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Already visible easily with a naked eye at 4.5 mag. It will reach to 4 mag locating high in the evening sky from mid December to the end of January. In the Northern Hemisphere, it keeps observable in good condition for a long time while the comet is bright enough visible visually until 2005 October when it becomes faint as 14 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 4 38.05 -21 8.0 0.508 1.391 135 5.1 54.5 330.9 23:14 (180, 76)
Dec. 18 4 23.81 -14 13.1 0.439 1.341 137 4.7 78.4 336.3 22:32 (180, 69)
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In the Southern Hemisphere, it keeps observable in good condition until April when it reaches to 13 mag. In the Northern Hemisphere, it will appear at dusk in mid January at 9 mag, then it will keep observable until the end of March 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)
Dec. 11 10 31.20 -51 47.5 1.220 1.404 78 7.4 86.8 229.1 2:53 (314, 60)
Dec. 18 9 28.42 -57 38.3 1.167 1.480 86 7.5 96.8 243.8 2:54 (343, 66)
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It will be fading gradually after this, but it keeps 11 mag until the end of January. It will be visible visually until May when it becomes too 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)
Dec. 11 3 5.17 11 19.0 1.142 2.042 147 10.6 2.6 198.6 21:43 (180, 44)
Dec. 18 3 5.48 11 7.4 1.197 2.053 140 10.7 2.3 112.7 21:16 (180, 44)
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It will be fading gradually after this, but it keeps 11 mag until mid January. In the Northern Hemisphere, it keeps observable until July when it becomes fainter than 18 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 23 31.92 41 26.5 1.511 2.047 108 10.7 12.5 321.2 20:53 (151, 5)
Dec. 18 23 28.41 42 34.6 1.594 2.051 102 10.9 10.4 340.7 20:58 (146, 0)
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Very diffused and widely spreading visually. It keeps bright at 11 mag untill January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 11 5.76 12 52.2 1.010 1.490 96 11.2 39.3 94.7 2:53 (229, 27)
Dec. 18 11 24.03 12 32.8 0.973 1.493 99 11.2 37.2 93.3 2:54 (227, 29)
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In the Northern Hemisphere, it keeps observable until 2005 spring when it reaches to 8 mag. Now it locates at the same altitude both in the evening and morning, but the altitude at dusk will be lower and lower, and becomes lower than 10 deg in January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 17 9.43 47 38.5 2.170 2.064 70 11.9 40.5 126.6 2:53 (235,-54)
Dec. 18 17 31.22 44 46.0 2.114 1.973 68 11.7 40.8 127.5 2:54 (240,-53)
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It is a bit brighter visually than this ephemeris, around 12.5 mag. It keeps observable at 12-13 mag in the evening sky until May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 2 28.05 12 52.3 1.260 2.109 139 13.1 10.0 313.7 21:05 (180, 42)
Dec. 18 2 25.42 13 44.0 1.286 2.079 132 13.0 8.6 335.1 20:58 (173, 41)
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The condition of this return is bad. It is not observable around the perihelion passage. It will appear at dawn in 2005 July at 14.5 mag, then it will be fading after that.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 17 42.00 -19 50.4 2.554 1.582 7 13.4 44.4 97.4 20:53 ( 51,-16)
Dec. 18 18 4.22 -20 24.6 2.530 1.553 5 13.1 45.5 95.3 20:58 ( 48,-17)
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It had been bright at 12-13 mag since September till November. But it is completely diffused at 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)
Dec. 11 23 56.75 9 2.5 5.418 5.728 103 13.4 2.3 95.2 20:53 (137, 35)
Dec. 18 23 58.11 9 2.8 5.529 5.729 96 13.4 3.4 85.2 20:58 (129, 30)
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Completely diffused visually. It keeps observable for a long time after this in the Northern Hemisphere. It is also visible at midnight or dawn, but low.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 20 19.40 64 54.0 2.951 3.189 94 13.4 28.2 113.7 20:53 (150,-31)
Dec. 18 20 46.34 63 32.6 3.050 3.269 93 13.6 27.1 115.1 20:58 (149,-31)
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It bursted out in late November and reached to 13.8 mag. Now it is visible visually.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 7 45.19 44 58.7 1.813 2.660 142 13.7 54.5 313.2 2:27 (180, 10)
Dec. 18 7 15.24 49 7.4 1.771 2.661 148 13.7 57.7 305.7 1:30 (180, 6)
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It will be getting fainter gradually until 2005 June when it becomes 17 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 11 33.53 -16 48.1 3.697 3.640 78 14.0 6.6 246.1 2:53 (261, 42)
Dec. 18 11 30.08 -17 4.5 3.651 3.721 86 14.0 8.3 256.2 2:54 (256, 48)
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It will be fading slowly until 2005 August when it becomes low in the evening sky at 16.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 0 19.53 43 58.6 1.339 1.995 117 14.1 10.0 310.2 20:53 (159, 7)
Dec. 18 0 16.08 44 43.8 1.394 1.981 111 14.2 7.2 335.3 20:58 (154, 3)
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It tends to become brightest after the perihelion passage. It was 16.5 mag in mid November, fainter than expected by about 1-1.5 mag. If it brightens as expected, it will reach to 14 mag in February at the opposition.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 10 29.97 21 36.5 2.252 2.718 107 14.6 11.3 63.9 2:53 (215, 25)
Dec. 18 10 34.56 22 15.7 2.178 2.728 113 14.6 10.1 52.3 2:54 (210, 27)
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Diffused, but still bright as 14 mag. It keeps observable until May when it becomes fainter than 18 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 11 42.17 39 35.7 2.940 3.246 99 14.8 2.7 357.2 2:53 (218, 1)
Dec. 18 11 41.40 39 57.6 2.918 3.315 105 14.9 4.3 325.8 2:54 (213, 4)
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It was visible visually around 13.5 mag in October, but became faint rapidly in November. It keeps observable until it becomes fainter than 18 mag in March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 0 58.99 4 22.5 1.063 1.738 116 15.0 24.2 41.4 20:53 (152, 47)
Dec. 18 1 7.12 6 28.8 1.130 1.750 111 15.2 25.8 46.1 20:58 (145, 42)
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Almost stellar. It keeps observable in good condition until April when it becomes fainter than 18 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 23 33.48 21 38.6 0.631 1.281 102 15.1 55.8 28.7 20:53 (140, 21)
Dec. 18 23 47.76 26 56.4 0.691 1.307 101 15.3 51.0 34.2 20:58 (140, 15)
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It has been brightening more rapidly than expected, and already reached to 15.5 mag. It may be reach to 13 mag in 2006.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 5 48.67 47 39.7 5.419 6.320 154 15.2 6.6 296.5 0:30 (180, 7)
Dec. 18 5 44.50 47 58.0 5.384 6.292 155 15.1 6.5 290.9 23:54 (180, 7)
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It keeps observable at 15.5 mag until mid February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 3 6.35 34 2.8 0.636 1.569 150 15.2 73.6 245.1 21:41 (180, 21)
Dec. 18 2 30.42 29 52.0 0.616 1.492 136 15.3 74.2 238.2 20:58 (175, 25)
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It keeps 15-16 mag in the evening sky until May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 0 48.90 -24 8.3 1.108 1.610 100 15.4 20.8 31.6 20:53 (115, 68)
Dec. 18 0 55.39 -21 56.5 1.120 1.571 96 15.3 24.8 36.5 20:58 (111, 62)
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It will be observable in good conditon at 15.5 mag in winter. In its last return in 1997, it burst out after the perihelion passage and became extremely bright, reached to 11 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 9 2.05 16 57.8 1.192 1.944 126 15.5 16.4 39.2 2:53 (195, 37)
Dec. 18 9 6.35 18 35.1 1.140 1.947 132 15.5 16.7 25.4 2:54 (187, 36)
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It will reach to 9 mag in 2006 spring. It has been brightening well as expected. In this season, it keeps observable until March when it becomes 15.5 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 5 12.75 -16 53.5 4.295 5.089 140 15.7 17.0 248.9 23:49 (180, 72)
Dec. 18 5 4.92 -17 32.2 4.252 5.027 137 15.7 16.8 252.9 23:14 (180, 73)
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It will be getting fainter and lower until March, when it becomes 17.5 mag and too low.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 23 41.05 3 35.3 2.221 2.549 97 16.3 14.6 63.8 20:53 (129, 37)
Dec. 18 23 47.63 4 23.0 2.303 2.544 92 16.4 16.6 64.5 20:58 (124, 32)
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It was observed as 16.5 mag on Oct. 6, fainter than this ephemeris by 1.5 mag. After this, it keeps observable while it will be fading gradually until it becomes fainter than 18 mag in April.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 11 44.84 -11 20.4 2.611 2.599 78 16.3 11.5 127.1 2:53 (257, 36)
Dec. 18 11 48.70 -12 6.0 2.567 2.655 84 16.5 9.3 131.2 2:54 (254, 42)
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It will be as faint as 17.5 mag in March when it becomes low in the evening western sky.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 0 52.20 -3 20.9 3.355 3.824 111 16.4 3.9 11.3 20:53 (144, 53)
Dec. 18 0 52.97 -2 52.0 3.475 3.842 104 16.5 5.1 29.3 20:58 (134, 48)
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It is observable at 16.5 mag in good condition until February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 5 54.22 28 3.7 1.970 2.943 169 16.5 11.0 264.6 0:36 (180, 27)
Dec. 18 5 48.27 27 54.8 1.952 2.933 175 16.5 11.5 262.6 0:02 (180, 27)
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It was 17.8 mag on Oct. 21, brighening well as expected. We can observe it in good condition while it is brightening, then the comet will reach to 9 mag in next spring and summer. It may become a naked-eye object due to the Deep Impact mission on July 4.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 12 6.17 11 8.3 2.320 2.398 82 16.8 21.8 103.8 2:53 (242, 18)
Dec. 18 12 16.14 10 33.7 2.194 2.357 86 16.5 21.3 102.6 2:54 (239, 22)
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It will be fainter than 18 mag in January. But the total magnitude seems to be brighter than this ephemeris because it is very diffused.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 1 36.07 8 27.4 1.943 2.646 126 16.6 2.2 12.8 20:53 (166, 46)
Dec. 18 1 36.91 8 45.2 2.067 2.689 119 16.9 4.2 45.6 20:58 (156, 43)
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It will be too low in the evening sky at 17.5 mag in early February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 22 22.82 4 20.0 5.732 5.648 80 16.7 2.4 199.1 20:53 (113, 23)
Dec. 18 22 22.72 4 6.5 5.906 5.699 73 16.8 1.7 168.0 20:58 (108, 17)
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New comet. It will be observable in good condition at 16 mag from January to March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 7 51.39 57 28.8 1.376 2.189 135 17.1 11.3 24.8 2:32 (180, -2)
Dec. 18 7 54.58 58 36.3 1.318 2.151 137 16.9 9.3 15.6 2:08 (180, -4)
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New comet. Although the condition is good, it is 17 mag at best in December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 3 57.91 6 19.1 1.031 1.969 155 17.0 13.4 312.2 22:35 (180, 49)
Dec. 18 3 53.80 7 27.5 1.046 1.957 149 17.0 12.9 324.7 22:03 (180, 47)
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It is observable at 17 mag in good condition until January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 0 52.45 9 16.6 2.601 3.165 116 17.1 3.6 101.8 20:53 (152, 42)
Dec. 18 0 54.62 9 14.7 2.683 3.155 109 17.1 5.6 88.1 20:58 (143, 38)
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New comet. Although the condition is good, it is 17.3 mag at best in December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 5 26.15 31 37.9 0.965 1.944 170 17.3 6.5 299.4 0:07 (180, 23)
Dec. 18 5 23.01 31 56.7 0.956 1.933 170 17.3 6.0 291.3 23:32 (180, 23)
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New comet. It is observable in good condition at 17.5 mag until March.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 9 45.60 36 45.2 3.850 4.432 120 17.7 4.9 21.5 2:53 (199, 15)
Dec. 18 9 46.20 37 18.3 3.768 4.429 126 17.6 4.9 3.0 2:54 (193, 16)
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It keeps observable at 18 mag in good condition until January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 6 38.33 10 22.8 3.342 4.261 156 17.7 19.2 239.8 1:20 (180, 45)
Dec. 18 6 30.37 9 16.7 3.361 4.307 162 17.7 19.2 241.6 0:44 (180, 46)
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It keeps 18 mag until 2005 spring.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 14 14.46 42 4.8 6.704 6.554 77 17.8 4.4 18.7 2:53 (234,-23)
Dec. 18 14 15.13 42 37.1 6.648 6.578 81 17.8 5.1 7.7 2:54 (231,-19)
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It will reach to 16.7 mag at best in early 2006. Because it moves in the northern sky, it keeps observable for a long time 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)
Dec. 11 5 25.10 46 37.9 5.023 5.937 156 17.8 8.6 299.1 0:07 (180, 8)
Dec. 18 5 19.92 47 4.7 4.998 5.909 155 17.8 8.4 294.7 23:29 (180, 8)
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Asteroid with a cometary orbit. It will become fainter than 18 mag soon. It will be 17.5 mag again in 2006 spring.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 11 3 35.00 14 36.0 2.190 3.113 155 17.8 12.2 286.9 22:12 (180, 40)
Dec. 18 3 29.75 15 2.4 2.207 3.082 147 17.9 10.8 291.7 21:39 (180, 40)
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