COMPOSITION You missed the intersection of the bottom right third by a bit, but I'm not one to take a ruler out on such things. I go by feel, and by what looks right to MY eye, and I suspect you did as well. The moon as a lovely gibbous gem floating in absolute black space is tough to resist, isn't it? Nice composition. Nice feel for how to crop the image and add interest just by subject placement alone.
TECHNIQUE Astrophotography is damn hard (I know from experience, check my portfolio). The moon seems like such an easy object to photograph, but it's very difficult to photograph well, even with expensive cameras, telescopes, and means to join the two. Your shot has the appearance of a handheld, with enough sharpening and contrast enhancement to make the major lunar features visible. It lacks the critical sharpness and focus that characterizes a classic, drop-dead gorgeous moon shot, but with your composition, that's not really essential anyway. You probably could've tried a slightly faster shutter as some of the lighter areas are a little blown out.
OVERALL IMPACT I've found that DPCers generally like a nice moon shot, but yours apparently didn't rise to the standard, garnering only a 4.8 final score. As I glance at your comments now, I see some of the voters did decide to take you to task on the placement of the moon, and that probably affected their vote too. I like your shot and hope you continue to experiment with moon shots. Try at moonrise or set, when the moon is low on the horizon and you can compose interesting shots with trees, buildings, people, and other foreground objects.
When I hold my rule of third grids onto the screen, your moon seems just a bit to the right of the intersecting point of interest. Good concept though.