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New bright comet discovered in the very low sky in the evening. It had been locating high in the evening sky in the Northern Hemisphere from last autumn to early March, while the comet brightened to 9.5 mag, however, it was not discovered. It approached to the Sun down to 0.17 AU on Apr. 18. During several days around the perihelion passage, it is visible in the SOHO LASCO field. In the Northern Hemisphere, it appears at dawn at 7 mag in late April. It will be a good target for visual observation in May. It passes very close by C/2003 T3 ( Tabur ) on Apr. 25.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 2 8.90 -1 19.2 1.123 0.324 16 4.5 12.7 3.4 19:06 ( 87, -2)
Apr. 17 1 48.00 5 43.3 0.856 0.169 5 1.8 185.2 322.8 18:57 ( 88,-15)
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Appearing at dawn. It was observed at 4.6 mag on Apr. 9. In the Southern Hemisphere, it is best opportunity to see the comet in the morning until mid May. In the Northern Hemisphere, it locates extremely low sky at dawn until early May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 23 53.29 7 7.0 1.520 0.677 20 4.1 13.2 199.2 4:55 (262, -1)
Apr. 17 23 52.18 5 29.0 1.317 0.629 27 3.6 15.7 178.3 5:00 (258, 7)
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It will be 2 mag in May. In the Southern Hemisphere, it keeps observable in the south-western sky at dusk. In the Northern Hemisphere, it is not observable until May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 1 49.14 -66 2.7 0.889 1.145 74 4.8 45.1 89.6 19:06 ( 27, 29)
Apr. 17 2 53.91 -65 12.0 0.698 1.085 76 4.1 73.4 77.7 18:57 ( 30, 33)
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In the Northern Hemisphere, it will appear at dawn soon. Because brightness evolution before the perihelion passage was very slow, it can be fainter than this ephemeris. Then it keeps low until autumn. It passes very close by a new comet C/2004 F4 ( Bradfield ) on Apr. 25.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 0 23.96 17 12.0 2.446 1.505 15 9.6 48.1 41.9 4:55 (258,-13)
Apr. 17 0 40.21 21 24.4 2.410 1.490 18 9.5 49.4 42.6 5:00 (252,-12)
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Although it was so faint as 14.6 mag in late February, it brightened rapidly in late March. Now it is 10-11 mag visually. It is observable in good condition in the Southern Hemisphere. But in the Northern Hemisphere, it keeps locating lower than 15 deg until June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 22 0.13 -15 15.3 1.698 1.368 53 10.8 51.4 72.1 4:55 (264, 35)
Apr. 17 22 23.41 -13 21.0 1.679 1.368 54 10.8 50.6 70.8 5:00 (261, 36)
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The condition is worst in this return. It is not observable around the perihelion passage. It will appear at dawn in autumn, when it will already fade to 15 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 0 24.62 8 2.9 2.121 1.163 12 11.9 60.1 72.6 4:55 (266, -8)
Apr. 17 0 52.23 10 6.4 2.085 1.123 12 11.6 61.9 73.6 5:00 (263, -8)
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Well condensed and easy to see. It will be 6.5 mag in the southern sky from autumn to winter in 2004. In the Northern Hemisphere, it is observable in good condition until early September when it becomes to 7.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 20 15.08 24 52.8 3.040 2.912 73 12.1 14.1 356.8 4:55 (211, 23)
Apr. 17 20 14.05 26 37.3 2.864 2.832 78 11.8 16.1 348.3 5:00 (203, 25)
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It is diffused around 11.5 mag visually. It will be lower and fainter gradually in the evening sky after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 9 19.27 -19 25.5 1.614 2.305 121 12.4 49.8 294.2 20:01 (180, 74)
Apr. 17 8 59.69 -17 9.1 1.759 2.325 111 12.6 39.1 297.7 19:15 (180, 72)
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It will be lower and lower while fading after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 4 26.43 16 33.2 2.094 1.596 47 12.8 43.5 90.7 19:06 (122, 14)
Apr. 17 4 47.58 16 25.3 2.141 1.608 45 12.9 43.4 92.0 18:57 (123, 15)
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Not observable. It will appear at dawn in May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 23 45.21 4 18.7 6.636 5.725 22 13.8 12.1 63.0 4:55 (263, 2)
Apr. 17 23 50.19 4 57.1 6.592 5.725 28 13.8 11.8 62.5 5:00 (258, 8)
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Not yet recovered in this return. At the previous appearance, it brightened after the perihelion passage and reached to 10 mag. If it has behaved so again, it could have reach to 13 mag in February and March. However, it must be much fainter actually than expected. It will be unobservable soon.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 3 5.23 8 6.1 2.567 1.738 27 14.1 42.1 74.7 19:06 (103, 4)
Apr. 17 3 24.16 9 19.6 2.638 1.784 25 14.4 40.8 75.8 18:57 (104, 4)
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Not observable. It will appear at dawn again at 15 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 0 49.69 12 15.4 4.904 3.913 7 14.4 5.3 44.0 4:55 (266,-15)
Apr. 17 0 51.40 12 42.3 4.934 3.960 12 14.5 5.2 41.7 5:00 (261, -9)
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It became brighter than expected after the perihelion passage, and it was observed visually around 13.5 mag in February and March. After this, it will be fading.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 12 59.81 9 10.6 1.357 2.332 162 14.8 13.9 251.6 23:42 (180, 46)
Apr. 17 12 53.87 8 35.5 1.395 2.354 157 14.9 13.1 244.6 23:09 (180, 46)
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The brightness evolution is gradual in this return. So it will reach to 15 mag at best.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 16 6.73 0 9.7 1.109 1.961 136 14.9 5.7 5.2 2:53 (180, 55)
Apr. 17 16 6.12 0 46.9 1.099 1.990 142 15.0 5.7 328.1 2:25 (180, 54)
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Althouhg it must be fainter than 17 mag now, it unexpectedly brightened from February to March and reached to 14.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 11 33.38 9 27.6 1.885 2.793 149 15.3 7.5 300.7 22:16 (180, 46)
Apr. 17 11 30.83 9 49.7 1.965 2.823 141 15.5 5.0 300.0 21:46 (180, 45)
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It is expected to be as bright as 15.5 mag, however, no observations have been reported recently.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 19 28.04 -19 8.6 2.194 2.406 89 15.7 12.7 80.1 4:55 (233, 66)
Apr. 17 19 33.59 -18 54.3 2.144 2.448 95 15.8 10.2 79.3 5:00 (219, 70)
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It is expected to be 5 mag in 2005 spring. Until that time, it keeps observable in the Northern Hemisphere, which the comet will be getting brighter gradually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 4 47.54 70 49.3 5.083 4.849 70 15.9 6.3 131.8 19:06 (163,-22)
Apr. 17 4 54.80 70 21.8 5.081 4.779 66 15.8 6.7 122.7 18:57 (162,-23)
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It will be fading slowly until November when it becomes fainter than 18 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 19 13.04 31 15.0 5.895 5.916 86 16.9 12.2 12.3 4:55 (195, 22)
Apr. 17 19 14.16 32 38.5 5.861 5.945 89 16.9 12.0 7.1 5:00 (187, 22)
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It keeps 17 mag until July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 16 26.03 51 49.6 5.529 5.910 107 16.9 16.4 310.4 3:13 (180, 3)
Apr. 17 16 15.94 52 59.6 5.528 5.923 108 16.9 16.6 304.3 2:35 (180, 2)
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It will be observable at 17.5 mag in good condition until August.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 18 26.83 10 9.7 2.946 3.279 100 17.1 9.0 60.2 4:55 (186, 45)
Apr. 17 18 30.09 10 40.1 2.879 3.288 105 17.1 7.2 54.7 4:49 (180, 44)
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Not yet observed in this return, but it must be brightening in the morning sky. It will reach to 15 mag in summer.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 19 33.28 -14 50.7 2.456 2.616 87 17.2 17.6 85.3 4:55 (228, 62)
Apr. 17 19 41.45 -14 41.0 2.349 2.596 92 17.1 16.3 85.5 5:00 (217, 66)
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It will become fainter than 18 mag, and too low to observe in June. It was about 0.5 mag brighter than this ephemeris around the opposition from December to February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 7 58.16 25 3.9 4.028 4.254 96 17.3 6.3 70.5 19:06 (174, 30)
Apr. 17 8 1.54 25 16.8 4.149 4.269 90 17.4 7.4 77.5 18:57 (170, 29)
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It was observed around 17.5 mag recently. It will be fainter than 18 mag in late May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 13 40.12 7 35.3 6.001 6.966 163 17.4 9.6 269.2 0:27 (180, 47)
Apr. 17 13 35.62 7 33.0 6.051 7.012 161 17.5 9.5 267.0 23:51 (180, 47)
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Fading slowly. It will be observable in good condition until May when it will be fainter than 18 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 9 28.26 45 12.7 4.390 4.772 106 17.6 7.1 184.7 20:12 (180, 10)
Apr. 17 9 28.31 44 22.0 4.542 4.833 100 17.7 7.4 174.2 19:45 (180, 11)
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It will be observable around 17.5 mag until June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 18 18.38 -7 28.4 4.198 4.562 105 17.7 4.6 200.6 4:55 (185, 62)
Apr. 17 18 17.22 -7 59.9 4.115 4.587 111 17.7 5.8 215.2 4:36 (180, 63)
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It was brighter than this ephemeris recently, around 17.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Apr. 10 11 44.27 12 21.4 3.160 4.055 149 18.2 8.1 280.2 22:27 (180, 43)
Apr. 17 11 40.74 12 28.7 3.199 4.040 142 18.2 6.8 275.3 21:56 (180, 43)
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