Table 5: Parameters for the RGB width analysis and sigma values from the Gaussian fits of color distributions of observed and artificial stars.
Cluster ID G78 G213 G280

$R_{\rm in} \rm (arcsec)$ 5.1 3.7 4.2

$R_{\rm out} ({\rm arcsec})v$ 6.4 5.3 5.6

Cluster density (stars per arcsec²) 14 20 19

Field density (stars per arcsec²) 7 15 12

Cluster surface (arcsec²) 55 45 43

$\sigma_{\rm obs} \pm \Delta \sigma_{\rm obs}$ 0.1449 $\pm$ 0.0395 0.1110 $\pm$ 0.0261 0.1439 $\pm$ 0.0415

$\sigma_{\rm art} \pm \Delta \sigma_{\rm art}$ 0.0587 $\pm$ 0.0142 0.0472 $\pm$ 0.0085 0.0566 $\pm$ 0.0129

$\sigma_{\rm int} \pm \Delta \sigma_{\rm int}$ 0.1325 $\pm$ 0.0397 0.1005 $\pm$ 0.0261 0.1323 $\pm$ 0.0416

**Table 5:** Parameters for the RGB width analysis and sigma values from the Gaussian fits of color distributions of observed and artificial stars.
Cluster ID	G78	G213	G280
$R_{\rm in} \rm (arcsec)$	5.1	3.7	4.2
$R_{\rm out} ({\rm arcsec})v$	6.4	5.3	5.6
Cluster density (stars per arcsec²)	14	20	19
Field density (stars per arcsec²)	7	15	12
Cluster surface (arcsec²)	55	45	43
$\sigma_{\rm obs} \pm \Delta \sigma_{\rm obs}$	0.1449 $\pm$ 0.0395	0.1110 $\pm$ 0.0261	0.1439 $\pm$ 0.0415
$\sigma_{\rm art} \pm \Delta \sigma_{\rm art}$	0.0587 $\pm$ 0.0142	0.0472 $\pm$ 0.0085	0.0566 $\pm$ 0.0129
$\sigma_{\rm int} \pm \Delta \sigma_{\rm int}$	0.1325 $\pm$ 0.0397	0.1005 $\pm$ 0.0261	0.1323 $\pm$ 0.0416

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