Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_18161217_2 (cospar_id VARCHAR, estimated_operational_life VARCHAR, satellite VARCHAR)

### Question ###
What is the cospar ID of the Kosmos 2397 satellite, which has an operational life of 2 months?

### Accurate SQL ###

SELECT cospar_id FROM table_18161217_2 WHERE estimated_operational_life = "2 months" AND satellite = "Kosmos 2397"