Artificial halo orbits for low-thrust propulsion spacecraft Shahid BaigColin R. McInnes Original Article 04 July 2009 Pages: 321 - 335
Attitude stability of artificial satellites subject to gravity gradient torque Rodolpho Vilhena de MoraesRegina Elaine Santos CabetteJorge Kennety Formiga Original Article 05 July 2009 Pages: 337 - 353
A complex exponential solution to the unified two-body problem Troy A. HendersonJohn L. JunkinsGianmarco Radice Original Article 14 July 2009 Pages: 355 - 368
Central configurations of the five-body problem with equal masses Tsung-Lin LeeManuele Santoprete Original Article 09 July 2009 Pages: 369 - 381
A web of secondary resonances for large A/m geostationary debris A. LemaƮtreN. DelsateS. Valk Original Article 08 July 2009 Pages: 383 - 402
Michael Perryman: Astronomical applications of Astrometry: Ten years of exploitation of the Hipparcos satellite data Jean Kovalevsky Book Review 17 July 2009 Pages: 403 - 405