The dynamical evolution and the force model for asteroid (196256) 2003 EH1

Abstract

This paper is devoted to the dynamics of asteroid (196256) 2003 EH1 that belongs to the Amor group. It is known that the asteroid 2003 EH1 is associated with one of the main annual meteor showersthe Quadrantids. In this work we analyze the influence of various perturbing factors on the asteroid motion. The perturbation's estimation was done by five different methods based on the nominal orbit evolution and the size of the initial confidence region. The most significant influences on the dynamical evolution of 2003 EH1 are gravitational forces from the Sun, major planets and the Moon, and the relativistic effects (RE) of the Sun. Of less importance are the Earth, the Sun and Jupiter oblateness; gravitational perturbations from Pallas, Ceres, Vesta and Pluto; and the RE of planets, the Moon, and Pluto.The researches of chaoticity and evolution of asteroid 2003 EH1 were examined by integrating its motion equations along with 500 clones. The time interval (1000-4000 years) has been determined by integration precision estimation. We calculated the mean exponential growth factor of nearby orbits (MEGNO) and found that MEGNO < 2 only in the interval 1700-2300. After 2300 year the MEGNO parameter increases that indicates motion instability. It shows that the orbit may be considered as regular on the time interval of ±300 years from now, and as chaotic outside this interval. The reason, as we suppose, is frequent close approaches of the asteroid with Jupiter and the overlap of apsidal-nodal resonances.

Analysis of the dynamical evolution of the Quadrantid meteoroid stream

“…The orbital evolution of the asteroid (196256) 2003 EH1 has been studied by many authors, most recently by Kaˇnuchová and Neslušan (2007), Kholshevnikov et al (2016), Galushina et al (2017). Numerical integration of motion equations of the asteroid 2003EH1 and its 500 clones (Williams et al, 2004b;Galushina et al, 2017) showed that the orbits of the clones due to multiple close encounters with the planets, move away from the nominal orbit very quickly, which confirms the above. Consequently, in case of Quadrantid, any initial structure will be lost very quickly.…”

“…In this paper, we have presented one of the possible scenarios for the dynamical evolution of the meteoroid stream formed by the asteroid (196256) 2003 EH1. Our analysis of the dynamics of meteoroid particles assumed to be released from the near-Earth asteroid (196256) 2003 EH1 revealed the complicated dynamical structure of its meteoroid stream, which approaches Jupiter's and Earth's orbits. Meteoroids inherit the dynamic properties of the asteroid but not all.…”

“…The core of the Quadrantid is only 200-300 years old and is associated with asteroid (196256) 2003 EH1 (Abedin et al, 2015), while the wide part of the stream is connected with comet 96P/Machholz (Hasegawa, 1979, Abedin et al, 2018. The age and formation mechanism of the Quadrantid meteoroid stream core and the relationship with the asteroid (196256) 2003 EH1 have been studied previously by several authors (Jenniskens, 2004;Williams et al, 2004a;Wiegert & Brown, 2005;Abedin et al, 2015).…”

Mean Motion and Secular Resonances in the Motion of Near-Earth Asteroids

“…Методика выявления вековых резонансов подробно описана в работах [12,13]. Рассмотрим здесь основные понятия.…”

A Deep Search for Emission From "Rock Comet" (3200) Phaethon At 1 AU

“…∼ 1 au). ( 3552) Don Quixote, for example, has displayed recurrent activity from 1.23-2.72 au (Mommert et al 2014;Mommert et al 2020);(196256) 2003 EH 1 , associated with the Quadrantid meteor shower, might have been active when its perihelion distance was ∼ 1 au (Jenniskens 2004;Abedin et al 2015;Galushina & Sambarov 2017). If Phaethon exhibits activity at 0.14 au, it will point to a mechanism different than the one that drives its near-perihelion activity.…”