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Image:
1999 June 12
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After rapid brightening, it suddenly stopped being brighter. Now it is not observable. It will appear at dawn as 6 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)
July 10 7 57.81 28 26.8 1.676 0.708 11 6.7 29.8 329.2 21:01 (133, -7)
July 17 7 49.31 31 19.0 1.696 0.718 10 6.7 28.7 325.7 20:56 (140, -9)
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Image:
1999 June 14
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It will fade out rapidly after this. It is now in the evening sky. But in the Northern Hemisphere, it reaches only 16 deg high around July 20, then it will be lower. So people can observe it only until mid August. After conjunction, it appears again at dawn as 16 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)
July 10 16 29.10 -44 49.4 0.555 1.483 139 9.1 197.6 288.6 21:08 ( 0, 11)
July 17 15 4.92 -36 40.3 0.720 1.500 118 9.8 113.5 303.8 20:56 ( 20, 16)
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Image:
1999 June 12
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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)
July 10 17 1.45 -10 57.3 0.654 1.602 146 10.7 18.1 196.1 21:49 ( 0, 44)
July 17 17 0.08 -13 4.6 0.656 1.577 140 10.4 18.9 181.9 21:20 ( 0, 42)
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Image:
1999 June 14
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It suddenly became 2 mag brighter in June. Now it reaches to 11 mag. 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)
July 10 0 29.67 2 9.2 1.089 1.610 99 11.6 22.3 51.2 3:09 (310, 45)
July 17 0 36.94 3 42.3 1.067 1.643 104 11.8 18.6 47.3 3:15 (316, 50)
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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)
July 10 6 16.10 -63 43.9 8.837 8.839 86 12.2 6.8 115.3 3:09 (328,-44)
July 17 6 22.53 -64 6.2 8.890 8.893 86 12.2 6.9 120.3 3:15 (328,-41)
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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)
July 10 5 59.18 18 16.9 2.715 1.779 18 12.2 39.1 92.8 3:09 (240, -9)
July 17 6 18.14 17 59.1 2.722 1.804 20 12.4 38.3 94.6 3:15 (243, -6)
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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)
July 10 8 35.02 -46 59.5 3.865 3.673 71 13.0 13.5 120.2 21:01 ( 55,-41)
July 17 8 43.28 -47 51.2 3.863 3.651 70 13.0 14.7 123.2 20:56 ( 54,-43)
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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)
July 10 9 37.82 18 35.0 3.490 2.702 33 13.0 21.2 143.4 21:01 (110, 4)
July 17 9 44.01 16 38.4 3.610 2.763 28 13.2 20.6 142.2 20:56 (111, -1)
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Image:
1999 June 12
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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)
July 10 14 43.30 -26 24.9 5.600 6.153 118 13.7 1.9 348.3 21:01 ( 22, 25)
July 17 14 43.38 -26 13.2 5.696 6.151 112 13.7 1.7 24.4 20:56 ( 27, 23)
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Image:
1999 June 14
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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)
July 10 15 27.07 55 9.2 3.393 3.519 88 14.4 26.4 240.4 21:01 (161, 68)
July 17 15 10.00 53 29.7 3.453 3.513 84 14.4 24.8 232.8 20:56 (147, 66)
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Image:
1998 Dec. 13
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Although it is highest now, the altitude is only 18 deg.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 23 27.90 -35 29.4 4.790 5.426 124 14.4 12.9 193.2 3:09 (345, 18)
July 17 23 25.84 -36 57.6 4.768 5.474 129 14.5 13.3 198.3 3:15 (353, 18)
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Image:
1999 May 12
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Not observable. 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)
July 10 9 56.37 0 57.3 3.033 2.417 44 14.7 29.2 114.5 21:01 ( 93, -3)
July 17 10 8.72 -0 28.0 3.113 2.448 41 14.9 29.1 114.9 20:56 ( 93, -6)
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Image:
1999 Feb. 6
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Mother asteroid of Geminids. Although it appears at dawn, it will fade out rapidly.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 4 2.82 35 43.8 1.267 0.880 43 14.8 15.0 33.6 3:09 (241, 22)
July 17 4 7.86 37 7.2 1.314 1.003 48 15.2 14.4 37.5 3:15 (243, 28)
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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)
July 10 2 29.52 7 41.0 1.980 1.891 69 15.1 34.5 75.5 3:09 (280, 27)
July 17 2 45.21 8 38.6 1.912 1.878 72 15.0 34.1 76.6 3:15 (282, 31)
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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)
July 10 3 45.11 38 55.4 2.750 2.194 47 15.3 30.3 63.5 3:09 (240, 27)
July 17 4 1.38 40 26.6 2.723 2.219 50 15.4 29.4 64.4 3:15 (240, 31)
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Image:
1999 June 14
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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)
July 10 21 40.74 37 58.7 4.624 5.073 110 15.4 2.9 319.2 2:31 (180, 87)
July 17 21 39.38 38 10.0 4.549 5.058 114 15.3 2.9 291.3 2:03 (180, 87)
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Image:
1999 June 14
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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)
July 10 19 6.62 -16 19.1 3.644 4.656 173 15.5 18.2 234.4 23:53 ( 0, 39)
July 17 18 59.35 -17 34.1 3.611 4.613 168 15.4 18.5 234.1 23:18 ( 0, 37)
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Image:
1999 June 14
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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. 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)
July 10 18 35.49 32 57.1 1.526 2.257 123 15.5 19.9 329.4 23:22 ( 0, 88)
July 17 18 30.05 34 43.2 1.550 2.252 121 15.5 16.0 325.5 22:49 ( 0, 90)
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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)
July 10 18 36.25 -16 54.6 2.166 3.171 169 15.5 8.8 264.2 23:23 ( 0, 38)
July 17 18 32.20 -17 1.6 2.217 3.202 162 15.6 7.8 261.9 22:52 ( 0, 38)
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Image:
1999 June 14
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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. 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)
July 10 15 48.28 58 38.0 7.282 7.326 88 15.5 11.4 212.5 21:01 (172, 66)
July 17 15 43.31 57 28.2 7.303 7.316 86 15.5 11.5 206.7 20:56 (163, 66)
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Image:
1999 June 12
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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)
July 10 9 39.96 69 2.8 2.066 1.640 51 15.7 19.7 206.9 21:01 (156, 29)
July 17 9 30.04 67 2.0 2.040 1.568 48 15.5 18.3 203.1 20:56 (155, 26)
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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)
July 10 3 25.70 28 22.1 2.387 1.930 51 15.7 36.4 63.6 3:09 (252, 26)
July 17 3 43.21 30 12.4 2.331 1.923 54 15.6 36.2 64.7 3:15 (252, 30)
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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)
July 10 1 23.10 8 25.7 2.372 2.498 84 15.8 19.7 80.4 3:09 (291, 40)
July 17 1 31.94 8 45.4 2.293 2.500 89 15.8 18.2 82.6 3:15 (296, 45)
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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)
July 10 0 27.60 -26 59.3 1.648 2.213 110 16.3 17.4 97.4 3:09 (329, 21)
July 17 0 36.30 -27 18.2 1.547 2.169 113 16.0 16.2 101.3 3:15 (335, 23)
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Image:
1999 June 14
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New comet. 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)
July 10 14 59.86 13 8.4 4.938 5.342 108 16.0 0.4 13.3 21:01 ( 42, 63)
July 17 15 0.18 13 8.9 5.057 5.368 102 16.1 1.3 100.4 20:56 ( 50, 59)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 15 46.39 -15 41.2 8.842 9.533 130 16.1 1.9 279.4 21:01 ( 8, 39)
July 17 15 45.65 -15 39.7 8.944 9.544 123 16.1 1.2 276.2 20:56 ( 15, 38)
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New comet. Northern people can observe it only until late July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 16 8.21 -2 35.6 1.106 1.928 130 16.6 42.7 190.6 21:01 ( 2, 52)
July 17 16 5.45 -7 28.2 1.136 1.915 125 16.6 41.6 185.3 20:56 ( 11, 47)
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Image:
1999 May 31
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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)
July 10 20 15.33 -1 16.1 4.297 5.233 154 16.9 15.3 296.2 1:06 ( 0, 54)
July 17 20 8.80 -0 30.5 4.266 5.224 158 16.8 15.5 293.8 0:32 ( 0, 54)
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Image:
1999 Jan. 16
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Appearing to be in the morning sky. The brightness after late February is unknown. One reported that it is too faint to catch by CCD now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 15 54.76 -34 34.9 1.896 2.710 134 16.9 25.7 334.8 21:01 ( 4, 20)
July 17 15 49.88 -32 4.5 2.062 2.797 127 17.2 20.8 341.3 20:56 ( 11, 22)
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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)
July 10 4 39.66 29 4.9 3.152 2.398 35 17.1 29.6 81.7 3:09 (243, 12)
July 17 4 55.35 29 31.7 3.094 2.387 38 17.0 29.5 83.2 3:15 (245, 16)
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Image:
1999 June 4
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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)
July 10 17 8.88 6 37.6 2.164 2.994 137 17.1 35.4 241.0 21:55 ( 0, 61)
July 17 16 55.58 4 39.0 2.301 3.069 131 17.4 30.6 237.2 21:15 ( 0, 60)
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New comet. Although it keeps 18 mag until the end of 2000, it is higher than 40 deg only until late July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 16 10.47 -9 57.9 2.939 3.720 134 17.5 5.3 225.9 21:01 ( 1, 45)
July 17 16 9.08 -10 25.2 3.014 3.721 127 17.6 4.6 206.6 20:56 ( 9, 44)
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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)
July 10 1 13.02 63 41.0 4.498 4.265 70 17.6 11.0 34.2 3:09 (209, 51)
July 17 1 19.00 64 42.9 4.494 4.314 73 17.6 10.0 29.9 3:15 (205, 53)
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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)
July 10 20 18.46 -12 51.8 1.674 2.660 162 17.7 9.6 269.9 1:10 ( 0, 42)
July 17 20 13.47 -12 54.0 1.615 2.620 168 17.6 11.1 266.8 0:37 ( 0, 42)
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New retrograde asteroid. It will be overhead as 17 mag between 2000 January and March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
July 10 14 52.58 5 22.5 2.213 2.735 110 17.8 32.5 275.4 21:01 ( 37, 55)
July 17 14 38.66 5 38.3 2.320 2.700 100 17.9 27.1 273.2 20:56 ( 50, 50)
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