CREATE TABLE "6601_6700" (
  "ngc_number" real,
  "object_type" text,
  "constellation" text,
  "right_ascension_j2000" text,
  "declination_j2000" text
);

Question: Name the object type with an NGC number more than 6638 and right ascensions being 18h25m37.8s
SQL: SELECT "object_type" FROM "6601_6700" WHERE "ngc_number">6638 AND "right_ascension_j2000"='18h25m37.8s';

Question: Tell me the constellation which has a right ascension of 18h17m41.1s
SQL: SELECT "constellation" FROM "6601_6700" WHERE "right_ascension_j2000"='18h17m41.1s';