Tell me the highest NGC number for right ascension of 09h40m28.5s
CREATE TABLE "2901_3000" (
  "ngc_number" real,
  "object_type" text,
  "constellation" text,
  "right_ascension_j2000" text,
  "declination_j2000" text
);
SELECT MAX("ngc_number") FROM "2901_3000" WHERE "right_ascension_j2000"='09h40m28.5s';