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Image:
1999 May 7
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In the Northern Hemisphere, it will be in the evening sky as 7 mag until mid June. Then it will appear at dawn as 7 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)
May 29 8 37.58 0 36.6 1.015 1.100 65 7.4 72.3 345.2 20:49 ( 79, 17)
June 5 8 30.10 7 45.8 1.155 1.005 54 7.3 55.6 345.4 20:55 ( 91, 13)
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Image:
1999 May 7
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It was 13.2 mag by CCD on May 7 and 13.0 mag even visually on May 15. So it must be about 3 mag fainter than this ephemeris. It will close down to about 1 deg to 37P/Forbes on May 31 at 22h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 23 27.56 -8 37.4 1.358 1.518 78 9.5 25.1 214.1 3:06 (296, 19)
June 5 23 18.65 -11 37.0 1.135 1.496 88 9.0 39.9 217.9 3:01 (304, 23)
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Image:
1999 Feb. 6
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Mother asteroid of Geminids. Although it will be bright as 10 mag in June at around the perihelion passage, it is too close to the sun and not observable. It will appear at dawn as 14 mag in late June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 5 15.87 19 47.4 1.311 0.394 12 13.2 48.2 97.7 20:49 (123,-11)
June 5 5 33.71 19 25.6 1.038 0.191 10 11.1 9.6 357.8 20:55 (126,-14)
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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)
May 29 3 58.20 16 56.2 2.674 1.673 7 11.5 42.8 81.9 3:06 (233,-18)
June 5 4 18.86 17 33.1 2.679 1.684 8 11.6 42.4 83.7 3:01 (233,-17)
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Image:
1999 May 7
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In the Northern Hemisphere, it gets low in late June. 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)
May 29 8 59.14 33 12.4 2.651 2.346 61 11.8 28.8 155.7 20:49 (107, 38)
June 5 9 5.72 30 16.6 2.799 2.403 57 12.0 26.9 153.1 20:55 (107, 31)
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Only southern people can observe it. Norhtern 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)
May 29 5 36.56 -62 57.0 8.530 8.516 85 12.0 6.3 83.5 20:49 ( 34,-42)
June 5 5 43.05 -62 54.1 8.581 8.570 86 12.0 6.4 89.2 20:55 ( 33,-45)
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Image:
1999 May 7
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Beginning to be higher in the Northern Hemisphere. It will be 13-14 mag until September under good condition. It will close down to about 1 deg to C/1998 T1 (LINEAR) on May 31 at 22h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 23 14.70 -9 47.3 1.226 1.470 81 13.0 39.7 61.0 3:06 (299, 21)
June 5 23 30.53 -7 34.1 1.202 1.486 83 13.0 37.4 59.9 3:01 (299, 23)
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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)
May 29 7 59.13 -44 52.2 3.816 3.824 82 13.2 5.7 85.0 20:49 ( 47,-17)
June 5 8 3.31 -44 52.5 3.831 3.797 80 13.2 7.0 95.0 20:55 ( 50,-22)
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Image:
1999 Apr. 16
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In May, the diffused coma was 14 mag totally, the nucleus was 17 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 14 53.72 -28 4.5 5.206 6.164 159 13.5 6.2 293.6 22:26 ( 0, 27)
June 5 14 50.86 -27 46.7 5.244 6.162 152 13.5 5.7 296.8 21:56 ( 0, 27)
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Image:
1999 Apr. 14
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It is getting brighter. It was about 15 mag in mid May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 17 28.19 -4 18.8 0.818 1.793 156 14.3 6.9 259.2 1:05 ( 0, 51)
June 5 17 24.41 -4 36.2 0.769 1.758 160 14.0 10.0 248.0 0:34 ( 0, 50)
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Image:
1999 May 7
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It will be too low to observe in June. 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)
May 29 8 41.05 9 1.4 2.527 2.262 63 14.1 28.8 112.1 20:49 ( 85, 23)
June 5 8 53.66 7 44.6 2.613 2.285 60 14.2 29.0 112.5 20:55 ( 87, 18)
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Image:
1998 Dec. 13
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Although it is getting higher in the morning sky, it will be only 18 deg high in July 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)
May 29 23 25.33 -27 48.5 5.091 5.137 86 14.3 9.9 153.8 3:06 (310, 6)
June 5 23 27.36 -28 53.3 5.030 5.185 93 14.4 10.2 161.3 3:01 (315, 9)
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Image:
1999 May 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.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 17 55.41 56 5.4 3.253 3.570 99 14.4 31.3 294.5 1:33 (180, 69)
June 5 17 30.24 57 19.3 3.240 3.556 99 14.4 31.5 285.5 0:40 (180, 68)
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Not yet observed in this return. Although it is not observable now, we can observe it for a while as 15-16 mag after appearing again at dawn as 15 mag in June. But it should be muyh 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)
May 29 2 9.80 27 53.1 2.879 2.071 30 15.0 34.2 58.3 3:06 (242, 8)
June 5 2 25.26 29 56.3 2.861 2.088 33 15.1 33.7 59.0 3:01 (241, 11)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 9 9.12 16 24.9 2.128 1.977 67 15.1 33.4 109.9 20:49 ( 88, 33)
June 5 9 24.42 15 2.8 2.190 1.984 64 15.2 33.9 110.7 20:55 ( 89, 28)
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Image:
1999 Jan. 16
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Only southern people can observe it. It will appear at dawn also for Norhtern observers. The brightness after late February is unknown.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 17 59.46 -55 25.0 1.277 2.165 141 15.1 55.1 295.0 1:38 ( 0, -1)
June 5 17 22.12 -52 13.0 1.324 2.258 149 15.3 53.5 304.2 0:33 ( 0, 3)
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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.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 16 36.68 63 18.1 7.385 7.544 95 15.6 9.9 252.3 0:14 (180, 62)
June 5 16 27.03 62 52.4 7.390 7.538 94 15.6 10.2 245.2 23:31 (180, 62)
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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)
May 29 21 36.92 34 45.7 5.136 5.174 86 15.7 7.6 33.9 3:06 (261, 64)
June 5 21 39.05 35 28.5 5.046 5.155 90 15.6 6.7 28.4 3:01 (261, 68)
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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)
May 29 0 55.71 0 31.1 2.414 2.001 54 15.9 34.8 70.9 3:06 (275, 7)
June 5 1 11.15 1 49.9 2.339 1.979 56 15.8 35.0 71.5 3:01 (275, 10)
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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)
May 29 19 40.58 -10 7.8 4.193 4.918 131 16.0 10.0 228.8 3:06 (356, 45)
June 5 19 36.63 -10 56.7 4.065 4.874 138 15.9 11.8 231.0 2:45 ( 0, 44)
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Image:
1999 Apr. 14
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It was about 16.5 mag in March and April, 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)
May 29 15 55.90 -16 12.5 8.464 9.468 171 16.0 4.3 284.5 23:28 ( 0, 39)
June 5 15 53.89 -16 5.2 8.494 9.479 165 16.0 4.2 284.0 22:59 ( 0, 39)
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Image:
1999 May 7
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Fading as expected. It will close down to 13 arcmin to C/1999 K6 (LINEAR) on June 1 at 0h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 19 9.01 16 19.5 1.830 2.542 124 16.1 44.3 261.9 2:46 ( 0, 71)
June 5 18 47.18 15 24.0 1.823 2.618 132 16.2 46.9 258.3 1:57 ( 0, 70)
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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 was just 18 arcmin from C/1999 K6 (LINEAR) on May 20 at 22h (UT). It will close down to 13 arcmin to C/1998 U5 (LINEAR) on June 1 at 0h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 19 1.03 14 11.3 1.586 2.341 127 16.2 32.6 355.3 2:37 ( 0, 69)
June 5 18 59.10 17 57.2 1.546 2.320 128 16.1 32.3 350.8 2:08 ( 0, 73)
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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)
May 29 1 49.11 16 7.3 2.731 2.008 36 16.2 35.8 59.2 3:06 (254, 5)
June 5 2 4.24 18 15.1 2.673 1.990 39 16.1 36.1 59.6 3:01 (253, 8)
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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)
May 29 0 20.63 4 33.1 2.840 2.506 60 16.3 25.4 73.1 3:06 (276, 17)
June 5 0 31.87 5 22.9 2.764 2.501 64 16.2 24.7 73.9 3:01 (277, 20)
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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)
May 29 13 34.57 78 7.8 2.073 2.102 77 16.8 32.2 281.6 21:03 (180, 47)
June 5 12 23.85 78 8.2 2.079 2.023 72 16.6 29.9 261.0 20:55 (173, 46)
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New comet. Although it is very high, it fades out rapidly as 17.5 mag in late June, 18.5 mag in late July. It was just 18 arcmin from C/1999 K6 (LINEAR) on May 20 at 22h (UT).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 18 41.28 15 37.7 1.433 2.220 129 16.7 57.6 318.9 2:18 ( 0, 70)
June 5 18 22.17 20 24.6 1.458 2.263 131 16.9 55.1 314.2 1:32 ( 0, 75)
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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)
May 29 20 44.74 -6 37.5 4.786 5.293 114 17.1 10.4 322.1 3:06 (333, 45)
June 5 20 41.41 -5 40.6 4.675 5.282 121 17.1 11.3 315.8 3:01 (342, 48)
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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)
May 29 0 20.42 56 36.0 4.450 3.973 55 17.2 16.6 48.0 3:06 (222, 38)
June 5 0 30.68 57 52.5 4.468 4.021 57 17.3 15.7 46.5 3:01 (220, 40)
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It was observed for the first time in this return on Apr. 12, but the brightness is unknown. Now is the peak on the brightness.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 18 7.87 -7 39.7 1.128 2.072 150 17.5 8.0 313.8 1:44 ( 0, 47)
June 5 18 4.61 -7 5.1 1.114 2.084 156 17.5 9.0 298.4 1:14 ( 0, 48)
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Image:
1999 Apr. 29
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Fading as expected. It will be too low to observe in mid June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 9 42.29 10 52.9 2.065 2.085 76 17.6 29.5 115.2 20:49 ( 77, 36)
June 5 9 54.94 9 24.8 2.166 2.119 73 17.8 29.5 115.3 20:55 ( 79, 31)
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It was 17.5 mag on May 13. It seems to be fading a bit rapidly.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 22 11.34 9 33.3 3.601 3.722 88 17.7 11.4 36.7 3:06 (295, 45)
June 5 22 14.21 10 35.7 3.545 3.757 94 17.7 10.2 31.4 3:01 (299, 50)
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No observations reported since last May, although it is already high enough for observation.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 19 0.34 -16 55.1 2.130 2.997 142 17.8 4.9 283.3 2:37 ( 0, 38)
June 5 18 57.58 -16 48.7 2.106 3.025 149 17.8 6.6 276.2 2:06 ( 0, 38)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 12 47.82 -6 24.7 4.165 4.834 126 17.9 10.7 241.3 20:49 ( 10, 48)
June 5 12 43.83 -7 1.2 4.286 4.858 118 18.0 9.3 235.1 20:55 ( 23, 45)
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New comet. It will be 18.0 mag at 60 deg high in next winter 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)
May 29 15 23.26 47 38.0 3.629 4.083 109 18.2 22.6 290.6 22:55 (180, 77)
June 5 15 8.74 48 23.1 3.671 4.063 105 18.2 21.0 284.1 22:13 (180, 77)
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New comet. It fades out rapidly as 19 mag in late June, 20 mag in late July.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 18 10.09 18 37.5 1.757 2.548 131 18.3 55.3 263.0 1:48 ( 0, 74)
June 5 17 42.52 17 32.9 1.739 2.584 137 18.3 58.0 258.7 0:53 ( 0, 73)
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Image:
1999 Jan. 30
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A Centaur asteroid. The perihelion passage is in 1991. It will keep 18 mag until around 2000.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
May 29 14 8.91 14 46.2 13.462 14.150 131 18.4 2.4 260.4 21:42 ( 0, 70)
June 5 14 7.85 14 42.5 13.555 14.169 125 18.4 2.1 251.7 21:13 ( 0, 70)
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