tides (Scheirich et al. \[2015\]. Icarus 245, 56-63), we now have three distinct cases of well observed binary asteroid systems with their long-term dynamical models inferred. That indicates a presence of all the three states of the mutual orbit evolution – equilibrium, expanding and contracting – in the population of near-Earth binary asteroids.
address:
- 'Astronomical Institute, Academy of Sciences of the Czech Republic, Fričova 1, CZ-25165 Ondřejov, Czech Republic'
- 'Department of Aerospace Engineering Sciences, The University of Colorado at Boulder, Boulder, CO, USA'
- 'Sugarloaf Mountain Observatory, South Deerfield, MA, USA'
- 'Modra Observatory, Department of Astronomy, Physics of the Earth, and Meteorology, FMPI UK, Bratislava SK-84248, Slovakia'
- 'Institute of Astronomy of Kharkiv National University, Sumska Str. 35, Kharkiv 61022, Ukraine'
- 'Lowell Observatory, 1400 W Mars Hill Road, Flagstaff, AZ 86001, USA'
- 'Lunar and Planetary Laboratory, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721, USA'
- 'U.S. Naval Academy, Annapolis, MD, USA'
- 'Sonoita Research Observatory, 77 Paint Trail, Sonoita, AZ 85637, USA'
- 'Deptartment of Space Studies, Southwest Research Institute, Boulder, CO 80302, USA'
- 'Ulugh Beg Astronomical Institute, Astronomicheskaya Street33, 100052 Tashkent, Uzbekistan'
- 'Shed of Science South Observatory, Pontotoc, TX, 