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Image:
1998 Dec. 13
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It was 9.5-10.0 mag, a bit fainter than the ephemeris in December. Now it is around 10.0 mag. The apprent location keeps stable for a while.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 23 39.08 -23 55.4 0.949 1.143 72 9.5 71.2 92.3 18:25 ( 17, 29)
Jan. 2 0 14.31 -23 54.4 0.998 1.186 73 9.8 66.8 88.0 18:29 ( 16, 29)
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Image:
1998 Dec. 24
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Although it is rather fainter by CCD, but about 9 mag and easy to see visually. It has two tails, a long anti-tail towards southeast and an ordinary tail towards west.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 12 57.67 -8 0.1 1.455 1.572 77 9.8 37.7 325.0 5:35 (337, 44)
Jan. 2 12 45.74 -3 58.2 1.334 1.644 89 9.8 48.6 322.5 5:37 (351, 51)
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Image:
1998 Dec. 13
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Brightening well. Now it is very low. 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)
Dec. 26 18 53.50 39 49.9 1.985 1.784 63 10.0 14.4 22.4 18:25 (123, 23)
Jan. 2 18 57.07 41 34.0 1.950 1.767 64 9.9 17.6 20.2 18:29 (128, 19)
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Image:
1998 Dec. 24
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Rapidly brightening while approaching to the earth and the tail is getting greater. Now it is 10 mag visually. We can see it as around 10.0 mag under good condition until next spring. Very low for Southern people.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 6 43.87 38 47.9 1.285 2.246 163 10.5 13.6 229.8 0:28 (180, 86)
Jan. 2 6 37.53 37 39.5 1.262 2.226 165 10.3 15.2 225.2 23:49 (180, 87)
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Image:
1998 Dec. 13
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It has become small and faint. Fading gradually now. t is going lower rapidly. The chance is until the end of December. 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)
Dec. 26 21 14.22 19 26.0 1.373 1.238 60 10.6 20.5 202.8 18:25 ( 86, 41)
Jan. 2 21 11.13 17 33.8 1.551 1.248 53 10.9 14.4 199.9 18:29 ( 89, 33)
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Image:
1998 Dec. 24
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It keeps the good condition until next spring. It is brightening since October and now 10 mag visually. The tail is getting greater. Very low for Southern people.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 7 22.47 41 5.2 0.834 1.784 157 11.0 5.7 252.4 1:06 (180, 84)
Jan. 2 7 18.56 40 45.0 0.814 1.773 161 10.9 8.2 240.0 0:35 (180, 84)
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Only observable in the Southern Hemisphere. It was bright as 11.0 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. 26 6 2.01 -73 49.3 7.335 7.277 82 11.6 8.5 267.0 23:41 ( 0,-19)
Jan. 2 5 48.08 -73 47.0 7.395 7.335 82 11.7 8.2 277.1 22:59 ( 0,-19)
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Image:
1998 Dec. 13
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It was 10 mag and diffused in November. It is fading out now and 12 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. 26 21 50.38 -16 28.3 2.141 1.690 50 12.4 43.6 68.9 18:25 ( 46, 24)
Jan. 2 22 9.73 -14 36.9 2.223 1.729 48 12.7 42.4 67.8 18:29 ( 50, 24)
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Image:
1998 Dec. 13
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A bit fainter than the ephemeris. It is already fainter than 13 mag, one reported that 15.5 mag by CCD. It locates very low in the southwest at dusk and the observation should be very hard. 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)
Dec. 26 21 30.44 -18 27.3 4.761 4.126 45 13.2 11.7 107.8 18:25 ( 49, 20)
Jan. 2 21 36.05 -18 50.5 4.885 4.169 39 13.3 12.0 104.9 18:29 ( 53, 15)
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Image:
1998 Dec. 24
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It has been as bright as 13 mag both visually and by CCD since perihelion passage. It will keep the brightness for a while 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)
Dec. 26 6 21.45 46 46.6 0.904 1.848 156 13.4 11.7 227.5 0:05 (180, 78)
Jan. 2 6 15.97 45 43.4 0.935 1.878 156 13.6 12.5 216.6 23:28 (180, 79)
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Image:
1998 Dec. 13
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Brightening as 13.5-14.0 mag visually. But fainter than 15 mag by CCD. It will reach to 7 mag next year but the condition is bad for Northern people. 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)
Dec. 26 23 25.76 3 16.4 2.805 2.798 79 13.7 13.0 226.0 18:25 ( 34, 53)
Jan. 2 23 22.01 2 18.2 2.882 2.728 71 13.7 10.2 221.6 18:29 ( 45, 48)
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Image:
1998 Dec. 13
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Brightening well. 14 mag visually and 15 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. 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)
Dec. 26 21 24.71 -10 26.3 2.641 2.087 46 13.9 29.8 78.0 18:25 ( 56, 25)
Jan. 2 21 38.76 -9 39.5 2.659 2.049 42 13.7 31.0 76.8 18:29 ( 60, 22)
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It was not in ourburst in December, so we failed to catch it. It should have been fainter than 15.5 mag. Although it is getting highter gradually, it keeps lower than 27 deg for Northern people in 1999.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 14 55.46 -25 35.4 6.846 6.200 45 14.1 9.6 112.1 5:35 (318, 16)
Jan. 2 14 59.95 -26 0.2 6.760 6.198 51 14.1 9.1 112.7 5:37 (323, 18)
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Image:
1998 Dec. 19
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Bright as around 14.0 mag visually, around 15.0 mag by CCD. It will keep the good position for a while. But the brightness is at peak now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 4 2.48 1 22.5 0.865 1.741 140 14.3 27.4 346.5 21:42 ( 0, 57)
Jan. 2 4 0.44 4 33.1 0.890 1.734 135 14.3 27.7 355.3 21:13 ( 0, 60)
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Image:
1998 Dec. 5
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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. It is rather bright as 13-14 mag visually now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 10 2.58 -38 37.8 4.332 4.585 98 14.5 16.4 202.1 3:46 ( 0, 16)
Jan. 2 9 58.31 -40 22.9 4.225 4.545 102 14.3 16.8 208.2 3:14 ( 0, 15)
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Only observable in the Southern Hemisphere. No observations reported recently. It was faint as 14-16 mag between August and October.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 21 55.66 -67 33.1 3.093 2.658 55 14.7 31.1 63.3 18:25 ( 15,-17)
Jan. 2 22 27.64 -65 44.9 3.137 2.695 54 14.8 31.3 58.6 18:29 ( 17,-16)
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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)
Dec. 26 20 56.79 -22 19.5 2.797 2.091 36 15.0 32.7 59.4 18:25 ( 52, 12)
Jan. 2 21 10.96 -20 20.7 2.826 2.073 33 15.0 33.3 58.9 18:29 ( 57, 10)
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Image:
1998 Dec. 12
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14 mag visually, but 16 mag by CCD. Slowly fading although the location will be good for a while.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 0 54.84 14 57.5 2.149 2.574 104 15.3 12.2 67.4 18:36 ( 0, 70)
Jan. 2 1 0.77 15 32.6 2.242 2.582 98 15.4 14.2 68.0 18:29 ( 11, 70)
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Image:
1998 Dec. 12
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14.5 mag visually and 15 mag by CCD, but low in the evening sky. 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)
Dec. 26 19 46.12 26 41.9 3.524 3.059 54 15.6 25.2 70.6 18:25 (105, 27)
Jan. 2 19 58.66 27 42.5 3.575 3.091 53 15.7 25.6 69.3 18:29 (108, 24)
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Not yet observed in this return. The ephemeris says it will be brighter than 16 mag, so CCD observers may catch it soon. Now is the chance to observe it for the first time. It will be at the peak in June and reach to 13 mag, but the altitude keeps only about 15 deg for the Northern people until June.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 15 9.91 -22 29.0 2.557 1.956 43 16.0 36.8 108.5 5:35 (313, 16)
Jan. 2 15 27.96 -23 48.4 2.464 1.913 45 15.8 37.8 107.1 5:37 (316, 17)
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Image:
1998 Dec. 24
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Beginning to be observable at dawn. No observations have been reported since June. It will keep the brightness for a long time after this, but it keeps very low for the Northern people.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 14 20.67 -19 18.4 4.048 3.575 54 16.1 18.0 132.0 5:35 (321, 25)
Jan. 2 14 27.09 -20 42.1 3.980 3.593 60 16.1 17.2 133.7 5:37 (327, 27)
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Image:
1998 Dec. 13
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Rapidly fading since October. It is already as faint as 16 mag. It has a strange tail towards west (about 1 arcmin). Very close by a new comet P/1998 VS24, 1.6 deg this week and 1.0 deg next week.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 2 29.04 8 42.7 1.941 2.616 123 16.2 4.5 71.7 20:10 ( 0, 64)
Jan. 2 2 31.50 8 55.4 2.105 2.699 117 16.5 6.5 70.3 19:45 ( 0, 64)
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Image:
1998 Dec. 24
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Faint as 16-17 mag by CCD, but one reported it as 14.9 mag visually. It will keep the current brightness for a while.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 8 14.43 36 22.3 4.087 4.975 151 17.0 21.1 307.5 1:58 (180, 89)
Jan. 2 8 4.23 37 49.9 4.062 4.987 158 17.0 21.7 304.2 1:21 (180, 87)
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Image:
1998 Dec. 19
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It is around the aphelion now. But the position is good. The recent magnitude is 17-19 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 2 58.16 14 1.1 3.744 4.463 132 17.1 4.6 274.4 20:38 ( 0, 69)
Jan. 2 2 56.33 14 5.1 3.841 4.473 124 17.1 3.1 285.0 20:09 ( 0, 69)
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Image:
1998 Dec. 12
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Rapidly fading, much faster than the ephemeris. Although the position is good, it should be very faint now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 0 31.05 26 36.2 1.560 2.023 103 17.1 21.7 76.2 18:25 ( 18, 81)
Jan. 2 0 42.49 27 13.5 1.648 2.047 99 17.4 23.2 76.2 18:29 ( 45, 80)
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Mother asteroid of Geminids. CCD observers will be able to catch it because it is stellar in a good position.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 1 49.11 27 33.3 1.513 2.179 120 17.2 19.5 216.1 19:29 ( 0, 82)
Jan. 2 1 44.34 25 50.2 1.576 2.144 111 17.2 15.3 206.6 18:57 ( 0, 81)
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Rather fainter now, about 17.5-18.5 mag. Observations will be hard because it is in the eveining and not so high. Although we have another chance to observe it in late 1999 and the comet will be 17 mag then, the altitudde is low as 40 deg anyway.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 3 40.33 -15 23.4 3.196 3.850 125 17.4 4.7 299.9 21:20 ( 0, 40)
Jan. 2 3 38.71 -15 2.8 3.261 3.848 119 17.4 4.3 323.8 20:51 ( 0, 40)
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Image:
1998 Dec. 19
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It is around the aphelion now. But the position is good. The recent magnitude is 18-19 mag.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 3 15.24 15 32.7 3.454 4.222 136 17.4 5.0 270.6 20:55 ( 0, 71)
Jan. 2 3 13.23 15 34.6 3.525 4.213 128 17.5 3.4 278.4 20:26 ( 0, 71)
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Not yet recovered. Because the position is good, it may be fainter than the ephemeris. Delta-T is large as 3.6 days. It should reach to about 17.5 mag soon.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 7 46.78 26 45.4 1.378 2.325 159 17.7 6.0 282.5 1:30 ( 0, 82)
Jan. 2 7 43.19 26 54.0 1.322 2.290 167 17.5 7.9 278.2 0:59 ( 0, 82)
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A Centaur asteroid. CCD observers will be able to catch it because it is stellar in a good position.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 9 32.17 5 17.2 12.886 13.536 129 17.7 2.1 258.9 3:15 ( 0, 60)
Jan. 2 9 31.12 5 15.1 12.797 13.533 136 17.7 2.4 265.0 2:47 ( 0, 60)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 1 38.11 13 23.9 1.509 2.105 113 17.7 16.0 72.1 19:19 ( 0, 68)
Jan. 2 1 45.91 14 0.6 1.595 2.122 108 17.9 18.1 72.1 18:59 ( 0, 69)
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It is rather lower. But it is brighter than the ephemeris, about 16.5 mag recently. So CCD observers can catch it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 0 17.19 -7 14.6 4.268 4.331 87 17.9 7.9 48.5 18:25 ( 10, 47)
Jan. 2 0 20.25 -6 36.6 4.386 4.341 80 18.0 9.0 51.7 18:29 ( 20, 46)
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Image:
1998 Dec. 24
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Rapidly brightening. It should be 17.5-18.0 mag now. Although the peak is in February, the brightness will be stable. The position is good.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 6 36.17 26 9.5 0.907 1.888 174 18.3 11.4 241.9 0:20 ( 0, 81)
Jan. 2 6 30.78 25 29.3 0.886 1.867 175 18.1 12.1 240.0 23:43 ( 0, 80)
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A Centaur asteroid. Although it is rather lower, CCD observers will be able to catch it because it is stellar.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 14 19.72 11 31.3 14.082 13.740 67 18.4 3.3 81.5 5:35 (296, 49)
Jan. 2 14 21.16 11 35.5 13.998 13.759 73 18.4 2.9 75.6 5:37 (304, 54)
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Image:
1998 Dec. 11
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Recovered after 59 years since 1939. Around 18 mag, a bit fainter. Fading gradually after this.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 3 20.54 18 20.8 2.618 3.417 138 18.4 3.7 246.9 21:01 ( 0, 73)
Jan. 2 3 19.34 18 12.5 2.694 3.421 131 18.5 1.7 237.7 20:32 ( 0, 73)
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Observations will be hard because it is faint and not so high in the evening.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 22 41.38 2 40.8 1.468 1.448 69 18.4 48.2 53.1 18:25 ( 48, 47)
Jan. 2 22 59.51 6 1.2 1.518 1.463 67 18.6 48.1 54.0 18:29 ( 55, 48)
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A new comet but very faint. It is high in the evening. Gradually fading after this. Very close by a new comet C/1998 K5, 1.6 deg this week and 1.0 deg next week.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 2 35.29 8 53.9 2.749 3.410 125 18.5 1.2 347.2 20:16 ( 0, 64)
Jan. 2 2 35.63 9 5.0 2.837 3.412 118 18.6 2.6 41.7 19:49 ( 0, 64)
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Although it is high enough, so faint.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 1 59.67 20 19.3 3.881 4.463 120 18.9 16.9 229.8 19:40 ( 0, 75)
Jan. 2 1 53.90 19 6.8 4.030 4.490 111 19.0 14.3 226.8 19:07 ( 0, 74)
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A new asteroid whose orbit is like a comet. So faint. But it is high enough and stellar, so CCD observers may catch it.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 9 45.39 36 21.4 1.423 2.219 133 19.0 28.8 350.7 3:29 (180, 89)
Jan. 2 9 41.64 39 36.9 1.443 2.285 139 19.1 28.4 343.8 2:57 (180, 85)
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Image:
1998 Dec. 20
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A new comet. But so faint and fading after this. The position is good.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 26 10 0.84 13 46.8 1.738 2.454 126 19.1 0.1 13.6 3:44 ( 0, 69)
Jan. 2 10 0.15 13 51.0 1.724 2.507 133 19.2 3.1 290.9 3:16 ( 0, 69)
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