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It brightened up to 15.1 mag in February (Feb. 1, Ken-ichi Kadota). It is expected to brighten up to 4.5 mag in April. However, it is not observable now. In the Northern Hemisphere, it will appear at 6 mag in mid May, 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. 9 1 43.87 -1 7.8 1.396 0.466 12 7.4 19:54 (101,-16)
Apr. 16 2 22.56 -0 2.5 1.160 0.329 15 5.5 20:01 (101,-15)
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Brightened very rapidly. Now it is very bright as 9.3 mag (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. 9 1 12.10 23 15.2 1.921 0.996 15 9.4 19:54 (125, -7)
Apr. 16 1 27.98 19 46.1 1.981 1.008 9 9.6 3:58 (237,-10)
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It has not been observed yet in this apparition. It will brighten very rapidly 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. 9 0 56.52 4 13.0 1.646 0.652 4 11.0 4:09 (252,-17)
Apr. 16 1 38.25 8 42.4 1.594 0.591 1 10.0 20:01 (115,-18)
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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. 9 18 55.12 11 43.0 3.330 3.510 91 10.2 4:09 (310, 58)
Apr. 16 18 55.04 11 46.7 3.167 3.447 97 10.1 3:58 (316, 60)
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Now it is 10.1 mag (Apr. 6, Osamu Miyazaki). 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. 9 6 47.20 15 34.5 3.636 3.647 82 10.2 19:54 ( 66, 54)
Apr. 16 6 51.88 14 40.7 3.752 3.661 77 10.3 20:01 ( 72, 47)
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Now it is 11.3 mag (Apr. 2, 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. 9 21 58.67 -12 7.8 1.986 1.568 51 10.9 4:09 (291, 9)
Apr. 16 22 18.07 -10 38.9 1.962 1.580 53 10.9 3:58 (290, 9)
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Now it is bright as 10.0 mag (Apr. 6, Osamu Miyazaki). It will be fading after this. 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. 9 4 52.98 39 5.8 1.768 1.521 59 11.3 19:54 (114, 41)
Apr. 16 5 19.53 40 41.1 1.841 1.562 58 11.6 20:01 (117, 40)
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Now it is bright as 11.6 mag (Apr. 5, Chris Wyatt). It stays 11-12 mag until July. It stas observable in good condition for a long time. It locates high after this also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 11 48.59 -19 40.0 3.334 4.273 156 11.5 22:38 ( 0, 35)
Apr. 16 11 46.60 -18 3.3 3.351 4.266 152 11.5 22:08 ( 0, 37)
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Now it is very bright as 10.6 mag (Apr. 2, Thomas Lehmann). 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. 9 20 58.87 -29 37.6 2.047 1.957 70 12.5 4:09 (314, 7)
Apr. 16 21 8.08 -33 15.5 1.886 1.921 76 12.2 3:58 (317, 5)
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Now it is 14.4 mag (Apr. 1, Hiroshi Abe). It stays 12-13 mag for a while. But actually, it is fainter than this ephemeris recently. 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. 9 20 40.22 -22 16.5 1.568 1.582 72 12.2 4:09 (312, 15)
Apr. 16 20 59.29 -21 55.1 1.536 1.598 74 12.3 3:58 (311, 15)
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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 will be observable soon also in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 20 53.55 -36 1.9 1.889 1.878 73 12.6 4:09 (319, 3)
Apr. 16 20 42.77 -36 37.9 1.837 1.979 82 12.8 3:58 (323, 6)
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Now it is 14.4 mag (Apr. 5, 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. 9 6 53.27 -59 26.3 2.970 3.204 94 13.4 19:54 ( 16, -8)
Apr. 16 6 43.30 -56 42.1 3.006 3.191 91 13.4 20:01 ( 23, -9)
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Now it is 13.1 mag (Mar. 24, Mitsunori Tsumura). 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. 9 9 26.25 18 32.9 1.643 2.303 119 13.6 20:16 ( 0, 73)
Apr. 16 9 29.10 18 1.7 1.701 2.289 113 13.6 20:01 ( 8, 73)
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Now it is 14.4 mag (Mar. 28, Thomas Lehmann). 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. 9 16 2.85 41 52.3 4.248 4.784 116 13.8 2:56 (180, 83)
Apr. 16 15 52.04 42 39.1 4.180 4.746 118 13.8 2:17 (180, 82)
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Now it is 13.9 mag (Mar. 24, Thomas Lehmann). 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. 9 11 10.47 61 24.5 4.305 4.703 107 13.9 21:59 (180, 64)
Apr. 16 10 55.71 61 32.1 4.331 4.645 102 13.9 21:17 (180, 64)
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Now it is 13.6 mag (Mar. 21, Thomas Lehmann). 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. 9 1 50.75 57 18.3 2.516 2.033 50 14.1 19:54 (147, 20)
Apr. 16 2 18.80 58 12.3 2.457 1.952 48 13.9 20:01 (148, 20)
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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. 9 4 41.10 29 2.7 6.505 5.974 54 13.9 19:54 (104, 35)
Apr. 16 4 46.06 29 3.2 6.594 5.976 48 13.9 20:01 (107, 29)
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Now it is 14.8 mag (Mar. 22, Thomas Lehmann). It will brighten up to 13 mag in summer.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 18 53.19 -26 50.4 2.786 3.072 96 14.0 4:09 (336, 24)
Apr. 16 18 58.50 -27 5.4 2.688 3.067 102 13.9 3:58 (339, 25)
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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. 9 22 48.39 -54 5.6 3.594 3.354 68 14.0 4:09 (320,-24)
Apr. 16 22 48.87 -54 19.8 3.471 3.323 73 13.9 3:58 (322,-22)
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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. 9 8 51.08 22 25.8 1.593 2.154 110 14.2 19:54 ( 13, 77)
Apr. 16 8 58.69 21 35.3 1.722 2.209 105 14.6 20:01 ( 35, 74)
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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. 9 7 25.52 15 31.5 1.148 1.548 91 14.4 19:54 ( 54, 61)
Apr. 16 7 47.79 15 12.6 1.248 1.607 90 15.1 20:01 ( 58, 58)
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Now it is 14.5 mag (Mar. 31, D. Buczynski). 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. 9 19 2.79 18 23.9 4.714 4.806 89 14.5 4:09 (298, 61)
Apr. 16 19 2.47 18 36.2 4.575 4.759 94 14.4 3:58 (304, 64)
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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. 9 13 10.96 27 47.6 3.803 4.657 144 14.7 0:05 ( 0, 83)
Apr. 16 13 0.76 28 59.5 3.884 4.699 140 14.8 23:22 ( 0, 84)
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Now it is 15.9 mag (Apr. 2, Thomas Lehmann). 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. 9 17 4.79 -43 52.7 4.599 5.136 117 14.9 3:58 ( 0, 11)
Apr. 16 16 57.87 -45 6.6 4.517 5.149 124 14.9 3:24 ( 0, 10)
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Now it is 16.3 mag (Apr. 2, Hirohisa Sato). 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. 9 9 43.93 31 40.5 1.322 1.992 117 15.2 20:34 ( 0, 87)
Apr. 16 9 40.41 31 7.5 1.335 1.929 110 15.0 20:03 ( 0, 86)
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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. 9 10 59.00 7 11.9 2.897 3.757 144 15.3 21:48 ( 0, 62)
Apr. 16 10 50.12 6 28.5 3.013 3.796 135 15.4 21:12 ( 0, 61)
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Now it is 15.3 mag (Mar. 9, Ken-ichi Kadota). 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. 9 10 22.92 -1 56.3 1.658 2.496 138 15.5 21:13 ( 0, 53)
Apr. 16 10 26.69 0 27.3 1.737 2.521 131 15.6 20:49 ( 0, 55)
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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. 9 1 52.55 -6 39.2 2.465 1.541 17 15.8 19:54 ( 95,-18)
Apr. 16 2 0.11 -8 11.6 2.394 1.483 19 15.6 20:01 ( 98,-25)
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Now it is 16.1 mag (Mar. 21, D. Buczynski). 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. 9 20 13.21 8 11.3 4.054 3.886 73 15.9 4:09 (293, 42)
Apr. 16 20 14.19 9 41.7 3.877 3.813 78 15.8 3:58 (295, 45)
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Now it is 15.3 mag (Apr. 2, D. Buczynski). 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. 9 16 17.33 32 29.8 4.357 4.937 120 15.8 3:10 ( 0, 87)
Apr. 16 16 14.69 34 15.8 4.350 4.953 121 15.8 2:40 ( 0, 89)
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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. 9 7 10.85 14 44.5 2.384 2.560 88 16.0 19:54 ( 58, 58)
Apr. 16 7 19.87 14 50.9 2.514 2.604 83 16.2 20:01 ( 66, 53)
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Now it is 19.2 mag (Mar. 28, Slooh.com Chile Observatory). It was expected to be observable at 16 mag in good condition in spring. But actually, it is fainter than predicted by 3 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 19 43.73 -24 28.7 1.115 1.437 85 16.1 4:09 (324, 21)
Apr. 16 20 2.25 -21 49.3 1.085 1.445 87 16.1 3:58 (322, 23)
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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 faded down to 12.7 mag in autumn (Nov. 22, Thomas Lehmann). In the Southern Hemisphere, it is appearing in the morning sky. In the Northern Hemisphere, it is not observable until June when the comet will fade down to 17 mag.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 22 26.06 -30 42.8 4.157 3.669 54 16.1 4:09 (302, -8)
Apr. 16 22 34.48 -30 41.9 4.136 3.727 59 16.3 3:58 (303, -6)
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Now it is 17.0 mag (Mar. 22, Thomas Lehmann). It will brighten up to 11.5 mag in 2022 winter. It stays observable while the comet will be brightening slowly.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 4 3.90 18 28.4 3.355 2.722 43 16.4 19:54 ( 97, 23)
Apr. 16 4 14.16 19 1.0 3.380 2.681 39 16.3 20:01 (101, 18)
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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. 9 13 8.22 45 32.9 2.393 3.101 127 16.3 0:03 (180, 80)
Apr. 16 12 43.20 45 11.3 2.480 3.149 123 16.5 23:03 (180, 80)
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Now it is 16.1 mag (Apr. 2, Masayoshi Yoshimi). 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. 9 11 23.60 14 0.8 1.462 2.361 146 16.4 22:13 ( 0, 69)
Apr. 16 11 22.27 13 58.4 1.537 2.388 139 16.6 21:44 ( 0, 69)
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Now it is 16.6 mag (Mar. 25, W. Hasubick). 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. 9 18 47.26 14 27.5 5.004 5.163 93 16.6 4:09 (310, 61)
Apr. 16 18 47.50 16 1.9 4.936 5.181 98 16.6 3:58 (314, 65)
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First return of a new periodic comet observed at 16 mag from 2003 to 2004. Now it is 16.3 mag (Mar. 25, F. Kugel, J.-G. Bosch, J. Nicolas). 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. 9 6 20.75 15 28.1 4.109 3.993 76 16.6 19:54 ( 72, 49)
Apr. 16 6 26.32 16 5.2 4.215 4.000 70 16.6 20:01 ( 79, 43)
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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. 9 23 26.13 -17 34.0 4.297 3.532 35 16.6 4:09 (283,-12)
Apr. 16 23 34.72 -16 55.0 4.258 3.550 40 16.6 3:58 (284,-10)
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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. 9 19 35.03 -21 54.6 3.020 3.129 86 16.7 4:09 (325, 24)
Apr. 16 19 41.22 -21 56.5 2.930 3.135 92 16.6 3:58 (327, 26)
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Now it is 17.1 mag (Apr. 2, D. Buczynski). It will brighten up to 14 mag in early 2023. It becomes unobservable temporarily in May. But it will appear in the morning sky again in August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 4 48.87 11 34.9 4.891 4.381 54 16.7 19:54 ( 85, 28)
Apr. 16 4 55.08 12 11.7 4.933 4.342 49 16.6 20:01 ( 89, 23)
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Now it is 16.6 mag (Apr. 2, Hidetaka Sato). 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. 9 19 25.73 -69 8.5 1.158 1.601 95 16.9 4:09 (348,-17)
Apr. 16 20 20.30 -78 54.6 1.141 1.616 97 16.9 3:58 (352,-26)
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Now it is 16.9 mag (Mar. 22, F. Kugel, J.-G. Bosch, J. Nicolas). 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. 9 14 7.45 0 26.2 7.870 8.835 163 16.9 1:01 ( 0, 55)
Apr. 16 14 2.83 0 59.3 7.852 8.833 167 16.9 0:29 ( 0, 56)
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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 17.0 mag (Mar. 30, D. Buczynski). It will be fainter than 18 mag in May.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 8 4.54 12 16.2 2.278 2.669 101 16.9 19:54 ( 34, 64)
Apr. 16 8 10.26 11 56.5 2.381 2.685 96 17.1 20:01 ( 46, 59)
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Now it is 16.7 mag (Mar. 25, F. Kugel, J.-G. Bosch, J. Nicolas). It stays 17 mag for a while.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 13 28.50 -8 42.7 3.708 4.706 175 17.0 0:22 ( 0, 46)
Apr. 16 13 24.99 -8 26.6 3.704 4.706 177 17.0 23:46 ( 0, 46)
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Now it is 16.7 mag (Apr. 3, 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. 9 19 24.68 58 55.5 9.203 9.113 81 17.0 4:09 (211, 58)
Apr. 16 19 23.87 60 0.0 9.194 9.124 82 17.0 3:58 (207, 59)
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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. 9 6 41.72 -43 21.0 5.347 5.441 90 17.0 19:54 ( 25, 5)
Apr. 16 6 40.50 -42 47.4 5.412 5.451 86 17.1 20:01 ( 31, 2)
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Now it is 16.9 mag (Mar. 31, 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. 9 7 11.29 -27 26.0 8.027 8.155 93 17.1 19:54 ( 27, 22)
Apr. 16 7 12.83 -26 54.9 8.063 8.118 89 17.1 20:01 ( 34, 19)
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Now it is 17.6 mag (Apr. 3, A. Diepvens). 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. 9 0 8.74 75 7.5 4.013 3.760 68 17.4 4:09 (197, 30)
Apr. 16 0 13.37 75 27.1 4.043 3.757 66 17.4 3:58 (197, 31)
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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. 4, 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. 9 16 33.91 66 51.4 6.619 6.819 97 17.4 3:26 (180, 58)
Apr. 16 16 22.38 67 50.0 6.667 6.857 96 17.5 2:47 (180, 57)
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Now it is 17.8 mag (Apr. 2, Masayoshi Yoshimi). 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. 9 12 3.07 70 25.4 6.930 7.195 101 17.5 22:52 (180, 55)
Apr. 16 11 55.10 69 42.9 6.993 7.210 98 17.6 22:17 (180, 55)
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Now it is 17.7 mag (Apr. 3, Catalina Sky Survey). 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. 9 10 54.01 -6 10.7 3.195 4.067 146 17.6 21:43 ( 0, 49)
Apr. 16 10 47.61 -4 15.2 3.200 4.003 138 17.5 21:09 ( 0, 51)
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Now it is 17.6 mag (Mar. 28, 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. 9 9 42.85 -16 25.7 3.625 4.323 128 17.7 20:32 ( 0, 38)
Apr. 16 9 39.78 -16 24.7 3.659 4.282 122 17.6 20:02 ( 0, 38)
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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. 9 22 23.94 -7 54.7 3.200 2.575 43 17.7 4:09 (284, 6)
Apr. 16 22 35.71 -6 52.6 3.113 2.549 47 17.6 3:58 (284, 8)
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Now it is 16.7 mag (Mar. 25, F. Kugel, J.-G. Bosch, J. Nicolas). 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. 9 6 19.70 -15 24.6 5.046 4.973 80 17.7 19:54 ( 45, 26)
Apr. 16 6 18.11 -14 32.0 5.105 4.928 74 17.7 20:01 ( 53, 21)
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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. 9 14 54.03 -42 14.3 5.367 6.150 138 17.7 1:48 ( 0, 13)
Apr. 16 14 44.88 -42 27.2 5.343 6.184 144 17.7 1:11 ( 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. 9 22 21.36 15 17.2 7.288 6.577 41 17.8 4:09 (265, 20)
Apr. 16 22 23.21 15 19.1 7.240 6.598 47 17.8 3:58 (267, 23)
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Now it is 17.8 mag (Mar. 2, Toshihiko Ikemura, Hirohisa Sato). 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. 9 14 23.55 47 20.3 7.533 8.120 122 17.8 1:16 (180, 78)
Apr. 16 14 18.22 47 23.5 7.592 8.167 121 17.8 0:44 (180, 78)
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Now it is 18.0 mag (Apr. 2, Catalina Sky Survey). It continued brightening for a while even after the perihelion passage. But it will be fading after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 4 56.39 1 3.9 4.640 4.178 56 17.8 19:54 ( 74, 23)
Apr. 16 5 2.49 1 52.5 4.738 4.197 52 17.8 20:01 ( 79, 18)
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It brightened very rapidly, and brightened up to 8.9 mag (Sept. 11, Chris Wyatt). Now it is fading. It has already faded down to 19 mag (Mar. 19, WISE). In the Southern Hemisphere, it stays observable after this while the comet will be fading. It is not observable after this in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 17 53.94 -57 11.1 2.544 2.985 106 17.8 4:09 (355, -3)
Apr. 16 17 47.31 -57 23.0 2.518 3.049 112 18.0 3:58 (358, -2)
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Now it is 17.4 mag (Mar. 30, D. Buczynski). It is observable in good condition in the Northern Hemisphere, but it locates low in the Southern Hemisphere. It will be fainter than 18 mag soon.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
Apr. 9 6 24.27 33 0.0 2.485 2.453 76 17.9 19:54 ( 98, 57)
Apr. 16 6 36.44 33 0.1 2.564 2.454 72 17.9 20:01 (100, 53)
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Now it is 17.5 mag (Mar. 31, J. McCormick). 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. 9 10 5.95 -28 9.0 7.388 8.093 132 17.9 20:55 ( 0, 27)
Apr. 16 10 2.65 -27 16.3 7.403 8.048 127 17.9 20:25 ( 0, 28)
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Now it is 17.1 mag (Apr. 3, 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. 9 7 31.02 -65 41.0 10.574 10.775 98 17.9 19:54 ( 10,-12)
Apr. 16 7 28.85 -65 11.3 10.573 10.764 98 17.9 20:01 ( 14,-13)
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