The INPOP10a planetary ephemeris and its applications in fundamental physics

TL;DR

The INPOP10a planetary ephemeris offers improved planetary and lunar position data, refined parameter estimations, and applications in fundamental physics, enhancing the accuracy of solar system modeling and gravitational tests.

Contribution

This paper introduces the INPOP10a ephemeris with improved fitting processes, updated data sets, and new parameter estimations compared to previous versions.

Findings

Enhanced planetary and lunar ephemerides accuracy

Refined estimates of PPN parameters and Sun J2

Updated asteroid mass and orbital parameters

Abstract

Compared to the previous INPOP versions, the INPOP10a planetary and lunar ephemeris has several improvements. For the planets of our solar system, no big change was brought in the dynamics but improvements were implemented in the fitting process, the data sets used in the fit and in the selection of fitted parameters. We report here the main characteristics of the planetary part of INPOP10a like the fit of the product of the Solar mass with the gravitational constant (GM$_{\odot}$) instead of the astronomical unit. Determinations of PPN parameters as well as adjustments of the Sun J2 and of asteroid masses are also presented. New advances of nodes and perihelia of planets were also estimated and are given here. As for INPOP08, INPOP10a provides to the user, positions and velocities of the planets, the moon, the rotation angles of the Earth and the Moon as well as TT-TDB chebychev polynomials at http://www.imcce.fr/inpop