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Mapping Coordinate System Irregularities On The Celestial Sphere

Published online by Cambridge University Press:  03 August 2017

Paul D. Hemenway ,
Arthur L. Whipple  and
Raynor L. Duncombe
Paul D. Hemenway
Affiliation:
Astronomy Department and Center for Space Research, The University of Texas at Austin, Austin, Texas 78712
Arthur L. Whipple
Affiliation:
Astronomy Department and Center for Space Research, The University of Texas at Austin, Austin, Texas 78712
Raynor L. Duncombe
Affiliation:
Department of Aerospace Engineering and Center for Space Research, The University of Texas at Austin, Austin, Texas 78712

Abstract

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Various techniques have been used to evaluate and describe coordinate system irregularities. The basic techniques have developed from simple differences to differences in coordinate “bins” to full spherical and cylindrical harmonic treatments. We are undertaking a 15-year program of minor planet observation with the express purpose of finding basic parameters of the adopted fundamental system with respect to a dynamical reference frame. The program is expected to provide a few hundred observations per year of 34 minor planets selected for their distribution of physical and orbital characteristics. The ability of the program to contribute to our knowledge of the rotation of the fundamental system and systematic irregularities within the system will depend on the accuracies of the observations and the distribution of the observations over the orbits and over the celestial sphere. We are considering the use of splines as a method of evaluating systematic corrections to the extant fundamental system. The initial development of the formalism and prospects for evaluation are presented.

Type
Part II: Current Research
Information
Symposium - International Astronomical Union , Volume 133: Mapping the Sky: Past Heritage and Future Directions , 1988 , pp. 159 - 164
Copyright
Copyright © Kluwer 1988 

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