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It brightened up to 4.0 mag in late April (Apr. 30, Chris Wyatt). It brightened up to 1.3 mag due to the forward scattering in the SOHO LASCO images (Apr. 25, Mikolaj Kaszczyk). Now it is 6.6 mag (May 17, Mike Olason). Fading rapidly. In the Northern Hemisphere, it is not observable now, but it will appear in September. It locates somewhat low in the Southern Hemisphere. But it will become high in autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 6 18.06 -9 55.8 1.237 0.903 45 7.7 18:28 ( 97, 28)
May 30 6 31.87 -10 25.4 1.458 1.023 44 8.7 18:26 ( 95, 25)
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Now it is 10.9 mag (May 15, Ken Harikae). Fading gradually. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 0 43.54 1 1.5 1.947 1.532 51 10.3 5:24 (243, 31)
May 30 1 0.13 2 45.0 1.942 1.567 53 10.5 5:28 (238, 33)
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It is expected to brighten up to 8 mag in summer. Now it is 13.1 mag (May 13, Osamu Miyazaki). Brightening rapidly. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 19 53.70 -8 7.7 0.813 1.598 121 11.3 3:53 (180, 63)
May 30 20 6.73 -8 9.8 0.745 1.567 125 10.8 3:38 (180, 63)
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It will brighten up to 12 mag in summer. It stays 12 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in June. It stays extremely low in the Southern Hemisphere. But it will become high in autumn.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 2 30.42 14 54.0 2.931 2.023 21 12.6 5:24 (250, 2)
May 30 2 47.08 15 57.6 2.899 2.016 24 12.5 5:28 (247, 4)
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The condition is very bad in this apparition. It is not observable at all. It will fade out rapidly after this. It will be fainter than 18 mag in July. It will never be observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 4 42.86 19 42.4 1.917 0.940 10 12.9 18:28 (108, -9)
May 30 5 16.75 19 29.0 1.968 1.000 12 13.2 18:26 (109, -7)
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Now it is 13.0 mag (May 19, Osamu Miyazaki). Fading slowly. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 18 24.00 -5 17.6 2.741 3.588 141 13.4 2:24 (180, 60)
May 30 18 8.44 -5 50.8 2.677 3.595 150 13.4 1:41 (180, 61)
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Now it is 13.9 mag (Mar. 12, ATLAS South Africa). Brightening slowly. In the Northern Hemisphere, it is not observable now, but it will appear in August. In the Southern Hemisphere, it will be getting higher gradually. It is expected to brighten up to 11 mag in next winter.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 4 1.81 -17 32.5 5.626 4.868 38 13.9 18:28 ( 72, 4)
May 30 4 8.81 -16 48.8 5.582 4.833 38 13.8 5:28 (285, 7)
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Now it is 14.1 mag (May 19, Toru Yusa). It stays 14 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 20 20.91 26 11.7 3.879 4.191 100 13.9 4:20 (180, 29)
May 30 20 18.19 28 21.1 3.791 4.168 104 13.8 3:50 (180, 27)
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Now it is 13.0 mag (May 17, Yoshiaki Yamaguchi). It will be getting lower gradually after this, and it will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 10 59.39 -0 51.9 5.981 6.315 104 13.9 18:56 (180, 56)
May 30 11 0.23 -0 52.7 6.090 6.315 98 13.9 18:29 (180, 56)
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It became brighter than expected. Now it is 14.3 mag (May 19, Toru Yusa). It will fade out rapidly after this. It will be fainter than 18 mag in August. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 17 4.72 -9 38.4 1.318 2.297 160 14.2 1:05 (180, 65)
May 30 16 59.36 -9 3.0 1.329 2.323 165 14.4 0:32 (180, 64)
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It brightened up to 8.4 mag in January (Jan. 14, Mitsunori Tsumura). Now it is 13.7 mag (May 19, Toru Yusa). Fading rapidly. It will be fainter than 18 mag in July. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 14 20.34 -2 3.9 1.080 2.021 149 14.6 22:16 (180, 57)
May 30 14 17.30 -3 13.0 1.175 2.081 143 15.0 21:46 (180, 58)
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Very large comet. It is expected to brighten up to 13 mag in 2031. Now it is 14.5 mag (Apr. 25, Andrew Pearce). It stays 15 mag for a while. In the Northern Hemisphere, it is not observable now. In the Southern Hemisphere, it stays observable in good condition. In the Northern Hemisphere, it is not observable until 2030.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 5 37.89 -68 20.2 13.912 13.961 90 14.7 18:28 ( 27, 38)
May 30 5 44.53 -68 11.6 13.884 13.939 91 14.7 18:26 ( 27, 36)
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Now it is 14.7 mag (May 13, Katsumi Yoshimoto). It stays 15 mag for a while. It will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 8 25.50 28 13.0 2.313 2.022 60 15.1 18:28 (151, 20)
May 30 8 40.38 26 20.4 2.358 2.008 57 15.0 18:26 (148, 21)
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Now it is 15.2 mag (May 18, Toru Yusa). It stays 15 mag for a while. It will be unobservable in July in the Southern Hemisphere, or in August in the Northern Hemisphere. But it will be observable again in September in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 9 19.09 31 34.5 6.021 5.781 71 15.0 18:28 (164, 21)
May 30 9 23.49 31 22.7 6.135 5.797 66 15.1 18:26 (159, 20)
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Now it is 15.3 mag (May 17, Toru Yusa). It stays 16 mag for a while. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 17 21.05 14 18.6 6.005 6.808 139 15.2 1:21 (180, 41)
May 30 17 18.38 14 49.0 6.022 6.842 141 15.2 0:50 (180, 40)
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Now it is 15.8 mag (May 7, Ken-ichi Kadota). It stays 16 mag for a while. Now it is not observable. It will appear in July in the Northern Hemisphere, or in August in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 5 14.07 26 49.0 5.549 4.601 18 15.3 18:28 (118, -7)
May 30 5 22.72 26 54.1 5.611 4.634 13 15.4 18:26 (116,-10)
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Now it is 15.5 mag (May 22, ATLAS-MLO, Mauna Loa). It stays 15 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It stays extremely low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 22 14.18 37 18.9 6.242 6.052 74 15.5 5:24 (190, 17)
May 30 22 12.86 38 37.8 6.125 6.016 79 15.4 5:28 (183, 16)
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Now it is 16.0 mag (Jan. 18, Kunihiro Shima). Fading slowly. Now it is not observable. It will appear in August in the Northern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 4 2.61 28 30.1 2.698 1.701 8 15.6 18:28 (111,-21)
May 30 4 25.03 29 25.2 2.711 1.712 7 15.7 5:28 (248,-22)
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It will brighten up to 13 mag and will be observable in good condition from summer to autumn. Now it is 16.9 mag (May 4, ATLAS South Africa). It will brighten rapidly after this. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 23 50.39 -8 59.6 1.729 1.636 67 16.1 5:24 (241, 48)
May 30 0 8.42 -6 15.7 1.654 1.600 68 15.7 5:28 (234, 48)
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It will brighten up to 15 mag from autumn to winter. Now it is 16.8 mag (Apr. 16, Erik Bryssinck). It stays 15 mag for a while. In the Northern Hemisphere, it will be unobservable in June. But it will be observable again in September. In the Southern Hemisphere, it is not observable now.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 6 12.69 33 20.5 3.142 2.353 32 15.9 18:28 (131, -1)
May 30 6 28.85 33 16.7 3.161 2.332 29 15.8 18:26 (130, -2)
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It brightened up to 3.7 mag in late October (Oct. 26, Juan Jose Gonzalez). Now it is 16.0 mag (May 19, Andrew Pearce). It will fade out rapidly after this. It will be fainter than 18 mag in July. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 10 48.51 -42 7.1 2.717 3.246 112 15.9 18:45 ( 0, 83)
May 30 10 46.95 -39 49.8 2.883 3.332 107 16.3 18:26 ( 22, 85)
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First return of a new periodic comet which brightened up to 17 mag in 2021. It will approach to Earth down to 0.17 a.u. from June to July. It is expected to brighten up to 14 mag. Brightening gradually. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 19 12.53 -51 25.4 0.417 1.325 131 16.8 3:11 ( 0, 74)
May 30 19 53.66 -51 58.0 0.347 1.266 130 16.2 3:24 ( 0, 73)
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Now it is 16.3 mag (May 19, Hirohisa Sato). It stays 16 mag for a while. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 12 41.53 4 33.8 4.920 5.573 125 16.4 20:38 (180, 51)
May 30 12 40.40 4 39.8 4.959 5.520 118 16.4 20:09 (180, 50)
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Now it is 16.4 mag (May 8, D. Buczynski). It stays 17 mag for a while. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 15 50.54 11 50.2 5.582 6.460 147 16.4 23:46 (180, 43)
May 30 15 44.70 12 37.9 5.615 6.465 144 16.5 23:13 (180, 42)
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Now it is 16.6 mag (May 7, Ken-ichi Kadota). It stays 17 mag for a while. It will be unobservable in June in the Northern Hemisphere, or in August in the Southern Hemisphere. But it will be observable again in September.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 8 42.57 3 0.9 7.066 6.810 71 16.6 18:28 (140, 44)
May 30 8 45.84 3 26.7 7.180 6.822 65 16.6 18:26 (135, 41)
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It brightened up to 11.1 mag in winter (Nov. 15, Masayoshi Yoshimi). The component B also brightened rapidly up to 13.8 mag (Ded. 8, Masayoshi Yoshimi). Now it is 17.1 mag (May 8, Alfons Diepvens). It will fade out rapidly after this. It will be fainter than 18 mag in July. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will be unobservable in June.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 6 57.75 35 54.3 3.085 2.431 42 16.9 18:28 (139, 4)
May 30 7 13.75 35 47.5 3.160 2.457 39 17.1 18:26 (138, 2)
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Now it is 16.3 mag (Apr. 5, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in June. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 23 3.65 -3 33.4 1.374 1.495 75 17.0 5:24 (221, 51)
May 30 23 15.10 -2 24.7 1.368 1.548 79 17.3 5:28 (213, 53)
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Now it is 16.9 mag (Nov. 20, Thomas Lehmann). It stays 17 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 0 11.73 -7 35.2 3.694 3.344 62 17.1 5:24 (244, 43)
May 30 0 18.61 -7 1.0 3.621 3.358 67 17.1 5:28 (238, 47)
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Now it is 17.2 mag (Mar. 12, ATLAS South Africa). It stays 17 mag for a while. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 20 22.08 4 12.6 4.475 4.925 110 17.2 4:21 (180, 51)
May 30 20 22.70 4 17.1 4.393 4.930 116 17.1 3:54 (180, 51)
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Now it is 17.0 mag (Apr. 28, ATLAS South Africa). It stays 17 mag for a while. In the Northern Hemisphere, it will never be observable after this. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 8 32.13 -64 4.0 3.847 4.136 99 17.2 18:28 ( 23, 56)
May 30 8 32.77 -63 31.9 3.861 4.121 97 17.2 18:26 ( 26, 54)
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It is expected to brighten up to 12 mag from 2027 to 2028. Now it is 17.1 mag (May 17, ATLAS-MLO, Mauna Loa). Brightening slowly. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 20 58.66 -16 47.5 5.459 5.870 109 17.4 4:58 (180, 72)
May 30 20 54.97 -16 58.5 5.290 5.819 116 17.3 4:27 (180, 72)
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Now it is 17.5 mag (Apr. 29, Alfons Diepvens). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 13 53.24 86 25.4 5.420 5.208 72 17.3 21:43 (180,-31)
May 30 13 29.24 85 0.8 5.444 5.219 71 17.3 20:55 (180,-30)
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It was observed at 12-13 mag for a long time in 2024. Now it is 17.2 mag (May 17, ATLAS-HKO, Haleakala). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. It locates somewhat low in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 23 14.74 30 54.3 6.746 6.361 63 17.3 5:24 (205, 19)
May 30 23 14.18 31 13.0 6.696 6.404 69 17.3 5:28 (198, 21)
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It will brighten up to 14 mag from autumn to winter. Now it is 17.1 mag (May 22, ATLAS-MLO, Mauna Loa). Brightening gradually. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it is not observable now.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 18 29.42 71 2.4 3.086 3.160 84 17.4 2:27 (180,-16)
May 30 18 24.31 72 56.4 3.050 3.100 83 17.3 1:55 (180,-18)
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Very far object. It stays 17 mag for a while. In the Northern Hemisphere, it is not observable now, but it will appear in July. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 0 40.99 -42 21.6 11.585 11.408 77 17.4 5:24 (296, 52)
May 30 0 42.11 -42 24.3 11.516 11.423 82 17.4 5:28 (295, 57)
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Now it is 17.0 mag (Apr. 25, Andrew Pearce). It stays 18 mag for a while. In the Northern Hemisphere, it will be unobservable in June. In the Southern Hemisphere, it will be getting lower gradually.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 8 59.63 -7 0.0 6.388 6.274 79 17.5 18:28 (138, 55)
May 30 8 59.81 -6 19.5 6.531 6.303 72 17.6 18:26 (130, 51)
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It is expected to brighten up to 12.5 mag in 2027 spring. Now it is 17.4 mag (May 10, Ken-ichi Kadota). Brightening slowly. It will be unobservable in August.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 9 12.63 23 24.8 4.140 3.949 72 17.5 18:28 (159, 29)
May 30 9 17.20 23 25.0 4.180 3.888 66 17.5 18:26 (154, 27)
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Now it is 17.5 mag (May 9, Ken-ichi Kadota). It stays 18 mag for a while. In the Northern Hemisphere, it stays observable in good condition. In the Southern Hemisphere, it will never be observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 22 15.92 65 26.3 5.334 5.070 69 17.6 5:24 (185,-11)
May 30 22 16.19 65 55.8 5.334 5.100 71 17.7 5:28 (182,-11)
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Now it is 17.4 mag (May 21, ATLAS South Africa). It stays 18 mag for a while. It stays extremely low in the Northern Hemisphere. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 9 34.02 -24 32.2 4.459 4.629 93 17.7 18:28 (126, 74)
May 30 9 38.66 -23 59.9 4.550 4.637 88 17.8 18:26 (118, 70)
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Now it is 17.5 mag (May 9, Alfons Diepvens). It stays 18 mag for a while. It locates somewhat low in the Northern Hemisphere. In the Southern Hemisphere, it will never be observable after this.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 6 49.63 63 51.5 5.422 4.865 51 17.8 18:28 (158,-18)
May 30 6 58.20 64 2.1 5.501 4.900 49 17.8 18:26 (156,-19)
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It became brighter than expected, brightened up to 14.3 mag (Jan. 21, Michael Jager). Now it is 16.9 mag (May 12, ATLAS-MLO, Mauna Loa). It will fade out rapidly after this. It will be fainter than 18 mag in June. It stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 17 51.44 -9 6.1 1.656 2.585 150 17.8 1:51 (180, 64)
May 30 17 46.13 -9 16.1 1.664 2.628 157 17.9 1:19 (180, 64)
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It will approach to Earth down to 0.17 a.u. in August. It is expected to brighten up to 10 mag from August to September. Now it is 17.7 mag (May 18, A. Maury, G. Attard, F. Signoret, D. Parrott). It will brighten rapidly after this. It will be getting lower gradually after this, and it will be unobservable in August. But it will be observable again in in the Northern Hemisphere, or in September in the Southern Hemisphere.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 19 33.57 -2 26.4 1.147 1.911 124 18.2 3:33 (180, 57)
May 30 19 35.85 -0 45.7 1.020 1.837 129 17.8 3:08 (180, 56)
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It is expected to brighten up to 4 mag in 2028 autumn. Now it is 17.3 mag (May 18, Alfons Diepvens). It stays 18 mag for a while. It will be getting lower gradually after this, and it will be unobservable in August in the Northern Hemisphere, or in September in the Southern Hemisphere. At the high light, it is observable in excellent condition in the Southern Hemisphere. In the Northern Hemisphere, it becomes observable after the perihelion passage.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 12 10.76 7 50.5 8.723 9.234 117 17.9 20:07 (180, 47)
May 30 12 8.98 7 47.2 8.778 9.182 110 17.8 19:38 (180, 47)
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Now it is 17.6 mag (May 20, ATLAS Chile). It stays 18 mag for a while. In the Northern Hemisphere, it will be getting higher gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 23 34.16 -0 53.3 1.646 1.574 67 18.0 5:24 (228, 45)
May 30 23 53.37 0 36.0 1.600 1.566 69 17.9 5:28 (224, 45)
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It had been lost for 113 years. It must have passed the perihelion on Dec. 4. It brightened up to 18 mag in outburst in 2007. Fading gradually. In the Northern Hemisphere, it will be getting lower gradually. In the Southern Hemisphere, it stays observable in good condition.
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Best Time(A, h)
May 23 12 44.66 -6 3.5 1.556 2.349 131 22.8 20:41 (180, 61)
May 30 12 46.87 -6 26.5 1.667 2.397 125 23.0 20:16 (180, 62)
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