1. Stability and bifurcations of even periodic orbits in the Sitnikov problem

   • Jorge Galán-Vioque
   • Daniel Nuñez
   • Camila Riccio

   Original Article 19 December 2018 Article: 82

   

2. Jean Kovalevsky (1929–2018)

   • Sylvio Ferraz-Mello

   News 17 December 2018 Article: 81

   

3. Initial orbit determination using Doppler shift of Fraunhofer lines

   • Brett Pantalone
   • Michael W. Kudenov

   Original Article 17 December 2018 Article: 80

   

4. Creation of a synthetic population of space debris to reduce discrepancies between simulation and observations

   • Alexis Petit
   • Daniel Casanova
   • Anne Lemaître

   Original Article 14 December 2018 Article: 79

   

5. Tidal synchronization of close-in satellites and exoplanets. III. Tidal dissipation revisited and application to Enceladus

   • H. A. Folonier
   • S. Ferraz-Mello
   • E. Andrade-Ines

   Original Article 06 December 2018 Article: 78