Vanguard

Vanguard was built by Naval Research Lab and flew 11 launch attempts between Dec 6, 1957 and Sep 18, 1959; 3 succeeded and 8 failed.

11 launchessuccess rate 27.3%United States

Launches per year

19571959

SuccessfulFailed

Spaceports

Cape Canaveral & Kennedy11

Launch agencies

NRL11

All 11 launches

11 launches

Date	Mission	Spaceport	Country	Payloads	Outcome
Sep 18, 1959	Magne-Ray satellite1959 ETA	Cape Canaveral & Kennedy	United States	1	Success
Jun 22, 1959	Radiation Balance sat1959-F03	Cape Canaveral & Kennedy	United States	1	Failure
Apr 14, 1959	Magnetometer satellite1959-F01	Cape Canaveral & Kennedy	United States	2	Failure
Feb 17, 1959	Cloud cover satellite1959 ALP	Cape Canaveral & Kennedy	United States	1	Success
Sep 26, 1958	Cloud cover satellite1958-U01	Cape Canaveral & Kennedy	United States	1	Failure
Jun 26, 1958	X-ray satellite1958-F06	Cape Canaveral & Kennedy	United States	1	Failure
May 28, 1958	Lyman Alpha satellite1958-F05	Cape Canaveral & Kennedy	United States	1	Failure
Apr 29, 1958	X-ray satellite1958-F04	Cape Canaveral & Kennedy	United States	1	Failure
Mar 17, 1958	Vanguard Test Satellite1958 BET	Cape Canaveral & Kennedy	United States	1	Success
Feb 5, 1958	Vanguard Test Satellite1958-F01	Cape Canaveral & Kennedy	United States	1	Failure
Dec 6, 1957	Vanguard Test Satellite1957-F01	Cape Canaveral & Kennedy	United States	1	Failure

Source: GCAT launch list and launch vehicle tables, Jonathan C. McDowell (CC BY 4.0). Image: Wikidata/Commons for the rocket that most of its payloads list as their launcher.