uhm thats very strange .. pirates are yellow while you are under 'contract' with Triada. I attack them anyway...just some minor experience.
Try to attack some pirates in another sector before jumping in the satellite sector, it won't affect the story. There are several pirate sectors for exp grinding anyway, some with endless spawn and others with very large forces inside
But there should be a spawn of 4 ships (which are yellow and attack you thereafter...) besides the asteroid.
otherwise i dunno.