estimate, as both moons are very irregular, with angular dimensions of 76.9 x 38.5 to 77.8 x 38.9 arcseconds for Styx, and 67.6 x 32.0 to 68.0 x 32.2 for Kerberos. As such, Styx has no annular eclipses, its widest axis being more than 10 arcseconds larger than the Sun at its largest. However, Kerberos, although slightly larger, cannot make total eclipses as its largest minor axis is a mere 32 arcseconds. Eclipses by Kerberos and Styx will entirely consist of partial and hybrid eclipses, with total eclipses being extremely rare. The next period of mutual events due to Charon will begin in October 2103, peak in 2110, and end in January 2117. During this period, solar eclipses will occur once each Plutonian day, with a maximum duration of 90 minutes. Exploration The Pluto system was visited by the New Horizons spacecraft in July 2015. Images with resolutions of up to 330 meters per pixel were returned of Nix and up to 1.1 kilometers per pixel of Hydra. Lower-resolution images were returned of Styx and Kerberos. Notes References Sources Codex Regius (2016), Pluto & Charon, CreateSpace Independent Publishing Platform IAU Circular No. 8625, describing the discovery of 2005 P1 and P2 IAU Circular No. 8686, reporting a more neutral color for 2005 P2 IAU Circular No. 8723 announcing the names of Nix and Hydra Background Information Regarding Our Two Newly Discovered Satellites of Pluto – The website of the discoverers of Nix and Hydra External links Scott S. Sheppard: Pluto Moons Interactive 3D visualisation of the Plutonian system Animation of the Plutonian system Hubble Spots Possible New Moons Around Pluto (NASA) Two More Moons Discovered Orbiting Pluto (SPACE.com) New Horizons Mission Site Lists of moons Articles containing video clips