I need an official ruling.

My question is can action cards target the rebel base space?

Specifically the situation was Luke Skywalker had just preformed an action/mission that resulted in him being sent to the rebel base space.

The next turn of the round the Imperial player wanted to use Collect Bounty (TEXT: Atempt against a rebel leader in any system. If successful, capture that leader. Then move that leader and this leader to the closest system that contains a imperial unit.) by sending his imperial agent to the rebel base space in an attempt to imprison Luke. I stated that since the rebel base space is not a system this card or any action card requiring the targeting of "a system" cannot target the space.

Note in the above situation the rebel base had not been revealed.

Also, how does this scenario change if the rebel base is revealed?

You are correct, the Rebel base space is not a system per the rules. So Imperials cannot go there. But if it is discovered, then the units on the Rebel base are placed in the physical planet where it is located, which the Imperials are free to conduct missions too.

You are correct, the Rebel base space is not a system per the rules. So Imperials cannot go there. But if it is discovered, then the units on the Rebel base are placed in the physical planet where it is located, which the Imperials are free to conduct missions too.

Following this above explanation does that mean any objectives that require the rebel played to for example count loyal systems cannot count the rebel base space for purposes of scoring such objectives?

Example you have 5 rebel loyalty markers in play, therefore you cannot score the objective requiring 6 since the objective states systems and the rebel base is not a system?

You are correct, the Rebel base space is not a system per the rules. So Imperials cannot go there. But if it is discovered, then the units on the Rebel base are placed in the physical planet where it is located, which the Imperials are free to conduct missions too.

Following this above explanation does that mean any objectives that require the rebel played to for example count loyal systems cannot count the rebel base space for purposes of scoring such objectives?

Example you have 5 rebel loyalty markers in play, therefore you cannot score the objective requiring 6 since the objective states systems and the rebel base is not a system?

Correct the rebel base space does not count for that objective.