Despite their similar and sometimes confusing acronyms and their overall purpose of allowing tax-free reimbursement of various types of medical expenses, health savings accounts (HSAs) and health reimbursement arrangements (HRAs) are quite different when you get down to the details.
A full rotation of Pluto takes 6 Earth days, 9 hours, and some minutes; so the day part should be about half that amount (3 days and 5 hours), at least on average.
The Pluto - Earth distance is 4,536,358,827 km, and is decreasing at the rate of 638,114 km per day. This is as of 2007-June-3, at 00:00 Universal Time (GMT). This is the same as 30.324 AU, and -0.00427 AU/day, respectively.