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Image:
1999 Dec. 23
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The component A has brightened rapidly and observed as 11 mag visually. On the other hand, the component D has been very diffused, about to disappearing.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 22 44.57 -13 58.2 0.384 0.843 57 10.9 126.5 94.2 21:03 ( 87, 21)
Jan. 8 23 52.73 -14 43.8 0.337 0.901 66 11.2 156.1 91.1 21:02 ( 93, 30)
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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)
Jan. 1 17 15.80 -22 48.0 2.385 1.500 20 11.8 47.8 100.0 3:03 (302, -4)
Jan. 8 17 39.77 -23 38.6 2.371 1.501 21 11.8 47.6 97.7 3:10 (301, -2)
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Image:
1999 Dec. 21
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Rapidly brightening. It will be 11 mag in January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 11 46.28 -1 26.5 1.531 1.989 102 12.2 41.6 302.4 3:03 (228, 46)
Jan. 8 11 26.83 1 36.0 1.360 1.989 115 11.9 57.4 301.7 3:10 (208, 50)
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Image:
1999 Oct. 24
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Only southern people can observe it. Northern people can never see it again. Fading our very slowly after the approach to the earth.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 0 8.22 -65 56.2 2.102 1.916 65 12.0 11.1 8.8 21:03 ( 29, 46)
Jan. 8 0 11.38 -64 44.1 2.242 2.002 63 12.3 10.4 22.0 21:02 ( 31, 44)
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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)
Jan. 1 19 40.49 -71 11.8 4.018 3.451 48 12.7 23.7 54.0 21:03 ( 18, 24)
Jan. 8 20 6.02 -69 31.1 4.040 3.458 47 12.8 23.0 51.0 21:02 ( 19, 23)
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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)
Jan. 1 5 28.08 -77 52.9 10.285 10.134 78 13.1 5.9 282.1 22:44 ( 0, 47)
Jan. 8 5 15.77 -77 40.8 10.335 10.184 78 13.2 5.8 292.0 22:05 ( 0, 47)
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Image:
1999 Dec. 23
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It has got diffused in December and now fading rapidly.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 20 27.66 53 37.4 1.916 1.995 79 13.9 7.1 26.8 21:03 (134,-39)
Jan. 8 20 30.66 54 31.0 1.972 2.022 78 14.3 9.9 25.5 21:02 (135,-42)
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Image:
1999 June 12
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Appearing at dawn, however, it is too low to observe.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 16 31.96 -29 33.8 6.936 6.104 29 14.1 11.0 100.2 3:03 (301, 7)
Jan. 8 16 37.68 -29 47.2 6.874 6.102 35 14.1 10.6 100.3 3:10 (298, 13)
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Image:
1999 Dec. 23
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It will be 3 mag in 2000 July. It keeps a good position until 2000 February when it will be 13 mag. It keeps the same brightness recently.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 2 14.73 32 21.2 2.643 3.258 120 14.2 23.7 245.4 21:03 (160, 19)
Jan. 8 2 3.74 31 12.4 2.679 3.175 111 14.2 20.8 242.4 21:02 (151, 17)
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Image:
1999 Dec. 10
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Because it is far away, it keeps 14 mag until late 2000, while Northern people can observe it under good condition. It is diffused.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 22 11.95 14 41.1 4.655 4.308 63 14.2 16.1 107.4 21:03 (106, -3)
Jan. 8 22 19.49 14 10.2 4.729 4.296 58 14.2 16.4 104.1 21:02 (103, -6)
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Image:
1999 Dec. 23
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Now at the peak. It is around 13 mag visually, much brighter than this ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 2 53.57 25 55.6 0.763 1.573 128 14.3 30.6 135.7 21:03 (167, 28)
Jan. 8 3 5.37 23 30.7 0.798 1.570 123 14.4 31.3 128.3 21:02 (163, 30)
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Image:
1999 Dec. 23
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Although it was bright as 12 mag visually in October and November, it faded out in December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 0 59.82 9 34.4 1.087 1.559 97 14.5 38.9 40.5 21:03 (131, 31)
Jan. 8 1 12.35 12 56.3 1.146 1.568 94 14.7 39.2 44.2 21:02 (130, 26)
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Image:
1999 Dec. 9
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It will keep 14 mag until 2000 March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 14 30.26 31 50.6 3.729 3.715 81 14.9 7.3 329.0 3:03 (234, -5)
Jan. 8 14 27.67 32 38.8 3.646 3.737 87 14.8 9.4 323.0 3:10 (229, 0)
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Image:
1999 Dec. 21
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It brightened rapidly. It keeps 15 mag until April, but it maybe brighter than the ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 13 15.68 -4 14.2 1.861 1.961 80 15.0 29.8 129.1 3:03 (251, 32)
Jan. 8 13 26.16 -6 25.5 1.794 1.964 84 14.9 28.6 131.0 3:10 (248, 38)
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Image:
1999 July 31
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It will reach to 13.5 mag in June, but will not be observable 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)
Jan. 1 19 15.10 -39 12.5 4.621 3.696 17 15.0 15.3 115.0 21:03 ( 38, -1)
Jan. 8 19 23.65 -39 58.2 4.590 3.665 17 15.0 15.8 114.9 21:02 ( 35, -3)
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Image:
1999 Dec. 9
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Gradually fading. The altitude in the Northerm Hemisphere will not high after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 10 43.60 -18 32.5 3.887 4.294 108 15.3 13.4 228.6 3:03 (224, 69)
Jan. 8 10 38.22 -19 31.2 3.852 4.357 114 15.3 14.1 236.0 3:10 (199, 74)
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It is expected to be bright as 7 mag in late 2000. It keeps extremely low until 2000 January for nothern people, then they cannot observe it until 2000 December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 1 9.24 -41 15.5 4.625 4.553 79 15.4 5.1 349.7 21:03 ( 67, 59)
Jan. 8 1 9.12 -40 38.9 4.640 4.484 74 15.3 5.5 5.7 21:02 ( 67, 54)
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Image:
1999 Oct. 10
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It will be observable as 15 mag with a good condition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 16 26.75 34 54.1 7.474 7.137 66 15.4 5.6 101.0 3:03 (245,-27)
Jan. 8 16 29.72 34 49.0 7.424 7.133 69 15.4 5.0 94.4 3:10 (242,-21)
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Image:
1999 Dec. 7
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After the perihelion passage, it is still getting brighter. It maybe brighter than this ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 4 47.58 16 23.7 1.237 2.155 152 15.5 7.9 314.2 22:05 (180, 39)
Jan. 8 4 45.58 17 2.7 1.307 2.185 144 15.7 6.2 335.6 21:35 (180, 38)
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Image:
1999 Dec. 21
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Appearing at dawn. It was 15.3 mag on Dec. 21 by KenIchi Kadota, Ageo, as bright as the ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 14 4.51 -19 18.6 3.168 2.882 64 15.5 5.7 279.3 3:03 (273, 31)
Jan. 8 14 1.16 -19 9.7 3.099 2.953 72 15.6 8.1 281.7 3:10 (268, 38)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 23 36.02 -14 46.1 1.965 1.858 69 15.6 36.8 63.2 21:03 ( 94, 31)
Jan. 8 23 51.63 -12 50.1 2.063 1.897 66 16.1 36.1 62.9 21:02 ( 94, 28)
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Image:
1999 Nov. 28
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It will be 13 mag at good position in 2000 September.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 22 11.22 24 11.5 4.611 4.360 69 15.7 0.8 114.4 21:03 (114, -9)
Jan. 8 22 11.88 24 12.4 4.662 4.315 63 15.7 1.9 71.4 21:02 (110,-14)
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Image:
1999 Dec. 7
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It keeps 16 mag and the good position until February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 8 32.68 23 37.2 1.553 2.479 154 15.8 9.1 260.7 1:54 (180, 31)
Jan. 8 8 27.64 23 26.8 1.540 2.496 162 15.9 10.8 262.0 1:21 (180, 32)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 22 37.97 0 26.7 3.217 2.883 61 16.0 9.2 109.6 21:03 ( 98, 11)
Jan. 8 22 42.13 0 9.4 3.415 2.970 55 16.3 9.4 101.9 21:02 ( 95, 6)
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Image:
1999 Dec. 9
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Extremely diffused and hard to observe. It is 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)
Jan. 1 15 41.61 71 37.8 2.361 2.706 99 16.2 34.7 19.4 3:03 (202,-33)
Jan. 8 16 1.01 75 25.9 2.413 2.793 102 16.4 34.5 19.7 3:10 (197,-33)
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Image:
1999 Dec. 7
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Although it locates at good position for a while, it will fade out gradually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 3 31.78 47 1.8 1.070 1.898 135 16.4 22.1 151.7 21:03 (178, 8)
Jan. 8 3 39.69 44 46.9 1.119 1.915 131 16.6 23.0 145.3 21:02 (174, 10)
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Image:
1999 Dec. 6
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It is brighter than the ephemeris recently, brighter than 16.0 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 7 21.05 26 30.7 2.798 3.772 170 16.5 10.1 285.8 0:42 (180, 29)
Jan. 8 7 15.88 26 49.1 2.784 3.765 175 16.5 10.3 284.0 0:10 (180, 28)
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Image:
1999 May 12
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Appearing at dawn. No observations reported since June 13. It may be much 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)
Jan. 1 14 26.46 -32 17.8 3.800 3.362 56 16.7 16.6 121.9 3:03 (289, 32)
Jan. 8 14 33.96 -33 18.0 3.757 3.404 61 16.7 15.4 123.3 3:10 (288, 38)
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Image:
1999 Dec. 9
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It keeps 16 mag at good position until 2000 May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 10 40.92 26 29.2 3.988 4.639 126 16.7 9.7 360.0 3:03 (195, 27)
Jan. 8 10 40.54 27 38.9 3.937 4.666 133 16.7 10.3 352.0 3:10 (186, 27)
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Although it has passed the perihelion in 1998 September, it is unexpectedly bright still now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 3 11.71 -23 14.7 5.000 5.429 110 16.7 10.8 330.5 21:03 (146, 76)
Jan. 8 3 9.37 -22 7.6 5.135 5.484 105 16.7 10.5 338.0 21:02 (129, 71)
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New comet. It will reach to 14 mag in 2000 November. It will be brightening gradually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 3 8.99 71 8.9 4.584 5.188 123 17.0 18.9 224.4 21:03 (177,-16)
Jan. 8 2 52.28 69 28.7 4.587 5.142 119 16.9 18.5 216.4 21:02 (173,-15)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 10 21.01 -0 47.0 2.080 2.731 121 16.9 3.2 258.3 3:03 (197, 55)
Jan. 8 10 18.92 -0 46.9 2.044 2.773 129 17.0 5.8 276.9 3:10 (181, 56)
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Although the condition is good until April, it will be only 17 mag at best.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 10 3.54 3 29.6 2.310 3.014 127 17.1 6.7 194.1 3:03 (189, 51)
Jan. 8 10 2.24 2 46.5 2.250 3.024 134 17.1 6.9 213.9 2:55 (180, 52)
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Image:
1999 Nov. 13
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Although the condition is good, it will fade out gradually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 3 25.97 12 48.7 5.026 5.733 132 17.1 11.3 291.5 21:03 (174, 42)
Jan. 8 3 21.31 13 18.0 5.160 5.771 124 17.2 9.9 295.4 21:02 (164, 40)
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Image:
1999 Sept. 20
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Fading out gradually. It was a bit brighter than the ephemeris recently.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 7 56.15 51 39.8 1.429 2.323 148 17.3 12.5 268.6 1:17 (180, 3)
Jan. 8 7 46.47 51 28.5 1.451 2.356 150 17.4 13.4 257.6 0:40 (180, 4)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 1 44.87 20 52.6 6.299 6.724 111 17.3 2.1 307.8 21:03 (148, 27)
Jan. 8 1 44.31 21 2.6 6.373 6.689 104 17.3 1.7 340.2 21:02 (142, 24)
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Retrograde asteroid. It will be overhead as 17 mag until March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 13 44.98 7 48.3 2.412 2.425 79 17.5 17.2 313.8 3:03 (246, 19)
Jan. 8 13 38.10 9 20.8 2.268 2.440 87 17.4 22.4 310.9 3:10 (237, 25)
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Image:
1999 Jan. 22
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A Centaur asteroid. The perihelion passage is in 2004. It will keep the current brightness over 10 years after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 9 56.45 -0 3.6 12.748 13.371 127 17.6 2.1 254.2 3:03 (186, 55)
Jan. 8 9 55.42 -0 6.8 12.658 13.368 134 17.5 2.4 261.9 2:49 (180, 55)
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Image:
1999 Nov. 13
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Because it is extremely far away, it keeps brighter than 17 mag until late 2000.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 2 10.39 7 42.7 5.205 5.663 113 17.6 8.5 210.8 21:03 (148, 42)
Jan. 8 2 8.67 6 54.3 5.308 5.647 105 17.6 7.2 204.4 21:02 (139, 39)
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Fading very slowly. Akimasa Nakamura, Kuma, observed it on Nov. 4 and it was 17.7 mag, a bit brighter than this ephemeris.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Jan. 1 2 36.18 11 3.7 4.279 4.849 120 18.3 2.1 308.3 21:03 (157, 41)
Jan. 8 2 35.75 11 14.3 4.387 4.858 113 18.4 1.7 354.5 21:02 (149, 38)
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