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The return of comet in 1661 with 340 year period. It had been 0.5 mag brighter than this ephemeris from mid March to mid April. But now the brightness well corresponds to this ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 17 10.69 45 57.8 0.440 1.236 110 5.8 122.9 223.4 1:59 (180, 9)
May 18 16 26.91 35 41.1 0.497 1.352 123 6.5 102.2 215.2 0:47 (180, 19)
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It brightened rapidly after early April and reached to 4.5-5.0 mag in mid April. It was also 4 mag and strongly condensed after the perihelion passage. In the Southern Hemisphere, it will be observable in May and June, but it only locates very low in the evening sky.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 4 47.00 16 44.1 1.421 0.630 23 8.0 90.2 128.9 18:35 (112, 2)
May 18 5 16.75 10 30.2 1.531 0.754 25 10.1 74.3 132.1 18:31 (108, 7)
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It suddenly bursted out in late January and reached to 2.5 mag. Then it had been fading rapidly down to 9.5 mag. But the fading became slower in April.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 18 6.78 29 3.5 1.425 2.085 116 11.0 41.2 311.6 2:54 (180, 26)
May 18 17 49.91 31 52.2 1.499 2.185 119 11.3 37.5 304.0 2:09 (180, 23)
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It keeps observable until it fades out in the Northerm Hemisphere. It keeps brighter than 12 mag until May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 19 15.82 66 16.5 1.621 1.826 84 11.2 49.4 349.7 4:02 (180,-11)
May 18 19 1.31 71 27.9 1.721 1.883 82 11.4 42.5 342.4 3:20 (180,-16)
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After it brightened rapidly and reached to 10 mag in February, it did not brightened more and kept 10 mag all over though it became closer to the earth. However, they say it suddenly faded rapidly in late April. It is moving fast towards south and will be low in the evening sky in mid June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 9 38.59 14 52.4 0.861 1.349 91 11.7 78.8 171.9 18:35 (176, 41)
May 18 9 43.92 7 4.9 1.018 1.422 88 12.3 58.2 168.7 18:31 (169, 48)
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The condition in this return is bad. It is not observable until June in the Southern Hemisphere, until August in the Northern Hemisphere.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 2 12.77 1 25.0 2.624 1.727 21 12.7 38.8 77.0 5:16 (266, 3)
May 18 2 30.12 2 23.2 2.649 1.772 23 13.1 37.4 77.8 5:21 (263, 5)
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It will be observable at 13 mag until September. It is fainter than 14 mag by CCD.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 1 30.20 75 4.9 3.960 3.545 58 12.9 22.3 32.7 5:16 (197,-30)
May 18 1 55.31 77 16.1 3.957 3.547 59 12.9 23.0 35.4 5:21 (194,-30)
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It was 14.5 mag in late March and early April. But no observations have been reported after that.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 21 8.58 -17 55.4 5.647 5.838 95 13.5 3.4 65.1 5:16 (209, 71)
May 18 21 9.83 -17 46.4 5.536 5.836 102 13.5 2.3 60.6 5:21 (186, 73)
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New comet. Although it will be observable all after this in the Northern Hemisphere, it will be fainter gradually. It is 12.5 mag visually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 18 41.93 52 11.0 1.332 1.759 96 13.6 79.9 331.4 3:29 (180, 3)
May 18 18 6.26 59 34.6 1.391 1.795 95 13.8 72.4 321.2 2:26 (180, -4)
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It will be at the peak this month. But no observation was reported recently and the current brightness is uncertain.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 21 2.72 -8 8.3 0.680 1.259 94 13.7 60.4 108.5 5:16 (197, 62)
May 18 21 29.68 -10 28.5 0.658 1.258 95 13.6 60.3 110.4 5:21 (195, 65)
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Getting higher in the morning sky. It will be 13 mag in June and July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 20 2.89 20 26.3 2.534 2.868 98 14.1 23.2 285.5 4:49 (180, 35)
May 18 19 50.41 21 6.4 2.389 2.842 106 13.9 28.3 280.7 4:09 (180, 34)
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It will be observable at around 14.5 mag in good position until September.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 16 57.25 11 0.2 4.486 5.309 141 14.3 13.6 325.8 1:44 (180, 44)
May 18 16 53.43 12 17.1 4.452 5.297 143 14.2 13.5 321.8 1:12 (180, 43)
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It will reach to 13 mag at the end of this year. In the northern hemisphere, it keeps low in the south after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 15 42.00 -40 17.4 2.009 2.962 156 15.1 11.9 260.4 0:29 ( 0, 85)
May 18 15 34.43 -40 26.2 1.939 2.906 159 14.9 12.9 267.5 23:49 ( 0, 85)
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The condition in this return is bad. We can observe it only until August before perihelion passage when it becomes to 13 mag in the evening sky.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 11 33.35 9 24.9 1.857 2.518 119 15.1 2.0 251.9 20:17 (180, 46)
May 18 11 33.13 9 15.9 1.897 2.476 113 15.0 2.2 154.4 19:49 (180, 46)
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It will be 11 mag in 2003 February. Although it was reported as 13.5 mag visually, it is fainter than this ephemeris recently, fainter than 16 mag by CCD.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 9 48.52 -3 18.0 4.670 4.946 100 15.0 9.8 306.4 18:35 (178, 58)
May 18 9 45.22 -2 39.5 4.746 4.896 92 15.0 8.1 309.6 18:31 (166, 57)
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It will be 10.5 mag in 2003 spring. It was fainter than this ephemeris, around 16 mag recently.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 6 46.61 26 2.0 3.294 2.763 50 15.1 20.9 96.4 18:35 (138, 15)
May 18 6 57.59 25 44.0 3.339 2.737 46 15.0 21.8 97.3 18:31 (136, 14)
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It will be observable at 15 mag until August when it becomes low in the evening sky. It is brighter than this ephemeris recently, 14.5 mag even by CCD.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 10 59.50 19 0.6 2.740 3.202 108 15.1 5.1 162.7 19:43 (180, 36)
May 18 11 0.74 18 23.6 2.811 3.181 102 15.1 6.7 148.3 19:17 (180, 37)
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It is observable until autumn at 15 mag. It was reported as 14 mag visually, but as 16 mag by CCD, so there is a large difference.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 10 5.57 65 40.5 5.232 5.142 79 15.2 13.1 161.7 18:49 (180,-11)
May 18 10 10.55 64 13.2 5.309 5.158 75 15.2 13.5 158.4 18:31 (180, -9)
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Fading now. It is observable in good condition until to fade out.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 11 30.73 42 1.6 2.348 2.737 101 15.8 16.1 171.3 20:14 (180, 13)
May 18 11 32.81 40 10.2 2.466 2.785 97 16.0 16.5 165.0 19:49 (180, 15)
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It is brighter than this ephemeris recently, 15.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 10 31.56 20 1.4 2.022 2.438 101 16.0 15.8 160.2 19:15 (180, 35)
May 18 10 34.78 18 16.6 2.090 2.424 96 16.0 16.9 153.0 18:51 (180, 37)
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It keeps brighter than 17 mag until August.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 15 41.77 -16 11.2 2.883 3.886 172 16.1 9.7 276.9 0:29 (180, 71)
May 18 15 37.06 -16 3.2 2.884 3.894 176 16.1 9.8 276.5 23:52 (180, 71)
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Not yet observed in this return. It is getting brighter in the morning sky. It will reach to 15.5 mag in July and August. It bursted out and became 6 mag brighter than this ephemeris in the previous return in 1996.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 19 30.82 -17 22.0 1.178 1.881 118 17.0 19.8 73.7 4:17 (180, 72)
May 18 19 39.58 -16 42.9 1.103 1.857 122 16.7 17.8 71.8 3:58 (180, 72)
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Asteroid with a cometary orbit of 6.8 year period. Fading now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 11 2.70 17 16.6 1.274 1.873 109 16.9 25.8 130.1 19:47 (180, 38)
May 18 11 12.45 15 21.5 1.375 1.917 105 17.1 26.0 128.6 19:29 (180, 40)
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Fading very slowly. It was brighter than the ephemeris recently, reported around 16 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 9 8.55 17 54.9 6.980 6.949 84 17.0 2.9 323.1 18:35 (167, 36)
May 18 9 7.93 18 10.0 7.135 6.981 77 17.1 2.1 338.6 18:31 (161, 35)
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It keeps 17 mag locating at the same altitude until October in the Northerm Hemisphere.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 18 36.33 -16 26.5 10.712 11.400 131 17.1 2.0 282.2 3:22 (180, 71)
May 18 18 35.25 -16 23.8 10.642 11.413 137 17.1 2.5 278.1 2:54 (180, 71)
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Fading. It will be about 18 mag in June when it becomes low in the evening.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 11 52.43 -12 24.4 5.021 5.746 131 17.1 9.8 277.6 20:35 (180, 67)
May 18 11 48.15 -12 16.3 5.163 5.795 124 17.2 8.2 277.0 20:04 (180, 67)
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No observations have been reported since 2001 December. If it keeps the brightness of small outburst in 2001 autumn, it is probably brighter than 18 mag still now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 11 21 46.72 11 28.9 8.305 8.156 78 17.7 5.3 3.2 5:16 (205, 40)
May 18 21 46.68 12 5.7 8.244 8.201 84 17.7 5.2 354.5 5:21 (194, 42)
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