Jane Kelly is apparently a personal friend of Obama's? She graduated with him. Which raises issues all on its own. She was appointed by him.
She was a federal PD. And appears to have gone straight from the PD Office to the Circuit Court, which is somewhat unusual (even smacks of desperation). I used to have to sit in court and wait on the federal PDs to make their pleas (crim always has priority over civil). Never saw a single one who would fall under the category of "moderate." Never. Not once.
Since she is so new, she has little appellate record (and, of course, zero record as a trail court judge). Which I guess is part of the game here (and which raises the question of why you think she is moderate?). But since Obama knows her personally, he already knows where she sits on his key issues. That would be a big jump, PD Office, roughly two years as an appellate judge, straight to the SCOTUS.
Anyway, as stated, no one from a PD Office is a "moderate." In fact, you could probably say that about any friend of Obama. I think she has zero chance.