Gravitation: JEE Main 2026 Physics question

Initially a satellite of 100 kg is in a circular orbit of radius $1.5R_E$. This satellite can be moved to a circular orbit of radius $3R_E$ by supplying $\alpha\times10^6$ J of energy. The value of $\alpha$ is ______. (Take Radius of Earth $R_E=6\times10^6$ m and $g=10$ m/s$^2$)