This paper presents an overview of the orbit determination for Galileo's epochal encounter with the asteroid Gaspra on October 29, 1991. Topics discussed are a ground-based observation campaign to improve Gaspra's ephemeris before encounter, and the use of optical navigation together with Doppler and range data. The paper concludes by noting the steady improvement in the B-plane dispersions during the two months prior to encounter.
Galileo orbit determination for the Gaspra asteroid encounter
1992 AIAA/AAS Astrodynamics Conference ; 1992 ; Hilton Head Island, SC, United States
1992-01-01
Conference paper
No indication
English
Optical navigation for the Galileo Gaspra encounter
NTRS | 1992
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