記事タイトル:Comet P/2002 X2 (NEAT) 

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お名前: stock market gambling    URL

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[2005年5月10日 5時13分37秒]

お名前: custom poker tables    URL

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[2005年5月8日 16時38分49秒]

お名前: 佐藤 裕久   
K. J. Lawrenceの通報によると、NEATチーム(R. Bambery、 E. Helin、 S. Pravdo、
M. Hicks と R. Thickstenを含む)によるPalomarの1.2-m Schmidt望遠鏡のCCD画像から
くじら座に全光度18.1等の彗星を発見した。
NEO Confirmation Pageに公表され、他のCCD観測者によって確認された。
12月8.8日UT、J. Ticha と M. Tichy (Klet天文台、1.06-m KLENOT望遠鏡 + CCD)の
観測では、7″のコマとP.A.45°に14″の尾が見える。
12月8.20日UT、P. R. Holvorcem(Tenagra II天文台、0.81-m f/7 Ritchey-Chretien
望遠鏡 + CCD)によると、120秒露光の3画像から、7″のコマとP.A.約55°に約14秒の尾が
見える。12月9.15日UT、F. B. Zoltowski(Tebbutt天文台、0.3-m f/3.3 Schmidt-
Cassegrain望遠鏡 + CCD)が得た画像では、拡散した15″のコマとP.A.240°に微かに尾ら
しいものが見える。

発見位置は次のとおり、

     2002 UT             R.A. (2000) Decl.        m1
     Dec.  7.17100    2 18 17.91   - 7 46 37.0   18.4

さらに発見前の観測(LONEOSによる10月5日と12月6日、NEATによる11月5日の観測)を
含んだ観測から次の楕円軌道と位置推算表が計算された。

Orbital elements:
    P/2002 X2 (NEAT)
T 2003 Mar. 29.5651 TT                                  MPC
q   2.528633             (2000.0)            P               Q
n   0.1215844      Peri.  356.0279      +0.2660195      -0.8681049
a   4.035377       Node    78.1561      +0.8958030      +0.0620486
e   0.373384       Incl.   25.3531      +0.3560487      +0.4924874
P   8.11
From 27 observations 2002 Oct. 5-Dec. 9.

Ephemeris:
    P/2002 X2 (NEAT)
Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase   m1
2002 12 02    02 21.14   -08 45.5    1.846    2.643   135.7    15.1  17.6
2002 12 12    02 16.24   -06 47.4    1.912    2.625   127.0    17.4  17.6
2002 12 22    02 13.90   -04 34.8    1.994    2.608   118.3    19.4  17.7
2003 01 01    02 14.19   -02 12.9    2.091    2.593   109.7    20.9  17.7
2003 01 11    02 17.01   +00 14.3    2.197    2.580   101.5    21.9  17.8
2003 01 21    02 22.17   +02 43.4    2.310    2.568    93.6    22.5  17.9
2003 01 31    02 29.40   +05 12.1    2.427    2.557    86.1    22.6  18.0
2003 02 10    02 38.50   +07 38.7    2.546    2.548    79.0    22.3  18.1
2003 02 20    02 49.23   +10 01.7    2.663    2.541    72.1    21.7  18.2
2003 03 02    03 01.40   +12 20.2    2.778    2.535    65.6    20.9  18.3
2003 03 12    03 14.87   +14 33.1    2.890    2.531    59.3    19.7  18.3
2003 03 22    03 29.49   +16 39.8    2.995    2.529    53.3    18.4  18.4
2003 04 01    03 45.15   +18 39.4    3.095    2.529    47.5    16.9  18.5
2003 04 11    04 01.75   +20 31.3    3.187    2.530    41.8    15.3  18.5
2003 04 21    04 19.18   +22 14.8    3.271    2.533    36.3    13.6  18.6
2003 05 01    04 37.37   +23 49.3    3.347    2.538    31.0    11.8  18.7

(IAUC 8029、MPEC 2002-X51)
[2002年12月9日 20時17分40秒]

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