What is the actual mass of the sample retrieved by Chang'e 5?
with an expected return to Earth around 16 December 2020. Chang'e 5 will be China's first sample return mission, aiming to return at least 2 kilograms (4.4 pounds) of lunar soil and rock samples back to the Earth
A container carrying around 4.4 lb. (2 kilograms) of lunar samples sits inside a reentry capsule attached to the orbiter.
Is the mass already known (and if it is, how), or do we have to wait for the container to land?