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0phi 0rio added Alden O'Connell allaxes Apds Aqar 23 Aqil arguments Atry average BD No Spect Catalogue Cmp Dsp common proper motion computed configurations contains curve Decl 1950 Prec Decl BD Decl Prec decrease dependence deviations diameters discussed dispersion Epoch of observation Erid exposure film errors film shift Frec group corrections group errors Grus h m h Hyda images indicated Johannesburg Magn RA Prec Magn Spect RA material mean value Micr Motions in Decl Motions in RA numbers of parallaxes obtained parallax determinations parallax star photographic magnitude plates taken probable error Proper in RA Proper Motions BD RA in Decl RA Motions reductions right ascension Schlesinger Section sector opening Serp six groups spectra spectral types Spectroscopic binary Speot systematic effects taken on JD Total Variable radial velocity variation visual magnitude Yale parallaxes Z-groups zenith distances zero epochs