Hi,No expert for sure. What information you provided doesn't mention anything about the 82nd or the 101st Airborne Divisions.So I Googled the 460th Prcht FA BN and several mentions came up within the Google results below.
And again, I am no expert, but they were more than likelly a battalion (BN)that was "attached" (not assigned permanently) to different units over time.That usually occured when they were needed in other fronts (campaigns) of the war.
Hope someone else with more expertise will provide you a definite answer.Good Luck!!