A simulation experiment on the GM estimation for Comet 133P/Elst-Pizarro

In China's asteroid mission to be launched around 2025, (7968) 133P/Elst-Pizarro (hereafter 133P) will be the second target, after a visit to asteroid (469219) Kamo'oalewa. This paper describes a simulation of precise orbit determination for the spacecraft around comet 133P, as well as est...

Full description

Saved in:
Bibliographic Details
Published in:Research in astronomy and astrophysics 2021-01, Vol.21 (1), p.16-164
Main Authors: Gao, Wu-Tong, Yan, Jian-Guo, Jin, Wei-Tong, Yang, Xuan, Yang, Chen, Ye, Mao, Li, Fei, Barriot, Jean-Pierre
Format: Article
Language:English
Subjects:
Asteroids
celestial mechanics
comets: individual (133P/Elst-Pizarro)
Earth stations
methods: statistical
Orbit determination
Parameter estimation
Radiation pressure
Simulation
Solar radiation
space vehicles
Spacecraft
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In China's asteroid mission to be launched around 2025, (7968) 133P/Elst-Pizarro (hereafter 133P) will be the second target, after a visit to asteroid (469219) Kamo'oalewa. This paper describes a simulation of precise orbit determination for the spacecraft around comet 133P, as well as estimation of its gravitational parameter (GM) value and the solar radiation pressure coefficient Cr for the spacecraft. Different cometocentric distances of 200, 150 and 100 km orbits are considered, as well as two tracking modes: exclusive two-way range-rate mode (Earth station to spacecraft) and combinations of two-way range-rate and local spacecraft onboard ranging to the comet. Compared to exclusive two-way range-rate, the introduction of local ranging observables improves the final GM uncertainties by up to one order of magnitude. An ephemeris error in the orbit of 133P is also considered, and we show that, to obtain a reliable estimate of the GM for 133P, this error cannot exceed a one km range.
ISSN:1674-4527
DOI:10.1088/1674-4527/21/1/16