Discovery of the Closest Saturnian Irregular Moon, S/2019 S 1, and Implications for the Direct/Retrograde Satellite Ratio

@article{Ashton2022DiscoveryOT,
  title={Discovery of the Closest Saturnian Irregular Moon, S/2019 S 1, and Implications for the Direct/Retrograde Satellite Ratio},
  author={Edward Ashton and Brett J. Gladman and Matthew Beaudoin and Mike Alexandersen and J. M. Petit},
  journal={The Planetary Science Journal},
  year={2022},
  volume={3}
}
We present a tracked orbit for a recently discovered 25th magnitude irregular moon of Saturn, using Canada-France-Hawaii Telescope imaging. Our 2 yr of observational arc on the moon leads to an orbit with a semimajor axis of 11.2 million kilometers and an inclination of 44 deg. This makes it one of the smallest Saturnian irregular moon orbits known and puts the moon in the Inuit group. This moon is also a magnitude brighter than the faintest known Saturnian irregulars. We show that the moon’s… 

References

SHOWING 1-7 OF 7 REFERENCES
Discovery of two distant irregular moons of Uranus
The systems of satellites and rings surrounding the giant planets in the Solar System have remarkably similar architectures. Closest to each planet are rings with associated moonlets, then larger
An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness
We present a deep optical survey of Uranus's Hill sphere for small satellites. The 8 m Subaru Telescope was used to survey about 3.5 square degrees with a 50% detection efficiency at limiting red
Irregular Satellites in the Context of Planet Formation
All four giant planets in the solar system possess irregular satellites, characterized by large, highly eccentric and/or highly inclined orbits. These bodies were likely captured from heliocentric
Orbital and Collisional Evolution of the Irregular Satellites
The irregular moons of the Jovian planets are a puzzling part of the solar system inventory. Unlike regular satellites, the irregular moons revolve around planets at large distances in tilted and
2018, in Enceladus and the Icy
  • 2018
Tucson, AZ: Univ
  • 2005
Tucson, AZ: Univ
  • Natur,
  • 2001