MIT research associate and Air National Guard Maj. Myron Herbert Ligda and Joseph V. Connelly (plus another witness) tracked on SCR-615B radar an unidentified object heading north, during MIT Weather Radar Research Group tracking of USAF flight of two Otis AFB F-84 jet fighters which were heading 333° straight and level course at about 400 mph (IAS 250 knots) positioned at range 45 miles 105° azimuth initially, at 9:50 a.m. Object detected at 9:53 a.m. on a nearly intersecting straight line course heading about 358° (at about 500 mph?), F-84 pilots were warned by VHF-1 radio but could not see object due to poor visibility haze when ground radar showed object crossed about three miles (actually plotted about 1-1.5 miles ahead and blips "nearly merged") in front of jets at 9:54:00 a.m. Object speed about 1,500 mph as it made a sharp right turn and loop of about 270° about 15 g's centripetal acceleration back to the west.

One ball was observed by three MIT military witnesses on the shore for two minutes (Ligda, Herbert; Connelly,Joseph V).

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