How to use a better approach for this Quaternion code?

Unity Engine
1

I have a gameobject that needs to gradually rotate towards a target transform. I got it working but I wonder if this is the correct approach. It involves LookingAt the target object to capture the rotation, Then restoring the original rotation.

  Quaternion backupRotation = this.sceneCameraGO.transform.rotation; //Backup the current rotation
  this.sceneCameraGO.transform.LookAt(this.ekgSystem.transform); //Look at the target transform to capture the target rotation
   targetRotation = this.sceneCameraGO.transform.rotation; //Capture the target rotation
    this.sceneCameraGO.transform.rotation = backupRotation; //Restore the original rotation

Update()
{
  //Gradually rotate towards the target rotation
   this.sceneCameraGO.transform.rotation = Quaternion.RotateTowards(
    this.sceneCameraGO.transform.rotation, targetRotation, 20.0f * Time.deltaTime);

}

I feel like there there is a better approach. I looked through the Quaternion API and don’t see any other approach that is obvious.
Thanks

2

Nevermind, I found out to use the Quaternion.LookRotation instead

Vector3 relativePos = this.ekgSystem.transform.position - this.sceneCameraGO.transform.position;
targetRotation= Quaternion.LookRotation(relativePos);