CREATE TABLE table_name_24 (constellation VARCHAR, right_ascension___j2000__ VARCHAR, object_type VARCHAR, ngc_number VARCHAR)
what is the constellation when the object type is spiral galaxy, the ngc number is less than 3593 and the right ascension (j2000) is 11h05m48.9s?
SELECT constellation FROM table_name_24 WHERE object_type = "spiral galaxy" AND ngc_number < 3593 AND right_ascension___j2000__ = "11h05m48.9s"