記事タイトル:Comet P/2001 X3 (LINEAR) 

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[2005年5月10日 2時36分30秒]

お名前: 佐藤 裕久   
R. Huber(Lincoln研究所、MIT)の通報によれば、12月7日、LINEARによって発見された天体が、
12月17日に拡散していることがわかった。(LINEARによる発見前のデータが9月10日にある)
Farpoint天文台の12月19.1日UTのCCD観測では、恐らく拡散している。(R光度17.2-17.8)

発見位置は次のとおり、

     2001 UT             R.A. (2000) Decl.        m2
     Dec.  7.08304   23 18 08.17   + 5 59 14.1   19.9

軌道要素、位置推算表は次のとおり、

Orbital elements:
    P/2001 X3 (LINEAR)
Epoch 2002 Jan. 6.0 TT = JDT 2452280.5
T 2001 Dec. 30.75551 TT                                 MPC
q   1.5840558            (2000.0)            P               Q
n   0.15466172     Peri.  163.63430     +0.70839272     -0.67599018
a   3.4372740      Node   240.71075     +0.61868388     +0.73314296
e   0.5391535      Incl.   13.46067     +0.33972049     +0.07442234
P   6.37
From 25 observations 2001 Sept. 10-Dec. 19, mean residual 0".71.

Ephemeris:
    P/2001 X3 (LINEAR)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2001 12 17    23 41.29   +06 05.1    1.198    1.590    93.0    38.2  19.4
2001 12 27    00 06.26   +06 31.4    1.264    1.585    88.8    38.4  19.5
2002 01 06    00 32.39   +07 14.4    1.335    1.585    84.8    38.2  19.6
2002 01 16    00 59.35   +08 09.8    1.412    1.592    81.2    37.6  19.8
2002 01 26    01 26.84   +09 13.5    1.496    1.606    77.7    36.8  19.9
2002 02 05    01 54.61   +10 21.0    1.585    1.625    74.3    35.7  20.1
2002 02 15    02 22.48   +11 28.6    1.681    1.650    71.0    34.5  20.3
2002 02 25    02 50.29   +12 32.9    1.782    1.680    67.8    33.1  20.5
2002 03 07    03 17.91   +13 30.8    1.888    1.715    64.5    31.5  20.7
2002 03 17    03 45.24   +14 20.2    1.999    1.754    61.3    29.8  20.9
2002 03 27    04 12.18   +14 59.4    2.114    1.796    58.0    28.1  21.2
2002 04 06    04 38.63   +15 27.1    2.232    1.842    54.6    26.3  21.4
2002 04 16    05 04.53   +15 42.8    2.353    1.891    51.1    24.4  21.6
2002 04 26    05 29.81   +15 46.3    2.474    1.943    47.6    22.5  21.9

(IAUC 7778、MPEC 2001-Y15)
[2001年12月20日 1時6分29秒]

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