I can confirm this issue. Quite bizarre, but essentially what happens is that when I save 2007 OR10, the radius decreases to 600 km instead of the original 645 km and the density goes from 3.29 g/cm^3 to 4.09 g/cm^3. It doesn't seem to have a connection to actually launching a saved object. Placing it normally still has the same changes. It seems to be related to the process of saving an object that changes the parameters.
This is a screenshot showing 2007 OR10 before and after saving. Textures are randomised and are not related to the phenomenon.