Refinement of Near Earth Asteroids’ orbital elements via simultaneous measurements by two observers Siegfried Eggl Original Article 27 November 2010 Pages: 211 - 228
Periodic solutions with alternating singularities in the collinear four-body problem Tiancheng OuyangDuokui Yan Original Article 23 December 2010 Pages: 229 - 239
Optimal transfers between unstable periodic orbits using invariant manifolds Kathryn E. DavisRodney L. AndersonGeorge H. Born Original article 12 January 2011 Pages: 241 - 264
Some results on the global dynamics of the regularized restricted three-body problem with dissipation Alessandra CellettiLetizia StefanelliClaude Froeschlé Original Article 07 January 2011 Pages: 265 - 284
Deprit’s reduction of the nodes revisited Luigi ChierchiaGabriella Pinzari Original Article 20 January 2011 Pages: 285 - 301
Analytical investigations of quasi-circular frozen orbits in the Martian gravity field Xiaodong LiuHexi BaoyinXingrui Ma Original Article 07 January 2011 Pages: 303 - 320