The Hungaria Asteroids: close encounters and impacts with terrestrial planets
- Autor(en)
- Mattia Galiazzo, Akos Bazso, Rudolf Dvorak
- Abstrakt
The Hungaria asteroid family (Named after (434) Hungaria), which consists of more than 5000 members with semi-major axes between 1.78 and 2.03 AU and have inclinations of the order of 20°, is regarded as one source for Near-Earth Asteroids (NEAs). They are mainly perturbed by Jupiter and Mars, and are ejected because of mean motion and secular resonances with these planets and then become Mars-crossers; later they may even cross the orbits of Earth and Venus. We are interested to analyze the close encounters and possible impacts with these planets. For 200 selected objects which are on the edge of the group we integrated their orbits over 100 million years in a simplified model of the planetary system (Mars to Saturn) subject to only gravitational forces. We picked out a sample of 11 objects (each with 50 clones) with large variations in semi-major axis and some of them achieve high inclinations and eccentricities in connection with mean motion and secular resonances which then leads to relatively high velocity impacts on Venus, Earth and Mars. We report all close encounters and impacts with the terrestrial planets and statistically determine the mean life and the orbital distribution of the NEAs of these Hungarias.
- Organisation(en)
- Institut für Astrophysik
- Journal
- Memorie Societa Astronomica Italiana
- Band
- 26
- Seiten
- 38-46
- Anzahl der Seiten
- 9
- ISSN
- 0037-8720
- Publikationsdatum
- 2014
- Peer-reviewed
- Ja
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Astronomy and Astrophysics, Instrumentation, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Radiology Nuclear Medicine and imaging
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/7c32665e-4398-4055-9b1e-1b03e2259505