orbit integrator


<?xml version="1.0" encoding="UTF-8"?>
<system>

<all>
<description>orbit precession in the (x=-1.98) field (almost keplerian)</description>
<exponent>-1.98</exponent>
</all>

<body>
<type>virtual</type>
<name>centre</name>
<mass>1</mass>
</body>

<body>
<pX>1</pX>
<vY>0.7</vY>
<color>pink</color>
</body>

</system>