CREATE TABLE table_38581 ("Designation HD" TEXT, "Constellation" TEXT, "Date sent" TEXT, "Arrival date" TEXT, "Message" TEXT)

What date sent has cygnus as a constellation, and hd 190360 as a designation HD?
SELECT "Date sent" FROM table_38581 WHERE "Constellation" = 'cygnus' AND "Designation HD" = 'hd 190360'
SELECT "Date sent" FROM "table_38581" WHERE "Constellation" = 'cygnus' AND "Designation HD" = 'hd 190360'