Thanks for providing some calculations. I looked up the maths of collapsing stars, and naturally things are massively more complicated than the stuff you present. That's not why I thought I'd post though. I'm trying to figure out your figures. The figure that struck me was the mass: roughly 1.5 x 10^
121 kg, I've seen one calculation for the mass of the solar system as being 210
30 kg , which is a long way off the mass you chose. It did seem like your final forces involved where a little large.
Here is a page with some more involved
mathematics on it.
Still, its good to see something substansive finally get onto the thread. Hopefully it'll serve as a spring board for further discussion - I was kind of hoping to see an mpeg of a collapsing star