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_name_59 (right_ascension___j2000__ VARCHAR, object_type VARCHAR, ngc_number VARCHAR)

### Question ###
Tell me the right ascension for open cluster and NGC number more than 2547

### Accurate SQL ###

SELECT right_ascension___j2000__ FROM table_name_59 WHERE object_type = "open cluster" AND ngc_number > 2547