He said not all of these pieces are traceable, but nearly 60 are big enough - about 10cm or longer - to do some serious damage to satellites, ISS.
However, Indian authorities say majority of the debris has decayed
Notably, DRDO had said at the time of the test that all debris will fall and burn in Earth's atmosphere in 45 days.
G Satheesh Reddy, the organization's chairman, backed that claim last month, noting that "most of the debris has decayed. And, whatever, couple of pieces are there, they will be decaying in a short period of time."
However, McDowell's analysis tells a different story
Going by the estimates from Indian authorities, the debris should at least be on the verge of disappearing.
However, the fact that dozens of traceable pieces still exist in the orbit shows a different story.
Considering the current altitude of remaining pieces, McDowell predicts they would take about a year or so to re-enter and burn up in Earth's atmosphere.