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_61 ( ngc_number INTEGER, object_type VARCHAR, right_ascension___j2000__ VARCHAR )

### Question ###
Which NGC number has an Object type of open cluster, and a Right ascension (J2000) of 06h01m06s?

### Accurate SQL ###

SELECT MAX(ngc_number) FROM table_name_61 WHERE object_type = "open cluster" AND right_ascension___j2000__ = "06h01m06s"