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Image:
1998 Dec. 13
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We can observe it for a while under the same condition, but slowly fading. It is close by Helix Nebula (NGC 7293) this week.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 22 23.34 -21 54.9 0.877 1.074 70 9.0 78.7 101.2 18:19 ( 21, 30)
Dec. 19 23 1.86 -23 17.0 0.908 1.105 71 9.2 75.3 96.8 18:21 ( 18, 29)
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Image:
1998 Dec. 13
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Although it is rather fainter by CCD, but about 9 mag and easy to see visually. Rapidly becomes higher. It has two tails, a long anti-tail towards southeath 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. 12 13 12.77 -13 54.1 1.695 1.438 57 9.7 23.5 331.5 5:27 (319, 30)
Dec. 19 13 6.42 -11 15.2 1.578 1.504 67 9.8 29.5 328.0 5:32 (327, 37)
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Image:
1998 Dec. 13
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It 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. 12 21 28.38 26 2.2 0.984 1.245 78 9.9 47.4 209.1 18:19 ( 82, 60)
Dec. 19 21 19.39 22 5.7 1.182 1.236 68 10.3 30.4 205.9 18:21 ( 83, 50)
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Image:
1998 Dec. 13
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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)
Dec. 12 18 48.00 37 25.2 2.030 1.831 64 10.2 8.4 25.1 18:19 (116, 32)
Dec. 19 18 50.44 38 27.6 2.012 1.806 63 10.1 11.3 24.2 18:21 (120, 28)
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Image:
1998 Dec. 13
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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. 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. 12 7 25.86 41 2.3 0.903 1.812 147 11.2 1.9 11.5 2:04 (180, 84)
Dec. 19 7 25.08 41 9.9 0.864 1.797 152 11.1 2.9 275.9 1:36 (180, 84)
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Image:
1998 Dec. 13
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Brightening while approaching to the earth and the tail is getting greater. Now it is 10 mag visually. It will be 11 mag until next April. 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. 12 6 54.87 40 25.1 1.386 2.306 152 11.4 8.5 233.9 1:34 (180, 85)
Dec. 19 6 50.04 39 44.2 1.339 2.285 158 11.2 11.2 232.9 1:01 (180, 85)
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Only observable in the Southern Hemisphere. It was 11.0 mag in late November.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 6 30.06 -73 22.4 7.217 7.160 82 11.5 9.0 247.2 1:10 ( 0,-18)
Dec. 19 6 16.20 -73 41.2 7.276 7.219 82 11.6 8.7 257.0 0:28 ( 0,-19)
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Image:
1998 Dec. 13
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It was 10 mag and diffused in November. It will fade rapidly after this, one reported that 12.2 mag on Dec. 9. C/1997 J2 is close.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 21 8.99 -20 0.4 1.985 1.617 54 11.7 45.9 71.8 18:19 ( 40, 24)
Dec. 19 21 30.15 -18 16.6 2.062 1.653 52 12.0 44.8 70.3 18:21 ( 43, 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. 88P is close.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 21 20.02 -17 28.4 4.489 4.042 57 13.0 11.1 116.2 18:19 ( 39, 28)
Dec. 19 21 25.08 -18 0.1 4.629 4.084 51 13.1 11.4 111.5 18:21 ( 44, 24)
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Image:
1998 Dec. 13
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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)
Dec. 12 23 37.35 5 45.6 2.646 2.938 97 13.8 19.9 231.7 18:19 ( 3, 61)
Dec. 19 23 30.82 4 25.2 2.725 2.868 88 13.8 16.3 229.2 18:21 ( 20, 58)
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Image:
1998 Dec. 13
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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)
Dec. 12 6 32.90 47 59.7 0.872 1.796 150 13.8 7.5 251.1 1:12 (180, 77)
Dec. 19 6 27.40 47 32.8 0.883 1.821 154 14.0 10.0 238.4 0:39 (180, 77)
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Image:
1998 Dec. 13
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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 is very close to M72, M73 and Saturn Nebula (NGC 7009).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 20 58.19 -11 40.6 2.592 2.165 54 14.3 27.0 80.7 18:19 ( 47, 29)
Dec. 19 21 11.17 -11 6.7 2.618 2.126 50 14.1 28.4 79.3 18:21 ( 52, 27)
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Beginning to be observable. No observations are reported since July. CCD observers may catch it if it is in outburst. It has been at conjunction for a while, so observations are encouraged. Because we could not see the comet on the image on Dec. 6, so it should be fainter than 14.5 mag now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 14 45.79 -24 43.5 6.993 6.203 34 14.2 10.5 111.1 5:27 (308, 8)
Dec. 19 14 50.73 -25 9.8 6.924 6.201 39 14.1 10.1 111.6 5:32 (313, 12)
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Only observable in the Southern Hemisphere. Recent magnitude is faint as 14-16 mag. It is close by SN 1998ew (14 mag).
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 20 41.22 -70 11.1 3.010 2.587 55 14.5 30.3 75.5 18:19 ( 15,-20)
Dec. 19 21 20.07 -69 3.3 3.050 2.622 55 14.6 30.8 68.9 18:21 ( 15,-19)
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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 was observed as bright as 14.0 mag visually in late November.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 10 7.80 -35 1.9 4.565 4.665 89 14.7 15.7 190.2 4:46 ( 0, 20)
Dec. 19 10 5.72 -36 50.3 4.446 4.625 94 14.6 16.1 196.0 4:16 ( 0, 18)
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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. 12 20 28.44 -26 6.1 2.730 2.130 43 15.1 31.4 60.2 18:19 ( 44, 14)
Dec. 19 20 42.60 -24 14.7 2.765 2.110 40 15.1 32.1 59.8 18:21 ( 48, 13)
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Image:
1998 Dec. 12
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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)
Dec. 12 0 46.02 14 1.3 1.973 2.562 116 15.1 7.6 64.2 19:22 ( 0, 69)
Dec. 19 0 49.89 14 27.0 2.059 2.568 110 15.2 10.0 66.3 18:58 ( 0, 69)
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Image:
1998 Dec. 13
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Rapidly fading in November. 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)
Dec. 12 2 27.20 8 37.7 1.634 2.450 137 15.1 1.0 212.6 21:03 ( 0, 64)
Dec. 19 2 27.56 8 36.3 1.784 2.533 130 15.3 2.0 79.0 20:36 ( 0, 64)
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Image:
1998 Dec. 12
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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)
Dec. 12 19 21.73 24 54.8 3.419 2.997 56 15.4 24.2 73.2 18:19 ( 99, 34)
Dec. 19 19 33.80 25 45.9 3.472 3.027 55 15.5 24.8 71.9 18:21 (102, 30)
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Image:
1998 Dec. 11
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It keeps the current brightness for a while after this. Visual observers reported it as bright 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. 12 4 11.54 -4 21.2 0.844 1.760 148 15.6 25.0 330.6 22:46 ( 0, 51)
Dec. 19 4 6.31 -1 37.8 0.848 1.748 145 15.6 26.6 338.3 22:14 ( 0, 54)
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Image:
1998 Dec. 12
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15 mag both visually and by CCD. It will fade soon. Now the position is good, so it 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)
Dec. 12 0 11.01 25 29.6 1.394 1.980 111 16.2 17.8 75.8 18:47 ( 0, 81)
Dec. 19 0 20.51 26 1.5 1.475 2.001 107 16.4 19.9 76.1 18:29 ( 0, 81)
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Not yet observed in this return. It should be brightening from 19 mag to 16 mag during the conjunction. 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. 12 14 36.08 -19 40.4 2.741 2.045 37 16.4 35.0 110.8 5:27 (306, 13)
Dec. 19 14 52.64 -21 6.0 2.649 2.000 40 16.2 35.9 109.8 5:32 (310, 15)
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Image:
1998 Dec. 11
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Recovered after 59 years since 1939. All observations in MPEC reported it much fainter as 18-19 mag than the ephemeris. It will fade out 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. 12 3 25.73 18 48.3 2.497 3.410 154 16.8 7.4 251.0 22:01 ( 0, 74)
Dec. 19 3 22.69 18 32.9 2.551 3.413 146 16.9 5.7 249.6 21:30 ( 0, 74)
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Image:
1998 Nov. 29
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Reported magnitude has a large scatter from 16 to 19 mag. 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. 12 8 31.55 33 21.3 4.129 4.885 135 17.0 19.0 314.4 3:10 ( 0, 88)
Dec. 19 8 23.29 34 55.1 4.049 4.880 144 16.9 20.6 310.8 2:35 ( 0, 90)
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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. 12 3 4.09 14 2.1 3.579 4.442 147 16.9 7.6 266.4 21:39 ( 0, 69)
Dec. 19 3 0.77 14 0.1 3.655 4.453 139 17.0 6.2 269.3 21:08 ( 0, 69)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 3 45.74 -15 44.0 3.201 3.963 135 17.0 6.7 264.7 22:21 ( 0, 39)
Dec. 19 3 42.77 -15 43.4 3.248 3.959 130 17.0 5.6 277.9 21:50 ( 0, 39)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 1 25.75 12 26.3 1.352 2.076 124 17.4 10.9 72.7 20:02 ( 0, 67)
Dec. 19 1 31.34 12 52.1 1.428 2.090 118 17.6 13.6 72.3 19:40 ( 0, 68)
Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 22 5.53 -4 15.8 1.567 1.576 72 17.7 47.0 51.4 18:19 ( 35, 45)
Dec. 19 22 22.76 -0 52.2 1.622 1.592 70 17.9 46.9 52.2 18:21 ( 41, 46)
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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 become brighter than 18.0 mag now.
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Date(TT) R.A. (2000) Decl. Delta r Elong. m1 Mot.(') p.a. Best Time(A, h)
Dec. 12 7 50.31 26 28.2 1.526 2.398 144 18.1 1.3 324.2 2:29 ( 0, 81)
Dec. 19 7 49.21 26 36.4 1.447 2.361 152 17.9 3.6 290.2 2:00 ( 0, 82)
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