C/1997 O1 ( Tilbrook )

Japanese version
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Updated on June 27, 1998

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* Profile

Discovery Date July 22, 1997
Magnitude 10 mag
Discoverer J. Tillbrook (Clare, S. Australia)

* Orbital Elements

   The following improved orbital elements by Kenji Muraoka, are 
  from 111 observations 1997 July 23 to 1998 Mar. 23, perturbations
  by 9 Planets, Moon and 5 minor planets were taken into account.
   The mean residual is +/- 0.67 arc seconds.

      Epoch  =  1997 July 11.0  TT       JDT = 2450640.5
          T  =  1997 July 13.41925       +/- 0.00021 (m.e.) TT
       Peri. =  336.18714                +/- 0.00018
       Node  =  231.24573                +/- 0.00013   (2000.0)
       Incl. =  115.80202                +/- 0.00019
          q  =    1.3718028              +/- 0.0000039 AU
          e  =    0.9842429              +/- 0.0000080
        1/a  =   +0.0114864              +/- 0.0000058 1/AU
        ( P  =    812 years )

* Finding Charts

* 1997 May 2 - 1997 Sept.19
* 1997 Aug. 10 - 1998 Dec. 23

* Magnitudes Graph

        m1 = 7.4 + 5 log d + 16.0 log r

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The orbital elements are calculated by Kenji Muraoka.
The charts are made with StellaNavigator Ver.2.0 for Windows (AstroArts / ASCII).
The magnitudes graphs are made with Comet for Windows.

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Copyright(C) Seiichi Yoshida (comet@aerith.net). All rights reserved.