I am trying to reach cyclero with a craft of mine (on my phone). Whenever I get an encounter it shows every time 77.423km. whenever I try to move it a bit I systematically lose the approach for bigger distance (it's like using the gizmo does not change distance then suddenly it does). As a consequence I can't get a closer approach, even by making several nodes to adjust and I can't get to Cyclero as burning close costs too much. Is there a way to correct that?
turning down the burn gizmo sensitivity allows more precision
change the craft's derivative to near maximum, so it will prevent the automatic burn from overshooting
i don't know the maths at the moment, but you can try aerobraking to at least an eccentric orbit without using up all your fuel trying to slow down