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Image:
1999 July 31
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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. 21 6 53.47 44 50.0 1.357 1.067 51 7.4 37.4 316.9 3:52 (235, 33)
Aug. 28 6 33.45 48 14.1 1.238 1.165 61 7.7 46.1 312.8 4:00 (234, 43)
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Image:
1999 July 31
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It is one mag brighter than the ephemris. 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. 21 12 41.44 25 40.4 1.447 0.944 40 9.6 29.3 38.8 20:12 (108, 21)
Aug. 28 12 50.12 28 3.7 1.597 1.025 38 10.1 23.9 39.4 20:02 (111, 20)
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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)
Aug. 21 17 30.04 -24 22.2 0.745 1.494 115 9.7 29.8 125.8 20:12 ( 10, 30)
Aug. 28 17 43.60 -26 17.8 0.775 1.486 112 9.7 32.2 119.0 20:02 ( 11, 28)
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Image:
1999 July 31
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Very diffused. 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. 21 8 52.73 55 9.6 1.567 1.108 44 10.9 22.8 198.8 3:52 (216, 20)
Aug. 28 8 46.55 52 27.8 1.447 1.057 46 10.5 26.3 198.6 4:00 (221, 24)
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Image:
1999 July 30
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Too low for the Northern observers. 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. 21 13 47.92 -20 47.0 1.817 1.670 65 11.9 9.7 334.7 20:12 ( 59, 7)
Aug. 28 13 46.62 -19 55.8 2.024 1.717 57 12.3 6.2 348.0 20:02 ( 62, 4)
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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. 21 6 51.29 -66 50.4 9.169 9.158 86 12.4 7.1 144.4 3:52 (335,-27)
Aug. 28 6 55.98 -67 32.1 9.227 9.210 85 12.5 7.1 149.3 4:00 (337,-24)
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Image:
1999 July 30
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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. 21 0 44.89 8 49.2 0.982 1.832 133 12.5 8.4 302.3 2:50 ( 0, 64)
Aug. 28 0 40.66 9 14.1 0.977 1.874 141 12.7 11.0 283.8 2:18 ( 0, 64)
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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. 21 9 34.30 -54 18.3 3.829 3.555 66 12.8 20.5 133.0 3:52 (315,-43)
Aug. 28 9 46.78 -55 59.4 3.821 3.539 66 12.8 21.5 134.1 4:00 (317,-40)
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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. 21 7 44.50 14 47.5 2.733 1.960 32 13.3 33.4 102.7 3:52 (258, 9)
Aug. 28 7 59.88 13 53.9 2.728 1.996 35 13.5 32.3 104.1 4:00 (262, 13)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 21 14 51.71 -25 49.1 6.223 6.142 80 13.9 5.6 91.5 20:12 ( 45, 13)
Aug. 28 14 54.81 -25 51.2 6.328 6.140 74 13.9 6.4 94.1 20:02 ( 47, 11)
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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. 21 10 13.07 7 59.4 4.084 3.079 5 13.9 17.9 140.1 20:12 (114,-19)
Aug. 28 10 18.40 6 24.2 4.150 3.143 3 14.1 17.5 140.4 4:00 (247,-19)
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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. 21 1 5.11 -30 18.9 1.118 1.957 133 14.6 7.7 146.0 3:10 ( 0, 25)
Aug. 28 1 6.56 -31 2.8 1.050 1.917 136 14.3 6.2 170.9 2:44 ( 0, 24)
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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. 21 4 0.27 12 0.9 1.596 1.846 87 14.5 29.5 82.9 3:52 (299, 52)
Aug. 28 4 13.91 12 23.2 1.537 1.846 90 14.4 28.0 84.2 4:00 (305, 56)
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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)
Aug. 21 21 25.91 36 42.8 3.958 4.677 130 14.7 7.9 218.5 23:27 (180, 88)
Aug. 28 21 23.13 35 54.2 3.916 4.652 131 14.6 9.0 211.2 22:57 (180, 89)
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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)
Aug. 21 14 25.13 44 1.8 3.811 3.500 64 14.6 16.8 201.7 20:12 (119, 46)
Aug. 28 14 21.78 42 15.5 3.882 3.501 60 14.7 15.4 196.3 20:02 (118, 43)
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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)
Aug. 21 18 26.21 -23 41.9 3.693 4.395 128 15.3 14.1 226.3 20:28 ( 0, 31)
Aug. 28 18 21.44 -24 48.1 3.752 4.354 120 15.3 12.5 222.4 20:02 ( 2, 30)
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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. 21 5 15.35 37 54.4 2.069 1.923 67 15.3 33.6 71.1 3:52 (250, 49)
Aug. 28 5 34.15 39 6.5 2.019 1.929 70 15.3 32.7 72.3 4:00 (249, 52)
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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. 21 2 4.81 8 33.9 1.926 2.531 115 15.5 9.5 109.7 3:52 (351, 63)
Aug. 28 2 8.47 8 7.3 1.863 2.541 121 15.4 7.9 123.7 3:46 ( 0, 63)
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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)
Aug. 21 15 32.17 50 57.8 7.436 7.263 76 15.5 11.5 181.5 20:12 (132, 58)
Aug. 28 15 32.27 49 37.7 7.467 7.254 73 15.5 11.4 177.1 20:02 (128, 55)
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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. 21 5 20.62 46 42.9 2.555 2.353 67 15.6 23.9 67.3 3:52 (237, 49)
Aug. 28 5 35.37 47 45.1 2.515 2.382 70 15.7 22.5 67.2 4:00 (235, 52)
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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)
Aug. 21 18 18.62 37 42.5 1.739 2.269 108 15.8 2.8 116.7 20:21 (180, 87)
Aug. 28 18 20.89 37 28.0 1.786 2.281 105 15.8 6.0 118.4 20:02 (155, 87)
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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. 21 4 22.92 43 18.9 1.333 1.485 77 16.1 10.6 352.3 3:52 (243, 59)
Aug. 28 4 20.79 44 32.5 1.308 1.562 83 16.2 11.7 333.5 4:00 (238, 65)
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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. 21 19 40.00 1 53.9 4.538 5.378 142 16.1 11.3 286.3 21:42 ( 0, 57)
Aug. 28 19 35.22 2 14.5 4.614 5.388 136 16.1 10.0 285.9 21:09 ( 0, 57)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 21 15 46.82 -15 49.8 9.536 9.599 90 16.3 2.3 107.5 20:12 ( 40, 29)
Aug. 28 15 48.02 -15 55.0 9.661 9.610 84 16.3 2.9 106.2 20:02 ( 43, 27)
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Image:
1999 June 14
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Ageo Survey Team failed to catch it on July 31. Probably it have faded out.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Aug. 21 18 23.47 -17 48.2 2.643 3.360 127 16.5 1.8 140.7 20:26 ( 0, 37)
Aug. 28 18 24.50 -17 57.8 2.755 3.393 121 16.6 3.3 113.7 20:02 ( 1, 37)
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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. 21 15 9.54 12 25.1 5.665 5.500 75 16.5 6.7 106.8 20:12 ( 72, 43)
Aug. 28 15 12.80 12 11.2 5.781 5.527 70 16.5 7.5 105.6 20:02 ( 75, 41)
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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. 21 6 12.99 30 19.9 2.777 2.348 55 16.6 27.9 91.1 3:52 (255, 35)
Aug. 28 6 27.90 30 13.1 2.708 2.344 58 16.6 27.3 92.7 4:00 (257, 39)
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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. 21 16 41.14 -10 43.6 1.255 1.774 102 17.0 1.5 290.2 20:12 ( 29, 40)
Aug. 28 16 41.50 -10 42.7 1.266 1.700 95 16.6 2.9 94.5 20:02 ( 34, 38)
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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. 21 4 50.06 22 19.7 3.263 3.133 73 16.8 11.2 79.9 3:52 (275, 48)
Aug. 28 4 55.23 22 32.5 3.200 3.171 79 16.8 9.6 79.7 4:00 (280, 55)
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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. 21 1 54.93 37 37.4 1.589 2.100 105 17.3 20.2 44.1 3:52 (208, 87)
Aug. 28 2 2.98 39 17.8 1.490 2.059 109 17.1 19.1 42.3 3:40 (180, 86)
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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. 21 18 30.01 -0 18.6 5.218 5.881 126 17.3 13.9 257.0 20:32 ( 0, 55)
Aug. 28 18 24.03 -0 41.0 5.301 5.865 119 17.3 12.5 254.9 20:02 ( 1, 54)
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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. 21 19 46.71 -13 51.2 1.510 2.426 147 17.3 8.4 255.1 21:48 ( 0, 41)
Aug. 28 19 43.41 -14 6.1 1.522 2.389 140 17.3 5.9 249.3 21:18 ( 0, 41)
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