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Orbit modeling is the process of creating mathematical models to simulate motion of a massive body as it moves in orbit around another massive body due to gravity.Other forces such as gravitational attraction from tertiary bodies, air resistance, solar pressure, or thrust from a propulsion system are typically modeled as secondary effects.
Geostationary or geosynchronous transfer orbit (GTO): An elliptic orbit where the perigee is at the altitude of a low Earth orbit (LEO) and the apogee at the altitude of a geostationary orbit. Hohmann transfer orbit : An orbital maneuver that moves a spacecraft from one circular orbit to another using two engine impulses .
From a circular orbit, thrust applied in a direction opposite to the satellite's motion changes the orbit to an elliptical one; the satellite will descend and reach the lowest orbital point (the periapse) at 180 degrees away from the firing point; then it will ascend back. The period of the resultant orbit will be less than that of the original ...
The Satellite Catalog Number (SATCAT), also known as NORAD Catalog Number, NORAD ID, USSPACECOM object number, is a sequential nine-digit number assigned by the United States Space Command (USSPACECOM), and previously the North American Aerospace Defense Command (NORAD), in the order of launch or discovery to all artificial objects in the orbits of Earth and those that left Earth's orbit. [1]
The ground track moves towards the west 25° each orbit, allowing a different section of the globe to be scanned with each orbit. Most are in Sun-synchronous orbits. A geostationary orbit, at 36,000 km (22,000 mi), allows a satellite to hover over a constant spot on the earth since the orbital period at this altitude is 24 hours. This allows ...
First he took manual control of pitch, reorienting the spacecraft from its "orbit attitude" of 14 degrees nose-down pitch to the retrofire attitude of 34 degrees nose-down pitch, then returning to orbit attitude. He then took manual control of yaw along with pitch, yawing the spacecraft to the left and then to the right to bring it back in line ...
A newer spacecraft, the Lunar Reconnaissance Orbiter (LRO), entered orbit around the Moon on June 23, 2009, and, after testing, it began its photographic mission that September. [10] One of LRO's primary goals is to determine the risk to people working on the surface of the Moon.
Virgin Orbit was a company within the Virgin Group that provided launch services for small satellites. The company was formed in 2017 as a spin-off of Richard Branson 's Virgin Galactic space tourism venture to develop and market the LauncherOne rocket, which had previously been a project under Virgin Galactic.