Fig. 15From: Inflight calibration of the optical navigation camera for the extended mission phase of Hayabusa2Required exposure times for observing the return capsule with a S/N ratio of 10 as a function of observation distance. A gray line indicates the maximum exposure time of ONC-W2 (44Â s), and the orange colored region indicates conditions in which ONC-W2 is capable of observing the capsuleBack to article page