 The rotational axis of the Moon lies within Shackleton , only a few kilometers from its center . The crater is 21 km in diameter and 4 @.@ 2 km deep . From the Earth , it is viewed edge @-@ on in a region of rough , cratered terrain . It is located within the South Pole @-@ Aitken basin on a massif . The rim is slightly raised about the surrounding surface and it has an outer rampart that has been only lightly impacted . No significant craters intersect the rim , and it is sloped about 1 @.@ 5 ° toward the direction 50 – 90 ° from the Earth . The age of the crater is about 3 @.@ 6 billion years and it has been in the proximity of the south lunar pole for at least the last two billion years . 
 The rotational axis of the Moon <a href='uninflect' title='1'><mark>lies</mark></a> within Shackleton , only a few kilometers from its center . The crater <a href='drop_aux' title='2'><mark>is</mark></a>21 km in diameter and 4 @.@ 2 km deep . From the Earth , it is viewed edge @-@ on in a region of rough , cratered terrain . It is located within the South Pole @-@ Aitken basin on a massif . The rim is slightly raised about the surrounding surface and it <a href='got' title='3'><mark>has</mark></a> an outer rampart <a href='null_relcl' title='4'><mark>that</mark></a><a href='been_done' title='5'><mark>has</mark></a> been only lightly impacted . No significant craters intersect the rim , and it is sloped about 1 @.@ 5 ° toward the direction 50 – 90 ° from the Earth . The age of the crater <a href='drop_aux' title='6'><mark>is</mark></a>about 3 @.@ 6 billion years and it <a href='uninflect' title='7'><mark>has</mark></a> been in the proximity of the south lunar pole for at least the last two billion years . 
The rotational axis of the Moon lie within Shackleton , only a few kilometers from its center . The crater 21 km in diameter and 4 @.@ 2 km deep . From da Earth , it is viewed edge @-@ on in a region of rough , cratered terrain . It is located within tdaSouth Pole @-@ Aitken basin on a massif . The rim is slightly raised abt the surrounding surface and it got an outer rampart done been only lightly impacted . No significant craters intersect the rim , and it is sloped about 1 @.@ 5 ° toward thdairection 50 – 90 ° from the Earth . The age of thedaater about 3 @.@ 6 billion years and it have been in the proximity of the dath lunar pole for at least the last two billion years .