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Image:
1998 Nov. 23
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We can observe it for a while under the same condition. It is close by C/1997 J2 this week.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 21 6.12 -17 4.7 0.850 1.038 68 8.7 81.4 108.7 20:38 ( 92, 35)
Dec. 5 21 44.43 -19 49.1 0.858 1.052 69 8.8 80.9 105.2 20:46 ( 90, 36)
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Image:
1998 Nov. 25
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The rapid brightening finished. It turns to fade after this. Southern people cannot see it. Northern people will also miss it after mid December a while.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 22 22.09 42 1.5 0.608 1.288 105 9.0 138.3 220.6 20:38 (150, 5)
Dec. 5 21 45.29 32 9.5 0.788 1.262 90 9.5 78.6 213.3 20:46 (133, 3)
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Image:
1998 Nov. 23
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Northern people can see it for a long time until next May, although it will low in this winter. Southern people cannot see it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 18 45.45 36 13.5 2.036 1.894 67 10.3 2.9 12.9 20:38 (119,-24)
Dec. 5 18 46.30 36 41.0 2.038 1.861 65 10.2 5.6 23.6 20:46 (116,-30)
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Image:
1998 Nov. 29
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Rapidly becomes higher. Southern people also can see it now. It is about 1.5 mag fainter than before perihelion.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 13 20.72 -18 3.2 1.896 1.320 40 10.6 16.5 339.6 2:57 (285, 11)
Dec. 5 13 17.38 -16 7.6 1.802 1.376 49 10.7 19.4 335.5 2:54 (279, 15)
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Image:
1998 Nov. 23
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Now is the best condition. It is 10 mag and diffused. It will fade rapidly after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 20 23.77 -23 6.8 1.845 1.552 57 11.1 48.0 75.7 20:38 ( 81, 28)
Dec. 5 20 46.87 -21 37.7 1.913 1.583 55 11.4 47.0 73.6 20:46 ( 80, 25)
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Image:
1998 Nov. 29
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It keeps the good condition for a while. It is brightening since October and now 10 mag visually. The tail is getting greater. P/1998 U3 is close.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 7 21.20 40 22.9 1.006 1.849 136 11.5 8.0 63.6 2:55 (180, 15)
Dec. 5 7 24.58 40 45.6 0.951 1.829 141 11.4 4.8 53.0 2:31 (180, 14)
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Only observable in the Southern Hemisphere. A bit brighter than the ephemeris, 10.5 mag in October.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 6 54.65 -72 14.5 7.099 7.042 82 11.4 9.4 228.8 2:29 ( 0, 53)
Dec. 5 6 43.01 -72 53.2 7.158 7.101 82 11.5 9.2 237.8 1:50 ( 0, 52)
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Image:
1998 Nov. 29
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Brightening while approaching to the earth and the tail is getting greater. It will be 11 mag until next April. It is too low for Southern people. 52P is close.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 7 0.07 41 14.6 1.511 2.353 139 11.7 2.7 212.5 2:34 (180, 14)
Dec. 5 6 58.30 40 54.6 1.443 2.329 146 11.5 5.5 230.7 2:05 (180, 14)
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Image:
1998 Nov. 23
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A bit fainter than the ephemeris. It will set down in the west soon. 21P is close.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 21 11.03 -16 7.9 4.190 3.959 69 12.8 10.7 128.6 20:38 ( 94, 34)
Dec. 5 21 15.32 -16 51.2 4.342 4.000 63 12.9 10.9 121.8 20:46 ( 89, 28)
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Image:
1998 Nov. 29
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Bright as 13 mag both visually and by CCD. Now is the peak and it will fade after this. Southern people cannot observe it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 6 39.03 47 57.6 0.875 1.754 140 13.5 2.8 336.4 2:13 (180, 7)
Dec. 5 6 37.02 48 7.4 0.870 1.774 145 13.7 4.5 272.6 1:43 (180, 7)
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Image:
1998 Nov. 25
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Although 14 mag visually, 16 mag by CCD. It will reach to 7 mag next year but the condition is bad for Northern people.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 23 55.32 9 0.9 2.507 3.079 116 13.9 27.4 235.7 20:38 (155, 43)
Dec. 5 23 45.48 7 17.6 2.572 3.008 106 13.8 23.6 233.8 20:46 (141, 39)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 14 35.42 -23 49.7 7.102 6.206 23 14.2 11.1 110.6 2:57 (299, 0)
Dec. 5 14 40.67 -24 16.8 7.052 6.204 28 14.2 10.8 110.8 2:54 (297, 4)
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Only observable in the Southern Hemisphere. Recent magnitude is faint as 14-16 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 19 18.06 -71 8.3 2.930 2.523 56 14.4 28.9 90.3 20:38 ( 23, 34)
Dec. 5 20 0.04 -70 53.3 2.970 2.554 56 14.4 29.7 82.8 20:46 ( 23, 34)
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Brightening well. 14.0 mag visually and 15.5 mag by CCD. It will be at conjunction soon and we cannot see it for a year after that. So now is the chance to observe it, but very low at dusk. It will close to M72, M73 next week.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 20 34.11 -12 29.4 2.528 2.246 62 14.6 23.9 83.8 20:38 ( 92, 25)
Dec. 5 20 45.82 -12 8.2 2.561 2.205 58 14.4 25.5 82.2 20:46 ( 89, 20)
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Image:
1998 Nov. 24
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Rather rapidly fading now. It has a strange tail (about 1.5 arcmin).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 2 30.41 9 10.6 1.362 2.281 152 14.7 7.6 238.1 22:01 (180, 46)
Dec. 5 2 28.11 8 48.6 1.493 2.366 144 14.9 4.1 235.5 21:31 (180, 46)
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14 mag visually and 16 mag by CCD. Slowly fading although the location will be good for a while. Now is the chance.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 0 41.83 13 25.0 1.816 2.553 128 14.9 2.6 43.0 20:38 (172, 41)
Dec. 5 0 43.31 13 40.6 1.891 2.557 122 15.0 5.1 59.4 20:46 (161, 39)
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Not yet observed in this return. It may be much fainter than the ephemeris. 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)
Nov. 28 20 0.32 -29 38.1 2.652 2.174 51 15.2 29.9 60.7 20:38 ( 71, 27)
Dec. 5 20 14.34 -27 53.9 2.692 2.152 47 15.1 30.6 60.5 20:46 ( 70, 22)
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14.5 mag visually and 15 mag by CCD. Now is the last chance for observation but getting lower.. Southern people cannnot observe it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 18 58.54 23 27.0 3.309 2.941 59 15.3 22.8 75.7 20:38 (109,-15)
Dec. 5 19 9.97 24 8.5 3.365 2.968 58 15.4 23.5 74.5 20:46 (106,-20)
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It locates high in the Southern Hemisphere. Now is the last chance to observe in the Northern Hemisphere. Northern people cannot observe it in next year.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 10 9.21 -31 27.2 4.814 4.746 80 15.5 15.1 179.2 2:57 (276, 55)
Dec. 5 10 8.93 -33 13.8 4.688 4.706 84 15.4 15.4 184.6 2:54 (277, 61)
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Image:
1998 Nov. 28
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It keeps the current brightness for a while after this. 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)
Nov. 28 4 23.94 -8 34.1 0.866 1.790 150 15.7 19.3 316.6 23:54 (180, 63)
Dec. 5 4 17.61 -6 41.4 0.850 1.774 150 15.6 22.6 323.5 23:20 (180, 62)
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15 mag both visually and by CCD. It will fade soon. Now is the chance. It is low for the Southern people.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 23 55.76 24 33.8 1.244 1.944 120 15.9 12.6 73.2 20:38 (162, 28)
Dec. 5 0 2.71 25 0.4 1.317 1.961 116 16.0 15.4 75.0 20:46 (155, 25)
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A visual observer reported it as 15 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Nov. 28 1 18.45 11 54.6 1.219 2.053 136 17.1 4.9 75.1 20:49 (180, 43)
Dec. 5 1 21.42 12 7.0 1.282 2.064 130 17.3 8.0 73.5 20:46 (173, 43)
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