Left : plot of the extinction correction estimation for NGC 2264 N & S. The extinction values of each cell were determined by drawing the extinction values derived from the STARHORSE code and Gaia DR3 data from a catalog of stars (Anders et al. 2022). We divided the cluster into 0.2° radial ascension by 0.2° declination cells. Then we took the median extinction value of each cell and applied it to all the YSOs within that cell, thereby estimating each YSOs’ extinction value. The YSOs are overplotted as orange crosses. The lowest number of catalog stars populating any cell is N_min = 20 for Collinder 95 and N_min = 31 for NGC 2264. Right : same but for Collinder 95.