Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will

The kinetic energies of a planet in an elliptical orbit about the Sun, at positions $A, B$ and $C$ are $K_A, K_B$ and $K_C$ respectively. $AC$ is the major axis and $SB$ is perpendicular to $AB$ at the position of the Sun $S$ as shown in the figure. Then

What is the minimum energy required to launch a satellite of mass $\mathrm{m}$ from the surface of a planet of mass  $\mathrm{M}$ and radius $\mathrm{R}$ in a circular orbit at an altitude of $2\mathrm{R}?$