CREATE TABLE table_51224 ("NGC number" FLOAT, "Object type" TEXT, "Constellation" TEXT, "Right ascension  (  J2000  ) " TEXT, "Declination  (  J2000  ) " TEXT, "Apparent magnitude" FLOAT)

what is the apparent magnitude of the constellation sculptor
SELECT COUNT("Apparent magnitude") FROM table_51224 WHERE "Constellation" = 'sculptor'
SELECT COUNT("Apparent magnitude") FROM "table_51224" WHERE "Constellation" = 'sculptor'