In many real-time applications such as command and control, industrial automation, aerospace and defense systems, telecommunications data are normally distributed among several locations. Often this data must be obtained and updated in a timely fashion. But sometimes data that is required at a particular location is not available when it is needed, and getting it from remote site may take too long and may become invalid, violating the timing constraints of the requesting transaction. One of the solutions, for the above mentioned problem, is replication of data in real time databases. This makes the data available locally on the requested site. Unfortunately, very little research has been carried out in replicating the data in real-time databases, especially in real-time object oriented databases. We have developed an algorithm called JITRTR (Just-In-Time-Real Time Replication) algorithm that generates replication transactions that copy required data where and when it is needed. The algorithm takes the requests and updates from the specifications and translates them into local transactions. It also analyzes the parameters of the requests and updates and creates replication transactions so that all the requests always read valid data at any point of time. The JITRTR replication algorithm takes care that all requests always read valid data. The algorithm has two versions. The first version deals with requests or updates made on the full object. Second version deals with requests made on the methods of objects.