After refining the radar data, the analysts determined that a slow-moving object, about the size of a laptop computer, gradually drifted away from the shuttle. Its slow motion implied that it was probably not a piece of space junk or a meteor. Further tests showed that the radar properties of the object were a close match for a piece of RCC panel—possibly part of the wing’s leading edge. It appeared to separate from the shuttle after several thruster firings that changed Columbia’s orbital orientation.
