Open AccessOrbits of the Irregular Satellites of Uranus and Neptune
Author(s) -
M. Brozović,
R. A. Jacobson
Publication year - 2022
Publication title -
the astronomical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.61
H-Index - 271
eISSN - 1538-3881
pISSN - 0004-6256
DOI - 10.3847/1538-3881/ac617f
Subject(s) - uranus , astrometry , ephemeris , neptune , physics , astronomy , orbital elements , nice model , natural satellite , celestial mechanics , planet , satellite , planetary system , stars , planetary migration
We report on an ephemerides update for the irregular satellites of Uranus and Neptune, including Nereid. Our data set contains ground-based and Voyager 2 position measurements of the satellites. Some of the new observations were reduced with respect to the GAIA star catalog and represent high-quality, modern astrometry. The orbital fits are based on the numerically integrated equations of motion. We summarized results in terms of state vectors, orbital uncertainties, and mean elements. A large number of the irregulars have not been followed up in over a decade, and our study shows that their orbits still contain significant uncertainties.