Low Earth orbit
A low Earth orbit ( LEO ) is defined by Space-Track.org as an Earth-centered orbit with at least 11.25 periods per day (an orbital period of 128 minutes or less) and an eccentricity less than 0.25. [1] Most of the manmade objects in space are in LEO orbits. [2] A histogram of the mean motion of the cataloged objects shows that the number of objects drops significantly beyond 11.25. [3]
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| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
76447 characters 8 sections 15 paragraphs 13 images 185 internal links 22 external links |
leo 0.788 orbits 0.199 orbit 0.178 altitude 0.144 objects 0.127 satellites 0.116 earth 0.078 space 0.076 orbital 0.075 drag 0.070 low 0.069 geostationary 0.065 apogee 0.064 spaceflights 0.063 lowest 0.062 |
A low Earth orbit ( LEO ) is defined by Space-Track.org as an Earth-centered orbit with at least 11.25 periods per day (an orbital period of 128 minutes or less) and an eccentricity less than 0.25. [1] Most of the manmade objects in space are in LEO orbits. [2] A histogram of the mean motion of the cataloged objects shows that the number of objects drops significantly beyond 11.25. [3] |
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| 2017 |
62174 characters 7 sections 11 paragraphs 13 images 170 internal links 14 external links |
leo 0.593 drag 0.223 orbit 0.204 objects 0.145 orbits 0.142 orbital 0.122 low 0.117 atmospheric 0.113 earth 0.112 altitude 0.110 delta 0.101 congested 0.094 domino 0.094 eleo 0.094 ico 0.094 |
A low Earth orbit ( LEO ) is an orbit around Earth with an altitude of 2,000 kilometres (1,200 mi) or less, and an orbital period of between about 84 and 127 minutes. Objects below approximately 160 kilometres (99 mi) will experience very rapid orbital decay and altitude loss due to atmospheric drag. [1] [2] |
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| 2016 |
60522 characters 7 sections 10 paragraphs 13 images 168 internal links 11 external links |
leo 0.590 orbit 0.216 orbital 0.162 objects 0.145 orbits 0.142 altitude 0.137 drag 0.133 low 0.131 earth 0.121 reduces 0.108 delta 0.100 velocity 0.094 congested 0.093 domino 0.093 eleo 0.093 |
A low Earth orbit ( LEO ) is an orbit around Earth with an altitude between 160 kilometers (99 mi) ( orbital period of about 88 minutes), and 2,000 kilometers (1,200 mi) (about 127 minutes). Objects below approximately 160 kilometers (99 mi) will experience very rapid orbital decay and altitude loss. [1] [2] The orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s, but reduces with increased orbital altitude. |
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| 2015 |
60539 characters 7 sections 10 paragraphs 13 images 169 internal links 11 external links |
leo 0.559 orbit 0.208 altitude 0.169 orbital 0.166 objects 0.149 orbits 0.145 drag 0.137 low 0.135 earth 0.124 reduces 0.111 delta 0.103 velocity 0.097 congested 0.096 domino 0.096 eleo 0.096 |
A low Earth orbit ( LEO ) is an orbit around Earth with an altitude between 160 kilometers (99 mi) ( orbital period of about 88 minutes), and 2,000 kilometers (1,200 mi) (about 127 minutes). Objects below approximately 160 kilometers (99 mi) will experience very rapid orbital decay and altitude loss. [1] [2] The orbital velocity needed to maintain a stable low Earth orbit is about 7.8 km/s, but reduces with increased orbital altitude. |
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| 2014 |
57491 characters 7 sections 9 paragraphs 14 images 169 internal links 8 external links |
leo 0.584 orbit 0.189 objects 0.155 orbits 0.152 altitude 0.147 drag 0.143 orbital 0.130 low 0.125 earth 0.120 delta 0.108 congested 0.100 domino 0.100 eleo 0.100 ico 0.100 kessler 0.100 |
A low Earth orbit ( LEO ) is an orbit around Earth with an altitude between 160 kilometers (99 mi), ( orbital period of about 88 minutes), and 2,000 kilometers (1,200 mi) (about 127 minutes). Objects below approximately 160 kilometers (99 mi) will experience very rapid orbital decay and altitude loss. [1] [2] With the exception of the manned lunar flights of the Apollo program , all human spaceflights have taken place in LEO (or were suborbital). The altitude record for a human spaceflight in LEO was Gemini 11 with an apogee of 1,374.1 kilometers (853.8 mi). All manned space stations to date, as well as the majority of satellites , have been in LEO. |
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| 2013 |
57173 characters 7 sections 9 paragraphs 14 images 169 internal links 8 external links |
leo 0.563 orbit 0.198 orbits 0.160 altitude 0.154 drag 0.150 objects 0.136 low 0.132 orbital 0.114 delta 0.113 earth 0.105 congested 0.105 eleo 0.105 ico 0.105 kessler 0.105 latency 0.105 |
A low Earth orbit ( LEO ) is an orbit with an altitude between 160 kilometers (99 mi), with a period of about 88 minutes, and 2,000 kilometers (1,200 mi), with a period of about 127 minutes. Objects below approximately 160 kilometers (99 mi) will experience very rapid orbital decay and altitude loss. [1] [2] With the exception of the lunar flights of the Apollo program , all human spaceflights have taken place in LEO (or were suborbital). The altitude record for a human spaceflight in LEO was Gemini 11 with an apogee of 1,374.1 kilometers (853.8 mi). All manned space stations to date, as well as the majority of artificial satellites , have been in LEO. |
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| 2012 |
50195 characters 5 sections 14 paragraphs 12 images 144 internal links 9 external links |
leo 0.712 orbits 0.168 satellites 0.157 latency 0.133 geostationary 0.132 drag 0.127 orbit 0.125 earth 0.120 template 0.112 mi 0.112 altitude 0.098 low 0.094 objects 0.086 space 0.075 orbital 0.072 |
A low Earth orbit ( LEO ) is generally defined as an orbit below an altitude of approximately 2,000 kilometers (1,200 mi). Given the rapid orbital decay of objects below approximately 200 kilometers (120 mi), the commonly accepted definition for LEO is between 160 kilometers (99 mi) and 2,000 kilometers (1,200 mi) above the Earth's surface. [1] [2] With the exception of the lunar flights of the Apollo program , all human spaceflights have taken place in LEO (or were suborbital). The altitude record for a human spaceflight in LEO was Gemini 11 with an apogee of 1,374.1 kilometers (853.8 mi). All manned space stations to date, as well as the majority of artificial satellites , have been in LEO. |
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| 2011 |
43340 characters 5 sections 10 paragraphs 9 images 129 internal links 6 external links |
leo 0.747 orbits 0.204 geostationary 0.160 orbit 0.117 080 0.117 drag 0.115 satellites 0.106 earth 0.105 objects 0.105 altitude 0.095 orbital 0.088 inclination 0.086 freefall 0.081 congested 0.081 eleo 0.081 |
A low Earth orbit ( LEO ) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160–2,000 km (100–1,240 miles) above the Earth's surface. [1] [2] |
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| 2010 |
43258 characters 5 sections 10 paragraphs 9 images 128 internal links 6 external links |
leo 0.745 orbits 0.204 geostationary 0.160 orbit 0.117 drag 0.115 satellites 0.105 objects 0.104 earth 0.097 altitude 0.095 orbital 0.088 inclination 0.086 500 0.082 freefall 0.080 congested 0.080 eleo 0.080 |
A low Earth orbit ( LEO ) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160 - 2,000 km (100 - 1,240 miles) above the Earth's surface. [1] [2] |
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| 2009 |
40284 characters 5 sections 10 paragraphs 7 images 137 internal links 6 external links |
leo 0.735 orbits 0.201 geostationary 0.158 orbit 0.115 drag 0.113 satellites 0.104 objects 0.103 flights 0.096 earth 0.095 altitude 0.093 inclination 0.085 500 0.081 freefall 0.079 congested 0.079 eleo 0.079 |
A low Earth orbit ( LEO ) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160 - 2,000 km (100 - 1,240 miles) above the Earth's surface. [1] [2] |
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| 2008 |
41393 characters 5 sections 10 paragraphs 8 images 141 internal links 4 external links |
leo 0.741 orbits 0.203 geostationary 0.159 orbit 0.116 drag 0.114 satellites 0.105 earth 0.096 altitude 0.094 delta 0.086 inclination 0.086 objects 0.083 500 0.082 freefall 0.080 congested 0.080 eleo 0.080 |
A Low Earth Orbit (LEO) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160 - 2000 km (100 - 1240 miles) above the Earth's surface. [1] [2] |
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| 2007 |
32939 characters 5 sections 9 paragraphs 3 images 134 internal links 3 external links |
leo 0.751 orbits 0.205 geostationary 0.161 orbit 0.118 drag 0.116 satellites 0.106 earth 0.097 delta 0.087 inclination 0.087 objects 0.084 freefall 0.081 laptops 0.081 congested 0.081 eleo 0.081 ico 0.081 |
A Low Earth Orbit (LEO) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 160 - 2000 km (100 - 1240 miles) [1] [2] above the Earth's surface. |
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| 2006 |
12172 characters 1 sections 8 paragraphs 0 images 40 internal links 3 external links |
leo 0.775 orbits 0.191 geostationary 0.166 orbit 0.134 satellites 0.110 earth 0.092 delta 0.090 inclination 0.090 objects 0.087 freefall 0.084 laptops 0.084 congested 0.084 eleo 0.084 ico 0.084 meo 0.084 |
A low Earth orbit (LEO) is generally defined as an orbit within the locus extending from the Earth’s surface up to an altitude of 2,000 km. Given the rapid orbital decay of objects below approximately 200 km, the commonly accepted definition for LEO is between 200 - 2000 km (124 - 1240 miles) [1] [2] above the Earth's surface. Objects in LEO encounter atmospheric drag in the form of gases in the thermosphere (approximately 80-500 km up) or exosphere (approximately 500 km and up), depending on orbit height. LEO is an orbit around Earth between the atmosphere and below the inner Van Allen radiation belt . |
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| 2005 |
6464 characters 2 sections 8 paragraphs 0 images 29 internal links 0 external links |
leo 0.683 geostationary 0.214 orbits 0.191 satellites 0.141 orbit 0.125 inclination 0.115 hover 0.108 congested 0.108 ico 0.108 envisat 0.108 726 0.108 communication 0.105 drag 0.103 uavs 0.097 airships 0.097 |
A low Earth orbit (LEO) is an orbit around Earth between the atmosphere and the Van Allen radiation belt , with a low angle of inclination. These boundaries are not firmly defined but are typically around 200 - 1200 km (124 - 726 miles) above the Earth's surface. This is generally below intermediate circular orbit (ICO) and far below geostationary orbit . Orbits lower than this are not stable and will decay rapidly because of atmospheric drag. Orbits higher than this are subject to early electronic failure because of intense radiation and charge accumulation. Orbits with a higher inclination angle are usually called polar orbits . |
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| 2004 |
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leo 0.545 satellites 0.209 orbit 0.209 objects 0.166 hover 0.160 congested 0.160 ico 0.160 drag 0.152 junk 0.144 weightless 0.135 downside 0.129 1400 0.119 height 0.116 atmospheric 0.116 transmitters 0.113 |
A Low Earth Orbit (LEO) is an orbit in which objects such as satellites are below intermediate circular orbit (ICO) and far below geostationary orbit , but typically around 350 - 1400 km above the Earth's surface. Orbits lower than this are not stable, and will decay rapidly because of atmospheric drag. Satellites in a LEO travel at ca. 27,400 km/h (8 km/s), that is one revolution in ca. 90 mins. |
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| 2003 |
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leo 0.568 satellites 0.255 orbit 0.198 congested 0.194 ico 0.194 junk 0.175 weightless 0.164 hr 0.156 downside 0.156 objects 0.151 1400 0.145 transmitters 0.137 stepping 0.137 travel 0.130 geostationary 0.129 |
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| 2002 |
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leo 0.509 satellites 0.274 orbit 0.213 congested 0.209 ico 0.209 junk 0.189 weightless 0.177 hr 0.168 downside 0.168 objects 0.163 1400 0.156 transmitters 0.148 stepping 0.148 travel 0.140 geostationary 0.138 |
A low Earth orbit (LEO) is an orbit in which objects such as satellites are below intermediate circular orbit (ICO) and far below geostationary orbit , but typically around 350 - 1400 km above the Earth's surface. Orbits lower than this are not stable, and will decay rapidly because of atmospheric drag. Satellites in a LEO travel at ca. 27,400 km/hr (8 km/s), that is one revolution in ca. 1.5 hour. |