Measured spectral energy distribution of V424 Cep as given by the scaled Gaia XP spectrum (green curve with error bars) and fluxes from Bp, G, Rp, J, H, and K photometry (dots), fit with a two-star composite spectrum as described in the text (orange line). This fit spectrum is for a primary effective temperature T₁ = 17 000 K, reddened by E_B − V = 0.645, and a radius R₁ = 7.5. Left panel: Composite spectra for a primary T₁ = 15 000 K and 19 000 K (magenta dots), each with a 2000 K lower temperature for the secondary. The lower and higher temperature spectra are reddened by E_B − V = 0.64 and 0.67, respectively. Right panel: Composite spectrum (dashed gray) comprised of three spectra and reddened by E_B − V = 0.7 (using R = 3.0), which is almost identical to the orange line in the left panel. The primary has a temperature of T₁ = 21 000 K (dotted blue line), the secondary of T₂ = 19 000 K (dotted green line), and the third-light spectrum has T₃ = 10 000 K with 15% of the total flux at the TESS passband (dotted red line).