Figure 2
From: A deep investigation of the poorly studied open cluster King 18 using CCD VRI, Gaia DR3 and 2MASS
The number surface density of King 18 using the data of Gaia DR3. The cross-hairs represent the center of King 18 cluster. The green and blue circles are stars batches around the cluster. They might be companions to King 18 (the running future work).
