No, its in the valley-ish area in front of the Temple of Crota (refer to my description above, I believe the mission is called "The Dark Beyond" and it's the first moon mission). From where you enter cut scene in that mission and your ghost says "We've woken the Hive!" after the cutscene, look right (basically on the front door steps of the Temple of Crota). You'll see a raised platform on your right. Jump up there and follow the path up (it will walk you back the way you entered the area only higher up). At the top, you'll come to a cul-de-sac and I believe there's a pile of bones in the center. You'll see a banner/flag on a pole near the wall.