A High Earth Orbit is a geocentric orbit whose apogee lies above that of a geosynchronous orbit (35,786 km)[1].
Highly Elliptical Orbits are generally considered to be a subset of High Earth Orbits.
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° |  0.06 |
no |
References
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