The Jovian Irregular Satellites with MIRI LRS

The irregular satellites of Jupiter are a swarm of small, asteroid-like objects in orbit from ~100-400 Jupiter radii from the planet. These objects are thought to have been captured after the planet formed, although their precise origins remain obscure. Previous results have found the Jovian irregular satellites to contain a wide abundance of materials, suggestive of complex parent bodies that include peers amongst both the Jovian Trojans and the main belt. We will discuss mid-infrared observations taken of eight Jovian irregular satellites with JWST (~5-14 microns), with particular comparison to previous MIR observations of Jovian Trojan asteroids, main belt asteroids, and in light of recent near-infrared spectroscopy also collected as part of this program. By modeling the combination of both satellites' reflected sunlight and thermal emission, we will discuss improved constraints on the sizes, albedos, and textural properties of our sample.