A collision avoidance assistance system to acquire space object information from a space information recorder that records space object information acquired from a management business device used by a management business operator that manages a plurality of space objects, and assist avoidance of a collision between space objects among the plurality of space objects, the collision avoidance assistance system comprising:
- a database to store the space object information;
- and
- a server including processing circuitry to decide a collision avoidance business operator that is to execute collision avoidance,
- wherein the server includes
- a phase of accepting, from the space information recorder, a notification notifying that a collision between a space object A and a space object B included in the plurality of space objects is foreseen;
- a phase of acquiring, from the space information recorder, an estimated time or time period of the foreseen collision, orbit forecast information of the space object A, and orbit forecast information of the space object B;
- a phase of notifying a danger alert, which is a collision alert or a proximity alert at the estimated time or time period, to at least one or all of a business operator of the space object A, a business operator of the space object B, and a debris removal business operator,
- a phase of selecting a collision avoidance business operator;
- and
- a phase of requesting the selected collision avoidance business operator to take a collision avoidance action,
- wherein the space object information includes information indicating presence or absence of a collision avoidance function in a space object, and
- wherein when both the space object A and the space object B have the collision avoidance function, the processing circuitry selects a collision avoidance business operator using whether each space object is a steady operation object or a non-steady operation space object as an evaluation criterion.