22:46 ( 0, 22)
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Now it is 17.6 mag (Apr. 27, ATLAS-MLO, Mauna Loa). It will be fading slowly after this. It is observable in good condition in the Northern Hemisphere. In the Southern Hemisphere, it is observable in the extremely low sky only in 2021 spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 44.58 54 2.5 8.554 8.830 102 17.5 21:34 (180, 71)
May 16 12 42.03 53 24.5 8.630 8.842 98 17.5 21:04 (180, 72)
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Now it is 17.6 mag (Apr. 24, D. Buczynski). It will brighten up to 16.5 mag and will be observable in good condition from June to October.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 20 13.58 4 24.0 1.933 2.341 100 17.6 3:25 (317, 52)
May 16 20 19.80 6 3.8 1.846 2.321 104 17.5 3:17 (320, 55)
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Now it is 17.3 mag (Apr. 24, Catalina Sky Survey). It became brighter than orignally predicted. It stays observable at 17 mag in good condition until autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 41.43 -6 54.2 1.410 2.301 143 17.6 21:31 ( 0, 48)
May 16 12 39.14 -7 2.1 1.439 2.280 136 17.5 21:01 ( 0, 48)
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Now it is 17.3 mag (Apr. 23, D. Buczynski). It will be observable at 16.5-17 mag from 2020 to 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 1 49.15 67 5.7 6.885 6.302 51 17.6 3:25 (204, 25)
May 16 1 53.11 67 18.6 6.877 6.286 50 17.6 3:17 (204, 26)
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It will pass the perihelion in 2021, and it is predicted to be observable at 17-18 mag from 2020 to 2022. However, it has not been observed at all since 2015. It was not detected, fainter than 20.5 mag, in 2017 May (Werner Hasubick).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 20 38.88 -21 60.0 5.782 6.074 102 17.6 3:25 (327, 26)
May 16 20 40.21 -21 55.3 5.663 6.061 108 17.6 3:17 (331, 28)
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Now it is 18.4 mag (Apr. 22, W. Hasubick). It stays observable at 18 mag for a long time from 2019 to 2021.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 19 15.83 -16 44.0 7.127 7.684 120 17.7 3:25 (347, 37)
May 16 19 14.12 -17 12.6 7.030 7.686 127 17.7 3:17 (353, 38)
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Now it is 17.7 mag (Apr. 14, Y. Sugiyama). It will brighten up to 13 mag in 2022. In 2020, it is observable at 17.5 mag in good condition in spring. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 10 9.62 21 3.4 4.151 4.410 98 17.7 20:28 ( 60, 66)
May 16 10 11.24 20 38.9 4.243 4.397 92 17.7 20:36 ( 70, 59)
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It brightens up to 13.5 mag in winter. But it is not observable at high light. In the Southern Hemisphere, it stays observable in good condition until autumn when the comet will brighten up to 14 mag. It stays locating very low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 19 1.24 -45 9.0 2.235 2.919 123 18.0 3:25 (355, 10)
May 16 19 1.41 -45 39.1 2.138 2.889 129 17.8 3:17 (358, 9)
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Now it is 17.6 mag (Feb. 3, ATLAS-HKO, Haleakala). It brightened up to 14 mag from autumn to winter in 2018. Now it is fading. It will be fainter than 18 mag in May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 9 12 49.59 -3 5.7 4.038 4.891 144 17.8 21:39 ( 0, 52)
May 16 12 46.03 -3 12.5 4.146 4.929 136 17.9 21:08 ( 0, 52)
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