1. Closed solution of the Hill differential equation for short arcs and a local mass anomaly in the central body

   • Markus Antoni
   • Wolfgang Keller

   Original Article 01 December 2012 Pages: 107 - 121

2. Planetary orbital equations in externally-perturbed systems: position and velocity-dependent forces

   • Dimitri Veras
   • N. Wyn Evans

   Original Article 25 November 2012 Pages: 123 - 141

3. Optimal starters for solving the elliptic Kepler’s equation

   • M. Calvo
   • A. Elipe
   • L. Rández

   Original Article 23 November 2012 Pages: 143 - 160

4. 2/1 resonant periodic orbits in three dimensional planetary systems

   • K. I. Antoniadou
   • G. Voyatzis

   Original Article 20 January 2013 Pages: 161 - 184

5. A note on the dynamics around the Lagrange collinear points of the Earth–Moon system in a complete Solar System model

   • Yijun Lian
   • Gerard Gómez
   • Guojian Tang

   Original Article 20 January 2013 Pages: 185 - 211

6. Nader Haghighipour: Planets in binary star systems

   • Tatiana A. Michtchenko

   Book review 30 January 2013 Pages: 213 - 214