Dark round object with long trail of sparks following it seemed to slowly float just above our home.

Round dark object traveling slowly from north-northwest to south-southeast. Sparks and what looked like debri were falling from object leaving a long trail to the sides and behind object.  The object, when right above us, was about half the size of our lot which is 50 feet wide.  Although it looked as though it was not very high up, we could not tell how high it was.  As it passed beyond our house towards the city (7 miles away), it looked as though it would crash downtown.  Later we heard on the radio that it had crashed on the Chapman Ranch about 150 miles or so from San Antonio.  The next morning the news reported that it was thought to be a piece of a Russian satellite and that a scientific team from Trinity University (San Antonio, Tx) was being sent to investigate. We made several calls to authorities and the airport but no one had seen anything.  What was so strange is that no one that we asked had seen anything either. There was never anything else mentioned in the news about it. It was such a large object that it would be impossible to miss seeing it. We thought even if it was just a Russian satellite, it should have been a huge news story.  My husband and I were professionals working in the computer industry when this occurred.