Abstract
view Abstract Citations (26) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Trigonometric Parallaxes determined with the Yerkes Observatory 40-inch Refractor. I. Methods of Observation, Measurement Reduction, and the First Results van Altena, W. F. Abstract The first results of the new Yerkes Observatory 40-inch refractor parallax program are presented. The program has implemented many of the suggestions made by Vasilevskis to increase the accuracy of trigono- metric parallaxes. Based on an analysis of 142 reference-star relative parallaxes in seven different fields, the accuracy of the new Yerkes parallaxes is found to be approximately 4 times greater than that of previous Yerkes determinations based on a similar amount of plate material. The external error of the parallaxes has been evaluated from the distribution of reference-star relative parallaxes and found to be approximately one-third greater than the internal error. Publication: The Astronomical Journal Pub Date: November 1971 DOI: 10.1086/111203 Bibcode: 1971AJ.....76..932V full text sources ADS | Related Materials (6) Part 2: 1973AJ.....78..201V Part 3: 1981LicOB.880....1K Part 4: 1975AJ.....80..647V Part 5: 1978AJ.....83..978V Part 6: 1986AJ.....91.1451V Part 7: 1986AJ.....92..989V
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