what is the constellation when the Right ascension ( J2000 ) is 10h18m58.4s?
CREATE TABLE "3101_3200" (
  "ngc_number" real,
  "object_type" text,
  "constellation" text,
  "right_ascension_j2000" text,
  "declination_j2000" text
);
SELECT "constellation" FROM "3101_3200" WHERE "right_ascension_j2000"='10h18m58.4s';