At 15:45 UTC tomorrow, July 10, the European Space Agency probe Rosetta will fly to within 3200 km (2000 miles) of the asteroid 21 Lutetia. This close pass will reveal, for the first time, the shape and details of this roughly 100-km-diameter rock.
You can watch this event live as it happens; ESA is streaming the event. Around 01:00 UTC they'll start presenting the images, too. Below is an embedded feed that will go live once the actual stream starts.
I'm very excited about this! This is all happening during TAM 8, but I'll try to watch it live if I can too.