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Image:
1999 July 29
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Observed by Ageo Survey team on July 27. The CCD images show the narrow tail and 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)
Aug. 7 7 20.15 39 7.8 1.561 0.888 32 7.0 28.9 321.0 5:23 (230,-11)
Aug. 14 7 8.24 41 50.5 1.467 0.974 41 7.1 32.0 319.5 5:17 (223, -8)
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Image:
1999 July 24
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New comet. Appearing at dusk even in the Northerm Hemisphere. It is brighter than expected. It will keep over 20 deg high in the evening sky in August in the Northern Hemisphere, although it set down under the horizon in the Southern Hemisphere. After that, it is alwasy 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)
Aug. 7 12 15.96 18 33.3 1.099 0.815 45 8.3 54.4 40.9 18:48 (128, 16)
Aug. 14 12 30.66 22 38.1 1.280 0.872 42 8.9 38.5 39.3 18:52 (128, 10)
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Image:
1999 June 12
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Bright as 11 mag visually, but 14 mag by CCD. It will close to the earth down to 0.4 AU in October and reach to 8 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)
Aug. 7 9 4.28 59 46.5 1.760 1.234 43 9.6 19.6 198.5 5:23 (217,-35)
Aug. 14 8 58.57 57 33.2 1.671 1.167 43 9.3 20.7 198.6 5:17 (218,-31)
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Image:
1999 June 30
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11 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)
Aug. 7 17 10.30 -20 0.1 0.695 1.518 124 9.9 24.6 143.4 20:08 (180, 75)
Aug. 14 17 18.89 -22 15.2 0.718 1.504 119 9.8 27.2 133.9 19:49 (180, 77)
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Image:
1999 June 30
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It was brighter than the ephemeris in July. Northern people can observe it only until mid August. After conjunction, it appears again at dawn as 15 mag in December. On the other hand, it keeps high until late August in the Southern Hemisphere.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 13 56.81 -23 48.0 1.377 1.587 81 11.1 23.9 320.5 18:48 (107, 63)
Aug. 14 13 50.98 -22 0.7 1.601 1.626 73 11.5 15.1 326.3 18:52 (101, 54)
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Image:
1999 July 8
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12 mag visually. 14 mag by CCD. The condition keeps good until September.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 0 47.68 7 21.2 1.007 1.752 120 12.2 8.2 9.4 3:48 (180, 48)
Aug. 14 0 47.29 8 11.5 0.992 1.792 126 12.3 7.0 334.5 3:20 (180, 47)
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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)
Aug. 7 6 40.66 -65 35.0 9.055 9.052 86 12.4 7.1 134.7 5:23 (330, 42)
Aug. 14 6 46.16 -66 11.2 9.111 9.105 86 12.4 7.1 139.6 5:17 (331, 43)
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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)
Aug. 7 9 11.82 -51 18.7 3.846 3.590 67 12.9 18.3 129.9 18:48 ( 41, 21)
Aug. 14 9 22.68 -52 44.6 3.838 3.572 67 12.8 19.4 131.6 5:17 (320, 22)
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Image:
1998 Dec. 13
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Appearing over horizon at dawn, but it is too low to observe until September.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 7 11.77 16 21.7 2.735 1.893 27 12.9 35.5 99.7 5:23 (246, 5)
Aug. 14 7 28.46 15 37.0 2.736 1.926 29 13.1 34.4 101.2 5:17 (246, 6)
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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)
Aug. 7 10 1.88 11 17.0 3.923 2.952 14 13.7 18.9 140.2 18:48 (101, -4)
Aug. 14 10 7.56 9 36.9 4.008 3.015 9 13.8 18.4 140.0 18:52 ( 96, -8)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 14 46.87 -25 51.7 6.009 6.145 92 13.8 3.8 82.1 18:48 (120, 74)
Aug. 14 14 49.05 -25 49.2 6.116 6.143 86 13.8 4.7 87.8 18:52 (108, 68)
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Image:
1999 July 8
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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. It is 13 mag visually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 14 36.43 47 48.3 3.664 3.502 72 14.6 19.8 213.2 18:48 (168, 6)
Aug. 14 14 29.91 45 53.3 3.738 3.500 68 14.6 18.2 207.3 18:52 (161, 5)
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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.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 3 31.28 10 58.1 1.718 1.853 80 14.7 31.9 80.3 5:23 (202, 41)
Aug. 14 3 46.02 11 32.6 1.656 1.848 83 14.6 30.8 81.6 5:17 (200, 41)
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Image:
1999 July 8
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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)
Aug. 7 21 31.73 37 48.7 4.069 4.728 125 14.8 5.8 236.4 0:32 (180, 17)
Aug. 14 21 28.83 37 21.1 4.009 4.702 128 14.7 6.9 226.7 0:02 (180, 18)
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Not yet observed in this return. Now is the chance for the first observation. It will keep around 25 deg high until October when it becomes 12.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 0 57.28 -28 52.6 1.273 2.039 125 15.2 11.6 119.6 3:57 (180, 84)
Aug. 14 1 1.95 -29 34.5 1.192 1.998 129 14.9 9.6 130.3 3:34 (180, 85)
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Image:
1999 June 14
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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)
Aug. 7 18 38.04 -21 20.4 3.612 4.478 144 15.3 16.8 231.2 21:35 (180, 76)
Aug. 14 18 31.78 -22 32.5 3.646 4.436 136 15.3 15.5 229.2 21:01 (180, 78)
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Not yet observed in this return. We can observe it as 15 mag from summer though winter under good condition. However, maybe it is much fainter actually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 4 37.83 35 9.3 2.171 1.917 61 15.4 35.1 68.4 5:23 (208, 13)
Aug. 14 4 56.54 36 35.3 2.119 1.919 64 15.4 34.4 69.7 5:17 (207, 12)
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Image:
1999 July 8
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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. Visual observers reported it as 14 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 15 34.09 53 38.5 7.376 7.281 80 15.5 11.6 191.0 18:48 (178, 1)
Aug. 14 15 32.75 52 18.3 7.405 7.272 78 15.5 11.6 186.2 18:52 (172, 2)
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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)
Aug. 7 4 49.70 44 27.0 2.628 2.297 60 15.5 26.3 66.7 5:23 (205, 4)
Aug. 14 5 5.36 45 37.1 2.592 2.325 63 15.6 25.1 67.1 5:17 (204, 3)
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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)
Aug. 7 1 54.31 9 2.1 2.065 2.515 104 15.6 13.2 93.6 4:54 (180, 46)
Aug. 14 2 0.07 8 52.1 1.993 2.523 109 15.5 11.3 100.2 4:32 (180, 46)
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Image:
1999 July 8
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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. It is 14.5 mag visually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 18 18.97 37 30.6 1.652 2.252 113 15.6 4.4 317.5 21:16 (180, 17)
Aug. 14 18 17.99 37 44.4 1.694 2.259 110 15.7 0.8 337.8 20:48 (180, 17)
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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)
Aug. 7 4 20.76 40 52.4 1.361 1.314 65 15.9 11.4 23.4 5:23 (202, 9)
Aug. 14 4 22.76 42 5.5 1.352 1.402 71 16.0 10.6 9.9 5:17 (198, 10)
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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)
Aug. 7 19 51.09 1 2.6 4.427 5.360 154 16.0 13.4 288.2 22:48 (180, 54)
Aug. 14 19 45.32 1 30.1 4.475 5.369 148 16.1 12.5 287.1 22:14 (180, 53)
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Image:
1999 June 14
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About 3 mag brighter than expected based on the pre-perihelion observations.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 18 24.27 -17 28.5 2.442 3.296 141 16.1 3.1 243.1 21:21 (180, 72)
Aug. 14 18 23.39 -17 38.4 2.538 3.328 134 16.3 1.6 209.9 20:53 (180, 73)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 15 45.37 -15 42.3 9.288 9.576 103 16.2 0.9 114.8 18:48 (176, 71)
Aug. 14 15 45.93 -15 45.5 9.411 9.587 96 16.2 1.6 109.7 18:52 (155, 69)
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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)
Aug. 7 15 4.33 12 49.4 5.423 5.446 85 16.3 4.7 108.5 18:48 (165, 41)
Aug. 14 15 6.71 12 38.0 5.545 5.473 80 16.4 5.7 107.8 18:52 (156, 39)
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Appearing at dawn. 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)
Aug. 7 5 42.34 30 17.7 2.910 2.360 48 16.8 28.8 87.9 5:23 (222, 10)
Aug. 14 5 57.78 30 21.6 2.844 2.353 51 16.7 28.4 89.5 5:17 (221, 10)
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Image:
1999 Feb. 6
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Appearing at dawn. It is probably much fainter than the ephemris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 4 37.51 21 48.4 3.377 3.057 63 16.7 14.1 79.5 5:23 (214, 25)
Aug. 14 4 44.14 22 5.1 3.323 3.095 68 16.8 12.7 79.8 5:17 (211, 26)
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New comet. We can observe it as 17.5 mag until October. After conjunction, we can observe it again as 17 mag in spring and autumn in 2000.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 18 43.88 0 21.7 5.090 5.913 141 17.3 16.3 260.9 21:40 (180, 55)
Aug. 14 18 36.65 0 2.5 5.147 5.897 134 17.3 15.2 259.0 21:06 (180, 55)
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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.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 7 16 46.65 -11 3.0 1.233 1.920 116 17.6 10.5 282.8 19:44 (180, 66)
Aug. 14 16 42.84 -10 50.1 1.244 1.848 109 17.3 6.0 283.3 19:13 (180, 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)
Aug. 7 19 56.39 -13 22.1 1.516 2.503 162 17.4 11.7 260.6 22:53 (180, 68)
Aug. 14 19 51.14 -13 36.2 1.507 2.464 155 17.3 10.4 258.3 22:20 (180, 69)
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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)
Aug. 7 1 37.50 34 10.7 1.797 2.183 97 17.9 21.9 47.0 4:37 (180, 21)
Aug. 14 1 46.41 35 54.8 1.691 2.141 101 17.6 21.2 45.6 4:18 (180, 19)
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