It kinda depends on HOW you want it to orbit the node.
RotateAround will work, but it will ignore physics, and you’ll need to change the cars facing directional manually. If you’re using rigidbody for your WASD movement, maybe just stick with that.
You already have the node position, and we have the car’s position and direction. The direction from the car to the node is (node position – car position). Once you have that, you can just keep pushing the car forward however you already are, and then rotate the car like it’s trying to look at the node directly (this can also be done the same way you turn the car manually). With out knowing exactly how the movement is being handled, I can’t give you the exact functions or math you need for the rotation.
However, anyway you do it will involve just trying to get the car to look at the node, while still moving forward at the same time. If you can sync its turning speed to its forward speed, it should orbit the node in a near perfect circle.