Some Earth-Moon NRHOs. From Williams et al, 2017. I have mentioned the Circular Restricted Three-Body Problem (CR3BP) here a couple of times. Another type of periodic CR3BP orbit is the "near rectilinear" halo orbit (NRHO). These orbits are just the continuation of the family of "normal" halo orbits until they …| Degenerate Conic
There are a lot of classic Fortran libraries from the 1970s to the early 1990s whose names end in "pack" (or, more specifically, "PACK"). I presume this stands for "package", and it seems to have been a common nomenclature for software libraries back in the day. Here is a list …| Degenerate Conic