Yes, I think that transcendent is a great adjective for this concept of morality I'm attached to. I like it because it makes it clear why I would label the attachment 'theistic' even though I have no attachment that I'm aware of to other necessarily 'religious' beliefs.

Since I do 'believe in' physical materialism, I expect science to eventually explain that morality can transcend the subjective/objective chasm in some way or that if morality does not, to identify whether this fact about the universe is consistent or inconsistent with my particular programming. (This latter component specifically is the part I was thinking you haven't covered; I can only say this much now because the discussion had helped develop my thoughts quite a bit already.)