We present the first ground-based near-infrared image of the circumstellar disk around the post-Herbig Ae/Be star HD141569A initially detected with the HST .
Observations were carried out in the near-IR ( 2.2 \mu m ) at the Palomar 200-inch telescope using the adaptive optics system PALAO .
The main large scale asymmetric features of the disk are detected on our ground-based data .
In addition , we measured that the surface brightness of the disk is slightly different than that derived by HST observations ( at 1.1 \mu m and 1.6 \mu m ) .
We interpret this possible color-effect in terms of dust properties and derive a minimal grain size of 0.6 \pm 0.2 \mu m for compact grains and a power law index for the grain size distribution smaller than -3 .
Basic dynamical considerations are consistent with the presence of a remnant amount of gas in the disk .