Spectrum of V2376 Ori b (black curve) compared to three models, with the corresponding residuals shown below each fit. (A) orange line shows a blackbody fit at T = 1900 ± 300 K. (B) comparison with the ATMO 2020 synthetic spectrum. The blue line shows the best-fit for T = 3000 K and log(g) = 4.0. (C) comparison with the BT-Cond model. The best-fit for T = 3000 K and log(g) = 5.0 is represented by the green line. Residuals are computed as the difference between the observed spectrum and each model.