12 June 1995 Characterization of irregularly shaped bodies
Author Affiliations +
The shape of asteroids can at best be described as irregular. However, for certain target opportunities, it is often that a complete characterization the shape may not be necessary for the purpose of mosaicking. In case of slow spinning objects, a simple rectangular bounding is sufficient. Eigenvectors of the scatter matrix from the boundary points of an object can be used to determine the orientation of the bounding rectangle. These eigenvectors correspond physically to the directions about which the 2D projection of the object has maximum and minimum moments of inertia. An optimal mosaic size can then be determined from the aspect ratio of the bounding rectangle, and the size of the rectangle can be used to assist us in determining the starting mosaicking time. In a simple asteroid flyby scenario which the spacecraft travels in a linear trajectory with constant speed, the apparent size of the asteroid can be parameterized in a closed form. The parameter estimation can be solved by a least- squares fit using the size information derived from images taken when the angular diameter of the asteroid is less than the camera's field of view.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David Q. Zhu, Cheng-Chih Chu, "Characterization of irregularly shaped bodies", Proc. SPIE 2466, Space Guidance, Control, and Tracking II, (12 June 1995); doi: 10.1117/12.211501; https://doi.org/10.1117/12.211501


Visual odometry with high resolution time-of-flight cameras
Proceedings of SPIE (December 24 2013)
4MOST metrology system error analysis
Proceedings of SPIE (July 10 2018)
Topographic/photometric model of small bodies
Proceedings of SPIE (June 12 1995)
Theoretical error analysis with camera parameter calibration
Proceedings of SPIE (October 25 2004)
Stereo TV Improves Manipulator Performance
Proceedings of SPIE (September 11 1989)

Back to Top