CREATE TABLE table_191323_2 (notes VARCHAR2, nssdc_id_no VARCHAR2)

What are the notes of the satellite whose nssdc id number is 1959-002a?
SELECT notes FROM table_191323_2 WHERE nssdc_id_no = "1959-002A"
SELECT "notes" FROM "table_191323_2" WHERE "1959-002A" = "nssdc_id_no"