How long is the fragment train?
The angular length of the train was about 51 arcseconds in March 1993 [2]. The length of the train then was about one half the Earth-Moon distance. In the day just prior to impact, the fragment train will stretch across 20 arcminutes of the sky, more that half the Moon’s angular diameter. This translates to a physical length of about 5 million kilometers. The train expands in length due to differential orbital motion between the first and last fragments.
