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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 4 18 25.13 55 44.2 0.410 1.119 94 5.3 135.7 238.7 3:42 (180, -1)
May 11 17 10.69 45 57.8 0.440 1.236 110 5.8 122.9 223.4 1:59 (180, 9)
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It brightened rapidly after early April and reached to 4.5-5.0 mag in mid April. It is still 4 mag and strongly condensed after the perihelion passage. After now, it locates just on the horizon at dusk until early May in the Northern Hemisphere. In the Southern Hemisphere, it will be observable in May and June, but it only locates very low in the evening sky. It approaches to Mercury on May 4 down to 3 arcmin.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 4 4 6.57 23 37.2 1.318 0.522 20 5.7 111.6 122.0 18:41 (115, -5)
May 11 4 47.00 16 44.1 1.421 0.630 23 8.0 90.2 128.9 18:35 (112, 2)
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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 4 18 22.65 25 31.2 1.365 1.983 112 10.6 44.3 318.7 3:37 (180, 30)
May 11 18 6.78 29 3.5 1.425 2.085 116 11.0 41.2 311.6 2:54 (180, 26)
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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 4 19 23.23 60 8.5 1.531 1.772 85 10.9 56.7 354.9 4:37 (180, -5)
May 11 19 15.82 66 16.5 1.621 1.826 84 11.2 49.4 349.7 4:02 (180,-11)
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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 4 9 33.07 25 40.6 0.722 1.279 93 11.1 109.6 174.1 18:45 (180, 30)
May 11 9 38.59 14 52.4 0.861 1.349 91 11.7 78.8 171.9 18:35 (176, 41)
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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 4 1 54.85 0 20.9 2.598 1.682 19 12.3 40.2 76.2 5:12 (269, 1)
May 11 2 12.77 1 25.0 2.624 1.727 21 12.7 38.8 77.0 5:16 (266, 3)
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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 4 1 10.28 72 55.1 3.963 3.544 58 12.9 21.6 31.4 5:12 (199,-30)
May 11 1 30.20 75 4.9 3.960 3.545 58 12.9 22.3 32.7 5:16 (197,-30)
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New comet. Although it will be observable all after this in the Northern Hemisphere, it will be fainter gradually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 4 19 6.27 43 29.4 1.306 1.727 95 13.5 83.8 338.8 4:20 (180, 12)
May 11 18 41.93 52 11.0 1.332 1.759 96 13.6 79.9 331.4 3:29 (180, 3)
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Takuo Kojima reported that it was in outburst at 14.4 mag on Mar. 28.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 4 21 6.81 -18 6.4 5.760 5.840 89 13.5 4.5 67.4 5:12 (226, 67)
May 11 21 8.58 -17 55.4 5.647 5.838 95 13.5 3.4 65.1 5:16 (209, 71)
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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 4 20 35.73 -6 1.4 0.707 1.266 93 13.8 59.8 106.7 5:12 (198, 60)
May 11 21 2.72 -8 8.3 0.680 1.259 94 13.7 60.4 108.5 5:16 (197, 62)
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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 4 20 12.76 19 41.5 2.685 2.896 91 14.3 18.7 290.6 5:12 (184, 35)
May 11 20 2.89 20 26.3 2.534 2.868 98 14.1 23.2 285.5 4:49 (180, 35)
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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 4 17 0.67 9 39.6 4.533 5.320 137 14.3 13.5 330.2 2:15 (180, 45)
May 11 16 57.25 11 0.2 4.486 5.309 141 14.3 13.6 325.8 1:44 (180, 44)
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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 4 9 52.60 -4 0.8 4.597 4.997 107 15.0 11.5 303.8 19:03 (180, 59)
May 11 9 48.52 -3 18.0 4.670 4.946 100 15.0 9.8 306.4 18:35 (178, 58)
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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 4 10 59.25 19 31.9 2.672 3.224 114 15.0 4.1 187.3 20:10 (180, 36)
May 11 10 59.50 19 0.6 2.740 3.202 108 15.1 5.1 162.7 19:43 (180, 36)
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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 4 15 48.71 -39 59.2 2.091 3.018 151 15.2 10.7 252.4 1:03 ( 0, 85)
May 11 15 42.00 -40 17.4 2.009 2.962 156 15.1 11.9 260.4 0:29 ( 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 4 11 34.90 9 24.4 1.823 2.559 126 15.2 4.7 279.3 20:46 (180, 46)
May 11 11 33.35 9 24.9 1.857 2.518 119 15.1 2.0 251.9 20:17 (180, 46)
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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 4 6 36.07 26 17.1 3.245 2.788 54 15.2 19.9 95.6 18:41 (140, 16)
May 11 6 46.61 26 2.0 3.294 2.763 50 15.1 20.9 96.4 18:35 (138, 15)
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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 4 10 1.34 67 6.7 5.156 5.126 82 15.2 12.6 165.4 19:13 (180,-12)
May 11 10 5.57 65 40.5 5.232 5.142 79 15.2 13.1 161.7 18:49 (180,-11)
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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 4 11 29.81 43 52.2 2.234 2.689 105 15.6 15.7 178.3 20:41 (180, 11)
May 11 11 30.73 42 1.6 2.348 2.737 101 15.8 16.1 171.3 20:14 (180, 13)
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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 4 10 29.53 21 44.0 1.956 2.453 107 15.9 14.7 169.2 19:41 (180, 33)
May 11 10 31.56 20 1.4 2.022 2.438 101 16.0 15.8 160.2 19:15 (180, 35)
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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 4 15 46.31 -16 19.4 2.895 3.878 164 16.1 9.1 277.2 1:01 (180, 71)
May 11 15 41.77 -16 11.2 2.883 3.886 172 16.1 9.7 276.9 0:29 (180, 71)
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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 4 10 53.17 19 14.1 1.178 1.830 113 16.7 25.5 131.6 20:05 (180, 36)
May 11 11 2.70 17 16.6 1.274 1.873 109 16.9 25.8 130.1 19:47 (180, 38)
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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 4 9 9.67 17 37.1 6.822 6.918 91 17.0 4.0 314.3 18:41 (174, 37)
May 11 9 8.55 17 54.9 6.980 6.949 84 17.0 2.9 323.1 18:35 (167, 36)
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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 4 19 21.09 -18 0.4 1.259 1.906 113 17.2 21.4 75.5 4:34 (180, 73)
May 11 19 30.82 -17 22.0 1.178 1.881 118 17.0 19.8 73.7 4:17 (180, 72)
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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 4 11 57.45 -12 34.4 4.891 5.697 139 17.0 11.4 277.7 21:08 (180, 68)
May 11 11 52.43 -12 24.4 5.021 5.746 131 17.1 9.8 277.6 20:35 (180, 67)
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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 4 18 37.17 -16 29.8 10.790 11.386 124 17.1 1.5 289.1 3:51 (180, 71)
May 11 18 36.33 -16 26.5 10.712 11.400 131 17.1 2.0 282.2 3:22 (180, 71)
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It will be fainter than 18 mag and low in the evening sky at the end of this month.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 4 9 6.88 19 30.1 3.284 3.436 90 17.8 10.0 107.1 18:41 (174, 35)
May 11 9 11.92 19 7.9 3.386 3.440 84 17.9 11.4 107.4 18:35 (169, 35)
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