1. Observations of Three Stellar Occultations by Comet Hale–Bopp

   • A. S. Betzler
   • L. B. S. Betzler

   OriginalPaper 13 March 2017 Pages: 1 - 14

   

2. About Tidal Evolution of Quasi-Periodic Orbits of Satellites

   • Sergey V. Ershkov

   OriginalPaper 11 May 2017 Pages: 15 - 30

   

3. Coverage of Mars by Probes Slightly Off the Areostationary Orbit

   • Elena Colella
   • Emiliano Ortore
   • Ennio Condoleo

   BriefCommunication 18 March 2017 Pages: 31 - 39