Sun crest - Where you fought Yunalesca.
Sun Sigil - Get time of 00:00 in the Calm Lands chocobo race.
Moon crest - Besaid, near boat, swim.
Jupiter crest - Locker in Luca.
Jupiter sigil - Blitz prize.
There another guide for one , its an important thread. That all I remember, im looking for them right now too.