Comet candidates among Quasi-Hilda objects

R. GIL-HUTTON; E. GARCÍA-MIGANI

ASTRONOMY AND ASTROPHYSICS

EDP SCIENCES S A

Lugar: Paris; Año: 2016 vol. 590 p. 1 - 5

0004-6361

Aims. We present the results of a search for quasi-Hilda comets. We wanted to find objects that have recently arrived from the Centaurzone that could became active near the perihelion of their orbits.Methods. Two hundred and seventy-seven objects from the ASTORB database were selected following a dynamical criteria to con-strain the unstable quasi-Hilda region. These objects were integrated backward 50 000 yr in order to identify those that have recentlyarrived from the outer regions of the solar system.Results. The backward integration showed that 11 objects could be Centaurs or transneptunian objects that ended their dynamicalevolution as quasi-Hilda comets. The dynamical evolution of these objects from a statistical point of view was studied by computingthe time-averaged distribution of a number of clones as a function of the aphelion and perihelion distances. All the candidates showa dynamical behavior that is expected for comets injected in the inner solar system from the Centaur or transneptunian regions andreaching the quasi-Hilda region.