Original: It was given the temporary designation S/1989 N 4discovery IAUC circular The discovery was announced ( IAUC 4824 ) on August 2 , 1989 , but the text only talks of '' 10 frames taken over 5 days '' , giving a discovery date of sometime before July 28 .
Simplified: The discovery was said ( IAUC 4824 ) on August 2 , 1989 , but the text only talks of '' 10 frames taken over 5 days '' , giving a discovery date of sometime before July 28 .