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Image:
1999 May 20
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In the Northern Hemisphere, it will be in the evening sky as 7 mag until mid June. Then it will appear at dawn as 7 mag in late July. After that, it will fade while being higher.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 8 30.10 7 45.8 1.155 1.005 54 7.3 55.6 345.4 20:55 ( 91, 13)
June 12 8 24.01 13 21.9 1.294 0.916 44 7.2 44.7 344.4 21:00 (101, 8)
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Image:
1999 May 20
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It was 12.1 mag by CCD on May 20 and 11.8 mag even visually on May 19. So it must be about 2-3 mag fainter than this ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 23 18.65 -11 37.0 1.135 1.496 88 9.0 39.9 217.9 3:01 (304, 23)
June 12 23 2.70 -16 15.8 0.915 1.480 99 8.5 66.5 221.2 2:59 (315, 26)
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Image:
1999 Feb. 6
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Mother asteroid of Geminids. Now it is too close to the sun and not observable. It will appear at dawn as 14 mag in late June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 5 33.71 19 25.6 1.038 0.191 10 11.1 9.6 357.8 20:55 (126,-14)
June 12 4 39.69 25 19.9 0.866 0.213 9 10.9 134.0 295.4 2:59 (228,-11)
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Image:
1998 Dec. 13
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Not observable. It will appear again in September as 13 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 4 18.86 17 33.1 2.679 1.684 8 11.6 42.4 83.7 3:01 (233,-17)
June 12 4 39.42 18 0.5 2.686 1.698 10 11.7 41.9 85.4 2:59 (234,-16)
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Only southern people can observe it. Norhtern people can never see it again.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 5 43.05 -62 54.1 8.581 8.570 86 12.0 6.4 89.2 20:55 ( 33,-45)
June 12 5 49.65 -62 55.5 8.631 8.624 86 12.0 6.5 94.7 21:00 ( 32,-48)
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Image:
1999 May 20
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In the Northern Hemisphere, it gets low in late June. After conjunction, it will appear again at dawn in mid October as 14.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 9 5.72 30 16.6 2.799 2.403 57 12.0 26.9 153.1 20:55 (107, 31)
June 12 9 12.26 27 35.3 2.946 2.461 52 12.3 25.3 150.7 21:00 (107, 25)
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Image:
1999 May 20
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Beginning to be higher in the Northern Hemisphere. It will be 13-14 mag until September under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 23 30.53 -7 34.1 1.202 1.486 83 13.0 37.4 59.9 3:01 (299, 23)
June 12 23 45.10 -5 24.8 1.180 1.505 86 13.0 34.8 58.7 2:59 (299, 27)
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Image:
1998 Dec. 5
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Only southern people can observe it. It will appear again in 2000 August as 13 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 8 3.31 -44 52.5 3.831 3.797 80 13.2 7.0 95.0 20:55 ( 50,-22)
June 12 8 8.27 -45 0.8 3.843 3.770 78 13.1 8.3 102.4 21:00 ( 52,-26)
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Image:
1999 May 20
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Small outburst happened and it looked stellar as 14.5 mag on June 5.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 14 50.86 -27 46.7 5.244 6.162 152 13.5 5.7 296.8 21:56 ( 0, 27)
June 12 14 48.38 -27 28.7 5.294 6.160 145 13.5 5.0 300.7 21:26 ( 0, 28)
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Image:
1999 Apr. 14
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It is getting brighter. It was about 15 mag in mid May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 17 24.41 -4 36.2 0.769 1.758 160 14.0 10.0 248.0 0:34 ( 0, 50)
June 12 17 19.64 -5 12.0 0.728 1.723 162 13.6 12.7 239.0 0:01 ( 0, 50)
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Image:
1999 May 12
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It will be too low to observe in June. After appearing again at dawn in December, it will be lower than 20 deg 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)
June 5 8 53.66 7 44.6 2.613 2.285 60 14.2 29.0 112.5 20:55 ( 87, 18)
June 12 9 6.27 6 26.1 2.699 2.309 56 14.3 29.2 112.8 21:00 ( 89, 13)
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Image:
1999 May 20
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Although it will be low in October and November, Northern people can observe it as 14 mag until 2000 April. Then they can trace it until July as the comet gets low at dusk as 16.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 17 30.24 57 19.3 3.240 3.556 99 14.4 31.5 285.5 0:40 (180, 68)
June 12 17 3.35 57 59.0 3.242 3.543 98 14.3 31.2 276.1 23:39 (180, 67)
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Image:
1998 Dec. 13
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Although it is getting higher in the morning sky, it will be only 18 deg high in July 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)
June 5 23 27.36 -28 53.3 5.030 5.185 93 14.4 10.2 161.3 3:01 (315, 9)
June 12 23 28.81 -30 3.6 4.970 5.233 99 14.4 10.6 168.6 2:59 (319, 11)
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Not yet observed in this return. We can observe it until November as 15-16 mag. But it should be much fainter than the ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 2 25.26 29 56.3 2.861 2.088 33 15.1 33.7 59.0 3:01 (241, 11)
June 12 2 40.92 31 54.7 2.842 2.107 35 15.1 33.1 59.8 2:59 (240, 14)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 9 24.42 15 2.8 2.190 1.984 64 15.2 33.9 110.7 20:55 ( 89, 28)
June 12 9 39.77 13 36.4 2.255 1.993 62 15.3 34.4 111.5 21:00 ( 90, 24)
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Image:
1999 Jan. 16
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Only southern people can observe it. It will appear at dawn also for Norhtern observers. The brightness after late February is unknown.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 17 22.12 -52 13.0 1.324 2.258 149 15.3 53.5 304.2 0:33 ( 0, 3)
June 12 16 52.46 -48 28.0 1.395 2.350 154 15.6 49.5 311.8 23:28 ( 0, 7)
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New comet. Because it is far away, it keeps 15 mag until late 2000, while Northern people can observe it under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 21 39.05 35 28.5 5.046 5.155 90 15.6 6.7 28.4 3:01 (261, 68)
June 12 21 40.59 36 8.3 4.957 5.137 94 15.6 5.8 21.6 2:59 (260, 73)
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Image:
1999 May 17
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New comet. Because it is extremely far away, it keeps 15 mag until late 2000, while Northern people can observe it under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 16 27.03 62 52.4 7.390 7.538 94 15.6 10.2 245.2 23:31 (180, 62)
June 12 16 17.80 62 17.9 7.399 7.533 93 15.6 10.5 238.3 22:55 (180, 63)
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Not yet observed in this return. Now is the chance for the first observation. We can observe it as 14 mag from summer though winter under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 1 11.15 1 49.9 2.339 1.979 56 15.8 35.0 71.5 3:01 (275, 10)
June 12 1 26.69 3 6.6 2.265 1.958 59 15.7 35.1 72.1 2:59 (275, 12)
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New comet. The perihelion passage is in 2000 July, when it will be 13.5 mag. But the comet is in the southern sky. Northern people can observe it until October as 15 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 19 36.63 -10 56.7 4.065 4.874 138 15.9 11.8 231.0 2:45 ( 0, 44)
June 12 19 31.89 -11 51.3 3.950 4.830 146 15.8 13.5 232.5 2:13 ( 0, 43)
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Image:
1999 Apr. 14
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It was about 16.5 mag in March and April, a bit fainter than the ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 15 53.89 -16 5.2 8.494 9.479 165 16.0 4.2 284.0 22:59 ( 0, 39)
June 12 15 51.99 -15 58.5 8.539 9.490 158 16.0 3.9 283.4 22:30 ( 0, 39)
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Not yet observed in this return. Now is the chance for the first observation. We can observe it as 15 mag from summer though winter under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 2 4.24 18 15.1 2.673 1.990 39 16.1 36.1 59.6 3:01 (253, 8)
June 12 2 19.74 20 21.7 2.615 1.974 41 16.0 36.3 60.2 2:59 (253, 11)
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New comet. It will keep over 60 deg high until late November, when it will be 18 mag, so we can observe its fading out under good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 18 59.10 17 57.2 1.546 2.320 128 16.1 32.3 350.8 2:08 ( 0, 73)
June 12 18 55.97 21 35.3 1.519 2.302 129 16.0 31.2 346.3 1:37 ( 0, 76)
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First return. Bright and now is the chance to recover. It is already observable in the Southern Hemisphere. Even in the Northern Hemisphere, the comet will be higher after this. It will be brightening slowly and reach to 15 mag in September.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 0 31.87 5 22.9 2.764 2.501 64 16.2 24.7 73.9 3:01 (277, 20)
June 12 0 42.85 6 9.0 2.687 2.498 68 16.1 23.9 74.7 2:59 (279, 23)
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Image:
1999 May 7
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Fading as expected. Observation is hard because it is in the Milky Way.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 18 47.18 15 24.0 1.823 2.618 132 16.2 46.9 258.3 1:57 ( 0, 70)
June 12 18 24.91 14 6.2 1.840 2.693 139 16.3 47.8 254.8 1:07 ( 0, 69)
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New comet. It will close to the earth down to 0.4 AU in October and reach to 11 mag. In the Northern Hemisphere, people can observe it until mid November. But because the comet is moving southwards, it will just over the horizon after the approach to the earth. It will not be obesrvable after 2000 February. On the other hand, southern people cannot see it until the approach.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 12 23.85 78 8.2 2.079 2.023 72 16.6 29.9 261.0 20:55 (173, 46)
June 12 11 24.82 77 2.3 2.085 1.944 67 16.5 27.5 243.0 21:00 (167, 44)
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New comet. Although it is very high, it fades out rapidly as 17.5 mag in late June, 18.5 mag in late July. It was just 18 arcmin from C/1999 K6 (LINEAR) on May 20 at 22h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 18 22.17 20 24.6 1.458 2.263 131 16.9 55.1 314.2 1:32 ( 0, 75)
June 12 18 2.18 24 30.0 1.509 2.308 131 17.0 50.4 309.0 0:44 ( 0, 79)
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New comet. It will be over 45 deg high and 17 mag until mid November.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 20 41.41 -5 40.6 4.675 5.282 121 17.1 11.3 315.8 3:01 (342, 48)
June 12 20 37.37 -4 44.4 4.574 5.271 128 17.0 12.3 310.4 2:59 (352, 50)
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Image:
1999 Mar. 12
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No observations reported since it appeared at dawn, except for Ageo Survey team's one on Mar. 12 (16.4 mag).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 0 30.68 57 52.5 4.468 4.021 57 17.3 15.7 46.5 3:01 (220, 40)
June 12 0 40.46 59 6.9 4.481 4.069 59 17.4 14.8 44.8 2:59 (219, 42)
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It was observed for the first time in this return on Apr. 12, but the brightness is unknown. Now is the peak on the brightness.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 18 4.61 -7 5.1 1.114 2.084 156 17.5 9.0 298.4 1:14 ( 0, 48)
June 12 18 0.54 -6 40.3 1.110 2.096 160 17.5 9.7 286.7 0:42 ( 0, 48)
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It was 17.5 mag on May 13. It seems to be fading a bit rapidly.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 22 14.21 10 35.7 3.545 3.757 94 17.7 10.2 31.4 3:01 (299, 50)
June 12 22 16.35 11 34.5 3.491 3.794 99 17.8 8.9 24.5 2:59 (304, 54)
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No observations reported since last May, although it is already high enough for observation.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 18 57.58 -16 48.7 2.106 3.025 149 17.8 6.6 276.2 2:06 ( 0, 38)
June 12 18 54.00 -16 45.0 2.093 3.053 156 17.9 8.0 272.3 1:35 ( 0, 38)
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New comet. It will be 18.0 mag at 60 deg high in next winter 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)
June 5 15 8.74 48 23.1 3.671 4.063 105 18.2 21.0 284.1 22:13 (180, 77)
June 12 14 54.77 48 49.3 3.723 4.045 101 18.2 19.3 277.6 21:32 (180, 76)
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New comet. It fades out rapidly as 19 mag in late June, 20 mag in late July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 17 42.52 17 32.9 1.739 2.584 137 18.3 58.0 258.7 0:53 ( 0, 73)
June 12 17 14.92 15 57.4 1.754 2.622 140 18.4 58.0 254.5 23:50 ( 0, 71)
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Image:
1999 Jan. 30
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A Centaur asteroid. The perihelion passage is in 1991. It will keep 18 mag until around 2000.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
June 5 14 7.85 14 42.5 13.555 14.169 125 18.4 2.1 251.7 21:13 ( 0, 70)
June 12 14 6.95 14 36.8 13.657 14.188 119 18.4 1.9 240.8 21:00 ( 10, 69)
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