Proceedings of the International Astronomical Union

Contributed Papers

Gravity tests with INPOP planetary ephemerides

A. Fiengaa1a2, J. Laskara1, P. Kuchynkaa1, C. Leponcin-Lafittea3, H. Manchea1 and M. Gastineaua1

a1 Astronomie et Systèmes Dynamiques, IMCCE-CNRS UMR8028, 77 Av. Denfert-Rochereau, 75014 Paris, France

a2 Observatoire de Besançon- CNRS UMR6213, 41bis Av. de l'Observatoire, 25000 Besançon

a3 SYRTE-CNRS UMR8630, Observatoire de Paris, 77 Av. Denfert-Rochereau, France

Abstract

We present here several gravity tests made with the latest INPOP08 planetary ephemerides. We first propose two methods to estimate the PPN parameter β and its correlated value, the Sun J2, and we discuss the correlation between the Sun J2 and the mass of the asteroid ring. We estimate a possible advance in the planet perihelia. We also show that no constant acceleration larger than 1/4 of the Pioneer anomaly is compatible with the observed motion of the planets in our Solar System.

Footnotes

Note: This material is in part based upon work supported by the National Science Foundation under Grant No. 0843236. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.