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The young eruptive star V1647 Ori was observed with MIDI, the mid-infraredinterferometric instrument at the Very Large Telescope Interferometer (VLTI),on March 2, 2005. We present the first spectrally resolved interferometricvisibility points for this object. Our results show that (1) the mid-infraredemitting region is extended, having a size of ~ 7 AU at 10 um; (2) nosignatures of a close companion can be seen; (3) the 8-13 um spectrum exhibitsno obvious spectral features. Comparison with similar observations of Herbig Aestars suggests that V1647 Ori probably possesses a disk of moderate flaring. Asimple disk model with T ~ r^{-0.53}, \Sigma ~ r^{-1.5}, M_d = 0.05 M_Sun isable to fit both the spectral energy distribution and the observed visibilityvalues simultaneously.Comment: 4 pages, 4 figures, accepted for publication in Astronomy and  Astrophysics Letter

First AU-scale observations of V1647 Orionis with VLTI/MIDI