C/1999 E1 ( Li )

Japanese version
Home page
Updated on May 27, 2001

---------------------------------------------------------------------

* Profile

Discovery Date March 13, 1999
Magnitude 16.5 mag
Discoverer W.-d. Li (Lick Observatory)

* Pictures

* Orbital Elements

   The following improved orbital elements by Kenji Muraoka, are
  from 290 observations 1999 Jan. 22 to 2001 Mar. 28, perturbations
  by 9 Planets, Moon and 5 minor planets were taken into account. 
   The mean residual is +/- 0.66 arc seconds.

      Epoch  =  1999 Jan. 22.0  TT       JDT = 2451200.5
          T  =  1999 Jan. 31.70508       +/- 0.00175 (m.e.) TT
       Peri. =  329.75817                +/- 0.00018
       Node  =  127.83279                +/- 0.00020   (2000.0)
       Incl. =   46.88668                +/- 0.00012
          q  =    3.9199578              +/- 0.0001610 AU
          e  =    0.7597711              +/- 0.0000068
          a  =   16.3175939              +/- 0.0004884 AU
          n  =    0.01495271             +/- 0.00000067
          P  =   65.915                  +/- 0.0029595  years
                                        (+/- 1.08 days)

* Finding Charts

* Magnitudes Graph

        m1 = 6.5 + 5 log d + 10.0 log r

---------------------------------------------------------------------

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.

---------------------------------------------------------------------

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