1. Semi-analytical model for third-body perturbations including the inclination and eccentricity of the perturbing body

   • Tao Nie
   • Pini Gurfil
   • Shijie Zhang

   Original Article 12 June 2019 Article: 29

   

2. A lower bound of the distance between two elliptic orbits

   • Denis V. Mikryukov
   • Roman V. Baluev

   Original Article 12 June 2019 Article: 28

   

3. Are the analytical proper elements of asteroids still needed?

   • Zoran Knežević
   • Andrea Milani

   Original Article 05 June 2019 Article: 27

   

4. Study of the roto-orbital motion using intermediaries: numerical experiments

   • Josué Cardoso dos Santos
   • Sebastián Ferrer
   • Daniel J. Scheeres

   Original Article 03 June 2019 Article: 26

   

5. Symplectic propagators for the Kepler problem with time-dependent mass

   • Philipp Bader
   • Sergio Blanes
   • Nikita Kopylov

   Original Article 30 May 2019 Article: 25

   

6. A search for triple collision orbits inside the domain of the free-fall three-body problem

   • Kiyotaka Tanikawa
   • Masaya M. Saito
   • Seppo Mikkola

   Original Article 29 May 2019 Article: 24

   

7. Spatial unstable periodic quasi-satellite orbits and their applications to spacecraft trajectories

   • Kenta Oshima
   • Tomohiro Yanao

   Original Article 28 May 2019 Article: 23