D/1998 Y1 (LINEAR)
T 1998 Nov. 21.58005 TT Nakano
q 1.7469972 (2000.0) P Q
n 0.00895324 Peri. 339.84266 +0.15576275 -0.87121992
a 22.9693702 Node 98.85878 +0.95853996 +0.01946636
e 0.9239423 Incl. 28.10869 +0.23861918 +0.49050679
P 110.08
From 114 observations 1998 Dec. 22-1999 Feb. 20.
Residuals in seconds of arc
1998/ 981226 360 0.2+ 0.1- 990117 402 0.8- 0.9+
981222 704 0.5- 1.6+ 981226 360 0.4+ 0.1+ 990117 402 0.1+ 0.2-
981222 704 1.6- 2.0- 981226 360 0.3+ 0.2+ 990117 402 0.2- 0.2-
981222 704 1.0- 1.4- 981227 402 0.5+ 0.4+ 990117 118 0.3- 0.2+
981222 704 1.4- 0.3- 981227 402 0.2+ 0.0 990117 118 0.1+ 0.7+
981223 113 (2.4+ 0.3+) 981227 402 0.2+ 0.1+ 990117 118 0.8- 0.0
981223 113 0.3- 0.0 981227 900 0.2+ 0.3+ 990118 367 0.4- 0.2-
981223 557 0.7- 0.1+ 981227 900 0.8- 1.0+ 990118 367 0.1+ 0.8-
981223 557 0.1- 0.2- 981228 402 0.2- 0.0 990118 367 0.1+ 0.2+
981223 046 0.1- 0.1+ 981228 402 0.2+ 0.3- 990118 118 0.6+ 1.3+
981223 046 0.0 0.0 981228 402 0.7+ 0.4- 990118 118 0.5+ 1.2+
981223 046 0.1- 0.1- 981228 360 0.3+ 0.3+ 990118 118 1.1+ 1.2+
981223 046 0.4+ 0.4+ 981228 360 0.1+ 0.0 990121 360 0.4+ 0.2+
981224 046 0.4- 0.2- 981228 360 0.3+ 0.0 990121 360 0.8+ 0.2+
981224 709 0.1+ 0.1- 981228 046 0.1+ 0.3- 990121 360 0.3+ 0.1-
981224 709 0.1- 0.2- 981228 046 0.4+ 0.1+ 990121 355 0.0 0.1-
981224 709 0.3- 0.0 981228 046 0.1+ 0.1- 990121 355 0.4- 0.1+
981224 709 0.2- 0.1- 981229 355 0.3- 0.8+ 990122 046 0.6- 0.4+
981224 709 0.0 0.8- 981229 355 0.2+ 0.6- 990122 046 0.3- 0.5-
981224 670 1.1- 0.2- 981229 355 0.3- 0.1+ 990122 046 0.3- 0.2+
981224 670 0.0 1.0+ 981229 372 0.4- 0.9+ 990122 046 0.2- 0.5+
981224 670 0.1- 0.9- 981229 372 0.1+ 0.9+ 990122 402 0.2- 0.1+
981224 670 2.0- 0.2- 981230 897 0.4+ 0.7- 990122 402 0.4+ 0.8+
981224 670 2.0+ 0.2- 981230 897 0.9- 0.3- 990122 402 0.7+ 0.8-
981225 355 0.0 0.1- 981230 897 0.4+ 1.6- 990126 402 0.8- 0.6-
981225 355 0.2+ 0.2- 1999/ 990126 402 0.0 1.3-
981225 355 0.4+ 0.6+ 990105 367 1.0- 0.4- 990126 402 (0.7- 4.0-)
981225 897 0.1+ 0.2- 990105 367 0.1- 0.8+ 990206 402 0.5- 1.3-
981225 897 1.0+ 0.5+ 990105 367 1.0+ 1.0+ 990206 402 0.4+ 1.2+
981225 402 0.2+ 0.1+ 990105 402 0.7- 0.1+ 990206 402 0.5+ 0.3-
981225 402 0.1+ 0.5+ 990105 402 0.5+ 0.3+ 990214 360 0.4- 0.1+
981225 402 0.8+ 0.1+ 990105 402 0.2+ 0.5- 990214 360 0.8- 0.4-
981225 897 0.6- 0.9+ 990105 504 1.4+ 1.6- 990214 360 0.4+ 0.2-
981225 108 (2.4- 0.3-) 990105 504 1.4+ 1.0- 990217 360 1.3+ 0.3+
981225 108 1.0+ 1.1+ 990105 504 0.6+ 1.1- 990217 360 0.6- 0.1+
981225 046 0.8+ 0.2+ 990108 355 0.7- 1.0- 990217 360 0.1- 0.7+
981225 046 0.5+ 0.3+ 990108 355 0.7- 0.9- 990220 402 0.9+ 1.2-
981225 046 0.4- 0.2+ 990108 355 0.1- 0.4- 990220 402 0.7- 0.1+
981225 046 1.1+ 0.3+ 990109 897 1.4- 0.8- 990220 402 0.8- 0.4+
981225 046 0.5+ 0.2+ 990109 897 1.0- 0.7+
C/1998 Y1 (LINEAR)
T 1998 Nov. 21.59490 TT Nakano
q 1.7467811 (2000.0) P Q
n 0.00905150 Peri. 339.84998 +0.15569263 -0.87131008
a 22.8028377 Node 98.85794 +0.95852389 +0.01940041
e 0.9233963 Incl. 28.09907 +0.23872945 +0.49034923
P 108.89
From 93 observations 1998 Dec. 22-1999 Jan. 26.
◎C/1998 Y1の軌道と予報位置です
予想されたように周期が110年ほどの短周期彗星でした．
C/1998 Y1 (LINEAR)
T 1998 Nov. 21.59885 TT Nakano
q 1.7468176 (2000.0) P Q
n 0.00904877 Peri. 339.85272 +0.15564826 -0.87131374
a 22.8074251 Node 98.85801 +0.95852591 +0.01935112
e 0.9234101 Incl. 28.09960 +0.23875028 +0.49034467
P 108.92
From 83 observations 1998 Dec. 22-1999 Jan. 22.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
1999 Jan. 25 12 06 51.42 +37 18.7 0.998 1.923 20.0 / 358 16.8 59 .58
26 12 06 51.36 +37 38.7 1.008 1.928 19.3 / 359 16.9 46 .69
27 12 06 51.33 +37 58.0 1.018 1.933 18.7 / 0 16.9 34 .79
28 12 06 51.33 +38 16.7 1.029 1.939 18.1 / 1 16.9 24 .88
29 12 06 51.37 +38 34.8 1.039 1.944 17.5 / 3 17.0 19 .94
30 12 06 51.43 +38 52.3 1.050 1.949 16.9 / 4 17.0 23 .98
31 12 06 51.54 +39 09.2 1.061 1.955 16.4 / 6 17.0 33 1.00
Feb. 1 12 06 51.67 +39 25.5 1.072 1.960 15.8 / 7 17.1 45 .99
2 12 06 51.84 +39 41.3 1.083 1.966 15.3 / 9 17.1 57 .96
3 12 06 52.05 +39 56.4 1.095 1.971 14.8 / 11 17.1 68 .91
4 12 06 52.29 +40 11.0 1.107 1.977 14.4 / 13 17.2 80 .85
5 12 06 52.57 +40 25.0 1.119 1.983 14.0 / 15 17.2 92 .77
6 12 06 52.88 +40 38.5 1.131 1.988 13.5 / 17 17.3 103 .68
7 12 06 53.23 +40 51.5 1.143 1.994 13.2 / 19 17.3 114 .59
8 12 06 53.61 +41 03.9 1.156 2.000 12.8 / 22 17.3 124 .50
9 12 06 54.03 +41 15.9 1.168 2.006 12.5 / 24 17.4 135 .41
10 12 06 54.49 +41 27.3 1.181 2.012 12.2 / 27 17.4 144 .31
11 12 06 54.97 +41 38.2 1.194 2.018 12.0 / 29 17.4 152 .23
12 12 06 55.50 +41 48.7 1.207 2.024 11.8 / 32 17.5 157 .15
13 12 06 56.06 +41 58.7 1.220 2.030 11.6 / 35 17.5 156 .09
14 12 06 56.66 +42 08.2 1.234 2.036 11.5 / 38 17.5 150 .04
15 12 06 57.29 +42 17.3 1.247 2.042 11.4 / 40 17.6 140 .01
16 12 06 57.95 +42 25.9 1.261 2.048 11.3 / 43 17.6 129 .00
17 12 06 58.65 +42 34.1 1.275 2.055 11.2 / 46 17.7 116 .02
18 12 06 59.38 +42 41.9 1.289 2.061 11.2 / 49 17.7 104 .06
19 12 07 00.15 +42 49.3 1.303 2.067 11.2 / 51 17.7 91 .13
20 12 07 00.95 +42 56.3 1.318 2.074 11.3 / 54 17.8 78 .22
21 12 07 01.78 +43 03.0 1.332 2.080 11.3 / 57 17.8 65 .32
22 12 07 02.64 +43 09.2 1.347 2.087 11.4 / 59 17.8 53 .43
23 12 07 03.54 +43 15.1 1.362 2.093 11.5 / 61 17.9 41 .54
24 12 07 04.47 +43 20.6 1.376 2.100 11.6 / 64 17.9 31 .65
25 12 07 05.42 +43 25.7 1.391 2.106 11.8 / 66 18.0 25 .76
26 12 07 06.41 +43 30.6 1.406 2.113 11.9 / 68 18.0 25 .84
27 12 07 07.42 +43 35.1 1.422 2.120 12.1 / 70 18.0 31 .92
28 12 07 08.46 +43 39.2 1.437 2.126 12.2 / 72 18.1 40 .97
Mar. 1 12 07 09.53 +43 43.1 1.452 2.133 12.4 / 73 18.1 51 .99
NAKANO
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(C) Copyright 1999 OAA/ComputingSection
write mail from CFAD0::NAKANO on 1999-01-25 19:59:10(JST).
C/1998 Y1 (LINEAR)
T 1998 Nov. 21.61251 TT Nakano
q 1.7442718 (2000.0) P Q
n 0.00983685 Peri. 339.83853 +0.15624785 -0.87191638
a 21.5724100 Node 98.84993 +0.95834996 +0.02011230
e 0.9191434 Incl. 28.01144 +0.23906479 +0.48924157
P 100.20
From 68 observations 1998 Dec. 22-1999 Jan. 8.
戻ります。