Kerbal Space Program

1) achieve escape orbit
2) attempt to place maneuver node near SoI switch- either entry or exit.

expected: can create maneuver node at any point on orbit
result: cannot place maneuver node far from periapsis

3) create manuever node at periapsis
4) attempt to drag maneuver node out to SoI switch

expected: maneuver node can be dragged to any point
result: node can be created near periapsis, however maneuver node turns brown then gets deleted when dragged to where the orbit line's curve becomes almost straight

hypothesis: maneuver nodes are being defined by True Anomaly which becomes extremely exponential, then undefined along the hyperbolic asymptotes
fix: maneuver nodes should be defined according to Time until/since Periapsis for parabolic & hyperbolic orbits

possibly related: #1676 and #831