How to get an object to orbit a moving object without falling out of orbit

Hello Unity friends, I am trying to figure out how to get an object to orbit another object without falling out of the general orbit radius. I want to use rigidbody physics and I don't want to increase the velocity in order to have it keep up because it will orbit too fast. Does anyone have an idea how this could be accomplished?

This is the code I am using to orbit the object. It works fine on stationary objects but once I add torque to the parent object things start to break down.

Quaternion q = Quaternion.AngleAxis (stats.orbitSpeed * Time.deltaTime, transform.forward);
rb.MovePosition (q * (rb.transform.position - target.position) + target.position);

Here is a video of what is going on.

This is how I want it to orbit around the moving object. In this video the parent is stationary.

Thank you, and also Happy New Years everyone!

 

If you want orbiting object, simply make gravity, always pointing at planet from object, and then jus apply one of velocity, or just apply force. Rest physics will do Jo for you.

 

That would work however, for the purposes of my game using real gravity ended up causing a lot of problems so I have had to use faux solutions to get it to work. I actually just went back to not using any rigid body movement and I was able to get the result I was looking for. Thank you for your reply though!

 

How do I make gravity always pointing at planet from object? Thanks

 

what did you use instead of the Rigidbody?

 

Just calculate vector direction, between object and planet. Then apply gravity force.

 

I tried this and obviously ended up with objects just falling on the surface of the planet instead of orbiting it

 

If you are using an orbit script such as Brackeys one, you will need to have a velocity high enough for it to swing around the parent