A new approach on the long term dynamics of neo's under Yarkorsky effect

To calculate the force associated with the Yarkovsky effect the temperature distribution on the surface of the asteroid should be determined; it depends on the asteroid orbit, size and shape, spin axis orientation and period, mass, density of surface layers, albedo, thermal conductivity, capacity and IR emissivity of the material. The uncertainty of many of these parameters invites to develop simplified methods to calculate the influence of the Yarkovsky effect on long term dynamics of asteroids. In this paper we present one of this method based in a special perturbation procedure developed in our group.

Earth Delivery of a Small NEO with an Ion Beam Shepherd

The possibility of capturing a small Near Earth Asteroid (NEA) and deliver it to the vicinity of the Earth has been recently explored by different authors. The key advantage would be to allow a cheap and quick access to the NEA for science, resource utilization and other purposes. Among the different challenges related to this operation stands the difficulty of robotically capturing the object, whose composition and dynamical state could be problematic. In order to simplify the capture operation we propose the use of a collimated ion beam ejected from a hovering spacecraft in order to maneuver the object without direct physical contact. The feasibility of a possible asteroid retrieval mission is evaluated.

Fernández del Amo. Compromiso social desde el Arte Contemporáneo

La figura de José Luis Fernández del Amo es importante porque unido a su obra arquitectónica, va indisolublemente asociada su labor como impulsor de la renovación y difusión de las artes plásticas. Su legado es este compromiso con el arte y la arquitectura propios de la época en la que se vive, y que ambos sirvan a la sociedad. Se analizan dos de sus obras, la intervención en uno de los patios de la Biblioteca Nacional para albergar la Sala de Exposiciones del Museo de Arte Contemporáneo, y la Parroquia de Nuestra Señora de la Luz, en Madrid.