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: 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: Irregular satellites; Saturnian satellites; Natural satellites (Solar system); Saturn; [SDU]Sciences of the Universe [physics]; Canada; inuit
• Online Access: https://hal-insu.archives-ouvertes.fr/insu-03712671; https://hal-insu.archives-ouvertes.fr/insu-03712671/document; https://hal-insu.archives-ouvertes.fr/insu-03712671/file/Ashton_2022_Planet._Sci._J._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...