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42 papers · 1 filter
Connecting Earth and Moon via the L1 Lagrangian point
A. K. de Almeida, V. M. de Oliveira, T. Vaillant +4
The renewed global interest in lunar exploration requires new orbital strategies to ensure flight safety which can benefit extended lunar missions and service a plethora of planned…
Action Research in Astronomy and Ecology: The observatory of the night environment in Grenoble
Julien Milli, Merlin Boribon, Fabien Malbet +4
We present an example of low-carbon research activity carried out by astrophysicists and focused on ecology and environmental protection, with direct impacts on territories and soc…
Tangent Velocity constraint for orbital maneuvers with Theory of Functional Connections
A. K. de Almeida, T. Vaillant, V. M. de Oliveira +9
Maneuvering a spacecraft in the cislunar space is a complex problem, since it is highly perturbed by the gravitational influence of both the Earth and the Moon, and possibly also t…
Astrometry via Close Approach Events: Applications to Main-Belt Asteroid (702) Alauda
B. F. Guo, Q. Y. Peng, A. Vienne +1
The release of Gaia catalog is revolutionary to the astronomy of solar system objects. After some effects such as atmospheric refraction and CCD geometric distortion have been take…
Theory of Functional Connections and Nelder-Mead optimization methods applied in satellite characterization
Allan Kardec de Almeida Junior, Safwan Aljbaae, Timothée Vaillant +10
The growing population of man-made objects with the build up of mega-constellations not only increases the potential danger to all space vehicles and in-space infrastructures (incl…
Reversible time-step adaptation for the integration of few-body systems
Tjarda C. N. Boekholt, Timothee Vaillant, Alexandre C. M. Correia
The time step criterion plays a crucial role in direct N-body codes. If not chosen carefully, it will cause a secular drift in the energy error. Shared, adaptive time step criteria…