This document defines and describes synchronous orbits. It begins by defining an orbit generally as the gravitationally curved path of an object around a central point, like a planet orbiting a star. It then defines a synchronous orbit specifically as one where the orbital period of the orbiting body matches the rotational period of the orbited body. Examples given of synchronous orbit types are sun-synchronous orbits, which pass over the same point on Earth at the same solar time each day, and geostationary orbits, which orbit directly above the equator at an altitude of about 36,000 km and match Earth's rotational period. A geostationary satellite is provided as an example of an object in a synchronous orbit employed for communication

1. Synchronous orbit

2. Submitted To :
MD.Sarwar Hosain
Lecturer,
Dept. of ICE
Pabna University of
Science and
Technology, Pabna.
Submitted by :
MD.Khirul Islam
(110601)

3. Contents
• Orbit
• Synchronous orbit
• Types of synchronous
orbit
• Example

4. Orbit
In astrophysics, an orbit is the gravitationally
curved path of an object around a point in
space, for example the orbit of a planet around
the center of a star system, such as the Solar
System. Orbits of planets are typically elliptical.

5. Definition of Synchronous orbit
A synchronous orbit is an orbit where the orbital period
equals the rotation rate of the orbited body.
That is, an orbiting body (usually a satellite) has a period
equal to the average rotational period of the body being
orbited (usually a planet), and in the same direction of
rotation as that body.
So, the synchronous orbit is where the satellite has a
period equal to the average rotational period of the
planet.

6. Orbit types
Synchronous types are :
• Sun-synchronous orbit : An orbit which combines
altitude and inclination(angle between reference place
and orbital plane) in such a way that the satellite passes
over any given point of the earth surface at the same
local solar time.
It orbits at 700-800km altitude over the Earth surface
and always same orientation
• Geostationary orbit : An orbit around the Earth with an
orbital period matching the Earth’s sidereal rotation
period . It lies in the equatorial plane around earth. A
satellite in such an orbit is at an altitude
of approximately 35,786 km .

7. Example
 Synchronous orbits are employed by artificial
satellites used for communication, such as
geostationary satellite . It is synchronous with
respect to earth

8. Thank you