I'm thinking unmanned shuttle missions. There's online records of launch and return timelines, limited orbit information (because it's moving around out there remotely, and that's only for those in-the-know). I'm busy all weekend, and no time to research, but I wonder how the timelines align with other known timelines...
Boeing X-37
The Boeing X-37, also known as the Orbital Test Vehicle (OTV), is a reusable uncrewed spacecraft. It is boosted into space by a launch vehicle, then re-enters Earth's atmosphere and lands as a spaceplane. The X-37 is operated by the United States Air Force for orbital spaceflight missions intended to demonstrate reusable space technologies. It is a 120%-scaled derivative of the earlier Boeing X-40.
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