Closest approach markers flashing??

[Bar2215]

Hello, so today I wanted to do a Duna mission but when I want to do my interplanetary burn, The closest approach markers constantly jump around and I can't get my encounter.(e.g. whenever they are close to each other they move) and when I do get an encounter, the burn isn't right and I end up not getting one. Do you know what the problem is? Thanks in advance!

[Grogs]

1 hour ago, Bar2215 said:

Hello, so today I wanted to do a Duna mission but when I want to do my interplanetary burn, The closest approach markers constantly jump around and I can't get my encounter.(e.g. whenever they are close to each other they move) and when I do get an encounter, the burn isn't right and I end up not getting one. Do you know what the problem is? Thanks in advance!

I've found that flashing markers usually indicate it's on a later orbit. So you've probably plotted a course that will take you between Kerbin and Duna orbit, but won't actually get you near the planet until the 2nd (or more) pass of Duna's orbit.

 

Hope you packed a lot of snacks!