An advanced multipole model of the (130) Elektra quadruple system

0576739 - ASÚ 2024 RIV FR eng J - Journal Article
Fuksa, M. - Broz, M. - Hanuš, J. - Ferrais, M. - Fatka, Petr - Vernazza, P.
An advanced multipole model of the (130) Elektra quadruple system.
Astronomy & Astrophysics. Roč. 677, September (2023), č. článku A189. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) Ga21-11058S
Institutional support: RVO:67985815
Keywords : minor planets * asteroids * planets and satellites
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 6.5, year: 2022
Method of publishing: Open access

We aim to characterise the irregular shape of Elektra and construct a complete orbital model of its unique moon system. We applied the All-Data Asteroid Modelling (ADAM) algorithm to 60 light curves of Elektra, including our new measurements, 46 adaptive-optics (AO) images obtained by the VLT/SPHERE and Keck/Nirc2 instruments, and two stellar occultation profiles. For the orbital model, we used an advanced N-body integrator, which includes a multipole expansion of the central body (with terms up to the order ℓ = 6), mutual perturbations, internal tides, and the external tide of the Sun acting on the orbits. We fitted the astrometry measured with respect to the central body and also relatively, with respect to the moons themselves.
Permanent Link: https://hdl.handle.net/11104/0346159