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Image:
1999 Aug. 22
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The CCD images show the broad 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. 4 6 3.96 52 4.9 1.116 1.264 72 8.0 59.0 306.3 4:52 (201, -2)
Sept.11 5 17.51 56 5.2 1.001 1.365 85 8.2 77.1 295.8 4:42 (191, -3)
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Image:
1999 July 31
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The body of the comet is getting brighter since the discovery. It may be brighter than the ephemris for a while. 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. 4 12 57.73 30 2.3 1.729 1.114 37 9.7 20.7 40.7 19:06 (123, -6)
Sept.11 13 4.86 31 45.8 1.843 1.206 37 10.1 19.0 42.2 19:11 (121,-12)
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Image:
1999 July 31
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10 mag visually, well condensed and easy to see. It is stellar by CCD.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept. 4 17 59.35 -27 59.1 0.810 1.482 108 9.8 34.4 112.9 19:07 (180, 83)
Sept.11 18 17.05 -29 23.5 0.847 1.482 105 9.9 36.3 107.4 19:11 (152, 84)
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Image:
1999 Aug. 18
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It brightened rapidly from 12 mag to 10 mag in August. It also looks well on the CCD images now. 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. 4 8 39.92 49 15.9 1.312 1.018 49 10.2 31.8 197.7 4:52 (221,-17)
Sept.11 8 32.74 45 16.5 1.165 0.991 53 9.8 40.4 196.3 4:42 (222,-11)
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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. 4 7 0.18 -68 16.1 9.286 9.263 85 12.5 7.1 154.3 4:52 (336, 47)
Sept.11 7 3.78 -69 2.1 9.346 9.315 85 12.5 7.1 159.4 4:42 (338, 48)
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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. 4 13 46.50 -19 20.4 2.220 1.769 51 12.6 4.2 9.4 19:06 ( 88, 33)
Sept.11 13 47.21 -18 56.5 2.402 1.823 44 12.9 3.5 37.5 19:11 ( 84, 26)
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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. 4 10 0.26 -57 47.0 3.812 3.524 65 12.7 22.5 134.8 4:52 (323, 27)
Sept.11 10 14.89 -59 40.4 3.805 3.511 65 12.7 23.4 135.3 4:42 (325, 28)
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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. 4 8 14.59 12 56.9 2.720 2.032 38 13.7 31.2 105.5 4:52 (246, 10)
Sept.11 8 28.63 11 57.2 2.709 2.069 41 13.9 30.0 106.8 4:42 (247, 11)
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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. 4 1 6.12 -31 42.5 0.989 1.878 140 14.1 5.8 207.0 2:16 (180, 87)
Sept.11 1 3.67 -32 12.8 0.935 1.840 142 13.8 7.1 241.7 1:46 (180, 87)
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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. 4 14 58.31 -25 55.3 6.430 6.138 68 14.0 7.2 95.9 19:06 ( 91, 50)
Sept.11 15 2.21 -26 1.4 6.528 6.136 62 14.0 7.9 97.2 19:11 ( 86, 45)
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Image:
1999 Aug. 1
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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. 4 21 20.61 34 55.8 3.884 4.627 132 14.1 9.9 204.5 22:27 (180, 20)
Sept.11 21 18.51 33 48.5 3.863 4.604 132 14.1 10.7 198.0 21:57 (180, 21)
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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. 4 10 23.53 4 50.8 4.205 3.207 7 14.2 17.0 141.0 4:52 (272,-11)
Sept.11 10 28.43 3 18.9 4.250 3.271 11 14.3 16.6 141.9 4:42 (271, -8)
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Not yet observed in this return. We can observe it as 14 mag from summer though winter under good condition. However, it will be surely 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. 4 4 26.81 12 39.9 1.480 1.848 93 14.4 26.2 85.6 4:52 (194, 41)
Sept.11 4 38.81 12 51.4 1.424 1.852 97 14.3 24.1 86.9 4:42 (192, 41)
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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. 4 11 47.98 8 22.8 2.860 1.900 14 14.8 35.6 116.4 19:06 ( 95, -7)
Sept.11 12 3.20 6 30.1 2.835 1.862 12 14.5 36.7 116.5 19:11 ( 91, -9)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept. 4 0 34.86 9 26.1 0.981 1.917 148 14.6 13.7 273.5 1:45 (180, 46)
Sept.11 0 27.89 9 26.0 0.994 1.960 156 14.8 15.6 267.0 1:11 (180, 46)
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Image:
1999 July 31
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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. 4 14 19.62 40 35.0 3.948 3.503 57 14.7 14.1 190.9 19:06 (142, -1)
Sept.11 14 18.43 39 1.2 4.008 3.507 53 14.8 13.0 185.6 19:11 (136, -4)
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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. 4 18 17.55 -25 51.2 3.819 4.313 112 15.3 11.0 217.0 19:24 (180, 81)
Sept.11 18 14.59 -26 51.1 3.894 4.273 105 15.3 9.6 209.7 19:11 (154, 81)
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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. 4 2 10.98 7 32.7 1.806 2.551 127 15.4 6.9 143.6 3:21 (180, 47)
Sept.11 2 12.29 6 50.3 1.756 2.563 134 15.4 6.7 167.1 2:54 (180, 48)
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Image:
1999 July 31
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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. 4 15 32.98 48 18.6 7.498 7.245 71 15.5 11.3 172.7 19:06 (157, 1)
Sept.11 15 34.25 47 1.1 7.528 7.236 69 15.5 11.2 168.5 19:11 (152, -1)
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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. 4 5 49.47 48 44.3 2.474 2.412 74 15.7 21.1 66.7 4:52 (200, 2)
Sept.11 6 2.80 49 41.3 2.432 2.442 78 15.7 19.6 65.6 4:42 (199, 1)
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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. 4 16 43.86 -10 46.5 1.275 1.624 89 16.2 7.1 96.7 19:06 (140, 60)
Sept.11 16 48.16 -10 53.9 1.279 1.547 84 15.8 11.1 96.6 19:11 (130, 56)
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Image:
1999 July 31
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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. 4 18 24.76 37 3.6 1.835 2.296 103 15.9 8.9 117.2 19:32 (180, 18)
Sept.11 18 30.17 36 31.6 1.885 2.314 101 16.0 11.7 115.3 19:11 (180, 19)
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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. 4 19 31.07 2 32.3 4.701 5.398 129 16.2 8.5 286.1 20:38 (180, 52)
Sept.11 19 27.58 2 47.7 4.799 5.408 122 16.2 7.0 287.1 20:07 (180, 52)
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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. 4 4 15.86 45 45.3 1.276 1.635 90 16.2 14.1 316.5 4:52 (186, 9)
Sept.11 4 7.56 46 54.5 1.242 1.703 97 16.2 17.6 302.5 4:42 (181, 8)
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Appearing at dawn, but not yet observed. It will be 16 mag and locale high in next autumn and winter.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Sept. 4 6 42.44 30 1.2 2.638 2.341 62 16.5 26.7 94.2 4:52 (219, 12)
Sept.11 6 56.54 29 44.9 2.566 2.339 65 16.4 25.9 95.7 4:42 (218, 13)
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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. 4 2 10.41 40 54.8 1.395 2.019 113 16.8 17.7 40.1 3:20 (180, 14)
Sept.11 2 17.04 42 27.1 1.304 1.980 117 16.5 16.1 37.4 2:59 (180, 13)
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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. 4 15 16.44 11 56.9 5.894 5.555 65 16.6 8.3 104.4 19:06 (133, 29)
Sept.11 15 20.45 11 42.5 6.003 5.583 60 16.7 9.0 103.1 19:11 (127, 25)
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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. 4 5 52.81 40 11.7 1.970 1.937 73 16.8 31.6 73.5 4:52 (205, 9)
Sept.11 6 11.17 41 10.5 1.922 1.947 76 16.8 30.3 74.5 4:42 (204, 8)
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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. 4 19 41.44 -14 20.1 1.543 2.352 133 17.3 3.2 233.6 20:48 (180, 69)
Sept.11 19 40.97 -14 32.5 1.572 2.316 126 17.3 1.7 158.6 20:20 (180, 70)
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