A control apparatus is configured to execute: acquisition processing of acquiring, from at least one data acquisition apparatus, as data on a second object, time series data on a series of pieces of information on the second object that has been collected since the at least one data acquisition apparatus detected the second object; determination processing of determining whether or not the first and the second object are identical to each other based on information on the first and the second object; and storage processing of storing, when the determination processing results that the first and the second object are/aren't identical to each other, the data on the second object and the data on the first object in association with/without each other, and when the determination processing results in a determination that the first object and the second object are not identical to each other.