What's the lowest listed longitude that has a Latitude of 46.843963 and Water (sqmi) that is smaller than 0.052000000000000005?
CREATE TABLE "d" (
  "township" text,
  "county" text,
  "pop_2010" real,
  "land_sqmi" real,
  "water_sqmi" real,
  "latitude" real,
  "longitude" real,
  "geo_id" real,
  "ansi_code" real
);
SELECT MIN("longitude") FROM "d" WHERE "latitude"=46.843963 AND "water_sqmi"<0.052000000000000005;