CREATE TABLE table_55222 ("NGC number" FLOAT, "Object type" CLOB, "Constellation" CLOB, "Right ascension  (  J2000  ) " CLOB, "Declination  (  J2000  ) " CLOB)

Tell me the highest NGC number for right ascension of 09h40m28.5s
SELECT MAX("NGC number") FROM table_55222 WHERE "Right ascension ( J2000 )" = '09h40m28.5s'
SELECT MAX("NGC number") FROM "table_55222" WHERE "Right ascension ( J2000 )" = '09h40m28.5s'