Which statement about geosynchronous orbits is accurate?

• A. It has an orbital period equal to Earth's rotation period; it may be inclined and non-circular, and may be geosynchronous but not necessarily stationary.
• B. It requires the orbit to be equatorial and circular.
• C. It is always a sun-synchronous orbit.
• D. It is identical to a geostationary orbit.

Answer: (A)

Geosynchronous means the satellite’s orbital period exactly matches Earth’s rotation, about 23 hours 56 minutes. That alignment makes the satellite come back to the same position in the sky after one sidereal day, but it doesn’t require staying over one fixed ground point. If the orbit is inclined, the ground track isn’t stationary—it can trace a figure-eight pattern. If the orbit is equatorial and circular, it can stay fixed over one location, which is the special case known as a geostationary orbit. So the statement that the period matches Earth’s rotation and that the orbit can be inclined and non-circular, with geosynchronous but not necessarily stationary, is correct. Sun-synchronous orbits are a different design criterion tied to nodal precession, not to matching Earth’s rotation, and geostationary is just a specific geosynchronous case with zero inclination (and circular).