1945-1991: Cold War world Wiki
Luna 4/E-6 No.4.
Category. Statistic.
Launch vehicle. Molniya-L 8K78/E6 rocket.
Launch date. April 2th, 1963, 08:04:00 UTC.
Launch site. Baikonur 1/5.
Ceased operations. April 6th, 1963.
Owner(s). A unspecified Soviet government department.
Major contractor(s). OKB-1.
Is it still in orbit. N/A.
Launch mass. 1,422 kilograms (3,135 lb).
Nationality(s). Soviet.
Satellite type. Lunar lander.
Links. https://en.wikipedia.org/wiki/Luna_4.

Closest approach to the moon- April 5th, 1963, 13:25 UTC. It got locked into Earth orbit by mistake.