THUNK! DART, Meet MUBLCOM [1]: "NASA’s DART satellite may have bumped into the MUBLCOM satellite during a proximity operation:

NASA’s DART rendezvous satellite may have come in physical contact with its target spacecraft during its April 15 mission, which ended early when DART ran out of fuel, prime contractor Orbital Sciences Corp. said April 21. In a conference call on Orbital Sciences’ first-quarter earnings, company President J.R. Thompson said the DART, or Demonstration of Autonomous Rendezvous Technology, satellite may have come much closer than 100 meters—as originally estimated—to its target, the MUBLCOM satellite.

[snip]

‘There is some data to suggest that indeed it got a lot closer [than 100 meters], and perhaps even touched the target,’ Thompson said. ‘All other DART systems performed as expected.’

I guess my paper—Autonomous Proximity Operations: A Coming Collison in Orbit—was a little too literal."

(Via ArmsControlWonk.com.)