CesiumJS: Hayabusa 2 location w.r.t Earth

Question

Given these coordinates w.r.t Sun:

Hayabusa:

• x = 86014493
• y = 112689997
• z = 54295960

Earth:

• x = 82241037
• y = 112748971
• z = 48876281

How do I calculate Hayabusa coordinates w.r.t Earth center?

I tried with x = earth-hayabusa and x = hayabusa-earth, but it looks like it's wrong.

---

Here follows a method to visualize results of such calculation in a 3d viewer:

I have this JSON file containing the positions of some bodies w.r.t to Sun:

http://haya2now.jp/data/data.json

For example:

"hayabusa2":{"y":112689997.8606,"x":86014493.85948,"z":54295960.1354}
"earth":{"x":82241037.03488,"z":48876281.38811,"y":112748971.4809}
"ryugu":{"z":52629024.8754,"x":95901344.47932,"y":107641387.9349}

I also have data about location and orientation of antennas pointing Hayabusa 2 spacecraft:

"hayabusa2":
    {
        "alt":56.99,
        "azm":34.06,
    },
    "latitude":31.25,
    "longitude":131.08,
    "altitude":376,
    "sun":{"azm":254.6,"alt":-12.29},
    "name":"USC34"

So I am trying to create a 3d simulator showing position of hayabusa and arrows pointing from antennas to hayabusa; but something is going wrong, because arrows are not pointing to hayabusa position:

http://win98.altervista.org/space/exploration/3d/3dtracker.html

You can add Hayabusa object by running this code from console (F12 key):

// First attempt:
x1 = 1000*(obj.geometry[0].hayabusa2.x - obj.geometry[0].earth.x);
y1 = 1000*(obj.geometry[0].hayabusa2.y - obj.geometry[0].earth.y);
z1 = 1000*(obj.geometry[0].hayabusa2.z - obj.geometry[0].earth.z);
// Second attempt:
x2 = 1000(obj.geometry[0].earth.x - obj.geometry[0].hayabusa2.x);
y2 = 1000(obj.geometry[0].earth.y - obj.geometry[0].hayabusa2.y);
z2 = 1000*(obj.geometry[0].earth.z - obj.geometry[0].hayabusa2.z);
hayapos = new Cesium.Cartesian3(x1,y1,z1);
hayapos2 = new Cesium.Cartesian3(x2,y2,z2);
haya = {label: {  text: "Hayabusa 2",font: "24px Helvetica"} , description : "Descrizione", position: hayapos, point : {color: Cesium.Color.LIME, pixelSize:100},
  box: {
    dimensions: new Cesium.Cartesian3(400000.0, 300000.0, 500000.0),
    material: Cesium.Color.RED.withAlpha(0.5),
    outline: true,
    outlineColor: Cesium.Color.BLACK,
  }
};
haya2 = {label: {  text: "Hayabusa 2xxxxxx",font: "24px Helvetica"} , description : "Descrizione", position: hayapos2, point : {color: Cesium.Color.LIME, pixelSize:100},
  box: {
    dimensions: new Cesium.Cartesian3(400000.0, 300000.0, 500000.0),
    material: Cesium.Color.RED.withAlpha(0.5),
    outline: true,
    outlineColor: Cesium.Color.BLACK,
  }
};
hayaEntity = viewer.entities.add(haya);
hayaEntity2 = viewer.entities.add(haya2);
hayaEntity.name = "Hayabusa 2";
hayaEntity2.name = "Hayabusa 2aaaaaa";

Then use one of these lines to move camera to hayabusa:

viewer.camera.flyTo({destination:hayapos, complete: function () {viewer.camera.moveBackward(1000); viewer.camera.moveUp(100)}});
viewer.camera.flyTo({destination:hayapos2, complete: function () {viewer.camera.moveBackward(1000); viewer.camera.moveUp(100)}});

Note that Cesium uses meters as unit of measure.

I am trying with:

x1 = hayabusa2.x  - earth.x

and

x1 = earth.x - hayabusa2.x