Hy. ATM i started to add some satellites on kerbin orbit ( second attempt , first one ended up with a big de-sync only after 3 day's) . I want to keep them sync. with each other ( i have 4 ) , they are almost on the same orbit. Two of them have a 0.15s orbital period difference one of them 1s difference and the last one has a + 10s difference. Now is this close enought to keep them almost on the same formation for a time , well maybe the last one with +10s will be a problem? And is there any approximative value to keep them in place , i think under one secound is fine ( it will take very much time to drift a significant distance ) , but what about 10s ? Also i tried to search some formula to calculate the drift distance in time but with no luck , i mean i know that the orbital period is X , i have a Y difference and the current distance between them is 2Mm so let's say i want to know the drift distance after 5 day's ? As an example it will give me 2.01Mm so i know that in 5 day's i will have a 0.01Mm drift distance. Thx.