re: that much movement in 10 years ..
Well, there's enough data to work it out. We know how far away Sagittarius A (the galactic centre) is. There's a scalebar for angular distance. The rest is simple trigonometry in the limit of small angles.
No time to work it out now but here's a teaser for you - what are the tidal forces like for one of those bodies in a highly elliptical orbit? It would make Niven's "Neutron Star" look feeble!