A satellite of mass 1000 kg is launched to revolve around the earth in an orbit at a height of 270 km from the earth's surface. Kinetic energy of the satellite in this orbit is $\_\_\_\_$ $\times 10^{10} J$.
(Mass of earth $=6 \times 10^{24} \mathrm{~kg}$, Radius of earth $=6.4 \times 10^{6} \mathrm{~m}$, Gravitational constant $=6.67 \times 10^{-11} N m^{2} k g^{-2}$ )