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Flyby Characterization of Lower-Degree Spherical Harmonics Around Small BodiesInterest in studying small bodies has grown significantly in the last two decades, and there are a number of past, present, and future missions. These small body missions challenge navigators with significantly different kinds of problems than the planets and moons do. The small bodies' shape is often irregular and their gravitational field significantly weak, which make the designing of a stable orbit a complex dynamical problem. In the initial phase of spacecraft rendezvous with a small body, the determination of the gravitational parameter and lower-degree spherical harmonics are of crucial importance for safe navigation purposes. This motivates studying how well one can determine the total mass and lower-degree spherical harmonics in a relatively short time in the initial phase of the spacecraft rendezvous via flybys. A quick turnaround for the gravity data is of high value since it will facilitate the subsequent mission design of the main scientific observation campaign. We will present how one can approach the problem to determine a desirable flyby geometry for a general small body. We will work in the non-dimensional formulation since it will generalize our results across different size/mass bodies and the rotation rate for a specific combination of gravitational coefficients.
Document ID
20160008255
Document Type
Conference Paper
External Source(s)
Authors
Takahashi, Yu (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Broschart, Stephen (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lantoine, Gregory (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
July 1, 2016
Publication Date
August 5, 2014
Subject Category
General
Meeting Information
AIAA Space 2014 Conference and Exposition(San Diego, CA)
Distribution Limits
Public
Copyright
Other