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

• Published in: The Planetary Science Journal
• Main Authors: Ashton, Edward, Gladman, Brett, Beaudoin, Matthew, Alexandersen, Mike, Petit, Jean-Marc
• Other Authors: University of British Columbia (UBC), Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213) (UTINAM), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté COMUE (UBFC)-Université Bourgogne Franche-Comté COMUE (UBFC)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2022
• Subjects: [PHYS.ASTR.EP]Physics [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]; Canada; Saturn; inuit
• Online Access: https://hal.science/hal-03752464; https://hal.science/hal-03752464/document; https://hal.science/hal-03752464/file/Ashton-etal_2022_PSJ_3_107.pdf; https://doi.org/10.3847/psj/ac64a2

International audience 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...