Originally Posted by Werfer

The problem NASA is having in regards to an agreed upon solution is that around the end of December they noticed this asteroid had a strange tumbling rotation. The orbit they originally defined was symmetrical. Further study indicated that the orbit is irregular. From October to December a series of irregular jogs in the orbit were observed.

With each jog the solution has to be rerun. The composition of the asteroid is believed to be dense rock or iron. The multiple spin axis, density and irregular shape of this asteroid couple with no prior observation and lack of time is causing havoc with NASA’s ability to accurately predict the outcome.