  We report new millimeter observations of the circumstellar material
surrounding the Herbig Ae A0.5 star HD 34282 performed with the IRAM array in
CO J=2-1 and in continuum at 1.3 mm. These observations have revealed the
existence of a large Keplerian disk around the star. We have analysed
simultaneously the line and continuum emissions to derive the physical
properties of both the gas and the dust. The analysis of our observations also
shows that the Hipparcos distance to the star is somewhat underestimated ; the
actual distance is probably about 400 pc. With this distance the disk around HD
34282 appears more massive and somewhat hotter than the observed disks around
less massive T Tauri stars, but shares the general behaviour of passive disks.
