C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98662 TT Nakano
q 4.7188015 (2000.0) P Q
z +0.0002935 Peri. 352.39328 -0.89276691 +0.16226309
+/-0.0000037 Node 210.29593 -0.35689941 -0.82403801
e 0.9986151 Incl. 56.42104 -0.27493646 +0.54280019
From 119 observations 1998 June 18-2000 Aug. 29, mean residual 0".76.
Residuals in seconds of arc
1998/ 990610 860 0.5- 1.0- 000314 402 0.3- 0.6-
980618 704 0.9- 0.7- 990611 372 0.7+ 1.2+ 000314 402 0.2- 0.8-
980618 704 1.5+ 1.3- 990611 867 0.3+ 1.0+ 000408 402 0.6- 1.4-
980618 704 0.8+ 1.1- 990611 867 0.4+ 1.0+ 000408 402 1.2+ 0.8+
980618 704 0.5+ 0.2+ 990611 867 0.0 0.5+ 000408 402 0.2+ 0.6+
1999/ 990611 620 0.1+ 0.8+ 000501 704 0.6+ 0.7+
990223 704 1.9+ 0.2- 990612 367 0.2- 0.3+ 000501 704 1.4+ 1.6+
990223 704 (3.2+ 2.0-) 990612 367 0.2- 0.3+ 000501 704 0.5+ 0.9-
990223 704 (0.2+ 3.5+) 990612 367 0.6- 0.0 000501 704 1.7- 0.3+
990320 645 0.5- 0.7+ 990612 504 0.7- 0.6- 000501 867 0.6+ 1.0+
990320 645 0.6- 0.6+ 990612 504 0.6- 0.3- 000501 867 0.7+ 0.2+
990324 704 0.8+ 1.1- 990612 108 (4.4+ 0.9+) 000502 704 0.5- 0.9-
990324 704 0.2+ 0.7- 990612 108 (2.2+ 0.1+) 000502 704 1.5- 0.6-
990324 704 1.7+ 1.6+ 990614 402 0.5+ 0.0 000502 704 (2.2- 0.6+)
990324 704 (0.5- 2.4+) 990614 897 0.1- 0.8+ 000502 704 0.8+ 1.0+
990328 699 1.0- 1.2- 990614 897 1.0+ 0.2+ 000502 704 0.6+ 0.1-
990328 699 0.6- 1.0- 990614 897 1.1+ 0.4+ 000503 704 0.1- 0.5+
990328 699 0.4- 1.2- 990619 071 0.3+ 0.5- 000503 704 0.7+ 0.5-
990512 704 (2.8+ 3.7-) 990619 071 0.1- 0.8- 000503 704 1.4+ 0.1-
990512 704 0.9- 1.2- 990619 620 0.4- 0.5- 000505 699 (3.7- 4.0-)
990512 704 (2.3+ 1.8+) 990619 071 0.1+ 0.2- 000505 699 (3.1- 4.5-)
990607 046 0.9- 0.6+ 990619 071 0.0 0.3+ 000505 699 0.3- 0.4-
990607 046 0.7- 0.6+ 990619 620 0.7- 0.1- 000505 699 1.4- 1.5-
990607 046 0.2- 0.9+ 990619 620 0.6- 0.5+ 000527 699 (1.8- 3.1-)
990607 046 0.3+ 0.7+ 990630 108 0.7+ 0.7- 000527 699 0.1- 1.4-
990608 713 0.3- 0.7- 990701 118 1.0+ 0.7+ 000527 699 (0.0 2.5-)
990608 713 0.1+ 1.5+ 990701 118 0.9+ 0.4- 000527 699 (0.8- 2.3-)
990608 713 0.5+ 0.2- 990707 360 0.2- 0.7+ 000604 402 0.1- 0.0
990608 711 0.8- 0.2+ 990707 360 0.4- 0.3+ 000604 402 0.2- 0.7-
990608 711 0.3- 0.5+ 990806 046 0.7+ 1.3+ 000604 402 1.7- 0.4+
990608 711 0.3- 0.2+ 990806 046 0.8- 0.6- 000606 699 (1.3- 2.6-)
990608 587 (2.9- 2.7-) 990806 046 0.6+ 0.9+ 000606 699 (0.9- 2.7-)
990608 587 0.0 0.7+ 990806 046 0.1+ 0.2- 000606 699 (0.6- 2.8-)
990608 108 0.2+ 1.6+ 990817 897 0.4+ 0.5- 000606 699 (2.4- 4.2-)
990608 108 (0.3- 2.4+) 990817 897 (0.4+ 2.3-) 000608 170 0.0 1.4+
990608 108 0.4- 0.3+ 990831 402 0.1+ 0.5- 000608 046 0.4- 0.7+
990608 108 0.8- 0.2+ 990831 402 0.0 0.4- 000608 046 0.8- 0.9+
990608 620 0.4- 0.9- 990831 402 1.0+ 0.2- 000608 046 0.2+ 0.4+
990608 620 0.1- 0.7- 991009 402 0.0 1.1- 000608 046 0.1- 0.5+
990608 620 0.2+ 0.2- 991009 402 0.1+ 0.1+ 000628 402 0.4+ 1.2-
990609 402 0.1+ 0.1- 991009 402 0.2+ 1.0+ 000628 402 1.2+ 1.7-
990609 402 0.4- 0.7- 2000/ 000628 402 (1.3- 2.1-)
990609 402 0.1+ 0.1+ 000301 402 0.5- 0.9- 000706 699 (1.3- 2.5-)
990609 360 0.2- 0.4+ 000301 402 0.3+ 0.8- 000706 699 0.0 1.5-
990609 360 0.5- 0.2+ 000301 402 1.7+ 0.3- 000706 699 (1.1- 3.2-)
990609 360 0.4- 0.4+ 000313 360 0.4- 0.5+ 000706 699 (1.4- 3.3-)
990609 372 1.0- 1.9+ 000313 360 0.5- 0.1+ 000829 867 0.2- 0.9+
990610 860 0.8- 1.0- 000313 360 0.1- 0.3+ 000829 867 1.6+ 1.3-
990610 860 0.3- 0.6- 000314 402 0.5- 1.0-
NAKANO
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C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98563 TT Nakano
q 4.7187966 (2000.0) P Q
z +0.0002947 Peri. 352.39315 -0.89276716 +0.16226111
+/-0.0000038 Node 210.29594 -0.35689776 -0.82403869
e 0.9986096 Incl. 56.42105 -0.27493780 +0.54279976
From 117 observations 1998 June 18-2000 July 6, mean residual 0".75.
NAKANO
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C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98405 TT Nakano
q 4.7187875 (2000.0) P Q
z +0.0002972 Peri. 352.39294 -0.89276733 +0.16225783
+/-0.0000038 Node 210.29599 -0.35689546 -0.82403943
e 0.9985976 Incl. 56.42111 -0.27494023 +0.54279961
From 114 observations 1998 June 18-2000 June 8, mean residual 0".73.
NAKANO
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C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98550 TT Nakano
q 4.7187938 (2000.0) P Q
z +0.0002958 Peri. 352.39313 -0.89276699 +0.16226079
+/-0.0000040 Node 210.29597 -0.35689785 -0.82403852
e 0.9986042 Incl. 56.42108 -0.27493822 +0.54280010
From 105 observations 1998 June 18-2000 May 5, mean residual 0".73.
NAKANO
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C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98462 TT Nakano
q 4.7187917 (2000.0) P Q
z +0.0002960 Peri. 352.39300 -0.89276702 +0.16225863
+/-0.0000038 Node 210.29600 -0.35689657 -0.82403873
e 0.9986031 Incl. 56.42115 -0.27493980 +0.54280042
From 87 observations 1998 June 18-2000 Mar. 14, mean residual 0".69.
NAKANO
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◎C/1999 F2の軌道と予報位置です
ダイニックの杉江淳氏（３月１日と14日），久万の中村彰正氏（３月13日）は，
明け方の空に回ってきたこの彗星を昨年10月（402）以来の観測に成功しました．
CCD 全光度は，日付順に，17.6，17.8，17.7等でした．中村氏によると，彗星は
淡く拡散したイメ−ジに変わっていたとのことです．なお，(1/a)org.= +0.000044,
(1/a)fut.= +0.000347, L= 7です．
C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.98462 TT Nakano
q 4.7187917 (2000.0) P Q
z +0.0002960 Peri. 352.39300 -0.89276702 +0.16225863
+/-0.0000038 Node 210.29600 -0.35689657 -0.82403873
e 0.9986031 Incl. 56.42115 -0.27493980 +0.54280042
From 87 observations 1998 June 18-2000 Mar. 14, mean residual 0".69.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2000 Mar. 15 18 17 30.00 +20 46.2 6.291 6.433 9.3 / 20 17.1 125 .77
16 18 17 30.23 +20 54.9 6.284 6.438 9.3 / 19 17.1 116 .86
17 18 17 30.44 +21 03.7 6.278 6.443 9.2 / 18 17.1 106 .93
18 18 17 30.65 +21 12.5 6.272 6.448 9.2 / 17 17.1 95 .97
19 18 17 30.84 +21 21.2 6.266 6.453 9.2 / 16 17.1 85 1.00
20 18 17 31.02 +21 30.0 6.259 6.458 9.1 / 15 17.1 75 .99
21 18 17 31.19 +21 38.8 6.253 6.463 9.1 / 14 17.1 65 .97
22 18 17 31.35 +21 47.6 6.247 6.468 9.1 / 13 17.1 57 .93
23 18 17 31.50 +21 56.4 6.242 6.473 9.0 / 12 17.1 50 .87
24 18 17 31.64 +22 05.3 6.236 6.478 9.0 / 11 17.1 45 .79
25 18 17 31.77 +22 14.1 6.230 6.483 9.0 / 10 17.1 42 .71
26 18 17 31.89 +22 22.9 6.224 6.488 8.9 / 9 17.1 42 .62
27 18 17 31.99 +22 31.7 6.219 6.493 8.9 / 8 17.1 45 .52
28 18 17 32.09 +22 40.5 6.213 6.498 8.9 / 7 17.1 50 .43
29 18 17 32.17 +22 49.3 6.208 6.503 8.8 / 6 17.1 56 .34
30 18 17 32.24 +22 58.0 6.203 6.508 8.8 / 5 17.1 64 .25
31 18 17 32.30 +23 06.8 6.198 6.513 8.8 / 5 17.1 72 .17
Apr. 1 18 17 32.35 +23 15.6 6.193 6.518 8.7 / 4 17.1 81 .10
2 18 17 32.39 +23 24.3 6.188 6.523 8.7 / 3 17.1 91 .05
3 18 17 32.42 +23 33.0 6.183 6.528 8.7 / 1 17.1 101 .01
4 18 17 32.44 +23 41.7 6.178 6.533 8.7 / 0 17.1 110 .00
5 18 17 32.44 +23 50.3 6.173 6.538 8.6 / 359 17.1 119 .01
6 18 17 32.44 +23 59.0 6.169 6.543 8.6 / 358 17.1 127 .05
7 18 17 32.42 +24 07.6 6.165 6.548 8.6 / 357 17.1 133 .11
8 18 17 32.39 +24 16.1 6.160 6.553 8.5 / 356 17.1 136 .20
9 18 17 32.35 +24 24.7 6.156 6.558 8.5 / 355 17.1 135 .30
10 18 17 32.30 +24 33.1 6.152 6.563 8.5 / 354 17.1 131 .41
11 18 17 32.24 +24 41.6 6.148 6.568 8.5 / 353 17.1 124 .52
12 18 17 32.17 +24 50.0 6.145 6.573 8.4 / 352 17.1 116 .63
13 18 17 32.09 +24 58.3 6.141 6.578 8.4 / 351 17.1 107 .74
14 18 17 32.00 +25 06.7 6.138 6.583 8.4 / 350 17.1 97 .83
15 18 17 31.89 +25 14.9 6.134 6.588 8.3 / 349 17.1 88 .90
16 18 17 31.78 +25 23.1 6.131 6.593 8.3 / 348 17.1 78 .96
17 18 17 31.66 +25 31.3 6.128 6.598 8.3 / 347 17.1 69 .99
18 18 17 31.52 +25 39.3 6.125 6.603 8.3 / 346 17.1 61 1.00
19 18 17 31.38 +25 47.4 6.123 6.608 8.2 / 345 17.1 55 .99
20 18 17 31.22 +25 55.3 6.120 6.613 8.2 / 344 17.1 50 .96
21 18 17 31.06 +26 03.2 6.118 6.618 8.2 / 343 17.1 47 .91
22 18 17 30.88 +26 11.1 6.116 6.623 8.2 / 342 17.1 46 .85
23 18 17 30.70 +26 18.8 6.113 6.628 8.1 / 341 17.1 48 .77
24 18 17 30.51 +26 26.5 6.112 6.633 8.1 / 340 17.1 52 .69
25 18 17 30.30 +26 34.1 6.110 6.638 8.1 / 339 17.2 57 .60
26 18 17 30.09 +26 41.7 6.108 6.644 8.0 / 338 17.2 64 .51
27 18 17 29.87 +26 49.1 6.107 6.649 8.0 / 337 17.2 72 .41
28 18 17 29.63 +26 56.5 6.105 6.654 8.0 / 336 17.2 80 .32
29 18 17 29.39 +27 03.8 6.104 6.659 7.9 / 335 17.2 89 .23
30 18 17 29.14 +27 11.0 6.103 6.664 7.9 / 334 17.2 98 .14
May 1 18 17 28.88 +27 18.1 6.103 6.669 7.9 / 333 17.2 107 .08
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C/1999 F2 (Dalcanton)
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.99369 TT Nakano
q 4.7188071 (2000.0) P Q
z +0.0002957 Peri. 352.39412 -0.89276329 +0.16227606
+/-0.0000046 Node 210.29607 -0.35691365 -0.82403096
e 0.9986044 Incl. 56.42123 -0.27492972 +0.54280702
From 77 observations 1998 June 18-1999 Oct. 9, mean residual 0".68.
NAKANO
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C/1999 F2
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.99054 TT Nakano
q 4.7187924 (2000.0) P Q
z +0.0002996 Peri. 352.39370 -0.89276394 +0.16226902
+/-0.0000053 Node 210.29612 -0.35690851 -0.82403241
e 0.9985862 Incl. 56.42137 -0.27493431 +0.54280693
From 52 observations 1998 June 18-1999 June 14, mean residual 0".70.
◎C/1999 F2の軌道と予報位置です
ダイニックの杉江淳氏と久万の中村彰正氏によって観測されました．両氏とも
こんな立派な彗星がなぜ今まで発見されなかったのか，ということです．
C/1999 F2
Epoch 1998 Aug. 15.0 TT = JDT 2451040.5
T 1998 Aug. 23.99148 TT Nakano
q 4.7187895 (2000.0) P Q
z +0.0003011 Peri. 352.39382 -0.89276357 +0.16227082
+/-0.0000061 Node 210.29612 -0.35691029 -0.82403152
e 0.9985791 Incl. 56.42139 -0.27493317 +0.54280774
From 32 observations 1998 June 18-1999 June 9, mean residual 0".72.
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戻ります。