Vanguard 1
 | |
| Operator | Naval Research Laboratory |
|---|---|
| COSPAR ID | 1958-002B |
| SATCAT no. | 00005 |
| Mission duration | Planned: 90 Days In Orbit: 66 years, 1 month and 13 days |
| Spacecraft properties | |
| Spacecraft | Vanguard 1 |
| Manufacturer | United States Naval Research Laboratory |
| Launch mass | 1.46 kg (3.2 lb) |
| Start of mission | |
| Launch date | March 17, 1958 12:15:41 (UTC) |
| Rocket | Vanguard TV-4 |
| Launch site | Cape Canaveral Air Force Station LC-18A |
| Deployed from | Vanguard 3rd Stage |
| Deployment date | March 17, 1958, 12:26:51 (UTC) |
| End of mission | |
| Disposal | Decomissioned |
| Last contact | May 2, 1964 |
| Decay date | 2198 (Estimated) ~ 240 Years Orbital Lifetime |
| Orbital parameters | |
| Reference system | Geocentric Orbit |
Vanguard 1 is an American satellite that was the fourth artificial Earth-orbiting satellite to be successfully launched, following Sputnik 1, Sputnik 2, and Explorer 1. it was launched 17 March 1958. Vanguard 1 was the first satellite to have solar electric power.
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