◎P/LINEAR (2004 X1 = 2009 MB9)の軌道と予報位置
マックノートは，サイデング・スプリングで2009年６月29日に発見した2009 MB9を
８月２日と３日に観測したところこの天体には約20"のコマがあって，CCD全光度が
17.3等であることを観測しました．東京のHidetaka Sato氏は，この天体が今年９月
に回帰予定のLINEAR周期彗星（2004 X1）であることを指摘しました．サイデング・
スプリングでの発見位置は，予報軌道（NK 1251(= HICQ 2008/2009)）から赤経方向
に+1o.94，赤緯方向に-2o.72のずれがあり，近日点通過時刻への補正値にして，儺=
-2.20日でした．なお，彗星は，８月下旬から観測可能となります．
P/LINEAR (2004 X1 = 2009 MB9)
Epoch 2009 Sept. 6.0 TT = JDT 2455080.5
T 2009 Sept. 1.09935 TT Nakano
q 0.7801999 (2000.0) P Q
n 0.20393034 Peri. 345.43476 +0.99144309 +0.13006508
a 2.8585655 Node 7.11985 -0.10898938 +0.87164879
e 0.7270660 Incl. 5.14782 -0.07184648 +0.47255843
P 4.83
From 138 observations 2004-2009, mean residual 0".62.
the delta-T correction for the prediction in NK 1251 was -2.20 days.
Residuals in seconds of arc
2004/ 041212 104 0.1- 0.5+ 090630 E12 0.2- 0.2+
041207 704 (3.1+ 1.1-) 041213 246 0.2+ 0.6+ 090630 E12 0.0 0.1+
041207 704 (0.3+ 2.8-) 041213 246 0.1+ 0.2+ 090630 E12 0.2- 0.2+
041207 704 1.8+ 0.5+ 041213 246 0.3+ 0.3+ 090630 E12 0.0 0.2+
041207 704 (1.5+ 2.6+) 041213 246 0.1+ 1.0+ 090630 D90 0.1- 0.3+
041209 703 1.2+ 0.1- 041213 246 0.3- 0.3+ 090701 E12 0.3- 0.3+
041209 703 0.5+ 0.0 041213 246 1.0+ 0.2+ 090704 568 0.2+ 0.2+
041209 703 0.2- 0.4- 041214 215 0.5- 0.3- 090704 568 0.1+ 0.2+
041209 703 1.4- 1.5- 041215 246 1.1- 0.4+ 090704 568 0.1+ 0.2+
041209 246 0.7+ 0.2+ 041215 246 0.5- 0.3+ 090705 568 0.0 0.2+
041209 246 0.9- 0.7- 041215 246 0.1+ 1.0+ 090705 568 0.1+ 0.2+
041209 246 0.1- 0.8+ 041215 246 1.1- 0.4+ 090705 568 0.0 0.2+
041209 246 0.8- 0.1+ 041215 246 0.7- 0.8+ 090705 E12 0.2- 0.1+
041209 246 0.8- 0.3- 041215 246 0.1- 0.1+ 090707 E12 0.0 0.1+
041209 246 1.4- 0.3- 041215 246 0.2- 0.1+ 090707 E12 1.8+ 1.0-
041209 246 0.7- 0.3- 041215 246 0.7- 0.0 090707 E12 1.4+ 0.9-
041209 246 0.9- 0.1- 041219 J95 0.9+ 0.4+ 090707 E12 0.9- 0.5+
041210 704 (2.4+ 1.7+) 041219 J95 (2.5+ 1.2-) 090707 E12 0.4- 0.5+
041210 704 1.3+ 1.4+ 041222 213 0.4- 0.2+ 090707 E12 0.1+ 0.6+
041210 704 1.0+ 1.6+ 041222 213 0.9- 0.2+ 090708 I19 0.2- 0.3-
041210 448 0.1+ 0.3- 041222 213 0.6- 0.1+ 090708 I19 0.2- 0.4+
041210 448 0.1+ 0.4- 041227 213 (2.3+ 0.5-) 090708 I19 0.1- 0.2-
041210 704 0.6+ 1.1+ 041227 213 1.9+ 0.5- 090708 E12 0.3- 0.2-
041210 448 0.0 0.4- 041230 349 (2.2+ 0.4+) 090708 E12 0.2- 0.1-
041210 704 0.2- 0.3+ 041230 349 0.1+ 0.0 090708 808 (2.8+ 0.8-)
041211 246 0.0 0.3- 041230 349 0.1- 0.4+ 090709 808 1.3+ 0.1+
041211 246 0.2+ 1.1- 041231 104 1.7+ 1.4+ 090709 808 (3.8- 1.1+)
041211 246 0.2+ 0.8- 041231 104 0.9+ 0.1+ 090709 I20 0.3+ 0.3-
041211 246 0.8- 0.3- 041231 104 1.4+ 1.8- 090709 I20 0.0 0.3-
041211 130 0.5+ 0.2- 2005/ 090709 I20 0.3- 0.3-
041211 599 0.5+ 0.0 050101 J87 0.3+ 0.7- 090711 I19 0.2+ 0.4+
041211 599 0.6- 0.8- 050101 J87 0.1- 0.5+ 090711 I19 0.2- 0.4-
041211 599 1.3+ 1.2+ 050101 J87 0.6+ 0.1- 090711 I19 0.5- 0.0
041211 599 0.2- 0.1- 050107 704 (2.1- 1.3+) 090711 I36 0.2- 0.1-
041212 704 0.8+ 1.1+ 050107 704 (1.3+ 2.4+) 090711 I36 0.0 0.2-
041212 704 0.5+ 1.4- 050107 704 0.9- 0.4+ 090711 I36 0.1- 0.1+
041212 704 0.0 0.4+ 050107 704 0.7- 1.0- 090711 E12 0.2- 0.1-
041212 704 0.8- 0.1+ 050109 213 0.5+ 0.9- 090713 I36 0.1+ 0.3+
041212 704 (3.7+ 0.3+) 050109 213 0.3+ 0.9- 090713 I36 0.1+ 0.2+
041212 704 0.7+ 0.3+ 050109 213 0.2- 0.3- 090713 I36 0.0 0.3+
041212 704 0.2- 0.7- 050111 118 0.7+ 0.0 090717 I20 0.0 0.1-
041212 704 0.6- 0.3- 050111 118 0.1- 0.2- 090717 I20 0.1- 0.0
041212 246 0.7- 1.6+ 050111 118 0.4+ 0.4- 090717 I20 0.2- 0.1-
041212 246 0.7- 0.6- 050206 118 1.2- 0.5- 090717 E12 0.0 0.2-
041212 246 0.9- 0.1+ 050206 118 1.6- 1.0- 090717 E12 0.1- 0.0
041212 246 0.6- 0.0 2009/ 090720 E12 0.2- 0.1-
041212 246 0.0 0.4+ 090629 E12 0.1- 0.9+ 090724 I20 0.0 0.0
041212 246 0.7+ 0.5+ 090629 E12 0.0 0.3+ 090724 I20 0.0 0.3-
041212 104 0.3- 0.2- 090629 E12 0.0 0.0 090724 I20 0.4- 0.8-
041212 104 0.0 1.2- 090629 E12 0.0 0.5+ 090802 E12 0.1- 0.6-
041212 104 1.1- 0.6- 090630 E12 0.1- 0.1+ 090802 E12 0.4- 0.6-
2009/ α (2000) δ △ ｒ Daily motion Elong. Phase m1 天文薄明開始時
27h JST h m ｡ , AU AU , ｡ ｡ ｡ 等 h｡ A ｡
Aug. 20 08 49.23 +06 34.8 0.224 0.803 100.4/315 18.3 156.7 15.3 -8.5 255.6
21 08 44.48 +07 46.3 0.230 0.799 93.9/316 19.8 154.5 15.3 -5.9 256.1
22 08 40.09 +08 53.7 0.237 0.795 87.5/317 21.5 152.2 15.4 -3.3 256.6
23 08 36.03 +09 57.3 0.245 0.792 81.3/317 23.3 149.7 15.4 -0.9 257.1
24 08 32.29 +10 57.1 0.252 0.790 75.3/318 25.0 147.2 15.5 +1.4 257.5
25 08 28.88 +11 53.3 0.260 0.787 69.6/319 26.8 144.7 15.5 +3.6 258.0
26 08 25.78 +12 46.0 0.268 0.785 64.2/320 28.5 142.1 15.6 +5.8 258.4
27 08 22.97 +13 35.4 0.277 0.784 59.0/322 30.2 139.6 15.6 +7.8 258.8
28 08 20.45 +14 21.7 0.285 0.782 54.2/323 31.8 137.2 15.7 +9.7 259.2
29 08 18.20 +15 04.9 0.294 0.781 49.6/325 33.3 134.7 15.8 +11.6 259.6
30 08 16.21 +15 45.3 0.303 0.781 45.3/326 34.9 132.3 15.8 +13.3 260.0
31 08 14.47 +16 23.1 0.312 0.780 41.4/329 36.3 130.0 15.9 +15.0 260.4
Sept. 1 08 12.97 +16 58.4 0.321 0.780 37.7/331 37.7 127.7 16.0 +16.6 260.7
m1 = 19.5 + 5 log △ + 10.0 log ｒ
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P/2004 X1 (LINEAR)
Epoch 2004 Nov. 11.0 TT = JDT 2453320.5
T 2004 Nov. 1.92563 TT Nakano
q 0.7824320 (2000.0) P Q
n 0.20360501 Peri. 345.44725 +0.99151934 +0.12948082
a 2.8616097 Node 7.14113 -0.10847460 +0.87176747
e 0.7265763 Incl. 5.14153 -0.07157272 +0.47249993
P 4.84 (+/- 0.25 day)
From 86 observations 2004 Dec. 7-2005 Feb. 6, mean residual 0".71.
Residuals in seconds of arc
2004/ 041211 599 1.4+ 1.2+ 041215 246 0.1- 0.1+
041207 704 (3.1+ 1.3-) 041211 599 0.2- 0.1- 041215 246 0.2- 0.1+
041207 704 (0.3+ 3.0-) 041212 704 0.9+ 1.1+ 041215 246 0.6- 0.0
041207 704 1.8+ 0.3+ 041212 704 0.6+ 1.4- 041219 J95 0.8+ 0.4+
041207 704 (1.5+ 2.4+) 041212 704 0.1+ 0.3+ 041219 J95 (2.3+ 1.2-)
041209 703 1.3+ 0.2- 041212 704 0.7- 0.1+ 041222 213 0.7- 0.2+
041209 703 0.6+ 0.1- 041212 704 (3.8+ 0.2+) 041222 213 1.1- 0.3+
041209 703 0.1- 0.5- 041212 704 0.8+ 0.2+ 041222 213 0.9- 0.1+
041209 703 1.3- 1.7- 041212 704 0.2- 0.8- 041227 213 1.9+ 0.5-
041209 246 0.8+ 0.0 041212 704 0.5- 0.3- 041227 213 1.5+ 0.5-
041209 246 0.8- 0.8- 041212 246 0.6- 1.6+ 041230 349 1.8+ 0.5+
041209 246 0.0 0.6+ 041212 246 0.6- 0.7- 041230 349 0.3- 0.1+
041209 246 0.7- 0.0 041212 246 0.8- 0.1+ 041230 349 0.6- 0.5+
041209 246 0.7- 0.4- 041212 246 0.6- 0.1- 041231 104 1.2+ 1.5+
041209 246 1.3- 0.4- 041212 246 0.1+ 0.4+ 041231 104 0.4+ 0.2+
041209 246 0.6- 0.4- 041212 246 0.8+ 0.5+ 041231 104 1.0+ 1.7-
041209 246 0.8- 0.2- 041212 104 0.2- 0.3- 2005/
041210 704 (2.4+ 1.6+) 041212 104 0.0 1.2- 050101 J87 0.2- 0.7-
041210 704 1.4+ 1.3+ 041212 104 1.0- 0.6- 050101 J87 0.6- 0.5+
041210 704 1.1+ 1.5+ 041212 104 0.0 0.4+ 050101 J87 0.1+ 0.0
041210 448 0.2+ 0.4- 041213 246 0.3+ 0.6+ 050107 704 (2.5- 1.4+)
041210 448 0.2+ 0.5- 041213 246 0.1+ 0.1+ 050107 704 (0.9+ 2.6+)
041210 704 0.6+ 1.0+ 041213 246 0.3+ 0.3+ 050107 704 1.4- 0.6+
041210 448 0.0 0.5- 041213 246 0.1+ 1.0+ 050107 704 1.2- 0.9-
041210 704 0.1- 0.2+ 041213 246 0.3- 0.3+ 050109 213 0.1+ 0.7-
041211 246 0.1+ 0.4- 041213 246 1.1+ 0.2+ 050109 213 0.1- 0.6-
041211 246 0.3+ 1.1- 041214 215 0.4- 0.3- 050109 213 0.6- 0.0
041211 246 0.3+ 0.9- 041215 246 1.1- 0.4+ 050111 118 0.3+ 0.3+
041211 246 0.7- 0.4- 041215 246 0.4- 0.3+ 050111 118 0.4- 0.1+
041211 130 0.6+ 0.2- 041215 246 0.1+ 1.0+ 050111 118 0.0 0.1-
041211 599 0.6+ 0.1- 041215 246 1.1- 0.4+ 050206 118 0.4+ 0.2+
041211 599 0.5- 0.8- 041215 246 0.7- 0.8+ 050206 118 0.0 0.3-
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P/2004 X1 (LINEAR)
Epoch 2004 Nov. 11.0 TT = JDT 2453320.5
T 2004 Nov. 1.92561 TT Nakano
q 0.7824319 (2000.0) P Q
n 0.20360616 Peri. 345.44713 +0.99151929 +0.12948120
a 2.8615989 Node 7.14123 -0.10847486 +0.87176743
e 0.7265753 Incl. 5.14153 -0.07157305 +0.47249991
P 4.84 (+/- 0.30 day)
From 85 observations 2004 Dec. 7-2005 Feb. 6, mean residual 0".72.
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P/2004 X1 (LINEAR)
T 2004 Nov. 1.94248 TT Nakano
q 0.7825121 (2000.0) P Q
n 0.20290581 Peri. 345.47877 +0.99154762 +0.12926641
a 2.8681800 Node 7.12194 -0.10829721 +0.87177776
e 0.7271747 Incl. 5.14272 -0.07144945 +0.47253966
P 4.86 (+/- 0.92 day)
From 84 observations 2004 Dec. 7-2005 Jan. 11.
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If the pre-discovery observations in 1994 October are included, T will be
2012 Dec. 7.46 TT.
P/1994 X1 (McNaught-Russell)
Epoch 2012 Dec. 19.0 TT = JDT 2456280.5
T 2012 Dec. 4.56556 TT Nakano
q 1.2799186 (2000.0) P Q
n 0.05399530 Peri. 171.19320 +0.86099639 -0.41122399
a 6.9326419 Node 218.01163 +0.43202164 +0.90185569
e 0.8153779 Incl. 29.07908 +0.26840736 -0.13248074
P 18.25 (+/- 0.16 day)
From 126 observations 1994 Dec. 12-1995 Apr. 17, mean residual 0".73.
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P/2004 X1 (LINEAR)
T 2004 Nov. 1.97188 TT Nakano
q 0.7826525 (2000.0) P Q
n 0.20169041 Peri. 345.53309 +0.99159696 +0.12889136
a 2.8796909 Node 7.08920 -0.10798619 +0.87179516
e 0.7282165 Incl. 5.14488 -0.07123516 +0.47261001
P 4.89 (+/- 3.41 day)
From 71 observations 2004 Dec. 7-31.
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◎P/2004 X1の軌道と予報位置です
ＣＭＥＳに山本速報No.2452にあるとおり，周期が約５年足らずの
新周期彗星でした．
P/2004 X1 (LINEAR)
T 2004 Nov. 1.97188 TT Nakano
q 0.7826525 (2000.0) P Q
n 0.20169041 Peri. 345.53309 +0.99159696 +0.12889136
a 2.8796909 Node 7.08920 -0.10798619 +0.87179516
e 0.7282165 Incl. 5.14488 -0.07123516 +0.47261001
P 4.89 (+/- 3.41 day)
From 71 observations 2004 Dec. 7-31.
Date/ TT R.A.(2000) Decl. Delta r Daily motion Mag. Moon Age
h h m ｡ , , / PA ｡ m1 ｡
2005 Jan. 1 12 01 03.45 +17 46.4 0.572 1.222 90.2 / 69 17.7 142 .72
2 12 01 09.35 +18 18.7 0.582 1.232 87.7 / 69 17.7 152 .62
3 12 01 15.12 +18 49.4 0.594 1.243 85.2 / 70 17.8 162 .52
4 12 01 20.77 +19 18.6 0.605 1.254 82.9 / 70 17.9 169 .42
5 12 01 26.29 +19 46.4 0.617 1.264 80.6 / 71 18.0 167 .32
6 12 01 31.69 +20 12.8 0.629 1.275 78.4 / 71 18.0 157 .22
7 12 01 36.98 +20 37.9 0.642 1.286 76.2 / 72 18.1 145 .13
8 12 01 42.14 +21 01.7 0.654 1.297 74.2 / 72 18.2 132 .06
9 12 01 47.19 +21 24.4 0.667 1.307 72.2 / 72 18.3 118 .02
10 12 01 52.13 +21 45.9 0.680 1.318 70.3 / 73 18.4 104 .00
11 12 01 56.97 +22 06.4 0.694 1.329 68.5 / 73 18.4 90 .02
12 12 02 01.70 +22 25.8 0.707 1.340 66.7 / 74 18.5 76 .06
13 12 02 06.33 +22 44.2 0.721 1.350 65.0 / 74 18.6 63 .13
14 12 02 10.86 +23 01.8 0.735 1.361 63.4 / 75 18.7 50 .22
15 12 02 15.30 +23 18.4 0.750 1.372 61.9 / 75 18.7 37 .31
16 12 02 19.65 +23 34.3 0.764 1.383 60.4 / 75 18.8 25 .42
17 12 02 23.90 +23 49.3 0.779 1.394 59.0 / 76 18.9 15 .52
18 12 02 28.08 +24 03.6 0.794 1.404 57.6 / 76 19.0 8 .62
19 12 02 32.17 +24 17.3 0.809 1.415 56.3 / 77 19.0 13 .71
20 12 02 36.18 +24 30.2 0.825 1.426 55.0 / 77 19.1 23 .80
21 12 02 40.11 +24 42.5 0.840 1.437 53.8 / 77 19.2 34 .87
22 12 02 43.97 +24 54.2 0.856 1.447 52.7 / 78 19.3 44 .92
23 12 02 47.76 +25 05.4 0.872 1.458 51.6 / 78 19.3 55 .96
24 12 02 51.48 +25 16.0 0.888 1.469 50.5 / 78 19.4 66 .99
25 12 02 55.13 +25 26.1 0.904 1.479 49.5 / 79 19.5 77 1.00
26 12 02 58.72 +25 35.7 0.920 1.490 48.6 / 79 19.6 88 .99
27 12 03 02.24 +25 44.8 0.937 1.501 47.6 / 79 19.6 99 .96
28 12 03 05.71 +25 53.5 0.953 1.511 46.8 / 80 19.7 110 .91
29 12 03 09.12 +26 01.8 0.970 1.522 45.9 / 80 19.8 122 .85
30 12 03 12.48 +26 09.8 0.987 1.533 45.1 / 80 19.8 133 .78
31 12 03 15.79 +26 17.3 1.004 1.543 44.3 / 80 19.9 145 .69
Feb. 1 12 03 19.04 +26 24.5 1.021 1.554 43.6 / 81 20.0 157 .59
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戻ります。