[GBee]

private var _elems:Array = [ваши объекты];
private var _ao:Object = {x:19, y:82}; //другой объект
private var _needs:Array = _elems.filter(radiusFilter); 
 
 
private function radiusFilter(e:Object, index:int, arr:Array):Boolean
{
   var xx:Number = e.x - _ao.x;
   var yy:Number = e.y - _ao.y;
   return Math.sqrt(xx * xx + yy * yy) <= 150;
}