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If stars form in clusters but most stars belong to the field, understandingthe details of the transition from the former to the latter is imperative toexplain the observational properties of the field. Aging open clusters are oneof the sources of field stars. The disruption rate of open clusters slows downwith age but, as an object gets older, the distinction between the remainingcluster or open cluster remnant (OCR) and the surrounding field becomes lessand less obvious. As a result, finding good OCR candidates or confirming theOCR nature of some of the best candidates still remains elusive. One of theseobjects is NGC 1252, a scattered group of about 20 stars in Horologium. Here weuse new wide-field photometry in the UBVI pass-bands, proper motions from theYale/San Juan SPM 4.0 catalogue and high resolution spectroscopy concurrentlywith results from N-body simulations to decipher NGC 1252's enigmaticcharacter. Spectroscopy shows that most of the brightest stars in the studiedarea are chemically, kinematically and spatially unrelated to each other.However, after analysing proper motions, we find one relevant kinematic group.This sparse object is relatively close (about 1 kpc), metal poor and isprobably not only one of the oldest clusters (3 Gyr) within 1.5 kpc from theSun but also one of the clusters located farthest from the disc, at an altitudeof nearly -900 pc. That makes NGC 1252 the first open cluster that can be trulyconsidered a high Galactic altitude OCR: an unusual object that may hint at astar formation event induced on a high Galactic altitude gas cloud. TW Hor andHD 20286 are unlikely to be part of NGC 1252. NGC 1252 17 is identified as anunrelated, Population II cannonball star moving at about 400 km/s.

NGC 1252: a high altitude, metal poor open cluster remnant