Table schema:
CREATE TABLE table_name_15 (right_ascension___j2000__ VARCHAR, object_type VARCHAR, apparent_magnitude VARCHAR)

Question: What is the Right ascension of the Object type spiral galaxy that has an Apparent magnitude larger that 12.2
SQL: SELECT right_ascension___j2000__ FROM table_name_15 WHERE object_type = "spiral galaxy" AND apparent_magnitude > 12.2