A Preliminary Speckle Orbit of the Old Disk Population Star HR 1071

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Abstract
The F7V star HR 1071 has attracted little individual attention in the literature. Eggen (1972, 1973) included HR 1071 among some 250 metal–deficient stars, of which 20 are halo population objects, in a photometric calibration of their absolute magnitudes. HR 1071 stands out in Eggen’s sample as a disk population star of extreme space velocity compared with stars of similar moderate metal deficiency, having (U, V, W) = (−60, −39, +8) km s−1. Kinematically, HR 1071 would be considered an old disk population star although this classification would be strengthened if the metallicity were lower. More recently, Balachandran (1990, hereafter BAL) took Eggen’s (1973) sample as a basis for studying the possible effects of rotational breaking on Li depletion in old–disk population F stars. HR 1071 possesses the fifth lowest Li abundance (the Li λ6707 Å equivalent width was less than 1 mÅ) and the third lowest observed rotational velocity of 5 km s−1 in BAL’s sample.