Ballistic capture

In the ideal case, the transfer is ballistic (requiring zero Delta-v) after launch.

A requirement for the spacecraft to carry fuel adds to its cost and complexity.

[2] Ballistic capture was first used by the Japanese spacecraft Hiten in 1991 as a method to get to the Moon.

The region about a target body where ballistic capture occurs is called a weak stability boundary.

[6] It can be performed anytime, not only once per 26 months as in other maneuvers and does not involve dangerous and expensive (fuel cost) braking.

The trajectory of KPLO ( Danuri ) between Earth, Lagrange point #1 , and Moon
Animation of BepiColombo 's trajectory from 20 October 2018 to 2 November 2025
BepiColombo · Earth · Venus · Mercury · Sun
For more detailed animation, see this video