Tiangong-2 will be deorbited July 19 2019. This means destruction of POLAR

According to the plan, the Tiangong-2 Space Laboratory has completed all the expansion tests and will opportunistic deorbit and reentry the atmosphere on Beijing time July 19, 2019. A small amount of residual load will fall into the scheduled safe waters of the south Pacific Ocean (160 to 90 degrees West, 30 to 45 degrees South).