12. Archived. Its 0° inclination and its eccentricity of 0 cause its ground track to be only a point: a satellite in this orbit has no motion relative to the body's surface. Communication to a satellite in a stationary orbit is easier than if it was in another orbit, as the ground based antennae do not have to move to account for the satellite's motion relative to the orbited body. You need to match your orbital period with sidereal rotation period not the solar day. ∘ A Molniya orbit is a semi-synchronous, highly elliptical orbit. For example, a super-synchronous orbit has f=1/2 so a payload could be dropped every two sidereal days or, when orbiting Kerbin, one every twelve hours. It's important to note that, although the name implies it, the orbit is not synchronous around the Sun. An example of a semi-synchronous orbit for real world scientific applications is a Molniya orbit. The inverse factor f (= 1/f) defines how many days are between two detachments. 3. One advantage of a synchronous orbit is that they allow dropping multiple payloads from one craft, because the orbit will periodically travel above the same point on the body's surface. Usually, the orbit has a large eccentricity so that the payload has to complete a minimal amount of maneuvers to reach the surface. The basic maneuver plan for reaching this orbit is to first achieve a low Kerbin orbit (LKO) and then perform two maneuvers to execute a Hohmann transfer. Geostationary Orbit. The first one, called the periapsis maneuver, is raising the apoapsis to the required altitude for a synchronous orbit. Moho is the only planet without any possibilities for a craft to achieve a synchronous orbit because of its very slow rotational period; Moho completes approximately two rotations during the time it takes for an object in the highest possible orbit to complete a revolution. apoapsis). {\displaystyle 120^{\circ }} Depending on the required orbit the second burn also includes nearly all of the plane change to reduce the equatorial inclination to zero. When dropping numerous payloads that should land nearby each other, the orbit should be an integer multiple of the celestial body's sidereal day. For Kerbin, that equate to 70k for PE, 3117k for AP, and around 63 degree inclination. Since it is impossible to get all orbital values exact for a stationary orbit, satellites in stationary orbits form small analemmata. Some celestial bodies don't allow for synchronous orbits because the altitude required to sync… When the second orbit is a semi-synchronous orbit this quotient is 2: An orbit where the orbital period is lower than the rotational period has some advantages, as some bodies don't allow synchronous orbits but opportunities for semi-synchronous orbits. When the orbital period is half as long as the rotational period, the orbit is usually described as semi-synchronous. … Why would the numbers be different? This way, the body stays the same relative to the orbit and has the same descent route, if each payload is detached at the same point in the orbit (e.g. Español - Latinoamérica (Spanish - Latin America), http://wiki.kerbalspaceprogram.com/wiki/Kerbin#Orbits, http://steamcommunity.com/sharedfiles/filedetails/?id=575321399&fileuploadsuccess=1, https://en.wikipedia.org/wiki/Standard_gravitational_parameter, http://wiki.kerbalspaceprogram.com/wiki/Kerbin, https://en.wikipedia.org/wiki/Geostationary_orbit. Stationary orbits are a special kind of synchronous orbit. I have questions surrounding getting into Geostationary Orbit, 1. Surely you want a perfectly circular orbit? Hello everyone. The longitudes of the ascending nodes can also be spaced out by 2 Stationary orbitsare a special kind of synchronous orbit. It is possible to calculate the semi-major axis of a semi-synchronous orbit using Kepler's third law of planetary motion. All rights reserved. you only need to calculate it if you are into that sort of stuff, otherwise just take it from the wiki. Since it is impossible to get all orbital values exact for a stationary orbit, satellites in stationary orbits form small analemmata. . Tidally locked moons don't have synchronous orbit possibilities either because of their slow rotation. 120 or Its 0° inclination and its eccentricity of 0 cause its ground track to be only a point: a satellite in this orbit has no motion relative to the body's surface. This page was last edited on 23 February 2019, at 03:15. Calculate the resonant orbit needed for a carrier craft to inject craft it carries, like satellites, into equidistant positions of a shared circular orbit. I know the Geostationary orbit for Kerbin is 2,868.400 but have no idea about all the others. In this case the payload is detached at the apoapsis and decelerated such that it lands on the celestial body. All trademarks are property of their respective owners in the US and other countries.

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