Table 2. Orbits of US Keyhole Program

Project	Satellite	Launch year	Orbit (km)	Inclination (deg)
KH-11	OPS5750	1976	247 × 553	96.9
	OPS4515	1978	297 × 509	96.8
	OPS2581	1980	309 × 501	97.1
	OPS3984	1981	244 × 526	96.9
	OPS9627	1982	280 × 522	96.9
	USA-6	1984	335 × 758	98.0
	USA-27	1987	300 × 1,000	98.0
	USA-33	1988	300 × 1,000	98.0
KH-12	USA-86	1992	408 × 931	97.7
	USA-116	1995	405 × 834	97.7
	USA-129	1996	292 × 894	97.7
	USA-161	2001	309 × 965	97.9
	USA-186	2005	256 × 1,006	97.9
KH-13	USA-224	2011	290 × 985	97.9

KH, keyhole.