CREATE TABLE table_12781 ("Satellite" TEXT, "Launch date" TEXT, "Carrier rocket" TEXT, "Launch site" TEXT, "COSPAR ID" TEXT)

What is Ariel 3's COSPAR ID?
SELECT "COSPAR ID" FROM table_12781 WHERE "Satellite" = 'ariel 3'
SELECT "COSPAR ID" FROM "table_12781" WHERE "Satellite" = 'ariel 3'