An Analysis of Errors in the Star Catalogues of Ptolemy and Ulugh Beg

@article{Shevchenko1990AnAO,
  title={An Analysis of Errors in the Star Catalogues of Ptolemy and Ulugh Beg},
  author={Mikhail Shevchenko},
  journal={Journal for the History of Astronomy},
  year={1990},
  volume={21},
  pages={187 - 201}
}
  • M. Shevchenko
  • Published 1 May 1990
  • Physics
  • Journal for the History of Astronomy
The main peculiarity of Ptolemy's catalogue is the mean systematic error in the longitudes of the stars exceeding 1 • Many astronomers, in a European tradition going back to Tycho Brahe, I have considered the presence of such error to be an unambiguous indication that the catalogue was borrowed and modified rather than being a product of direct observations. Analysis of the fractional degrees of star coordinates by R. R. Newtonseemingly confirmed the artificial origin of the longitudinal shift… 

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References

SHOWING 1-10 OF 19 REFERENCES

Observing with the Armillary Astrolabe

In this paper I investigate the merits and limitations of the armillary astrolabe,' which served for direct observations of the ecliptic longitudes and latitudes of the heavenly bodies from Antiquity

All calculations used data from Knobel, op

    A history ofancient mathematical astronomy

    • (Berlin and New York,
    • 1975

    Die Geschichte des Ptolemaeischen Sternenkatalogs (doctoral diss

    • Grasshoff's charts
    • 1986