This means any satellite components that survived the fiery plunge would have splashed into the ocean, avoiding populated areas.
Officials said Rosat re-entered the atmosphere at 0150 GMT on Sunday.
Experts had calculated that up to 1.6 tonnes of wreckage could have ridden out the destructive forces of re-entry.
This amounts to roughly half the spacecraft's initial mass.
Any Rosat wreckage had been strongly tipped to hit the ocean, given that so much of the Earth's surface is covered by water.
But two Chinese cities with millions of residents each, Chongqing and Chengdu, lay further north-east along the satellite's projected path, according to Jonathan McDowell of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts.