Except for the rescue mission as aia mentioned where someone is stranded in space due to running out of oil its a non discussion.
In the previous space bug someone would stay and die in one place visible for other players. With some tricks someone could enter the vehicle of the rescuer. Neil Stockton is quite the expert here. It involved some relogs and good timing but it could be done.
In the current situation, this is at least my experience, the avatar is slowly drifting in space and NOT visible for other players so a rescue mission will never succeed.
The only way to deal with this is to post a reallocation support ticket with MindArk.