1. Velocity Extrema in Keplerian Relative Motion: A Gröbner Basis Approach

   • Shawn E. Allgeier
   • Norman G. Fitz-Coy
   • R. Scott Erwin

   Original Article 17 August 2021 Pages: 785 - 804

   

2. Infinitesimal Orbit Dynamics around Equilibrium Points in the Oblate RTBP

   • S. E. Abd El-Bar

   Original Article 27 August 2021 Pages: 805 - 825

   

3. Observation and Maneuver Detection for Cislunar Vehicles

   • Jesse A. Greaves
   • Daniel J. Scheeres

   Original Article Open access 26 October 2021 Pages: 826 - 854

   

4. Time-Varying Shadows of Quasi-Periodic Motion Across Sections of the Flow Within Nearly Time-Periodic Three-Body Dynamics

   • Davide Guzzetti
   • Hexi Baoyin

   Original Article 23 September 2021 Pages: 855 - 890

   

5. Investigation of Stable Regions of Spacecraft Motion in Binary Asteroid Systems by Terminal Condition Maps

   • Xiangyu Li
   • Dong Qiao
   • Feida Jia

   Original Article 15 December 2021 Pages: 891 - 915

   

6. Repetitive Control Compensator Design for Frequency Response near Singularities

   • Pitcha Prasitmeeboon
   • Richard W. Longman

   Original Article 17 August 2021 Pages: 916 - 945

   

7. Specifying Exported Force and Torque Requirements for Precision Pointing Spacecraft

   • Lawrence McGovern

   Original Article 27 August 2021 Pages: 946 - 972

   

8. Trajectory Options for Hera’s Milani CubeSat Around (65803) Didymos

   • Fabio Ferrari
   • Vittorio Franzese
   • Francesco Topputo

   Original Article 03 September 2021 Pages: 973 - 994

   

9. Mission Design for the 2020 Mercury Lander Decadal Survey

   • Jackson L. Shannon
   • Justin A. Atchison
   • Martin T. Ozimek

   Original Article 02 September 2021 Pages: 995 - 1013

   

10. Geostationary Orbit Transfer with Lunar Gravity Assist from Non-equatorial Launch Site

    • Su-Jin Choi
    • John Carrico
    • Sejin Kwon

    Original Article Open access 01 September 2021 Pages: 1014 - 1033

    

11. Deep-Space Optical Navigation for M-ARGO Mission

    • V. Franzese
    • F. Topputo
    • R. Walker

    Original Article Open access 19 October 2021 Pages: 1034 - 1055

    

12. Lunar Crater Identification in Digital Images

    • John A. Christian
    • Harm Derksen
    • Ryan Watkins

    Original Article Open access 21 October 2021 Pages: 1056 - 1144

    

13. Reinforcement Learning for Uncooperative Space Objects Smart Imaging Path-Planning

    • Andrea Brandonisio
    • Michèle Lavagna
    • Davide Guzzetti

    Original Article Open access 02 November 2021 Pages: 1145 - 1169

    

14. Surface Modification of Space Exposed Materials Induced by Low Energetic Proton Irradiation

    • Denise Keil
    • Frederic Seiz
    • Tom Spröwitz

    Original Article Open access 17 August 2021 Pages: 1170 - 1185

    

15. Optical Characterization of DebriSat Fragments in Support of Orbital Debris Environmental Models

    • Heather M. Cowardin
    • John M. Hostetler
    • Corbin L. Cruz

    Original Article Open access 27 October 2021 Pages: 1186 - 1205