Notes. The numbers in bold highlight the criteria that tLRD does not satisfy; these are related to its optical emission. The Kokorev et al. (2024) compactness criterion refers to the ratio between the flux measured in 0.4″ and 0.2″ apertures. The symbol bd indicates brown dwarf; r_h is the half-light radius measured in the F444W of Kocevski et al. (2025). In this case 1.5r_{h,  stars} ∼ 2.6 pix. In the Kocevski et al. (2025) criteria, $\beta =\frac{0.4({\mathrm{m}}_1-{\mathrm{m}}_2)}{\log ({\lambda }_2/{\lambda }_1)}-2$. Following Table 2 in that paper, the UV filters correspond to F115W, F150W, and F200W, and the optical filters to F277W, F356W, and F444W. Although β_opt < 0 when derived using F277W and F444W, β_opt = 2.1 when using F356W and F444W. We also include the β_opt value estimated directly from the spectrum. ^* This is the only reliable measurement of the optical slope, given that F277W, F410M, and F444W are contaminated by strong emission lines.