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_78220 ( "Stellar mass ( M\u2609 )" real, "Planetary mass ( M\u2295 )" real, "Lum. (L 0 )" text, "Type" text, "RHAB ( AU )" real, "RV (cm/s)" real, "Period (days)" real )

### Question ###
What is the highest planetary mass having an RV (cm/s) of 65 and a Period (days) less than 21?

### Accurate SQL ###

SELECT MAX("Planetary mass ( M\u2295 )") FROM table_78220 WHERE "RV (cm/s)" = '65' AND "Period (days)" < '21'