459
xkcd #2908: Moon Armor Index
(imgs.xkcd.com)
Alt text:
Astronomers are a little unsure of the applicability of this index, but NASA's Planetary Protection Officer is all in favor.
I heard Everest is actually exactly 348 KI, they just thought 348.324 KI sounded more accurate
I've heard that in feet they originally measured it to 29000 exactly. But they added 2 feet so people didn't think they were estimating the height.