(M_J, J–K_S) color-absolute magnitude diagram of our objects, very low-gravity objects (orange circles), and field objects (gray circles) from the literature (AA22; Database of Ultracool Parallaxes). Our sample is divided according to the age of the association to which the objects probably belong. Green stars represent objects in regions with ages <30 Myr, dark gray pentagons with ages between 30 and 100 Myr (included), red diamonds with ages between 100 and 300 Myr (included), and white squares with ages ~600 Myr. For data points where the error bar is not visible, the bar is smaller than the marker size. The three ellipses approximately highlight where the M, L, and T dwarfs are located in this diagram. The arrow indicates what effect the addition of five magnitudes of extinction would have.