What is the cospar ID of the Kosmos 2397 satellite, which has an operational life of 2 months?
create table table_18161217_2 (cospar_id varchar, estimated_operational_life varchar, satellite varchar, PRIMARY KEY (cospar_id))
select cospar_id from table_18161217_2 where estimated_operational_life = "2 months" and satellite = "kosmos 2397"