Spectral data cube and near-infrared spectra of Mors–Somnus. Left: A single slice of the spectral data cube obtained by the NIRSpec IFU showing the resolved Mors (primary – dark purple circle) and Somnus (secondary – light purple circle) TNO binary system. The separation between the two components is ∼1100 mas. Right: Normalized reflectance of Mors at 1.25 μm (dark purple line) and Somnus reflectance scaled to Mors (light purple line) after removal of the solar contribution versus wavelength (μm). The 1σ uncertainties are represented by the light gray bars.