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1

Although "worth mining" is subjective and unanswerable at the moment, "close has an objective measure: the amount of $\Delta v$ required for a rocket to get from here to there. NASA has a list of near-Earth asteroids ranked in order of increasing $\Delta v$. The ten asteroids at the top of the list, requiring the least $\Delta v$, are given below. Due to ...


2

Worth mining, as in making money from mining an asteroid, the answer is we don't know. To know what an asteroid is worth, we have to know what it's composed of and how much of any valuable metals/materials the asteroid contains. Currently we don't have that type of information. Also, I not aware of any viable asteroid capturing or harvesting system that ...


8

On Earth, before a mineral or petroleum resource is mined/extracted, the deposit is delineated and evaluated. Briefly, the process involves sending a some geologists and some drill rigs and their operators to a deposit and drilling holes through the deposit on a predetermined grid pattern. The drill cuttings or core (depending on the type of drill used) ...


4

The list doesn't specify a distance to the Earth (the "ground") because this is always changing as the asteroid travels around its orbit. You can get an idea of the asteroid's orbit using the JPL Small Body Browser and typing the name into the search box. (The first entry (2018 AV2) won't work as it has been removed as likely to be part of the Apollo 10 ...


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