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It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). It was visible at 7-8 mag between Apr. 7-9 in the SWAN images. In the Southern Hemisphere, it was observable in the extremely low sky in mid April. But it was not visible, fainter than 7.6 mag (Apr. 19, Chris Wyatt). It was not detected by photo, fainter than 9.0 mag (Apr. 22, Michael Mattiazzo). It is fainter than this ephemeris. In the Northern Hemisphere, it will appear soon, and it stays observable in good condition after that while the comet will be fading. In the Southern Hemisphere, it is not observable until August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 3 2.39 5 55.2 0.887 0.294 16 4.4 20:09 (106,-10)
Apr. 30 3 30.00 21 0.6 0.682 0.400 16 5.2 20:17 (119, -2)
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It has not been observed yet in this apparition. It will brighten up to 9 mag in May. The condition is very bad in this apparition. It is observable only in the extremely low sky from mid May to mid July in the Northern Hemisphere, or from early June to early August in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 2 23.42 13 11.1 1.552 0.560 5 9.4 20:09 (117,-13)
Apr. 30 3 11.43 17 18.3 1.521 0.565 10 9.2 20:17 (118, -8)
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Now it is bright as 11.3 mag (Apr. 7, Osamu Miyazaki). The brightness evolution is slower than originally expected. It is expected to be observable at 7 mag for a long time from 2022 to 2023. In the Northern Hemisphere, it stays observable in good condition until autumn. However, it is not observable at the high light from autumn to 2023 summer. In the Southern Hemisphere, it stays observable in good condition for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 18 53.90 11 47.6 3.004 3.383 103 9.9 3:47 (324, 63)
Apr. 30 18 51.55 11 44.1 2.844 3.320 109 9.7 3:37 (334, 65)
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It brightened very rapidly up to 9.3 mag in March (Mar. 24, Michael Jager). Now it is not observable. In the Southern Hemisphere, it will appear in the morning sky in late May. Then it stays observable in good condition after that. In the Northern Hemisphere, it will never be observable again.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 1 42.39 16 23.4 2.027 1.033 6 9.8 3:47 (240,-12)
Apr. 30 1 55.78 13 5.2 2.060 1.071 7 10.2 3:37 (243,-13)
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Now it is 10.4 mag (Apr. 21, Marco Goiato). It will be getting lower after this. In the Northern Hemisphere, it will be unobservable in May. In the Southern Hemisphere, it stays observable until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 6 57.08 13 48.2 3.866 3.677 71 10.3 20:09 ( 77, 41)
Apr. 30 7 2.73 12 56.5 3.978 3.694 66 10.4 20:17 ( 81, 35)
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Now it is 11.5 mag (Apr. 10, Thomas Lehmann). In the Northern Hemisphere, it stays extremely low until spring. In the Southern Hemisphere, it stays observable at 11 mag until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 22 36.80 -9 8.9 1.939 1.595 55 11.0 3:47 (288, 10)
Apr. 30 22 54.84 -7 39.1 1.916 1.613 57 11.1 3:37 (287, 10)
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Now it is bright as 11.6 mag (Apr. 22, Marco Goiato). It stays observable at 11-12 mag until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 11 45.12 -16 26.5 3.384 4.261 146 11.5 21:39 ( 0, 39)
Apr. 30 11 44.23 -14 51.5 3.430 4.256 140 11.5 21:11 ( 0, 40)
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Now it is very bright as 11.6 mag (Apr. 9, Ken Harikae). It will brighten up to 10-11 mag from spring to summer. In the Southen Hemisphere, it stays observable in good condition for a long time after this. In the Northern Hemisphere, it is hardly observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 21 18.17 -37 39.3 1.729 1.889 82 12.0 3:47 (321, 3)
Apr. 30 21 29.71 -42 59.4 1.582 1.861 89 11.7 3:37 (325, 0)
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Now it is bright as 10.6 mag (Apr. 22, Osamu Miyazaki). It will be fading after this. But it may stay brighter than this ephemeris for a while. In the Northern Hemisphere, it stays observable in excellent condition for a long time. In the Southern Hemisphere, it stays extremely low after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 5 46.42 41 51.0 1.917 1.606 56 11.9 20:09 (119, 39)
Apr. 30 6 13.35 42 36.6 1.996 1.652 55 12.2 20:17 (120, 38)
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Now it is 13.0 mag (Apr. 10, Thomas Lehmann). It stays 12-13 mag for a while. It is observable in excellent condition in the Southern Hemisphere. It locates low until May in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 21 17.44 -21 31.9 1.505 1.617 77 12.4 3:47 (311, 15)
Apr. 30 21 34.59 -21 8.7 1.473 1.639 80 12.5 3:37 (311, 16)
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It brightened up to 3 mag from mid December to late December. Now it is fading. It has already faded down to 12.2 mag (Apr. 2, Thomas Lehmann). It is observable in good condition in the Southern Hemisphere. It is getting observable again also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 20 29.26 -37 18.7 1.784 2.079 92 12.9 3:47 (329, 9)
Apr. 30 20 12.62 -38 0.6 1.734 2.177 101 13.1 3:37 (335, 11)
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Now it is 12.9 mag (Apr. 21, Michael Jager). It is expected to brighten up to 11 mag in summer. In the Northern Hemisphere, it stays observable in good condition until June when it brightens up to 11 mag. But it is not observable after the high light. In the Souther Hemisphere, it is not observable until October.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 2 50.06 58 55.6 2.397 1.871 47 13.6 20:09 (149, 20)
Apr. 30 3 24.54 59 21.6 2.337 1.790 45 13.4 20:17 (149, 20)
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Now it is 15.0 mag (Apr. 20, Chris Wyatt). It was expected to brighten up to 13 mag in spring. But actually, it is fainter than this ephemeris recently. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable until autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 6 36.59 -54 4.5 3.050 3.179 88 13.4 20:09 ( 29,-11)
Apr. 30 6 32.35 -51 37.0 3.098 3.168 84 13.5 20:17 ( 35,-13)
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Now it is 13.9 mag (Apr. 21, Michael Jager). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it locates extremely low in 2022, but it will be observable in good condition in 2023.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 15 40.06 43 15.0 4.124 4.708 119 13.7 1:38 (180, 82)
Apr. 30 15 27.13 43 37.5 4.082 4.671 120 13.6 0:58 (180, 81)
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Now it is 13.7 mag (Apr. 21, Michael Jager). It is observable at 13 mag in good condition until early summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 9 33.29 17 24.6 1.763 2.276 107 13.7 20:09 ( 30, 70)
Apr. 30 9 38.70 16 41.7 1.827 2.264 102 13.7 20:17 ( 45, 66)
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Now it is 15.5 mag (Apr. 5, Slooh.com Chile Observatory). It will brighten up to 12.5 mag in summer. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemisphere, it is not observable until August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 22 48.30 -54 45.2 3.343 3.292 78 13.8 3:47 (324,-20)
Apr. 30 22 46.41 -55 22.3 3.211 3.263 83 13.7 3:37 (326,-18)
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Now it is 14.1 mag (Apr. 14, iTelescope Observatory, Siding Spring). It will brighten up to 13 mag in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 19 2.90 -27 22.4 2.592 3.063 108 13.8 3:47 (342, 25)
Apr. 30 19 6.30 -27 41.7 2.500 3.059 114 13.7 3:37 (346, 26)
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Now it is 13.4 mag (Apr. 21, Michael Jager). It is expected to brighten up to 10 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until 2023 autumn. In the Southern Hemipshere, it stays unobservable until 2023 summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 10 42.12 61 25.8 4.364 4.588 96 13.8 20:36 (180, 64)
Apr. 30 10 30.06 61 7.8 4.401 4.531 90 13.8 20:17 (174, 64)
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Now it is fainter than 14.3 mag (Mar. 22, Chris Wyatt). It is observable until April in the Southern Hemisphere, or until May in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 4 51.31 29 4.3 6.677 5.978 42 13.9 20:09 (110, 23)
Apr. 30 4 56.81 29 5.7 6.751 5.981 37 14.0 20:17 (114, 18)
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Now it is 14.6 mag (Apr. 10, Michael Jager). It is expected to brighten up to 11 mag in 2023. In the Northern Hemisphere, it stays observable in good condition until November. But it becomes unobservable after that. In the Southern Hemisphere, it stays observable in good condition after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 19 1.37 18 46.9 4.437 4.713 99 14.3 3:47 (311, 67)
Apr. 30 18 59.45 18 55.0 4.300 4.667 105 14.2 3:37 (321, 70)
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Now it is 16.4 mag (Apr. 21, Michael Jager). It is expected to brighten up to 11 mag from summer to autumn. It stays observable in good condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes extremely low from August to September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 9 39.05 30 22.1 1.349 1.866 103 14.8 20:09 ( 60, 81)
Apr. 30 9 39.81 29 25.7 1.363 1.802 97 14.6 20:17 ( 74, 74)
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Now it is 14.8 mag (Apr. 15, iTelescope Observatory, Siding Spring). It stays at 15-16 mag for a long time. In the Southern Hemisphere, it stays observable in excellent condition for a long time. In the Northern Hemiphere, it locates extremely low in spring.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 16 49.60 -46 17.5 4.447 5.163 130 14.9 2:48 ( 0, 9)
Apr. 30 16 40.01 -47 23.6 4.391 5.176 137 14.9 2:11 ( 0, 8)
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It brightened up to 12.3 mag from spring to summer (June 15, Marco Goiato). Now it is fading. It has already faded down to 14.9 mag (Apr. 5, Chris Wyatt).
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 12 50.97 29 57.7 3.983 4.741 134 14.9 22:44 ( 0, 85)
Apr. 30 12 41.79 30 42.7 4.097 4.784 128 15.0 22:08 ( 0, 86)
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It brightened up to 8.5 mag from autumn to winter (Dec. 2, Toshihiko Ikemura, Hirohisa Sato). Now it is fading. It has already faded down to 13.7 mag (Apr. 5, Chris Wyatt). It stays observable in good condition for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 9 6.73 20 43.6 1.853 2.263 100 14.9 20:09 ( 50, 69)
Apr. 30 9 15.12 19 50.7 1.988 2.317 95 15.2 20:17 ( 60, 64)
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It is expected to brighten up to 13.5 mag in early summer. In the Southern Hemisphere, it will appear in the morning sky in May. Then it stays observable in good condition after that. In the Northern Hemisphere, it is not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 2 8.36 -9 54.3 2.308 1.430 22 15.4 20:09 (100,-31)
Apr. 30 2 17.44 -11 50.3 2.207 1.382 26 15.1 3:37 (261,-33)
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It approaches to Sun down to 0.14 a.u. on May 15. But it is not observable around that time. In the Northern Hemisphere, it will appear in the morning sky at 16 mag in June. It is hardly observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 3 38.30 17 55.1 1.470 0.687 24 15.8 20:09 (110, 3)
Apr. 30 3 52.86 17 28.9 1.331 0.526 20 15.2 20:17 (112, -1)
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Now it is 15.9 mag (Apr. 10, Michael Jager). It will approach to Earth down to 0.29 a.u. in 2023 February, and it is expected to brighten up to 5 mag. In the Northern Hemisphere, it stays observable in excellent condition. In the Southern Hemisphere, it becomes unobservable from late September to early February.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 20 14.41 11 18.9 3.700 3.739 84 15.6 3:47 (297, 50)
Apr. 30 20 13.74 13 3.2 3.523 3.665 90 15.4 3:37 (300, 54)
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Now it is 15.1 mag (Apr. 5, Chris Wyatt). It became brighter after the perihelion passage. It will be fading after this, and it will be fainter than 18 mag in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 10 42.62 5 44.1 3.142 3.837 127 15.6 20:37 ( 0, 61)
Apr. 30 10 36.49 4 59.0 3.282 3.877 119 15.7 20:17 ( 7, 60)
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Now it is 15.7 mag (Mar. 28, ATLAS-MLO, Mauna Loa). It continues brightening even after the perihelion passage. It is observable at 15 mag in good condition for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 10 31.32 2 33.2 1.827 2.549 125 15.7 20:26 ( 0, 58)
Apr. 30 10 36.76 4 20.9 1.926 2.578 119 15.9 20:17 ( 6, 59)
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It brightened very rapidly up to 9.2 mag in winter (Jan. 31, Chris Wyatt). Now it is fading. But it is still bright as 12.6 mag (Apr. 5, Chris Wyatt). It will be fainter than 18 mag in May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 8 8.47 14 44.5 1.354 1.666 88 15.8 20:09 ( 62, 55)
Apr. 30 8 27.76 14 9.0 1.465 1.726 86 16.4 20:17 ( 65, 52)
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Now it is 15.7 mag (Apr. 10, Michael Jager). It stays observable at 16 mag from 2021 to 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 16 11.35 35 55.1 4.354 4.971 122 15.8 2:09 (180, 89)
Apr. 30 16 7.40 37 26.3 4.369 4.989 122 15.8 1:37 (180, 88)
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Now it is 17.8 mag (Apr. 21, J.-C. Merlin). It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than predicted by 2-3 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 20 18.93 -19 0.3 1.057 1.458 89 16.1 3:47 (321, 25)
Apr. 30 20 33.70 -16 4.6 1.031 1.474 92 16.1 3:37 (320, 28)
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It brightened up to 9.5 mag in early summer in 2021 (June 27, Marco Goiato). Now it is fading. It has already faded down to 18.2 mag (Apr. 18, E. Cortes). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it is not observable until June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 22 42.36 -30 45.0 4.112 3.786 64 16.4 3:47 (304, -5)
Apr. 30 22 49.67 -30 52.4 4.083 3.845 69 16.5 3:37 (306, -3)
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It brightened up to 10.6 mag in autumn (Oct. 10, Osamu Miyazaki). Now it is fading. It has already faded down to 14.4 mag (Apr. 4, Toshihiko Ikemura, Hirohisa Sato). It stays observable in good condition for a long time.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 7 29.19 14 52.7 2.644 2.647 79 16.5 20:09 ( 72, 48)
Apr. 30 7 38.75 14 50.1 2.774 2.691 74 16.7 20:17 ( 77, 43)
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Now it is 17.1 mag (Apr. 2, A. Maury, G. Attard, D. Parrott). It will brighten up to 16 mag from spring to summer. It locates somewhat low in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 19 46.61 -22 0.6 2.841 3.141 97 16.6 3:47 (330, 27)
Apr. 30 19 51.15 -22 7.4 2.753 3.148 103 16.5 3:37 (333, 28)
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Now it is 16.6 mag (Apr. 12, Hirohisa Sato). It was observed at 15 mag in 2021. Now it is fading. It stays observable at 16-17 mag for a while in 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 18 47.08 17 36.7 4.874 5.200 103 16.6 3:47 (320, 68)
Apr. 30 18 45.98 19 10.7 4.818 5.219 108 16.6 3:37 (329, 72)
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It brightened up to 14 mag in 2021. Now it is fading. Appearing in the morning sky. It is observable at 16-17 mag in 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 23 51.53 1 50.7 6.190 5.384 33 16.6 3:47 (268, 1)
Apr. 30 23 55.29 2 48.6 6.157 5.417 39 16.6 3:37 (269, 4)
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It brightened up to 14 mag from 2020 to 2021. Now it is fading slowly. It is observable at 16.5-17 mag in 2022.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 23 43.04 -16 18.6 4.213 3.568 44 16.6 3:47 (284, -8)
Apr. 30 23 51.05 -15 45.2 4.162 3.586 49 16.6 3:37 (285, -6)
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Now it is 16.2 mag (Jan. 27, SONEAR Observatory, Oliveira). It will be fading slowly after this. In the Southern Hemisphere, it stays observable in good condition for a long time, although it became extremely low temporarily from March to April. In the Northern Hemisphere, it is not observable until July.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 1 23.37 -30 2.1 5.178 4.500 43 16.7 3:47 (285,-35)
Apr. 30 1 30.03 -29 9.0 5.179 4.536 45 16.7 3:37 (285,-32)
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First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.6 mag (Apr. 9, Hirohisa Sato). It will be unobservable in June. But it will become observable again at 17 mag from autum to winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 6 32.39 16 39.0 4.319 4.007 65 16.7 20:09 ( 84, 38)
Apr. 30 6 38.90 17 9.4 4.419 4.014 60 16.8 20:17 ( 89, 32)
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Now it is 16.4 mag (Mar. 22, Thomas Lehmann). It will be fading after this. In the Northern Hemisphere, it stays observable in good condition for a long time. It locates low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 12 20.95 44 19.0 2.588 3.198 118 16.7 22:14 (180, 81)
Apr. 30 12 1.99 43 4.3 2.713 3.247 113 16.9 21:28 (180, 82)
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Now it is 16.1 mag (Apr. 9, Thomas Lehmann). It will be fading after this, and it will be fainter than 18 mag in June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 11 22.11 13 45.9 1.619 2.417 132 16.8 21:17 ( 0, 69)
Apr. 30 11 23.10 13 24.3 1.709 2.445 126 17.0 20:50 ( 0, 68)
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Now it is 16.8 mag (Apr. 20, Catalina Sky Survey). It stays observable at 17-18 mag for a long time until 2024.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 13 58.14 1 31.2 7.851 8.831 166 16.9 23:52 ( 0, 56)
Apr. 30 13 53.47 2 1.6 7.868 8.828 161 16.9 23:20 ( 0, 57)
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Now it is 16.4 mag (Apr. 15, ATLAS Chile). It stays observable at 16-17 mag in April. However, it will fade out rapidly, and it will be fainter than 18 mag in late May. It is observable in excellent condition in the Southern Hemisphere. It is not observable at all in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 0 51.32 -85 21.9 1.159 1.635 97 17.0 3:47 (354,-36)
Apr. 30 5 10.79 -79 29.5 1.210 1.660 96 17.1 20:17 ( 13,-33)
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Now it is 16.7 mag (Apr. 21, Michael Jager). It stays 17 mag for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 13 21.53 -8 10.7 3.715 4.706 169 17.0 23:15 ( 0, 47)
Apr. 30 13 18.25 -7 55.8 3.740 4.707 161 17.0 22:45 ( 0, 47)
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Now it is 16.5 mag (Apr. 21, Catalina Sky Survey). Fading slowly. In the Northern Hemisphere, it stays observable in good condition for a long time. In the Southern Hemisphere, it is not observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 19 22.28 61 4.0 9.187 9.134 83 17.0 3:47 (202, 60)
Apr. 30 19 19.84 62 6.6 9.181 9.144 84 17.1 3:37 (197, 61)
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Now it is 16.8 mag (Apr. 16, ATLAS Chile). It will brighten up to 13-14 mag from 2024 to 2025.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 7 14.78 -26 25.2 8.100 8.080 85 17.1 20:09 ( 41, 15)
Apr. 30 7 17.12 -25 57.3 8.136 8.043 81 17.1 20:17 ( 47, 11)
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Now it is 17.4 mag (Apr. 7, ATLAS Chile). It stays 17 mag for a long time from 2021 to 2022. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it locates extremely low, and it is observable only until April.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 6 40.09 -42 17.1 5.477 5.462 83 17.1 20:09 ( 37, -2)
Apr. 30 6 40.42 -41 51.0 5.541 5.474 80 17.2 20:17 ( 42, -6)
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It brightened rapidly up to 14.5 mag in winter (Feb. 9, Toshiyuki Takahashi). Now it is fading rapidly. It has already faded down to 17.7 mag (Apr. 16, Y. Sugiyama). It will be fainter than 18 mag in May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 8 16.74 11 34.3 2.486 2.701 91 17.3 20:09 ( 56, 55)
Apr. 30 8 23.87 11 9.2 2.591 2.718 86 17.5 20:17 ( 63, 49)
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It has not been observed yet in this apparition. appearing in the morning sky. It will brighten up to 15 mag in autumn, and it will be observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 22 47.41 -5 49.6 3.023 2.523 51 17.5 3:47 (284, 9)
Apr. 30 22 59.02 -4 46.2 2.930 2.497 55 17.4 3:37 (284, 11)
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Now it is 16.8 mag (Apr. 6, Ken-ichi Kadota). It started fading before the perihelion passage. It was predicted to stay at 16 mag for a long time. But actually, 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 is not observable until 2023.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 0 17.07 75 56.3 4.067 3.756 65 17.4 3:47 (196, 32)
Apr. 30 0 19.59 76 34.5 4.084 3.756 64 17.5 3:37 (196, 33)
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Now it is 17.9 mag (Apr. 20, Michael Jager). It is expected to brighten up to 12.5 mag in winter. It will become unobservable temporarily at 17 mag in July. In the Northern Hemisphere, it will become observable again in October. Then it stays observable in good condition after that. In the Southern Hemisphere, it is not observable at the high light.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 10 41.96 -2 22.2 3.220 3.938 129 17.5 20:36 ( 0, 53)
Apr. 30 10 37.16 -0 33.8 3.254 3.874 121 17.4 20:17 ( 6, 54)
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It brightened up to 14.2 mag from summer to autumn in 2021 (Sept. 3, C. S. Morris). Now it is 17.3 mag (Apr. 13, Catalina Sky Survey). Fading slowly. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 16 9.25 68 38.7 6.720 6.896 95 17.5 2:06 (180, 56)
Apr. 30 15 54.78 69 16.3 6.778 6.934 94 17.6 1:25 (180, 56)
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Now it is 17.6 mag (Apr. 10, Ken-ichi Kadota). It stayed 17.5 mag for a long time in 2021. It will be fading slowly after this. In the Northern Hemisphere, it is observable in good condition. It is not observable in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 11 48.36 68 53.7 7.060 7.225 95 17.6 21:42 (180, 56)
Apr. 30 11 42.90 67 58.9 7.131 7.240 92 17.6 21:10 (180, 57)
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Now it is 17.6 mag (Apr. 21, ATLAS Chile). It will brighten up to 16 mag in 2023. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is observable only until May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 9 37.55 -16 23.9 3.700 4.242 116 17.6 20:09 ( 11, 38)
Apr. 30 9 36.17 -16 24.3 3.748 4.202 110 17.6 20:17 ( 22, 36)
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Now it is 17.1 mag (Apr. 17, ATLAS South Africa). It will brighten up to 15-16 mag in 2023. Cometary activity was detected by Cristovao Jacques on Dec. 12, and by Luca Buzzi and Andrea Aletti on Feb. 23.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 6 17.17 -13 42.9 5.160 4.883 68 17.7 20:09 ( 60, 16)
Apr. 30 6 16.82 -12 57.6 5.211 4.838 63 17.7 20:17 ( 67, 10)
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Now it is 17.1 mag (Feb. 28, Hidetaka Sato). It was observed at 16 mag from 2020 to 2021. 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)
Apr. 23 14 35.38 -42 32.6 5.336 6.218 148 17.7 0:34 ( 0, 12)
Apr. 30 14 25.76 -42 30.5 5.345 6.253 152 17.8 23:52 ( 0, 12)
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It was observed at 16 mag from 2020 to 2021. Now it is fading. It will be fainter than 18 mag in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 22 24.74 15 21.0 7.182 6.619 52 17.8 3:47 (269, 26)
Apr. 30 22 25.93 15 22.5 7.115 6.640 58 17.8 3:37 (271, 29)
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Now it is 18.0 mag (Apr. 12, Ken-ichi Kadota). In the Northern Hemisphere, it stays observable for a long time while it is getting fainter slowly. It locates extremely low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 14 12.87 47 20.4 7.661 8.214 120 17.8 0:11 (180, 78)
Apr. 30 14 7.61 47 11.0 7.739 8.260 118 17.9 23:33 (180, 78)
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Now it is 18.8 mag (Apr. 20, Michael Jager). It is observable at 17 mag from spring to summer. In the Northern Hemisphere, it becomes low in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 11 14.42 31 23.1 1.494 2.186 120 18.0 21:09 ( 0, 86)
Apr. 30 11 12.28 29 16.0 1.531 2.166 115 17.9 20:39 ( 0, 84)
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Now it is 17.9 mag (Apr. 17, W. Hasubick). It is expected to brighten up to 12-13 mag from 2024 to 2025.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 9 59.80 -26 22.8 7.430 8.006 121 17.9 20:09 ( 4, 28)
Apr. 30 9 57.43 -25 29.5 7.465 7.961 116 17.9 20:17 ( 13, 28)
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Now it is 17.2 mag (Apr. 11, ATLAS Chile). Very far object. It stays 18 mag for a long time from 2021 to 2026. In the Southern Hemisphere, it stays observable in good condition for a long time. In the Northern Hemisphere, it is not observable at all.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 23 7 27.47 -64 41.9 10.575 10.754 97 17.9 20:09 ( 17,-15)
Apr. 30 7 26.82 -64 13.6 10.579 10.743 96 17.9 20:17 ( 21,-17)
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