C/2000 Y2
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5
T 2001 Mar. 21.82283 TT Nakano
q 2.7687148 (2000.0) P Q
z +0.0020346 Peri. 326.82292 -0.88714936 -0.46098888
+/-0.0000059 Node 185.84816 +0.45572305 -0.86785888
e 0.9943668 Incl. 12.08753 +0.07268092 -0.18523016
From 144 observations 2000 Nov. 26-2001 June 11, mean residual 0".58.
Residuals in seconds of arc
2000/ 010103 349 0.1+ 0.4- 010314 608 0.1+ 0.1+
001126 704 0.2- 0.6- 010104 411 0.7- 0.2+ 010314 608 0.2+ 0.0
001126 704 0.8+ 0.1+ 010104 411 1.4- 0.1- 010314 608 0.4+ 0.1-
001126 704 0.2+ 0.0 010104 411 1.5- 0.3- 010317 704 0.0 1.0-
001126 704 0.1- 0.3+ 010104 372 1.4+ 0.5- 010317 704 0.4+ 0.1+
001227 699 0.2+ 0.2+ 010105 372 1.4- 0.4+ 010317 704 1.1+ 0.5+
001227 699 1.1+ 0.7+ 010118 372 0.5+ 0.3+ 010317 704 0.6- 0.9-
001227 699 1.2+ 1.3+ 010120 372 0.4- 0.1- 010317 704 0.6+ 1.2+
001227 699 1.3+ 1.4+ 010121 372 0.5- 0.7+ 010318 349 0.2- 0.2-
001227 688 0.0 0.2+ 010202 352 0.4- 0.5+ 010318 349 1.1- 0.4-
001227 688 0.4- 0.4+ 010202 352 0.3- 0.0 010318 349 1.0- 0.7-
001228 897 0.7+ 0.3- 010202 352 0.5- 0.1+ 010323 699 0.1+ 0.3-
001228 897 0.2+ 0.4- 010210 201 0.1- 0.1+ 010323 699 0.3- 0.0
001228 897 0.4+ 0.3- 010210 201 0.4- 0.3+ 010323 699 0.2- 0.5+
001228 372 0.1- 0.2- 010210 201 0.1- 0.2+ 010323 699 0.0 0.1+
001228 372 0.4- 0.4- 010218 349 0.9+ 0.1- 010326 360 0.1+ 0.1-
001228 349 0.7- 1.6+ 010218 349 0.6+ 1.1+ 010326 360 0.3- 0.3-
001228 349 0.3+ 0.6- 010218 349 0.3- 0.7+ 010330 704 0.9- 0.4-
001228 349 (2.3- 0.9-) 010219 608 (0.4+ 2.9+) 010330 704 0.6- 0.3+
001228 349 (2.6+ 0.8+) 010219 608 (0.9+ 2.2+) 010330 704 0.7+ 0.3-
001228 046 0.6- 0.3+ 010219 608 0.2- 1.9+ 010330 704 0.4+ 0.5+
001228 046 0.1- 0.8- 010219 360 0.4- 0.0 010406 608 0.4+ 0.2+
001228 046 0.2+ 0.4- 010219 360 0.4- 0.1- 010406 608 0.7+ 0.4-
001229 557 0.1+ 0.6- 010219 176 0.5+ 0.1- 010406 608 1.2+ 0.3+
001229 557 0.5- 0.0 010219 176 0.1- 1.0+ 010417 704 0.6- 0.2+
001229 897 0.7- 1.1+ 010219 176 0.3+ 0.5- 010417 704 0.8+ 0.2-
001229 897 0.2- 0.7+ 010220 608 0.7- 0.9- 010417 704 0.1+ 0.3+
001229 897 0.2- 0.8- 010220 608 0.4- 0.8- 010417 704 0.3- 0.3-
001229 897 0.4- 0.4+ 010220 608 0.6- 0.9- 010417 704 0.1- 0.0
001229 360 0.4+ 0.3- 010222 746 0.2+ 0.5+ 010418 704 0.7- 0.0
001229 360 0.3+ 0.4- 010222 746 0.2+ 0.1+ 010418 704 0.1+ 0.5-
001229 360 0.6+ 0.2- 010222 746 0.5- 0.5+ 010418 704 1.0- 0.4-
001229 402 0.8+ 0.2- 010222 746 0.1+ 0.1- 010418 704 0.1- 0.3-
001229 402 0.4+ 0.2- 010222 746 0.3- 0.1- 010418 704 0.0 0.4+
001229 402 0.3+ 0.3- 010222 746 0.3- 0.1+ 010419 360 0.1- 0.2-
001229 867 0.2+ 0.5- 010222 704 0.1- 0.7- 010419 360 0.2- 0.4-
001229 867 0.1+ 0.4- 010222 704 1.4+ 0.6+ 010419 402 0.3- 0.5-
001229 867 0.3+ 0.4- 010222 704 0.7+ 0.8+ 010419 402 0.0 0.2-
001229 349 (0.6- 2.0+) 010222 704 0.3- 0.9+ 010419 402 0.6- 0.1+
001229 349 0.1+ 0.5+ 010222 704 0.8- 1.4+ 010422 704 0.2+ 0.8-
001229 349 1.0- 1.0+ 010226 348 0.0 0.7- 010422 704 0.1+ 0.0
001231 372 0.6- 1.2- 010226 348 0.1- 0.1+ 010422 704 0.7+ 0.1+
2001/ 010226 360 0.5- 0.3- 010422 704 0.2+ 0.2+
010101 461 0.4+ 0.3+ 010226 360 0.4- 0.1- 010422 704 0.8+ 0.5+
010101 461 0.6+ 0.0 010303 704 0.9+ 1.4- 010426 704 0.4- 0.4-
010101 411 0.3+ 0.8- 010303 704 0.6- 1.1- 010426 704 1.1+ 1.0+
010101 411 0.1+ 0.9- 010303 704 1.0+ 0.4+ 010426 704 1.0+ 0.2+
010101 411 0.3- 1.3- 010303 704 0.5+ 0.3- 010611 360 0.0 0.4+
010103 349 0.5- 0.2+ 010303 704 0.2+ 1.2+ 010611 360 0.2+ 0.0
010103 349 0.6+ 0.8- 010313 360 0.6- 0.2+
010103 349 0.1+ 0.2+ 010313 360 0.5- 0.1+
NAKANO
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C/2000 Y2
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5
T 2001 Mar. 21.81056 TT Nakano
q 2.7687729 (2000.0) P Q
z +0.0020346 Peri. 326.81881 -0.88711695 -0.46105123
+/-0.0000076 Node 185.84824 +0.45578414 -0.86782693
e 0.9943666 Incl. 12.08756 +0.07269336 -0.18522469
From 116 observations 2000 Nov. 26-2001 Mar. 30, mean residual 0".60.
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C/2000 Y2
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5
T 2001 Mar. 21.77769 TT Nakano
q 2.7688753 (2000.0) P Q
z +0.0020407 Peri. 326.80695 -0.88703269 -0.46121310
+/-0.0000090 Node 185.84967 +0.45594310 -0.86774252
e 0.9943497 Incl. 12.08736 +0.07272480 -0.18521713
From 77 observations 2000 Nov. 26-2001 Feb. 26, mean residual 0".62.
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C/2000 Y2
Epoch 2001 Apr. 1.0 TT = JDT 2452000.5
T 2001 Mar. 21.72484 TT Nakano
q 2.7690939 (2000.0) P Q
z +0.0020340 Peri. 326.78525 -0.88689567 -0.46147576
+/-0.0001229 Node 185.85448 +0.45620231 -0.86760381
e 0.9943676 Incl. 12.08682 +0.07277035 -0.18521271
From 53 observations 2000 Nov. 26-2001 Jan. 21, mean residual 0".62.
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C/2000 Y2
T 2001 Mar. 18.50081 TT Nakano
q 2.7848650 (2000.0) P Q
Peri. 325.51319 -0.87848724 -0.47724786
Node 186.10726 +0.47175923 -0.85914397
e 1.0 Incl. 12.06653 +0.07552076 -0.18467844
From 50 observations 2000 Nov. 26-2001 Jan. 5.
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C/2000 Y2
T 2001 May 12.89193 TT Nakano
q 2.4534875 (2000.0) P Q
Peri. 350.90369 -0.99060289 -0.13668307
Node 181.27118 +0.13517490 -0.97301840
e 1.0 Incl. 12.66536 +0.02082468 -0.18588422
From 42 observations 2000 Dec. 27-2001 Jan. 4.
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◎C/2000 Y2の軌道と予報位置です
彗星が，短周期彗星である可能性は，まず，なくなりました．
C/2000 Y2
T 2001 May 13.37299 TT Nakano
q 2.4481298 (2000.0) P Q
Peri. 351.20549 -0.99117118 -0.13250753
Node 181.20937 +0.13103249 -0.97360845
e 1.0 Incl. 12.67225 +0.02025263 -0.18581801
From 38 observations 2000 Dec. 27-2001 Jan. 4.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2001 Jan. 1 14 09 24.87 +00 33.3 2.044 2.835 2.0 / 136 17.6 143 .37
2 14 09 24.96 +00 31.9 2.031 2.830 1.7 / 139 17.6 132 .46
3 14 09 25.03 +00 30.7 2.017 2.824 1.4 / 142 17.5 120 .57
4 14 09 25.09 +00 29.6 2.004 2.819 1.1 / 148 17.5 108 .67
5 14 09 25.13 +00 28.7 1.991 2.814 0.8 / 156 17.5 95 .76
6 14 09 25.15 +00 28.0 1.979 2.809 0.5 / 174 17.5 82 .85
7 14 09 25.15 +00 27.4 1.966 2.804 0.4 / 209 17.4 68 .93
8 14 09 25.14 +00 27.1 1.954 2.798 0.5 / 250 17.4 54 .98
9 14 09 25.11 +00 26.9 1.941 2.793 0.7 / 272 17.4 40 1.00
10 14 09 25.06 +00 27.0 1.929 2.788 1.0 / 283 17.4 27 .99
11 14 09 25.00 +00 27.2 1.918 2.783 1.3 / 289 17.4 18 .95
12 14 09 24.92 +00 27.6 1.906 2.778 1.5 / 293 17.3 19 .89
13 14 09 24.83 +00 28.2 1.895 2.773 1.8 / 296 17.3 29 .81
14 14 09 24.72 +00 29.0 1.884 2.768 2.1 / 298 17.3 41 .71
15 14 09 24.59 +00 30.0 1.873 2.763 2.4 / 300 17.3 54 .60
16 14 09 24.45 +00 31.2 1.862 2.758 2.7 / 301 17.3 66 .49
17 14 09 24.29 +00 32.6 1.852 2.753 3.0 / 302 17.2 79 .39
18 14 09 24.12 +00 34.2 1.841 2.748 3.3 / 303 17.2 91 .29
19 14 09 23.94 +00 36.0 1.831 2.744 3.6 / 304 17.2 103 .21
20 14 09 23.74 +00 38.1 1.822 2.739 3.9 / 305 17.2 114 .14
21 14 09 23.53 +00 40.3 1.812 2.734 4.1 / 306 17.2 126 .08
22 14 09 23.31 +00 42.7 1.803 2.729 4.4 / 307 17.1 137 .03
23 14 09 23.07 +00 45.4 1.794 2.725 4.7 / 308 17.1 147 .01
24 14 09 22.83 +00 48.2 1.785 2.720 4.9 / 308 17.1 156 .00
25 14 09 22.57 +00 51.3 1.776 2.715 5.2 / 309 17.1 162 .01
26 14 09 22.30 +00 54.5 1.768 2.711 5.4 / 310 17.1 162 .04
27 14 09 22.02 +00 58.0 1.760 2.706 5.6 / 310 17.1 155 .08
28 14 09 21.74 +01 01.7 1.752 2.701 5.9 / 311 17.0 145 .14
29 14 09 21.44 +01 05.5 1.745 2.697 6.1 / 312 17.0 134 .21
30 14 09 21.14 +01 09.6 1.738 2.692 6.3 / 313 17.0 122 .30
31 14 09 20.83 +01 13.9 1.731 2.688 6.5 / 313 17.0 110 .40
Feb. 1 14 09 20.52 +01 18.3 1.724 2.684 6.7 / 314 17.0 98 .50
2 14 09 20.19 +01 22.9 1.717 2.679 6.9 / 315 17.0 85 .61
3 14 09 19.87 +01 27.8 1.711 2.675 7.0 / 315 16.9 72 .71
4 14 09 19.54 +01 32.8 1.705 2.671 7.2 / 316 16.9 58 .81
5 14 09 19.21 +01 38.0 1.699 2.666 7.3 / 317 16.9 45 .89
6 14 09 18.87 +01 43.4 1.694 2.662 7.5 / 318 16.9 31 .96
7 14 09 18.54 +01 48.9 1.689 2.658 7.6 / 318 16.9 20 .99
8 14 09 18.20 +01 54.6 1.684 2.654 7.8 / 319 16.9 17 1.00
9 14 09 17.86 +02 00.5 1.679 2.650 7.9 / 320 16.9 25 .97
10 14 09 17.53 +02 06.5 1.675 2.645 8.0 / 321 16.8 37 .92
11 14 09 17.19 +02 12.7 1.670 2.641 8.1 / 322 16.8 51 .85
12 14 09 16.86 +02 19.0 1.666 2.637 8.2 / 323 16.8 64 .76
13 14 09 16.53 +02 25.5 1.663 2.633 8.2 / 324 16.8 77 .66
14 14 09 16.20 +02 32.1 1.659 2.629 8.3 / 324 16.8 90 .56
15 14 09 15.88 +02 38.9 1.656 2.625 8.4 / 325 16.8 102 .46
NAKANO
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write mail from CFAD0::NAKANO on 2001-01-05 04:50:59(JST).
◎C/2000 Y2の軌道と予報位置です
その後，上尾の門田健一氏から２夜目，千代田の小島卓雄氏から３夜目の
観測が報告され，次の初期軌道を決定しました．彗星の動きが遅いために，
軌道は動くでしょう．
C/2000 Y2
T 2001 June 4.46969 TT Nakano
q 1.8762533 (2000.0) P Q
Peri. 19.67097 -0.97238111 +0.23190899
Node 173.56464 -0.23292888 -0.95707530
e 1.0 Incl. 13.58595 -0.01480238 -0.17385366
From 15 observations 2000 Dec. 27-29.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2000 Dec. 25 14 09 23.74 +00 47.9 1.968 2.703 4.1 / 128 17.8 128 .00
26 14 09 23.96 +00 45.3 1.951 2.695 3.8 / 129 17.8 139 .01
27 14 09 24.15 +00 42.9 1.933 2.687 3.5 / 130 17.7 150 .03
28 14 09 24.33 +00 40.7 1.916 2.679 3.2 / 131 17.7 158 .07
29 14 09 24.49 +00 38.6 1.899 2.671 2.8 / 132 17.7 163 .13
30 14 09 24.63 +00 36.7 1.883 2.663 2.5 / 134 17.6 160 .20
31 14 09 24.76 +00 34.9 1.866 2.655 2.2 / 135 17.6 153 .28
2001 Jan. 1 14 09 24.86 +00 33.4 1.850 2.646 1.9 / 138 17.6 143 .37
2 14 09 24.94 +00 32.0 1.833 2.638 1.5 / 141 17.5 132 .46
3 14 09 25.01 +00 30.8 1.817 2.630 1.2 / 146 17.5 120 .57
4 14 09 25.05 +00 29.8 1.801 2.622 .9 / 154 17.5 108 .67
5 14 09 25.08 +00 29.0 1.786 2.614 .6 / 170 17.4 95 .76
6 14 09 25.09 +00 28.4 1.770 2.606 .4 / 203 17.4 82 .85
7 14 09 25.07 +00 28.0 1.755 2.598 .5 / 246 17.4 68 .93
8 14 09 25.04 +00 27.8 1.740 2.590 .7 / 270 17.3 54 .98
9 14 09 24.99 +00 27.8 1.725 2.583 1.0 / 282 17.3 40 1.00
10 14 09 24.93 +00 28.0 1.710 2.575 1.4 / 288 17.3 27 .99
11 14 09 24.84 +00 28.4 1.696 2.567 1.7 / 292 17.2 18 .95
12 14 09 24.73 +00 29.1 1.682 2.559 2.1 / 295 17.2 19 .89
13 14 09 24.61 +00 29.9 1.668 2.551 2.4 / 297 17.2 29 .81
14 14 09 24.47 +00 31.1 1.654 2.543 2.8 / 299 17.1 41 .71
15 14 09 24.31 +00 32.4 1.640 2.535 3.1 / 300 17.1 54 .60
16 14 09 24.13 +00 34.0 1.627 2.528 3.5 / 302 17.1 66 .49
17 14 09 23.93 +00 35.8 1.614 2.520 3.8 / 303 17.1 79 .39
18 14 09 23.72 +00 37.8 1.601 2.512 4.2 / 304 17.0 91 .29
19 14 09 23.49 +00 40.1 1.588 2.504 4.5 / 304 17.0 103 .21
20 14 09 23.24 +00 42.7 1.575 2.497 4.9 / 305 17.0 114 .14
NAKANO
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write mail from CFAD0::NAKANO on 2000-12-30 01:26:49(JST).
◎C/2000 Y2の予報位置です
千代田の小島卓雄氏は，12月28日夜，この彗星の追跡に成功しました．
氏によると，CCD全光度は18.1等，集光が強く，西にコマが広がっている
ように見えるとのことです．次の予報は，下のバイサラ軌道からです．
また，周期彗星でしょうか．．．
T/TT q (AU) e Peri. Node Inc. P
2000 Dec. 28.6355 2.778036 1.0 298.3778 189.3989 11.3852
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2000 Dec. 25 16 09 23.76 +00 47.7 2.045 2.778 4.1 / 128 18.0 129 .00
26 16 09 23.97 +00 45.1 2.036 2.778 3.8 / 129 18.0 140 .01
27 16 09 24.17 +00 42.7 2.027 2.778 3.5 / 130 18.0 150 .03
28 16 09 24.35 +00 40.5 2.018 2.778 3.1 / 131 18.0 159 .08
29 16 09 24.50 +00 38.4 2.010 2.778 2.8 / 132 18.0 163 .13
30 16 09 24.64 +00 36.5 2.001 2.778 2.5 / 133 17.9 160 .20
31 16 09 24.76 +00 34.9 1.993 2.778 2.1 / 135 17.9 152 .28
2001 Jan. 1 16 09 24.86 +00 33.3 1.985 2.778 1.8 / 137 17.9 142 .38
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戻ります。