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Image:
1999 Sept. 5
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The CCD images show the long anti-tail. Southern observers cannot see it until October.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 5 17.73 56 5.2 1.002 1.366 85 8.2 77.0 295.9 4:13 (213, 62)
Sept.18 4 4.32 59 1.8 0.905 1.467 100 8.4 98.9 279.4 4:19 (181, 66)
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Image:
1999 Sept. 5
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It brightened rapidly and reached to 9.5 mag. It will close to the earth down to 0.5 AU in October and reach to 8 mag. Because the comet goes southwards, northern people can observe it only until mid October. On the other hand, southern people can observe it after when it appears in October.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 8 32.74 45 16.5 1.165 0.991 53 9.1 40.4 196.3 4:13 (235, 34)
Sept.18 8 24.89 40 1.8 1.008 0.979 58 8.7 54.0 194.6 4:19 (244, 39)
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Image:
1999 Sept. 5
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10 mag visually, well condensed and easy to see. It looks cometary also by CCD now and becomes harder to catch. It is close to Nova Sgr 1998.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 18 17.05 -29 23.5 0.847 1.482 105 9.9 36.3 107.4 19:39 ( 10, 25)
Sept.18 18 36.42 -30 29.0 0.888 1.485 103 10.0 37.9 102.2 19:28 ( 9, 24)
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Image:
1999 Aug. 31
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It is fading out rapidly since late August. It keeps observable for Northern people. It locates low at dusk until late October, then it turns to appear at dawn. It passes near by the North Pole in early February in 2000.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 13 6.66 32 2.9 1.833 1.206 37 10.3 19.1 42.5 19:39 (116, 19)
Sept.18 13 13.75 33 38.3 1.930 1.301 38 10.9 18.3 43.5 19:28 (119, 18)
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Only southern people can observe it. Northern 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)
Sept.11 7 3.79 -69 2.1 9.346 9.315 85 12.5 7.1 159.4 4:13 (342,-21)
Sept.18 7 6.71 -69 49.6 9.406 9.367 84 12.6 7.1 164.7 4:19 (345,-20)
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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)
Sept.11 10 14.89 -59 40.4 3.805 3.511 65 12.7 23.4 135.3 4:13 (323,-35)
Sept.18 10 30.92 -61 38.6 3.799 3.498 65 12.7 24.2 135.4 4:19 (326,-33)
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Image:
1999 July 30
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Not observable. It appears again at dawn as 15 mag in December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 13 47.21 -18 56.5 2.402 1.823 44 12.9 3.5 37.5 19:39 ( 68, -2)
Sept.18 13 48.51 -18 41.2 2.571 1.880 37 13.2 3.5 61.5 19:28 ( 70, -4)
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Not yet observed in this return. The ephemeris says it reaches to 12 mag from October to December. However, it will be much fainter than the ephemeris in fact.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 1 3.67 -32 12.8 0.935 1.840 142 13.8 7.1 241.7 1:46 ( 0, 23)
Sept.18 0 59.26 -32 27.5 0.889 1.804 144 13.6 9.7 266.0 1:14 ( 0, 23)
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Image:
1998 Dec. 13
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Appearing at dawn. No observations reported since Jan. 12.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 8 28.63 11 57.3 2.708 2.069 41 13.9 30.0 106.8 4:13 (269, 20)
Sept.18 8 41.97 10 55.7 2.693 2.108 45 14.0 28.8 108.0 4:19 (273, 23)
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Image:
1999 June 12
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After conjunction, it appears at dawn in 2000 January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 15 2.20 -26 1.4 6.528 6.136 62 14.0 7.9 97.2 19:39 ( 51, 7)
Sept.18 15 6.45 -26 9.2 6.620 6.134 57 14.0 8.6 98.3 19:28 ( 53, 5)
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Image:
1999 Sept. 5
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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)
Sept.11 21 18.51 33 48.5 3.863 4.604 132 14.1 10.7 198.0 21:57 ( 0, 89)
Sept.18 21 16.93 32 33.6 3.852 4.581 131 14.0 11.4 191.7 21:28 ( 0, 87)
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New comet. It will fade out very soon. We can never observe it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 11 23.88 4 22.0 1.299 0.295 2 14.1 109.2 118.0 19:39 (107,-16)
Sept.18 12 0.62 -0 36.9 1.531 0.541 5 17.1 74.5 118.7 19:28 (100,-16)
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Not observable around the perihelion passage at all. When it appears at dawn in 2000 June, it will be already fainter than 15 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 12 3.20 6 30.1 2.835 1.862 12 14.5 36.7 116.5 19:39 (103, -8)
Sept.18 12 18.81 4 33.9 2.807 1.825 9 14.3 37.7 116.5 19:28 (102, -9)
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Image:
1999 May 20
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Not observable. 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)
Sept.11 10 28.43 3 18.9 4.250 3.271 11 14.3 16.6 141.9 4:13 (259,-10)
Sept.18 10 33.07 1 48.3 4.284 3.335 16 14.4 16.1 143.1 4:19 (264, -5)
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Image:
1999 Sept. 5
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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)
Sept.11 14 18.41 39 1.3 4.009 3.508 53 14.8 13.0 185.6 19:39 (116, 35)
Sept.18 14 18.01 37 34.5 4.063 3.512 50 14.8 11.9 180.5 19:28 (116, 31)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 0 27.89 9 26.0 0.994 1.960 156 14.8 15.6 267.0 1:11 ( 0, 64)
Sept.18 0 20.29 9 15.3 1.017 2.004 164 15.1 16.5 262.5 0:36 ( 0, 64)
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Image:
1999 July 31
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Almost stellar object. 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)
Sept.11 18 14.59 -26 51.1 3.894 4.273 105 15.3 9.6 209.7 19:39 ( 11, 27)
Sept.18 18 12.58 -27 48.0 3.972 4.233 98 15.3 8.4 200.1 19:28 ( 16, 25)
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First return, but not yet detected. It will be brightest soon. However, it is surely much fainter actually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 2 7.86 6 39.5 1.741 2.558 135 15.3 6.8 169.7 2:50 ( 0, 62)
Sept.18 2 7.85 5 49.5 1.700 2.570 142 15.3 7.7 189.4 2:23 ( 0, 61)
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First return of a split comet. The condition is best and we can always observe it until it faded out. It wad recovered as about 20.5 mag (m2) on Aug. 3, about 3 mag fainter than this ephemeris. It will be around 19 mag now in fact.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 16 48.18 -10 53.4 1.278 1.546 84 15.8 11.1 96.6 19:39 ( 40, 35)
Sept.18 16 54.35 -11 3.4 1.277 1.468 79 15.4 15.0 96.0 19:28 ( 43, 33)
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Image:
1999 Sept. 5
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Because it is extremely far away, it keeps 15 mag until late 2000, while Northern people can observe it under good condition. Looks like a stellar object by CCD.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 15 34.25 47 1.0 7.527 7.236 69 15.5 11.2 168.4 19:39 (124, 50)
Sept.18 15 36.01 45 45.7 7.556 7.227 67 15.5 11.0 164.3 19:28 (122, 48)
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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)
Sept.11 6 2.79 49 41.3 2.432 2.442 78 15.7 19.6 65.6 4:13 (230, 59)
Sept.18 6 15.17 50 36.9 2.388 2.473 82 15.8 17.9 63.8 4:19 (226, 62)
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Image:
1999 Sept. 5
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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)
Sept.11 18 30.17 36 31.6 1.885 2.314 101 16.0 11.7 115.3 19:39 (106, 84)
Sept.18 18 37.03 35 54.0 1.937 2.334 100 16.1 14.3 113.3 19:28 ( 99, 82)
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Image:
1999 Feb. 6
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Mother asteroid of Geminids. No astrometric observations have been reported since 1996 December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 4 7.56 46 54.5 1.242 1.703 97 16.2 17.6 302.5 4:13 (208, 76)
Sept.18 3 55.35 47 55.4 1.207 1.766 105 16.2 22.0 290.9 4:10 (180, 77)
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Image:
1999 May 31
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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)
Sept.11 19 27.58 2 47.7 4.799 5.408 122 16.2 7.0 287.1 20:07 ( 0, 58)
Sept.18 19 24.80 3 1.4 4.904 5.419 115 16.3 5.5 289.6 19:36 ( 0, 58)
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Not yet observed in this return. The condition is best. It will keep over 75 deg high until next February in Northern Hemisphere. It will be 13 mag in December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 2 17.04 42 27.1 1.304 1.980 117 16.5 16.1 37.4 2:59 (180, 83)
Sept.18 2 22.70 43 52.7 1.218 1.941 121 16.2 14.1 34.1 2:37 (180, 81)
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Appearing at dawn, but not yet observed. It will be 16 mag and locale high in next autumn and winter, but maybe it is 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)
Sept.11 6 56.54 29 44.9 2.566 2.339 65 16.4 25.9 95.7 4:13 (262, 47)
Sept.18 7 10.11 29 24.7 2.493 2.339 69 16.4 25.0 97.1 4:19 (265, 51)
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Image:
1999 June 30
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We can observe it until October when it fades to 17 mag and becomes 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)
Sept.11 15 20.45 11 42.5 6.003 5.584 60 16.7 9.0 103.1 19:39 ( 79, 35)
Sept.18 15 24.79 11 28.5 6.106 5.612 56 16.7 9.6 101.7 19:28 ( 81, 33)
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It was 16.8 mag on Aug. 5, 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)
Sept.11 6 11.17 41 10.5 1.922 1.947 76 16.8 30.3 74.5 4:13 (247, 58)
Sept.18 6 29.05 42 3.6 1.874 1.960 79 16.7 28.9 75.3 4:19 (245, 61)
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It was 17.4 mag on Sept. 12, much fainter than the ephemeris. It tends to be at peak while after the perihelion passage, so it may be bright suddenly after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 4 38.81 12 51.4 1.424 1.852 97 17.3 24.1 86.9 4:13 (321, 63)
Sept.18 4 49.75 12 58.3 1.370 1.858 101 17.2 21.6 88.1 4:19 (333, 66)
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It keeps 17.5 mag and 40 deg high until October. A stellar object.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 19 41.22 -14 31.5 1.570 2.315 126 17.3 1.7 159.1 20:21 ( 0, 40)
Sept.18 19 42.31 -14 41.5 1.604 2.279 119 17.3 4.1 107.3 19:54 ( 0, 40)
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It will be observable at a good position as 17 mag around the perihelion passage in 2000 June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept.11 18 14.22 -1 27.4 5.496 5.835 104 17.4 9.5 249.6 19:39 ( 19, 52)
Sept.18 18 10.40 -1 50.6 5.602 5.820 97 17.4 8.1 246.2 19:28 ( 26, 50)
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