RemoteTech users, do you use Signal Delay?

[Gotbread]

In this case, the Vis-viva equation is your friend. GM is known, r is your current distance to the center of the planet (in kerbins case, 100km + 600km = 700km). a is the semimajor axis, simply (ap+pe)/2. In this case, a becomes 1025km. Plugging this in gives an needed velocity of 2577.75 m/s. If you use the formula on your current orbit, you find your orbital speed to be 2246.13 m/s, so you need to burn 331.62 m/s prograde