CREATE TABLE table_38580 ("Designation HD" TEXT, "Constellation" TEXT, "Date sent" TEXT, "Arrival date" TEXT, "Message" TEXT)

What message has hd 186408 as a designation HD?
SELECT "Message" FROM table_38580 WHERE "Designation HD" = 'hd 186408'
SELECT "Message" FROM "table_38580" WHERE "Designation HD" = 'hd 186408'