The sign says it all:

I’ve learned that Atlantis had one final job to perform after undocking from the ISS and before returning home. Earlier today, the crew deployed a tiny satellite called PicoSat from a canister in her payload bay. Weighing in at only eight pounds, PicoSat’s function is to send back data on the performance of its own solar power cells, in hopes of learning something that could be useful for future space hardware. PicoSat is, of course, the last payload that will ever be deployed by a U.S. space shuttle, the 180th over the last three decades.

Atlantis looks to be in good shape and the weather forecast is favorable for a deorbit burn following her 200th orbit for this flight, leading up to a scheduled landing at 5:56 tomorrow morning, Eastern time (that’ll be 3:56 here in Utah). If something goes wrong, she’ll try again at the end of her 201st orbit, coming down at 7:32 AM Eastern (5:32 Mountain time). I’ve been thinking I shouldn’t even try to get up for the event — after all, I don’t sleep enough as it is, and this past week has been worse than usual in that regard, and I have a job to get to and plans for tomorrow evening that will probably result in yet another late night — but like I’ve been saying all along, this is important. Odds are I’m going to be very bleary-eyed when I stagger into work tomorrow…

Photo source.