Volume 416, Number 1, March II 2004
|Page(s)||367 - 373|
|Section||Celestial mechanics and astrometry|
|Published online||26 February 2004|
Photocentre offset in ultraprecise astrometry: Implications for barycentre determination and asteroid modelling
Rolf Nevanlinna Institute, University of Helsinki, PO Box 4, 00014 Helsinki, Finland
2 Observatory, University of Helsinki, PO Box 14, 00014 Helsinki, Finland
3 Observatoire de la Côte d'Azur, Laboratoire Cassini UMR 6529/CNRS, BP 4229, 06304 Nice Cedex 04, France
Corresponding author: M. Kaasalainen, Mikko.Kaasalainen@rni.helsinki.fi
Accepted: 1 December 2003
We investigate the magnitude and characteristics of the photocentre offset phenomenon of small solar system bodies, and compare different scenarios for correcting for it. We discuss the corresponding implications and limitations to the inverse problem of model construction based on astrometry with instruments such as GAIA.
Key words: solar system: minor planets, asteroids / astrometry / celestial mechanics / methods: numerical, observational / instrumentation: GAIA
© ESO, 2004
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