Twice the distance from the middle to the end (unless the moose was born in a Leap Year; then it's twice the distance from the end to the middle).

Checking my astrolabe and Thoth's "Field Guide to Molds and Lichens", I find that Osiris' kneecaps are probably located in the belly of the Jarkov wooly mammoth; as they won't start thawing him until April, we are undoubtedly in for a cold winter.