Proposals for the masses of the three largest asteroids, the MoonEarth mass ratio and the Astronomical Unit
Abstract
We propose to the NSFA (the IAU Working Group on Numerical Standards for Fundamental Astronomy) the following representative values and realistic uncertainties for the masses of the three largest asteroids (Ceres, Pallas, Vesta), to be used as the current best estimates: begin{array}{ll}M_Ceres/M_odot = 4.72(3)\cdot 10^{10},\ M_Pallas/M_odot = 1.03(3)\cdot 10^{10},\ M_Vesta/M_odot = 1.35(3)\cdot 10^{10}. Unlike the values previously adopted in the Astronomical Almanac, these are consistent with nearly all of the twenty or so modern accurate determinations from various authors. We also have proposed the following values for the MoonEarth mass ratio and the astronomical unit in meters obtained from the ephemeris improvement processes at JPL in Pasadena and at IAA RAS in St.Petersburg: M _{Moon}/ M _{Earth} = 0.0123000371(4) and AU = 149597870700(3) m. The numerical value of the AU in meters is identical in both the TDBbased and the TCBbased systems of units if one uses the conversion proposed by Irwin and Fukushima, Brumberg and Groten, Brumberg and Simon.
 Publication:

Celestial Mechanics and Dynamical Astronomy
 Pub Date:
 April 2009
 DOI:
 10.1007/s1056900992038
 Bibcode:
 2009CeMDA.103..365P
 Keywords:

 Ceres mass;
 DE ephemerides;
 EPM ephemerides;
 Pallas mass;
 Vesta mass;
 MoonEarth mass ratio;
 Astronomical Unit