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We present a high-precision chemical analysis of iota Horologii, aplanet-host field star thought to have formed in the Hyades. Elements withatomic number 6<=Z<=30 have abundances that are in excellent agreement withthose of the cluster within the +/-0.01 dex (or ~2%) precision errors. Heavierelements show a range of abundances such that about half of the Z>30 speciesanalyzed are consistent with those of the Hyades, while the other half aremarginally enhanced by 0.03+/-0.01 dex (~7+/-2%). The lithium abundance, A(Li),is very low compared to the well-defined A(Li)-Teff relation of the cluster.For its Teff, iota Horologii's lithium content is about half the Hyades'.Attributing the enhanced lithium depletion to the planet would require apeculiar rotation rate, which we are unable to confirm. Our analysis of thestar's chromospheric activity suggests Prot=5d, which is significantly shorterthan previously reported. Models of Galactic orbits place iota Horologiihundreds of parsecs away from the Hyades cluster at formation. Thus, we findthe claim of a shared birthplace very difficult to justify.

iota Horologii is unlikely to be an evaporated Hyades star