Decomposition of the observed rotation curve of VCC 693 using the NFW (left panel) and spherical pseudo-isothermal (ISO, right panel) dark matter halo models. The red points and red lines represent the observed circular velocity and best-fitting rotation curve. The first two light red points indicate data affected by the bar, but including them in the fitting does not significantly affect the fitted parameters. The blue, orange, and black lines show the contribution of the stellar, gas, and dark matter components to the total circular velocity, respectively. The best-fitting rotation curves with c₂₀₀ fixed at 12 in the left panel and ρ₀ fixed at 0.1 M_⊙ pc⁻³ in the right panel are overplotted with dashed green lines.