Name: Ariel 4 — launch
Start: 1971-12-11
Location: South Vandenberg AFB, California

Launch code: OS. Source references: VCR; LAAFB.

Jonathan McDowell — General Catalog of Artificial Space Objects (opens in a new tab) — Data from GCAT (J. McDowell, planet4589.org/space/gcat), CC BY 4.0. Adapted into anniversary records. (CC BY 4.0)

1972-09-02 Triad — launch Shares a spacecraft, person or other linked entity
1976-05-22 P76-5 — launch Shares a spacecraft, person or other linked entity
1971-01-21 KH-8A — launch Same organization: USAF Space and Missile Systems Organization
1971-03-21 OPS 4788 — launch Same organization: USAF Space and Missile Systems Organization
1971-03-24 CORONA 142/1114 — launch Same organization: USAF Space and Missile Systems Organization
1971-01-12 Kosmos-390 — launch Same type of event: Orbital launch