Orbital animation

first of all I'll try to explain what I'm trying to do. The task looks quite simple at first look, but it took me some time to realize its very complex. What I'm trying to do is simple animation with easing at the beginning and at the end - I know how to use easing, the hard part is that I'm trying to do something like Orbit - Elliptical orbit with lets say 5 rectangles attached to it. I want to move the rectangles along the Elliptical orbit (elliptical path) without changing the rotation angle of each rectangle.

I've tried with Path animation, but it seems that motion path animations don't support easing ? Am I wrong ? Второе решение заключалось в том, чтобы сгруппировать путь и прямоугольники и повернуть всю группу, но это также изменило угол поворота прямоугольников. Is there a simple way to do this ? Please point me to an article or something, or if you have a similar scenario please share the solution. Thanks.