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High Earth orbit(HEO)

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To-scale diagram of low, medium and high earth orbits

A High Earth Orbit is a geocentric orbit whose apogee lies above that of a geosynchronous orbit (35,786 kilometres (22,236 mi)).^[1]

Highly Elliptical Orbits are a subset of High Earth Orbits.^[1]

[edit] Examples of satellites in High Earth Orbit

Name	NSSDC ID	Launch Date	Perigee	Apogee	Period	Inclination	Eccentricity	Highly Elliptical Orbit
Molniya 1-01[2]	1965-030A	1965-04-23	538 km	39,300 km	708.0 min	65.0°	0.736864	yes
Vela 1A[3][4]	1963-039A	1963-10-17	101,925 km	116,528 km	6,519.6 min	37.8°	0.063	no