X-15A 3 F-44 Spacecraft: X-15A No. 3 Launch Vehicle: NB-52 Launched: 29 Jun 1965 Prime Crew	⇑ Mission List ⇑ Designation: X-15A S-6 Description: 6th X-15A manned suborbital
	J H Engle

Altitude: 53.1 miles (85.5 km) The International Aeronautical Federation recognizes a flight above 100 kilometers (62.14 statute miles) as being a spaceflight. The United States recognizes a flight above 50 statute miles (80.46 kilometers) as being a spaceflight. The lowest recorded perigee of a satellite orbit is 78 kilometers (48.5 statute miles). References: Encyclopedia Astronautica. Wikipedia.