Updated IAA RAS planetary ephemerides-EPM2011 and their use in scientific research

Solar System Research (Impact Factor: 0.65). 08/2013; 47(5). DOI: 10.1134/S0038094613040059
Source: arXiv


The EPM (Ephemerides of Planets and the Moon) numerical ephemerides were first created in the 1970s in support of Russian space flight missions and since then have been constantly improved at IAA RAS. In the following work, the latest version of the planetary part of the EPM2011 numerical ephemerides is presented. The EPM2011 ephemerides are computed using an updated dynamical model, new values of the parameters, and an extended observation database that contains about 680000 positional measurements of various types obtained from 1913 to 2011. The dynamical model takes into account mutual perturbations of the major planets, the Sun, the Moon, 301 massive asteroids, and 21 of the largest trans-Neptunian objects (TNOs), as well as perturbations from the other main-belt asteroids and other TNOs. The EPM ephemerides are computed by numerical integration of the equations of motion of celestial bodies in the parameterized post-Newtonian n-body metric in the BCRS coordinate system for the TDB time scale over a 400-year interval. The ephemerides were oriented to the ICRF system using 213 VLBI observations (taken from 1989 to 2010) of spacecraft near planets with background quasars, the coordinates of which are given in the ICRF system. The accuracy of the constructed ephemerides was verified by comparison with observations and the JPL independent ephemerides DE424.
The EPM ephemerides are used in astronavigation (they form the basis of the Astronomical Yearbook and are planned to be utilized in GLONASS and LUNA-RESURS programs) and various research, including the estimation of the solar oblateness, the parameters of the rotation of Mars, and the total mass of the asteroid main belt and TNOs, as well as the verification of general relativity, the secular variations of the Sun’s mass and the gravitational constant, and the limits on the dark matter density in the Solar System.
The EPM ephemerides, together with the corresponding time differences TT — TDB and the coordinates of seven additional objects (Ceres, Pallas, Vesta, Eris, Haumea, Makemake, and Sedna), are available at ftp:// quasar. ipa. nw. ru/ incoming/ EPM.

Full-text preview

Available from:
  • Source
    • "which comes from the most stringent limitation on G-dot obtained by the set of ephemerides [26] "
    [Show abstract] [Hide abstract]
    ABSTRACT: A D-dimensional gravitational model with Gauss-Bonnet term is considered. When ansatz with diagonal cosmological type metrics is adopted, we find solutions with exponential dependence of scale factors (with respect to "synchronous-like" variable) which describe an exponential expansion of "our" 3-dimensional factor-space and obey the observational constraints on the temporal variation of effective gravitational constant G. Among them there are two exact solutions in dimensions D = 22, 28 with constant G and also an infinite series of solutions in dimensions D \ge 2690 with the variation of G obeying the observational data.
    Full-text · Article · Mar 2015 · European Physical Journal C
  • Source
    • "Since the Sun is a luminous object, it is certain that M ⊙ is significant player in the time variation of µ ⊙ . According to Pitjeva and Pitjev (2012, 2013 "
    [Show abstract] [Hide abstract]
    ABSTRACT: We here apply the ASTG-model to the observed anomalous secular trend in the mean Sun-(Earth-Moon) and Earth-Moon distances. For the recession of the Earth-Moon system, in agreement with observation, we obtain a recession of about 11.20 ± 0.20 cm/yr. The ASTG-model predicts orbital drift as being a result of the orbital inclination and the Solar mass loss rate. The Newtonian gravitational constant G is assumed to be absolute time constant. Standish (2005); Krasinsky and Brumberg (2004) reported for the Earth-Moon system, an orbital recession from the Sun of about (15.00 ± 4.00) cm/yr; while Williams et al. (2004); Williams and Boggs (2009); Williams et al. (2014) report for the Moon, an orbital recession of about 38.00 mm/yr from the Earth. The predictions of the ASTG-model for the Earth-Moon system agrees very well with those the findings of Standish (2005); Krasinsky and Brumberg (2004). The lost orbital angular momen-tum for the Earth-Moon system – which we here hypothesize to be gained as spin by the two body Earth-Moon system; this lost angular momentum accounts very well for the observed lunar drift, therefore, one can safely safely say that the ASTG-model does to a reasonable degree of accuracy predict the observed lunar drift of about 38.00 mm/yr from the Earth.
    Full-text · Article · Nov 2014 · Astrophysics and Space Science
  • Source
    • "In regard to the anomalous and extra-anomalous perihelion precession, what can the ASTG-model be applied to. This question we ask after having tried (and failed) to model using the ASTG-model, the extra-anomalous perihelion precessions that have been measured by Fienga et al. (2011b); Pitjeva and Pitjev (2013). This effort we conducted as part and parcel of the package of recommendations by the anonymous reviewer. "
    [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents an improved version of the azimuthally symmetric theory of gravitation (ASTG) model, which was presented for the first time in the present journal in 2010. I propose a solution to the standing problem of the λ-parameters and, in order to do this, I put the ASTG model on a clear pedestal for falsification. As in the first paper, the perihelion precessional data of solar planetary orbits is used to set the theory into motion. It is seen that the ASGT model is able to explain the anomalous perihelion precession that is explained by the general theory of relativity (GTR) as being a result of space–time curvature. The ASTG model explains that the anomalous perihelion precession is not a result of the curvature of space–time, as is the case with the GTR, but a result of the spin of the gravitating mass about which these test bodies orbit. In this way, the ASTG model provides a plausible alternative way to interpret the observed anomalous perihelion precession of solar planetary orbits.
    Full-text · Article · Sep 2014 · Monthly Notices of the Royal Astronomical Society
Show more