@Overengineer1 created this little mod which makes it much easier to visualize positions. The original thread is here: http://forum.kerbalspaceprogram.com/index.php?/topic/128952-105-kerbal-slingshotter-visualize-ship-and-all-planetmoon-positions-at-a-selected-time/&
The new version for KSP 1.4.1 has new dependencies
Click Through Blocker
CKAN has been updated to install the dependencies, if needed.
This is a very simple K