The average time of revolution of the Soviet ship - satel - nick Vostok in which Yuri Gagarin flew around the Earth globe for the first time in April 12, 1961, was `T_(1)=89` minutes, with an average altitude above ground `h=254` km. The closest satellite of Mars. Phobos -oribiting the platnet during `T_(2)=7` hours 39 minutes, while the center of Mars is on average distance of `R_(2)=9350` km from Phobos. Determine approximately `(M_(1))/(3M_(2))` where `M_(2)` is mass of Mars and `M_(1)` is mass of the Earth. It is given that the average radius of the earth `R=6371k`.