Editing Geocentric orbit (section)

===Altitude classifications===
[[Image:Orbits around earth scale diagram.svg|thumb|Low (cyan) and Medium (yellow) Earth orbit regions to scale. The black dashed line is the geosynchronous orbit. The green dashed line is the 20,230 km orbit used for [[Global Positioning System|GPS]] satellites.]]
{{anchor|Altitude}}
; [[Transatmospheric orbit]] (TAO): Geocentric orbits with altitudes at [[apogee]] higher than {{cvt|100|km|mi}} and [[perigee]] that intersects with the [[Kármán line|defined atmosphere]].<ref>{{Cite web |last=McDowell |first=Jonathan |date=24 May 1998 |title=Jonathan's Space Report |url=https://planet4589.org/space/jsr/back/news.361.txt |quote=Transatmospheric orbit (TAO): orbital flight with perigee less than 80 km but  more than zero. Potentially used by aerobraking missions and transatmospheric vehicles, also in some temporary phases of orbital flight (e.g. STS pre OMS-2, some failures when no apogee restart)}}</ref>
; [[Low Earth orbit]] (LEO) : Geocentric orbits ranging in altitude from {{cvt|160|km|mi|sigfig=1}} to {{cvt|2,000|km|mi}} above [[mean sea level]]. At 160 km, one revolution takes approximately 90 minutes, and the circular orbital speed is {{cvt|8|km/s|ft/s}}.
; [[Medium Earth orbit]] (MEO) : Geocentric orbits with altitudes at apogee ranging between {{cvt|2,000|km|mi}} and that of the [[geosynchronous orbit]] at {{cvt|35,786|km|mi}}.
; [[Geosynchronous orbit]] (GSO): Geocentric circular orbit with an altitude of {{cvt|35,786|km|mi}}.  The period of the orbit equals one [[sidereal day]], coinciding with the rotation period of the Earth. The speed is approximately {{cvt|3|km/s|ft/s}}.
; [[High Earth orbit]] (HEO) : Geocentric orbits with altitudes at apogee higher than that of the geosynchronous orbit. A special case of high Earth orbit is the [[highly elliptical orbit]], where altitude at perigee is less than {{cvt|2,000|km|mi}}.<ref name="nasa">[http://gcmd.nasa.gov/User/suppguide/platforms/orbit.html Definitions of geocentric orbits from the Goddard Space Flight Center] {{webarchive |url=https://web.archive.org/web/20100527132541/http://gcmd.nasa.gov/User/suppguide/platforms/orbit.html |date=May 27, 2010 }}</ref>