Category:Explorer 21

**Explorer 21**
	American satellite of Explorers program
	Upload media
	Wikipedia
Instance of	spacecraft;
Start point	Cape Canaveral Space Launch Complex 17;
Space launch vehicle	Delta C;
UTC date of spacecraft launch	4 October 1964;
Significant event	rocket launch (1964, Cape Canaveral Space Launch Complex 17);
Authority file
	Q3736074;
	Reasonator; Scholia; Wikidocumentaries; PetScan; statistics; WikiMap; Locator tool; KML file; Search depicted;