# Converting Earth Moon Barycenter coordinate to Geocentric coordinate

I have Earth Moon Barycenter coordinate (J2000) generated from VSOP2013 in Astronomical Units,

JD=2415020.5
X=-0.1968857640    Y=0.9633224602     Z=0.0002147057    AU
X'=-0.0171376156   Y'=-0.0035078892   Z'=-0.0000011481  AU/day


How to convert it to Geocentric?

• Find the coordinates for the Earth's barycenter and subtract. Note the Earth-Moon barycenter actually lies about 1000 miles below the Earth's surface, since the Earth is about 81 times more massive than the Moon. – user21 Jul 27 '17 at 14:32