public static double getR1(){
        double delim = a1*(1-Math.pow(e1, 2));
        double delit = 1 + e1*Cos(M1);
        return delim/delit;
    }
    
    public static double getX1(){
        return getR1() * (Cos(node1) * Cos(node1 + M1) - Sin(node1) * Sin(node1 + M1)*Cos(i1));
    }

    public static double getY1(){
        return getR1() * (Sin(node1) * Cos(node1+M1) - Cos(node1) * Sin(node1+M1)*Cos(i1));
    }

    public static double getZ1(){
        return getR1() * Sin(node1 + M1) * Sin(i1);
    }
    
    public static double getR2(){
        double delim = a2*(1-Math.pow(e2, 2));
        double delit = 1 + e2*Cos(M2);
        return delim/delit;
    }
    
    public static double getX2(){
        return getR2() * Cos(M2);
    }
    
    public static double getY2(){
        return getR2() * Sin(M2);
    }
    
    public static double getZ2(){
        return 0;
    }
    
    public static double getMOID(){
        double tmp1 = Math.pow((getX1() - getX2()),2);
        double tmp2 = Math.pow((getY1() - getY2()),2);
        double tmp3 = Math.pow((getZ1() - getZ2()),2);
        return Math.sqrt(tmp1 + tmp2 + tmp3);
    }