Hi, like that (no tested):
var center = ObjectManager.Target.Position;
var distance = 3.5;
var listPos = new List<Vector3>();
for (double angle = 0; angle < System.Math.PI * 2; angle += 0.6)
{
var p = new Vector3
{
X = (float)(center.X + distance * System.Math.Cos(angle)),
Y = (float)(center.Y + distance * System.Math.Sin(angle)),
Z = center.Z
};
listPos.Add(p);
}