Ultra-hot rocky exoplanets above 1700 K may possess dayside temperatures that are hot enough to have their surfaces vaporize and become a silicate vapor atmosphere. Secondary eclipse thermal emission can efficiently probe for the presence of these atmospheres on a rocky planet. We observed single JWST MIRI/LRS secondary eclipses for 10 ultra-hot

Elemental composition is an essential factor in the chemistry of planetary and brown dwarf atmospheres; however, the majority of low-temperature objects near the Sun have nearly indistinguishable abundance patterns. In this talk, I will review some of the key findings of the JWST Cycle 3 "Arcana of the Ancients" program, which obtained NIRSpec and

We report a rotational light curve and Fourier baseline model for the Jupiter Trojan (15094) Polymele, a primary target of the NASA Lucy mission, obtained on 2026 May 19─20 and May 21─22 UT with the Two-meter Twin Telescope (TTT). Phase-Dispersion Minimization over the combined two-night dataset yields P rot = 5.762 ± 0.051 hr and a peak-to-peak