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CONTEXT: The study of pulsation in Pre--Main--Sequence intermediate-massstars represents an important tool for deriving information on fundamentalstellar parameters and internal structure, as well as for testing currenttheoretical models. Interest in this class of variable stars has significantlyincreased during the last decade and about 30 members are presently known inthe literature. AIMS: We have constructed the frequency spectrum of theoscillations in V346 Ori. We apply asteroseismic tools to these data toestimate the intrinsic parameters (mass, luminosity, effective temperature) ofV346 Ori and to obtain information on its internal structure. METHODS: CCD timeseries photometry in the Johnson V filter has been obtained for a total of145.7 h of observations distributed over 36 nights. The resulting light curveshave been subjected to a detailed frequency analysis using updated numericaltechniques. Photometric and spectroscopic data have also been acquired todetermine reliable estimates of the stellar properties. RESULTS: We haveidentified 13 oscillation frequencies, 6 of which with higher significance.These have been compared with the predictions of non-radial adiabatic models.The resulting best fit model has a mass of 2.1$\pm$0.2 $M_{\odot}$, luminosity$\log{L/L_{\odot}}=1.37^{+0.11}_{-0.13}$, and effective temperature7300$\pm$200 K. These values are marginally consistent with the association ofV346 Ori to Orion OB1a. Alternatively, V346 Ori could be placed at a slightlylarger distance than previously estimated.

Multisite photometry of the pulsating Herbig Ae star V346 Ori