Photo of Roshan Thomas Eapen

Roshan Thomas Eapen

Assistant Professor


  • Aerospace Engineering

233B Hammond Building





  • Bachelor of Technology, Aerospace Engineering, Karunya University, 2014
  • Master of Science, Aeronautics and Astronautics, Purdue University, 2017
  • Doctor of Philosophy, Aerospace Engineering, Texas A&M University, 2021


Journal Articles

  • Roshan Thomas Eapen, Kathleen C Howell and Kyle T Alfriend, 2021, "Zero Momentum Maps and Transport Mechanisms in the Planar Circular Restricted Three-Body Problem.", Journal of Astronautical Sciences
  • Roshan Thomas Eapen, Manoranjan Majji and Kyle T Alfriend, 2021, "Attitude dynamics of a rigid body in Keplerian motion", Celestial Mechanics and Dynamical Astronomy, 133, (1), pp. 1--25
  • Roshan Thomas Eapen and Carolin Frueh, 2018, "Averaged solar radiation pressure modeling for high area-to-mass ratio objects in geosynchronous orbits", Advances in Space Research, 62, (1), pp. 127--141
  • Roshan Thomas Eapen and Ram Krishan Sharma, 2014, "A study of halo orbits at the Sun--Mars L1 Lagrangian point in the photogravitational restricted three-body problem", Astrophysics and Space Science, 352, (2), pp. 437--441
  • Roshan Thomas Eapen and Ram Krishan Sharma, 2014, "Mars interplanetary trajectory design via Lagrangian points", Astrophysics and Space science, 353, (1), pp. 65--71

Conference Proceedings

  • Zach Hall, David Schwab, Roshan Thomas Eapen and Puneet Singla, 2022, "Reachability-Based Approach for Search and Detection of Maneuvering Cislunar Objects", pp. 0853
  • Andrew Verras, Roshan Thomas Eapen, Andrew B Simon, Manoranjan Majji, Ramchander Rao Bhaskara, Carolina I Restrepo and Ronney Lovelace, 2021, "Vision and Inertial Sensor Fusion for Terrain Relative Navigation", pp. 0646
  • R.T. Eapen, M Majji, K. T. Alfriend and Puneet Singla, 2020, "Semi-Analytic solutions to the Hamilton Jacobi Equation with Applications to Orbit Propagation in Perturbed Two-Body Regimes"
  • R.T. Eapen, M Majji and K. T. Alfriend, 2019, "Extended Phase-Space Realization for Attitude Dynamics of an Axisymmetric Body in Eccentric Orbit"
  • R.T. Eapen, M Majji and K. T. Alfriend, 2018, "Equilibria Associated with the Attitude Dynamics of a Rigid Body in Keplerian Motion"


  • Roshan Thomas Eapen, 2017, "Averaged Solar Radiation Pressure Modeling for High Area-to-Mass Ratio Objects in Geostationary Space"

Research Projects

Honors and Awards

  • Heep Graduate Fellowship, Hagler Institude of Advanced Studies, June 2020 - May 2021
  • Aerospace Travel Grant, Aerospace Engineering, Texas A&M University, College Station, August 2018
  • J.N. Tata Scholar, The Jamsetji Nusserwanji Tata Endowment for Higher Education of Indians, September 2015 - May 2017
  • Best Paper Award, 18 th National Space Science Symposium, Indian Space Research Organization., January 2014


Service to Penn State:

Service to External Organizations:

  • Organizing Conferences and Service on Conference Committees, Committee Member, Spaceflight Mechanics Technical Administrative Subcommittee, AAS, Technical Administrative Subcommittee, January 2022 - January 2027
  • Organizing Conferences and Service on Conference Committees, Reviewer, Associate Editpr, American Control Conference 2022, September 2021



The Penn State Department of Aerospace Engineering, established in 1961 and the only aerospace engineering department in Pennsylvania, is consistently recognized as one of the top aerospace engineering departments in the nation, and is also an international leader in aerospace education, research, and engagement. Our undergraduate program is ranked 15th and our graduate programs are ranked 15th nationally by U.S. News & World Report, while one in 25 holders of a B.S. degree in aerospace engineering in the U.S. earned it from Penn State. Our students are consistently among the most highly recruited by industry, government, and graduate schools nationwide.

The department is built upon the fundamentals of academic integrity, innovation in research, and commitment to the advancement of industry. Through an innovative curriculum and world-class instruction that reflects current industry practice and embraces future trends, Penn State Aerospace Engineering graduates emerge as broadly educated, technically sound aerospace engineers who will become future leaders in a critical industry

Department of Aerospace Engineering

229 Hammond Building

The Pennsylvania State University

University Park, PA 16802

Phone: 814-865-2569