◎P/1998 W2の軌道と予報位置です
現在，赤緯が-45ﾟふきんを動いているこの彗星ですが，サイディング・
スプリングの観測グループによって本夜に検出されました．検出光度は，
18等，観測は，まだ，１夜で確認の観測が必要です．
なお，彗星の位置は，予報軌道（HICQ 2005, p. H70）から，赤経方向
に-0ﾟ.16，赤緯方向に-0ﾟ.14のずれがあり，儺= +0.28日でした．
P/1998 W2 (Hergenrother)
Epoch 2005 Nov. 6.0 TT = JDT 2453680.5
T 2005 Nov. 2.48040 TT Nakano
q 1.4257649 (2000.0) P Q
n 0.14235387 Peri. 13.87828 +0.98257388 -0.18447594
a 3.6326470 Node 356.50346 +0.11391443 +0.69434132
e 0.6075135 Incl. 21.89413 +0.14687436 +0.69559957
P 6.92
From 72 observations 1998-2005, mean residual 0".89.
Residuals in seconds of arc
1998/ 981125 402 0.1- 0.1+ 990105 402 1.3+ 0.9-
981121 703 0.3+ 1.8+ 981128 402 0.6+ 0.9+ 990105 402 0.9- 0.3-
981121 703 (2.7+ 2.5+) 981128 402 1.1+ 0.4+ 990113 360 1.1- 0.7-
981122 703 (4.5+ 0.3-) 981128 402 0.3- 0.6- 990113 360 1.6- 1.3-
981122 703 (4.5+ 0.4-) 981128 426 1.7+ 0.8- 990113 360 0.1- 0.7-
981122 703 0.4+ 1.2+ 981128 426 0.9+ 0.7- 990114 693 1.3- 0.9-
981123 693 0.1- 0.9+ 981128 426 0.0 0.4+ 990114 693 1.5- 1.1-
981123 693 0.6- 0.8+ 981213 693 1.4- 0.0 990114 693 1.1- 1.2-
981123 693 0.5- 0.6+ 981213 693 1.7- 0.4- 990115 693 (0.3- 2.3-)
981123 693 0.2- 1.0+ 981216 402 1.8+ 0.8+ 990115 693 0.0 1.6-
981123 691 0.0 0.5+ 981216 402 0.1+ 0.7- 990115 693 0.3- 1.8-
981123 691 0.0 1.1+ 981216 402 1.1- 0.1+ 990213 693 1.1- 0.0
981123 360 0.2- 0.3+ 981216 402 1.5- 1.2- 990213 693 0.7- 0.6-
981123 360 0.4- 0.5+ 981217 402 0.2+ 0.1+ 990213 693 1.0- 1.1-
981123 360 0.4+ 0.4+ 981217 402 0.1+ 0.6- 990214 693 1.3- 1.7-
981124 691 0.2- 0.7+ 981217 402 (0.6- 2.2-) 990214 693 0.9- 0.8-
981124 691 0.5- 0.4+ 981219 691 1.0- 0.6- 990214 693 0.8- 1.2-
981124 691 0.1+ 1.0+ 981219 691 1.5- 1.0- 990412 693 0.6- 0.7-
981124 709 0.7+ 0.7+ 981223 402 1.8+ 0.5- 990412 693 0.2- 1.0-
981124 709 0.0 0.7+ 981223 402 0.4+ 1.8- 990415 693 0.9+ 1.2-
981124 709 0.4+ 0.8+ 981223 402 1.6+ 0.0 990415 693 1.5+ 0.8-
981124 709 0.9- 0.4+ 981223 402 2.0+ 0.8- 990415 693 1.2+ 0.8-
981124 709 0.2+ 0.8+ 981223 118 0.4+ 0.1- 2005/
981124 426 0.3- 1.6+ 981223 118 0.2+ 0.7- 050705 E12 0.4+ 0.5-
981124 426 0.7- 0.7+ 981223 118 1.1+ 0.5+ 050705 E12 0.3+ 0.3-
981125 402 (0.2- 2.7-) 1999/ 050705 E12 0.5+ 0.7-
981125 402 1.0- 0.4- 990105 402 1.1- 1.0- 050705 E12 0.6+ 0.6-
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2005 July 5 18 22 32.64 -45 45.1 1.084 1.915 6.6 / 132 18.5 129 .01
6 18 22 33.11 -45 49.5 1.073 1.909 6.2 / 134 18.5 137 .00
7 18 22 33.54 -45 53.8 1.061 1.902 5.9 / 138 18.4 145 .02
8 18 22 33.92 -45 58.2 1.050 1.896 5.5 / 141 18.4 149 .05
9 18 22 34.25 -46 02.4 1.039 1.889 5.2 / 145 18.3 150 .09
10 18 22 34.54 -46 06.7 1.028 1.883 4.9 / 149 18.3 147 .16
11 18 22 34.78 -46 10.9 1.017 1.876 4.6 / 154 18.3 140 .23
12 18 22 34.98 -46 15.0 1.006 1.870 4.3 / 160 18.2 132 .32
13 18 22 35.12 -46 19.0 0.995 1.864 4.0 / 166 18.2 123 .41
14 18 22 35.21 -46 22.9 0.985 1.857 3.8 / 174 18.2 112 .51
15 18 22 35.25 -46 26.8 0.974 1.851 3.7 / 182 18.1 101 .61
16 18 22 35.24 -46 30.5 0.964 1.844 3.6 / 190 18.1 90 .72
17 18 22 35.18 -46 34.0 0.954 1.838 3.6 / 199 18.0 78 .81
18 18 22 35.07 -46 37.5 0.944 1.832 3.7 / 208 18.0 66 .89
19 18 22 34.90 -46 40.7 0.934 1.826 3.8 / 217 18.0 54 .95
20 18 22 34.67 -46 43.8 0.924 1.819 4.1 / 225 17.9 43 .99
21 18 22 34.40 -46 46.6 0.915 1.813 4.3 / 232 17.9 34 1.00
22 18 22 34.06 -46 49.3 0.905 1.807 4.7 / 239 17.9 31 .97
23 18 22 33.67 -46 51.7 0.896 1.801 5.1 / 245 17.8 33 .92
24 18 22 33.22 -46 53.9 0.887 1.795 5.5 / 250 17.8 41 .84
25 18 22 32.72 -46 55.8 0.878 1.788 6.0 / 254 17.7 52 .75
26 18 22 32.15 -46 57.4 0.869 1.782 6.5 / 258 17.7 63 .65
27 18 22 31.53 -46 58.8 0.860 1.776 7.0 / 262 17.7 74 .54
28 18 22 30.85 -46 59.7 0.851 1.770 7.6 / 265 17.6 85 .44
29 18 22 30.11 -47 00.4 0.843 1.764 8.1 / 268 17.6 97 .34
30 18 22 29.32 -47 00.6 0.834 1.758 8.7 / 271 17.6 107 .25
31 18 22 28.46 -47 00.5 0.826 1.752 9.3 / 273 17.5 118 .17
Aug. 1 18 22 27.55 -46 59.9 0.818 1.746 10.0 / 276 17.5 127 .10
2 18 22 26.58 -46 58.8 0.810 1.740 10.6 / 278 17.4 136 .05
3 18 22 25.56 -46 57.3 0.802 1.735 11.2 / 280 17.4 144 .02
4 18 22 24.48 -46 55.3 0.795 1.729 11.9 / 282 17.4 149 .00
5 18 22 23.35 -46 52.7 0.787 1.723 12.5 / 284 17.3 150 .00
NAKANO
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(C) Copyright 2005 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2005-07-06 04:59:28(JST).
P/1998 W2 (Hergenrother)
Epoch 2005 Nov. 6.0 TT = JDT 2453680.5
T 2005 Nov. 2.17239 TT Nakano
q 1.4257692 (2000.0) P Q
n 0.14237122 Peri. 13.88004 +0.98256950 -0.18449891
a 3.6323519 Node 356.50300 +0.11392963 +0.69434274
e 0.6074804 Incl. 21.89383 +0.14689184 +0.69559205
P 6.92 (+/- 0.07 day)
From 65 observations 1998 Nov. 21-1999 Apr. 15, mean residual 0".63.
NAKANO
**** Don't distribute anyone except personal use only ****
(C) Copyright 2002 OAA/ComputingSection
write mail from CFAD0::NAKANO on 2002-05-10 00:07:37(JST).
P/1998 W2 (Hergenrother)
T 1998 Dec. 5.92271 TT Nakano
q 1.4209048 (2000.0) P Q
n 0.14126728 Peri. 13.87191 +0.98266869 -0.18394327
a 3.6512508 Node 356.47596 +0.11328999 +0.69397063
e 0.6108444 Incl. 21.93269 +0.14672295 +0.69611036
P 6.98
From 49 observations 1998 Nov. 21-1999 Jan. 13.
P/1998 W2 (Hergenrother)
T 1998 Dec. 6.08854 TT Nakano
q 1.4181953 (2000.0) P Q
n 0.14624758 Peri. 13.99582 +0.98199701 -0.18757310
a 3.5678801 Node 356.57092 +0.11634831 +0.69369843
e 0.6025104 Incl. 21.91122 +0.14881176 +0.69541269
P 6.74
From 45 observations 1998 Nov. 21-Dec. 23.
戻ります。