That sounds about right. No decay in the traditional sense, hard vacuum in unfiltered sunlight is going to be a pretty great sterilization method. You’ll offgas almost all of your water over time, so you’ll be a spooky mummy at least.
Over time the raw power of the sun and random cosmic ray will “decay” you via splitting apart your component molecules, but i dont know if thats enough to truely poof you away or just make you a very bleached mummy.
“Analysis of the stool has indicated that its producer subsisted largely on meat and bread, despite evidence suggesting that other people at the same place and time had access to fruits, leeks, shellfish, and nuts. The presence of several hundred parasitic eggs suggests the person was riddled with intestinal worms.”
Amazing