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(meteorobs) Excerpts from "CCNet, 11 October 1999"




------- Forwarded Message

From: Benny J Peiser <b.j.peiser@livjm.acdot uk>
To: cambridge-conference@livjm.acdot uk
Subject: CCNet, 11 October 1999
Date: Mon, 11 Oct 1999 12:07:36 -0400 (EDT)

CCNet, 11 October 1999
======================

[...]

(3) ON THE ORBITAL EVOLUTION OF NEAR-EARTH ASTEROIDS
    L. Liu*) & J. Ji, NANJING UNIVERSITY

[...]

(5) NUMERICAL STUDY OF NEA ORBITS
    L. Liu*), J.H. Ji, X.H. Liao, NANJING UNIVERSITY

[...]

=============

(3) ON THE ORBITAL EVOLUTION OF NEAR-EARTH ASTEROIDS

L. Liu*) & J. Ji: On the orbital evolution of near-Earth asteroids
CHINESE ASTRONOMY AND ASTROPHYSICS, 1999, Vol.23, No.3, pp.273-276

*) NANJING UNIVERSITY,DEPT ASTRON,NANJING 210093,PEOPLES R CHINA

The choice of dynamical model and algorithm in the calculation of the 
orbital evolution of near-earth asteroids is elucidated from a 
dynamical point of view, and illustrated with the results of 
asteroid-earth encounter over the next century for six near-earth 
asteroids. Copyright 1999, Institute for Scientific Information Inc.

=============

(5) NUMERICAL STUDY OF NEA ORBITS

L. Liu*), J.H. Ji, X.H. Liao: A numerical study of the orbits of near 
earth asteroids with symplectic algorithm. CHINESE ASTRONOMY AND 
ASTROPHYSICS, 1999, Vol.23, No.1, pp.108-119 

*) NANJING UNIVERSITY,DEPT ASTRON,NANJING 210008,PEOPLES R CHINA

We use an improved explicit symplectic algorithm and the nested 
RKF7(8) integrator to study numerically the orbital evolution in 43 
numbered near-Earth asteroids. Post-newtonian effect is included in 
the dynamical model, and we consider particularly the prospect of 
applying symplectic algorithm in the orbital study of asteroids and 
its effectiveness in case of close approach to a major planet. 
Copyright 1999, Institute for Scientific Information Inc.

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