[Rigelian]

The economics of doing this depend on your empire's maintenance costs. With a decent maintenance bonus remote mining can pay off. The downside is that the value of the object decreases by 1% for each turn you mine it - the upside is that this does not increase with the amount of mining components - so having a ship with several remote mining components is a good idea. If it's a really excellent site, and you don't plan to colonise it, you can even build a base there to gain more maintenance benefits.