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The Reference Frame Determined From the Observation of Minor Planets by Hipparcos

Published online by Cambridge University Press:  19 July 2016

B. Morando  and
A. Bec-Borsenberger
B. Morando
Affiliation:
Bureau des Longitudes 77, Avenue Denfert-Rochereau 75014 Saris - France
A. Bec-Borsenberger
Affiliation:
Bureau des Longitudes 77, Avenue Denfert-Rochereau 75014 Saris - France

Abstract

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The observation of minor planets by Hipparcos offers the opportunity to obtain high precision positions for some minor planets. About fifty minor planets are on the programme. Their ephemerides had to be improved in order to reach a precision of 1 arsec and occultations by the Earth and the Moon had to be predicted.

From the position of a minor planet on reference great circles at different times better values of the initial position and velocity will be deduced but the reduction of the observations of the minor planets have to take into account the displacement of the photocentre relative to the centre which is due to the shape, the phase effect and the scattering properties of the surface. For some very small planets considered as star like this diplacement will be small and the precise positions obtained will allow to position the dynamical reference system relative to the Hipparcos system. For the bigger minor planets the observations by Hipparcos may give informations on the shape and scattering properties of the surface.

Type
Part 4: Realization and comparison of reference frames
Information
Symposium - International Astronomical Union , Volume 141: Inertial Coordinate System on the Sky , 1990 , pp. 329 - 336
Copyright
Copyright © Kluwer 1990 

References

REFERENCES

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