It is well known that many characteristics about an asteroid such as orbit, size, rotation and chemical composition can be obtained remotely thanks to passive techniques such as spectrophotometry, radiometry, spectropolarimetry, hyperspectral imaging and thermal modeling or active techniques such as radar measurements.
For the sake of asteroid mining, we are mainly concerned about the internal composition of the asteroids and the content of valuable resources. Are there any asteroids characteristics relevant to asteroid mining that cannot be learned remotely? Said differently, will full asteroid prospecting for the sake of asteroid mining require sending robotic probes to each asteroid?
For instance, it may be expected that the internal composition is heavily correlated with the chemical composition observed in their emission spectra. Is this correct or, if unkown due to lack of datapoints, at least expected to be correct in the academic literature?