5 papers
Massive Star Population in the Sextans A Dwarf Galaxy from HST UV Photometry
Roberto Flores, Elena Fantino, Giuseppina Battaglia +1
We build a catalog of massive (M>M) main sequence stars in the \mbox{metal-poor} (Z) dwarf irregular galaxy Sextans A. HST WFC3 UV photometry in the 2…
Uncontrolled geostationary satellites: mapping periodic transitions to chaos with Lagrangian Descriptors
Roberto Flores, Jerome Daquin, Mauro Pontani +2
Uncontrolled geostationary satellites abandoned near an unstable equilibrium point of the equator experience irregular transitions between dynamical states (continuous circulation,…
Computing Classical Orbital Elements with Improved Efficiency and Accuracy
Roberto Flores, Elena Fantino
This paper reviews the standard algorithm for converting spacecraft state vectors to Keplerian orbital elements with a focus on its computer implementation. It analyzes the shortco…
Direct low-energy trajectories to Near-Earth Objects
Elena Fantino, Roberto Flores, Giuseppe Donnarumma +2
Near-Earth Objects (NEOs) are asteroids, comets and meteoroids in heliocentric orbits with perihelion below 1.3 au. Similarly to the population of the Main Asteroid Belt, NEOs are…
Orbital perturbation coupling of primary oblateness and solar radiation pressure
Martin Lara, Elena Fantino, Roberto Flores
Solar radiation pressure can have a substantial long-term effect on the orbits of high area-to-mass ratio spacecraft, such as solar sails. We present a study of the coupling betwee…