University of Oulu

Jiang, Y. & Li, H. (2019). Equilibria and orbits in the dynamical environment of asteroid 22 Kalliope. Open Astronomy, 28(1), pp. 154-164. doi:10.1515/astro-2019-0014

Equilibria and orbits in the dynamical environment of asteroid 22 Kalliope

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Author: Jiang, Yu; Li, Hengnian
Format: article
Version: published version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019102334314
Language: English
Published: De Gruyter, 2019
Publish Date: 2020-09-04
Description:

Abstract

This paper studies the orbital dynamics of the potential of asteroid 22 Kalliope using observational data of the irregular shape. The zero-velocity surface are calculated and showed with different Jacobian values. All five equilibrium points are found, four of them are outside and unstable, and the other one is inside and linearly stable. The movement and bifurcations of equilibrium points during the variety of rotation speed and density of the body are investigated. The Hopf bifurcations occurs during the variety of rotational speed from ω=1.0ω₀ to 0.5ω₀, and the Saddle-Node bifurcation occurs during the variety of rotational speed from ω=1.0ω₀ to 2.0ω₀. Both unstable and stable resonant periodic orbits around Kalliope are coexisting. The perturbation of an unstable periodic orbit shows that the gravitational field of Kalliope is strongly perturbed.

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Series: Open astronomy
ISSN: 2543-6376
ISSN-E: 2543-6376
ISSN-L: 2543-6376
Volume: 28
Issue: 1
Pages: 154 - 164
DOI: 10.1515/astro-2019-0014
OADOI: https://oadoi.org/10.1515/astro-2019-0014
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: This project is funded by National Natural Science Foundation of China (No. 11772356) and Government-Sponsored Overseas Study for Senior Research Scholar, Visiting Scholar, and Postdoctoral Program (CSC No. 201703170036).
Copyright information: © 2019 Yu Jiang et al., published by De Gruyter Open. This work is licensed under the Creative Commons Attribution 4.0 Public License.
  https://creativecommons.org/licenses/by/4.0/