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_7 (ngc_number INTEGER, right_ascension___j2000__ VARCHAR)

### Question ###
What is the average NGC number of everything with a Right ascension (J2000) of 05h33m30s?

### Accurate SQL ###

SELECT AVG(ngc_number) FROM table_name_7 WHERE right_ascension___j2000__ = "05h33m30s"