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Good condition and visible with naked-eye in the Southern Hemisphere. In the Northern Hemisphere, it will appear in the evening low sky in late May. It seems a bit fainter than this ephemeris recently.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 0 38.35 -3 46.4 0.548 0.695 40 2.8 122.4 114.6 5:15 (258, 23)
May 15 2 16.53 -12 42.7 0.323 0.774 36 1.9 367.6 106.9 5:19 (275, 15)
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It became observable in the Northern Hemisphere, too. It is at the peak now, however, the brightening evolution since April was unexpectedly slow and it seems to be 3.5 mag at best.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 7 37.66 -11 35.9 0.323 0.972 74 3.6 342.3 24.6 18:37 (125, 52)
May 15 8 32.02 18 19.5 0.415 0.962 71 4.1 207.6 24.7 18:32 (155, 31)
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It appeared in the morning sky in late April, and it was observed as bright as 3-4 mag with a long tail as 10 deg in spite of locating very low. In the Northern Hemisphere, the comet will be higher and higher after this. Although it becomes fainter rapidly, it will be a good target for visual observation in May. Not observable in the Southern Hemisphere.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 1 1.11 39 23.5 1.252 0.705 34 7.2 41.6 10.7 5:15 (228, -9)
May 15 1 6.67 43 31.8 1.398 0.875 38 8.4 32.5 16.8 5:19 (221, -8)
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Appearing at dawn. Now it is 9.5 mag, as bright as expected. In the Northern Hemisphere, it keeps low after this until autumn. Not observable in the Southern Hemisphere.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 1 37.07 34 9.8 2.334 1.486 25 9.6 52.3 46.6 5:15 (236,-11)
May 15 1 59.67 38 16.2 2.322 1.498 27 9.6 52.7 48.9 5:19 (232,-12)
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It keeps 10-11 mag until mid May. Good condition in the Southern Hemisphere, but it locates lower than 10 deg in the Northern Hemisphere. It becomes higher after June, but the comet will be fading at that time.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 23 28.28 -7 20.9 1.639 1.396 57 10.1 46.5 68.4 5:15 (249, 39)
May 15 23 48.17 -5 21.9 1.629 1.413 59 10.2 44.8 68.0 5:19 (244, 40)
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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)
May 8 20 0.35 33 4.6 2.333 2.587 92 11.0 25.8 325.1 4:56 (180, 22)
May 15 19 50.39 35 38.9 2.163 2.504 97 10.7 30.8 318.0 4:19 (180, 19)
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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)
May 8 2 21.26 15 30.5 2.027 1.046 9 10.9 65.1 78.5 5:15 (257, -9)
May 15 2 52.47 16 51.7 2.025 1.037 8 10.8 65.3 80.7 5:19 (256,-10)
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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)
May 8 5 50.12 15 18.5 2.291 1.660 40 13.3 42.6 96.3 18:37 (122, 16)
May 15 6 10.43 14 42.0 2.344 1.682 38 13.5 42.1 97.7 18:32 (121, 15)
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Appearing at dawn. But no observations have been reported yet.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 0 4.14 6 49.2 6.403 5.724 44 13.7 10.6 60.7 5:15 (243, 23)
May 15 0 8.38 7 25.1 6.324 5.724 49 13.7 10.1 60.0 5:19 (238, 27)
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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. It keeps the same brightness still in late April.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 12 41.78 6 3.5 1.574 2.424 138 14.6 9.8 209.1 21:35 (180, 49)
May 15 12 40.17 5 0.9 1.652 2.449 132 14.8 9.5 192.7 21:06 (180, 50)
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Appearing at dawn. It will fade out gradually, and keeps observable brighter than 17 mag until the end of 2004.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 0 55.38 14 2.4 4.940 4.100 30 14.7 4.2 27.5 5:15 (246, 8)
May 15 0 56.14 14 28.1 4.915 4.148 36 14.7 3.8 18.4 5:19 (241, 14)
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Michael Jager reported as bright as 15.5 mag on Apr. 15. However, many CCD observers reported it as faint as 17-18 mag, probably because it is diffused. It will become low soon.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 4 32.06 72 13.8 1.515 1.278 56 15.0 50.1 160.4 18:37 (160,-29)
May 15 4 50.93 67 6.3 1.625 1.246 50 15.0 42.4 163.5 18:32 (154,-28)
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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 seems to go while nobody succeeded to observe it in this return.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 4 18.29 12 12.3 2.853 1.930 19 15.1 37.0 79.8 18:37 (105, 0)
May 15 4 35.44 12 54.2 2.923 1.980 17 15.4 35.8 81.2 18:32 (105, -1)
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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)
May 8 15 56.40 1 46.1 1.120 2.086 156 15.3 9.6 272.3 0:53 (180, 53)
May 15 15 51.77 1 42.5 1.147 2.120 158 15.4 10.2 261.9 0:21 (180, 53)
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It was diffused around 11.5 mag visually in February and March. But it began to fade out rapidly in April and reached to 15 mag in late April. It will become low soon.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 8 26.85 -12 13.7 2.255 2.399 85 15.4 16.7 307.2 18:37 (138, 61)
May 15 8 21.56 -11 10.8 2.424 2.429 78 15.6 12.1 311.1 18:32 (129, 56)
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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)
May 8 5 22.81 69 22.9 5.041 4.565 56 15.6 8.3 103.9 18:37 (159,-24)
May 15 5 33.97 69 10.3 5.014 4.493 53 15.5 9.0 99.9 18:32 (159,-25)
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It is observable at 15-16 mag for a long time until 2005 autumn.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 13 15.86 11 47.3 2.285 3.136 141 15.8 8.6 250.8 22:08 (180, 43)
May 15 13 12.38 11 23.0 2.325 3.121 134 15.8 7.7 237.7 21:38 (180, 44)
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In the Northern Hemisphere, it keeps fading at about 35 deg high until August 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)
May 8 19 42.38 -18 27.9 1.998 2.572 113 16.0 1.8 73.9 4:38 (180, 73)
May 15 19 42.54 -18 26.3 1.955 2.613 120 16.0 1.1 266.8 4:11 (180, 73)
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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)
May 8 19 13.79 36 39.9 5.780 6.034 99 16.9 11.1 350.3 4:10 (180, 18)
May 15 19 12.38 37 54.3 5.762 6.064 102 16.9 10.7 344.3 3:41 (180, 17)
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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)
May 8 18 34.31 11 50.3 2.700 3.320 119 17.0 2.2 359.9 3:30 (180, 43)
May 15 18 33.86 12 2.4 2.651 3.333 124 16.9 2.2 302.6 3:02 (180, 43)
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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)
May 8 15 39.89 55 22.6 5.588 5.963 107 17.0 16.3 284.6 0:37 (180, 0)
May 15 15 26.81 55 44.1 5.629 5.977 105 17.0 16.0 277.7 23:51 (180, -1)
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Althouhg it must be fainter than 17 mag, it unexpectedly brightened from February to March and reached to 14.5 mag. It has already begun to fade, and faded to 16 mag in mid April.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 11 29.43 10 2.2 2.260 2.913 121 17.1 2.5 117.0 20:23 (180, 45)
May 15 11 30.95 9 50.7 2.372 2.943 114 17.4 4.7 116.9 19:57 (180, 45)
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It brightened rapidly in the former half of 2004 and reached to 17.5 mag. It becomes low in the evening sky in June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 11 34.07 12 15.8 3.378 3.994 121 17.2 2.9 232.1 20:27 (180, 43)
May 15 11 33.35 12 0.5 3.453 3.978 114 17.2 2.6 195.2 19:59 (180, 43)
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It becomes fainter than 18 mag in June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 11 54.30 49 23.8 1.563 2.026 101 17.5 14.7 0.1 20:47 (180, 6)
May 15 11 55.31 50 53.1 1.643 2.018 96 17.6 11.2 13.9 20:21 (180, 4)
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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)
May 8 18 8.97 -9 52.4 3.908 4.664 133 17.6 10.2 233.6 3:05 (180, 65)
May 15 18 4.74 -10 36.3 3.858 4.690 141 17.6 11.6 235.9 2:33 (180, 66)
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It will be fainter than 18 mag soon.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 8 13 23.05 7 10.1 6.291 7.148 145 17.7 8.2 258.1 22:16 (180, 48)
May 15 13 19.43 6 56.8 6.399 7.193 139 17.7 7.6 254.0 21:45 (180, 48)
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