A synchronous orbit is an orbit in which an orbiting body (usually a satellite) has a period equal to the average rotational period of the body being orbited...

A Sun-synchronous orbit (SSO), also called a heliosynchronous orbit, is a nearly polar orbit around a planet, in which the satellite passes over any given...

A semi-synchronous orbit is an orbit with a period equal to half the average rotational period of the body being orbited, and in the same direction as...

point in the sky. Subsynchronous orbit: A drift orbit close below GSO/GEO. Semi-synchronous orbit: An orbit with an orbital period equal to half of the average...

significant. A satellite in the semi-synchronous orbit at an altitude of approximately 20,200 kilometres (12,600 mi) has an orbital period of 12 hours and passes...

rotation rate over the course of a complete orbit. In the case where a tidally locked body possesses synchronous rotation, the object takes just as long to...

Medium Earth orbit Molniya orbit Subsynchronous orbit Supersynchronous orbit Synchronous orbit Howell, Elizabeth. "What Is a Geosynchronous Orbit?". Space...

rotation of the Earth. Semi-synchronous orbit (SSO) An orbit with an altitude of approximately 20,200 km (12,600 mi) and an orbital period of approximately...

advantage of the Earth's rotation. Other useful LEO orbits including polar orbits and Sun-synchronous orbits have a higher inclinations to the equator and provide...

yields a synchronous orbit radius of 20,428 km (12,693 mi) above the surface of the Mars equator. Subtracting Mars's radius gives an orbital altitude...

The areosynchronous orbits (ASO) are the synchronous orbits for artificial satellites around the planet Mars. They are the martian equivalent of the geosynchronous...

the first privately funded human spaceflight Semi-synchronous orbit, a type of orbit Single-stage-to-orbit, a reusable vehicle that reaches space without...

graveyard orbit, also called a junk orbit or disposal orbit, is an orbit that lies away from common operational orbits. One significant graveyard orbit is a...

and Moon will in general perturb the orbital plane. For a Sun-synchronous orbit, the precession of the orbital plane caused by the oblateness of the...

transfer orbit (GTO) or geosynchronous transfer orbit is a highly elliptical type of geocentric orbit, usually with a perigee as low as low Earth orbit (LEO)...

Canaveral Space Force Station, and placed USA-343 directly into semi-synchronous orbit. About eight minutes after launch, Falcon 9 successfully landed...

an elliptical orbit or eccentric orbit is an orbit with an eccentricity of less than 1; this includes the special case of a circular orbit, with eccentricity...

orbit to provide telecommunications services. Near-polar orbiting satellites commonly choose a sun-synchronous orbit, where each successive orbital pass...

and placed USA-289 directly into semi-synchronous orbit. As of 2021, USA-289 was in a 55-degree inclination orbit with a perigee of 20,158 kilometers...

Cape Canaveral Air Force Station, and placed USA-309 directly into semi-synchronous orbit. About eight minutes after launch, Falcon 9 B1062 successfully landed...

A geostationary orbit, also referred to as a geosynchronous equatorial orbit (GEO), is a circular geosynchronous orbit 35,786 km (22,236 mi) in altitude...

subsynchronous orbit is an orbit of a satellite that is nearer the planet than it would be if it were in synchronous orbit, i.e. the orbital period is less...

eccentricity of the orbit. In astronomy, the semi-major axis is one of the most important orbital elements of an orbit, along with its orbital period. For Solar...

Canaveral Space Force Station, and placed USA-319 directly into semi-synchronous orbit. About eight minutes after launch, Falcon 9 successfully landed...

deployed USA-293 directly into a semi-synchronous orbit. As of 2021, USA-293 was in a 55.4 degree inclination orbit with a perigee of 20,157 kilometres...

The Moon orbits Earth in the prograde direction and completes one revolution relative to the Vernal Equinox and the fixed stars in about 27.3 days (a tropical...

A circular orbit is an orbit with a fixed distance around the barycenter; that is, in the shape of a circle. In this case, not only the distance, but...

proposed alternative approach would use a solar sail to attain a Mercury-synchronous orbit around the Sun. The first spacecraft to visit Mercury was NASA's Mariner...

of the orbited body, r is the distance at which the speed is to be calculated, and a is the length of the semi-major axis of the elliptical orbit. This...

trajectories. Like an elliptical orbit, a hyperbolic trajectory for a given system can be defined (ignoring orientation) by its semi major axis and the eccentricity...