Category:Vanguard I

**Vanguard 1**
	fourth artificial Earth orbital satellite
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Instance of	technology demonstration spacecraft; derelict satellite; artificial satellite of the Earth;
Part of	Vanguard;
Start point	Cape Canaveral Launch Complex 18;
Manufacturer	United States Naval Research Laboratory;
Space launch vehicle	Vanguard (TV-4);
UTC date of spacecraft launch	17 March 1958 (12:15:41);
Type of orbit	medium Earth orbit;
Service retirement	May 1964;
Significant event	rocket launch (1958, Cape Canaveral Launch Complex 18); loss of signal (1964);
Powered by	Bell Solar Battery (6, 1 watt);
Mass	1.46 kg (launch weight);
Diameter	16.5 cm;
Duration	2,200 d;
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	Q676802;
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