Astrodynamics science about itokawa gravity and ephemeris

M. Yoshikawa, H. Ikeda, H. Yano, J. Saito, T. Kubota, T. Hashimoto, A. Fujiwara, J. Kawaguchi, T. Kominato, M. Matsuoka, K. Shirakawa, T. Ohnishi, S. Abe, T. Mukai, R. Gaskell, D. Scheeres

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)


Hayabusa was moving near Asteroid Itokawa for about three months in 2005. Using tracking and navigation data such as range, Boppler, distance from the asteroid, and optical images taken by navigation cameras, we estimated the mass of Itokawa for several orbital phases. The results are consistent in their error ranges. The estimated mass of Itokawa is 3.51 ± 0.105 (1010 kg), from which the density of Itokawa is derived as 1.9 ± 0.13 (g/cm3). This is one of the important characteristics to understand the nature of Itokawa. We are also trying to investigate the accuracy of the ephemeris of this asteroid.

Original languageEnglish
Title of host publicationCollection of Technical Papers - AIAA/AAS Astrodynamics Specialist Conference, 2006
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
Number of pages7
ISBN (Print)1563478226, 9781563478222
Publication statusPublished - 2006
Externally publishedYes
EventAIAA/AAS Astrodynamics Specialist Conference, 2006 - Keystone, CO, United States
Duration: 2006 Aug 212006 Aug 24

Publication series

NameCollection of Technical Papers - AIAA/AAS Astrodynamics Specialist Conference, 2006


ConferenceAIAA/AAS Astrodynamics Specialist Conference, 2006
Country/TerritoryUnited States
CityKeystone, CO

ASJC Scopus subject areas

  • Engineering(all)


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