Table schema:
CREATE TABLE table_name_2 (right_ascension___j2000__ VARCHAR, ngc_number VARCHAR, object_type VARCHAR, apparent_magnitude VARCHAR)

Question: Tell me the right ascensuon for object type of globular cluster and apparent magnitude of 8.5 and NGC number of 6273
SQL: SELECT right_ascension___j2000__ FROM table_name_2 WHERE object_type = "globular cluster" AND apparent_magnitude = 8.5 AND ngc_number = 6273