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It keeps bright at 4 mag locating high in the evening sky until late 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. 25 4 8.00 -4 13.0 0.386 1.298 138 4.1 105.7 340.7 21:49 ( 0, 52)
Jan. 1 3 51.42 8 52.8 0.354 1.262 135 3.8 127.8 344.0 21:05 ( 0, 65)
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New comet. It must have located in the very low sky at dawn in October and November. It had been around 6-6.5 mag from Dec. 16 to 20. If it survives the perihelion passage, it will appear in the evening sky in late December, then it will be observable while fading.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 19 9.18 -18 42.3 1.014 0.236 13 6.8 190.8 97.1 18:25 ( 70, -4)
Jan. 1 20 38.49 -21 52.6 0.879 0.430 25 9.1 177.3 98.2 18:29 ( 59, 4)
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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. 25 8 0.45 -60 33.8 1.153 1.559 93 7.5 100.9 264.9 1:50 ( 0, -6)
Jan. 1 6 28.36 -58 59.5 1.184 1.640 97 7.8 97.2 287.7 23:35 ( 0, -4)
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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. 25 3 7.22 11 6.1 1.260 2.066 133 10.9 5.2 84.4 20:50 ( 0, 66)
Jan. 1 3 10.36 11 14.1 1.330 2.080 127 11.0 8.2 77.7 20:26 ( 0, 66)
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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. 25 23 27.44 43 45.1 1.678 2.058 97 11.0 10.3 1.7 18:25 (127, 73)
Jan. 1 23 28.71 44 59.6 1.761 2.069 93 11.2 11.6 17.7 18:29 (125, 68)
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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. 25 11 41.18 12 21.9 0.939 1.500 102 11.2 34.6 91.4 5:26 ( 0, 67)
Jan. 1 11 57.01 12 20.8 0.909 1.511 105 11.2 31.6 88.8 5:14 ( 0, 67)
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In the Northern Hemisphere, it keeps observable until 2005 spring when it reaches to 8 mag. It will be unobservable in the evening sky soon. The altitude in the morning will be constant until late February, and it will not be higher.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 17 51.82 41 49.8 2.064 1.881 65 11.5 40.8 128.2 5:35 (234, 22)
Jan. 1 18 11.32 38 51.6 2.018 1.789 62 11.3 40.7 128.7 5:37 (237, 23)
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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. 25 18 27.09 -20 47.8 2.506 1.526 3 12.7 46.5 93.2 18:25 ( 74,-14)
Jan. 1 18 50.51 -20 58.9 2.485 1.503 2 12.4 47.3 91.0 18:29 ( 75,-16)
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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. 25 2 24.59 14 42.0 1.319 2.049 125 12.9 8.7 1.1 20:07 ( 0, 70)
Jan. 1 2 25.59 15 45.6 1.357 2.022 118 12.8 10.3 22.8 19:41 ( 0, 71)
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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. 25 21 10.70 62 11.9 3.158 3.348 92 13.3 25.8 115.7 18:25 (147, 48)
Jan. 1 21 32.82 60 54.6 3.275 3.426 90 13.6 24.5 115.7 18:29 (144, 47)
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Although it was faint at 13 mag in early December, it brightened to 11 mag again in mid December.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 23 59.97 9 6.5 5.641 5.729 90 13.4 4.5 80.1 18:25 ( 23, 62)
Jan. 1 0 2.30 9 13.6 5.754 5.730 83 13.5 5.6 77.0 18:29 ( 37, 60)
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It bursted out in late November and reached to 13.5 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. 25 6 38.28 52 35.5 1.765 2.665 150 13.7 58.0 296.7 0:26 (180, 73)
Jan. 1 5 56.32 54 58.8 1.794 2.671 146 13.8 55.3 286.5 23:07 (180, 70)
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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. 25 11 25.65 -17 15.5 3.604 3.801 94 14.1 10.2 263.6 5:11 ( 0, 38)
Jan. 1 11 20.20 -17 20.1 3.558 3.881 101 14.1 12.2 269.2 4:38 ( 0, 38)
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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. 25 0 15.50 45 31.5 1.450 1.970 106 14.3 7.2 9.4 18:25 (157, 78)
Jan. 1 0 17.58 46 23.7 1.508 1.962 101 14.4 9.3 32.2 18:29 (142, 74)
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It tends to become brightest after the perihelion passage. It was 16 mag in mid December, 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. 25 10 38.03 23 3.2 2.109 2.738 120 14.5 9.3 37.7 4:23 ( 0, 78)
Jan. 1 10 40.32 23 58.8 2.046 2.749 126 14.4 9.1 21.1 3:58 ( 0, 79)
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Diffused, and fading rapidly. It was around 16 mag in mid December, fainter than this ephemeris by 1 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 11 39.22 40 24.7 2.898 3.385 111 15.0 6.3 311.6 5:24 (180, 85)
Jan. 1 11 35.60 40 55.5 2.884 3.454 117 15.1 8.4 303.0 4:53 (180, 84)
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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. 25 5 40.24 48 12.0 5.363 6.264 154 15.1 6.3 285.6 23:22 (180, 77)
Jan. 1 5 36.07 48 21.6 5.357 6.236 151 15.0 5.9 280.3 22:50 (180, 77)
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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. 25 1 3.67 -19 30.0 1.131 1.535 92 15.3 28.6 40.1 18:47 ( 0, 36)
Jan. 1 1 13.59 -16 50.5 1.143 1.502 89 15.2 32.3 42.9 18:29 ( 0, 38)
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It will be observable in good conditon at 15.5 mag until late January. In its last return in 1997, it burst out after the perihelion passage and became extremely bright, reached to 11 mag. However, it is faint in this return.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 9 9.08 20 28.5 1.096 1.953 139 15.4 17.7 12.5 2:54 ( 0, 75)
Jan. 1 9 10.16 22 36.1 1.061 1.960 146 15.4 19.1 1.6 2:28 ( 0, 77)
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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. 25 1 59.44 25 2.4 0.614 1.410 122 15.5 68.9 232.2 19:40 ( 0, 80)
Jan. 1 1 34.50 20 8.4 0.626 1.322 108 15.6 60.3 227.3 18:48 ( 0, 75)
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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. 25 0 3.57 31 30.0 0.756 1.337 99 15.5 47.2 39.7 18:25 ( 70, 82)
Jan. 1 0 20.88 35 25.6 0.824 1.371 98 15.7 44.4 45.1 18:29 ( 97, 79)
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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. 25 4 57.05 -18 2.5 4.226 4.964 134 15.6 16.4 256.9 22:39 ( 0, 37)
Jan. 1 4 49.33 -18 24.1 4.214 4.901 129 15.5 15.6 260.9 22:03 ( 0, 37)
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Brighening well as expected. We can observe it in good condition while it is brightening, then the comet will reach to 9 mag in 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. 25 12 25.85 10 3.2 2.070 2.315 91 16.2 20.6 101.3 5:35 (340, 64)
Jan. 1 12 35.26 9 37.4 1.947 2.274 96 15.9 19.8 99.6 5:37 (351, 64)
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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. 25 1 16.42 8 32.8 1.201 1.765 107 16.1 27.2 50.0 19:00 ( 0, 64)
Jan. 1 1 26.73 10 33.4 1.277 1.782 103 16.5 28.3 53.2 18:43 ( 0, 66)
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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. 25 7 55.88 59 32.7 1.268 2.116 139 16.3 7.1 3.2 1:42 (180, 66)
Jan. 1 7 55.38 60 13.8 1.227 2.084 140 16.1 4.8 343.0 1:14 (180, 65)
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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. 25 5 42.25 27 42.8 1.947 2.924 171 16.5 11.4 260.4 23:24 ( 0, 83)
Jan. 1 5 36.52 27 28.1 1.957 2.914 163 16.4 10.6 257.8 22:51 ( 0, 82)
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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. 25 23 55.01 5 15.1 2.386 2.540 87 16.5 18.3 64.9 18:25 ( 22, 58)
Jan. 1 0 3.12 6 11.3 2.469 2.538 82 16.5 19.8 65.2 18:29 ( 33, 57)
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New comet. It keeps 16.5 mag in good condition until late January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 11 3.99 23 20.7 1.792 2.375 114 16.5 9.8 33.6 4:49 ( 0, 78)
Jan. 1 11 5.99 24 22.4 1.757 2.416 121 16.6 9.7 14.0 4:23 ( 0, 79)
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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. 25 0 54.50 -2 19.2 3.597 3.861 98 16.6 6.4 39.6 18:37 ( 0, 53)
Jan. 1 0 56.75 -1 43.2 3.722 3.879 91 16.7 7.7 46.0 18:29 ( 7, 53)
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It will brighten gradually, then it will be 15 mag in spring and summer.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 14 57.01 -13 29.6 4.066 3.482 47 16.8 18.2 108.6 5:35 (309, 24)
Jan. 1 15 5.19 -14 8.9 3.973 3.468 52 16.8 17.6 108.0 5:37 (314, 27)
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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. 25 22 23.11 3 57.3 6.075 5.750 66 16.9 1.7 128.0 18:25 ( 54, 45)
Jan. 1 22 23.93 3 52.0 6.238 5.801 59 17.0 2.2 102.7 18:29 ( 61, 40)
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Although the condition is good, it will be fainter than 18 mag in late February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 3 51.03 8 45.3 1.071 1.946 142 17.0 12.4 340.1 21:33 ( 0, 64)
Jan. 1 3 49.87 10 10.1 1.105 1.937 136 17.1 12.5 357.1 21:05 ( 0, 65)
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New comet. Very diffused. It will fade out rapidly after this, and will be fainter than 18 mag in early January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 0 14.96 12 50.0 0.514 1.149 95 17.2 111.6 65.3 18:25 ( 15, 67)
Jan. 1 1 0.38 17 29.3 0.581 1.225 99 17.7 92.6 68.3 18:29 ( 9, 73)
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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. 25 0 57.72 9 19.0 2.769 3.146 103 17.2 7.6 82.0 18:41 ( 0, 64)
Jan. 1 1 1.69 9 29.3 2.857 3.137 97 17.2 9.5 78.6 18:29 ( 7, 64)
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Although the condition is good, it will be fainter than 18 mag in February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 5 20.16 32 8.6 0.959 1.925 165 17.3 4.7 284.7 23:02 ( 0, 87)
Jan. 1 5 18.13 32 13.7 0.971 1.920 158 17.3 2.7 276.4 22:33 ( 0, 87)
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Diffused, and fading rapidly. It will be fainter than 18 mag in January.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 1 38.86 9 8.2 2.197 2.732 112 17.3 6.4 55.3 19:22 ( 0, 64)
Jan. 1 1 41.82 9 35.7 2.330 2.774 106 17.6 8.4 59.7 18:57 ( 0, 65)
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It keeps 17.5 mag and locating high until February.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 3 25.38 15 32.0 2.233 3.047 139 17.3 9.2 299.2 21:08 ( 0, 71)
Jan. 1 3 22.06 16 4.8 2.273 3.017 131 17.3 7.5 310.9 20:37 ( 0, 71)
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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. 25 9 45.90 37 53.4 3.695 4.425 133 17.6 5.2 346.2 3:31 (180, 87)
Jan. 1 9 44.72 38 29.3 3.632 4.423 139 17.6 5.8 332.3 3:03 (180, 87)
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Although it has passed the perihelion about 1 year ago, it has been brightening gradually, and reached to 17.5 mag now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 7 34.27 45 37.1 3.093 3.992 152 17.7 9.5 306.2 1:20 (180, 79)
Jan. 1 7 28.85 46 13.2 3.093 4.007 155 17.7 9.6 299.1 0:47 (180, 79)
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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. 25 5 14.72 47 26.8 4.988 5.881 153 17.8 8.0 290.7 22:56 (180, 78)
Jan. 1 5 9.70 47 44.1 4.992 5.854 148 17.8 7.3 287.0 22:24 (180, 77)
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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. 25 6 22.40 8 14.8 3.398 4.354 164 17.8 18.8 243.1 0:09 ( 0, 63)
Jan. 1 6 14.66 7 17.8 3.454 4.402 162 17.8 17.8 244.2 23:28 ( 0, 62)
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New comet. It will be observable at 17.5 mag until May.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 11 45.99 5 18.9 4.378 4.631 98 17.9 7.8 207.2 5:31 ( 0, 60)
Jan. 1 11 43.91 4 31.2 4.245 4.615 106 17.8 8.6 218.6 5:01 ( 0, 60)
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It keeps 18 mag until spring.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 25 14 15.30 43 15.1 6.590 6.602 86 17.8 5.8 358.5 5:35 (243, 61)
Jan. 1 14 14.91 43 58.5 6.532 6.626 91 17.8 6.7 350.6 5:37 (239, 66)
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