Watch right animation something goes through the first wave of particles (green) right as it starts to pass Spitzer the pink square. Yes object was round.
Close to 18:00 on the time stamp above.
Might be a good way to confirm an objects presence.
NASA SOHO B facing that direction conveniently is missing slides between 14:18 & 19:30
http://iswa.gsfc.nasa.gov/IswaSystemWebApp/iSWACygnetStreamer?timestamp=2038-01-23+00%3A44%3A00&window=-1&cygnetId=261