Context : Different environmental conditions can play a crucial role in determining final products of the star formation process and in this context , less favorable activities of star formation are expected in the external regions of our Galaxy .

Aims : We studied the properties of the young open cluster NGC 1893 located about 12 Kpc from the galactic center , to investigate how different physical conditions can affect the process of star formation .

Methods : By adopting a multiwavelength approach , we compiled a catalog extending from X-rays to NIR data to derive the cluster membership .
In addition , optical and NIR photometric properties are used to evaluate the cluster parameters .

Results : We find 415 diskless candidate members plus 1061 young stellar objects with a circumstellar disk or class II candidate members , 125 of which are also H _ { \alpha } emitters .
Considering the diskless candidate members , we find that the cluster distance is 3.6 \pm 0.2 kpc and the mean interstellar reddening is E ( B-V ) =0.6 \pm 0.1 with evidence of differential reddening in the whole surveyed region .

Conclusions : NGC 1893 contains a conspicuous population of pre-main sequence stars together with the well studied main sequence cluster population ; we found a disk fraction of about 70 % similar to that found in clusters of similar age in the solar neighbour and then , despite expected unfavorable conditions for star formation , we conclude that very rich young clusters can form also in the outer regions of our Galaxy .