Project Blue Book Case File
Rialto, CaliforniaAugust 1955
Summary
On August 2, 1955, in Rialto, California, a civilian reported one round, yellowish-white object. The Air Force recorded the report under Project 10073, its official record for unidentified flying object reports.
The object looked about the size of a nickel held at arm's length. It appeared to bob up and down over a period of about ten minutes.
The Air Force noted the description matched a balloon. Officials said the duration and behavior supported that conclusion and marked the case as possibly a balloon.
Reported location
Rialto, California
Date of incident
August 1955
State / country
CA / US
Page count
1 scanned page
USAF evaluation
unidentified
Microfilm
T1206, Roll 23