A communication satellite is in a cereostationary (Ceres-stationary) orbit at an altitude of 240 km above the surface of the dwarf planet Ceres. Ceres has a mean radius of 470 km and a rotational period of 9.07 hours9.07\text{ hours}9.07 hours.
What is the orbital speed of the satellite relative to the centre of Ceres?
22 m s−122\text{ m s}^{-1}22 m s−1
46 m s−146\text{ m s}^{-1}46 m s−1
90 m s−190\text{ m s}^{-1}90 m s−1
140 m s−1140\text{ m s}^{-1}140 m s−1
