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A Proposal for a Reflecting Astrolabe

Published online by Cambridge University Press:  14 August 2015

D. V. Thomas
D. V. Thomas*
Affiliation:
Royal Observatory, Cape, South Africa

Abstract

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A proposal is made for the construction of a 25 cm aperture “reflecting astrolabe”, using a CER-VIT prism of near-zero thermal expansion. Such an instrument could be expected to have an advantage over the Danjon astrolabe as regards accuracy, declination-range and limiting magnitude.

RÉSUMÉ

On propose de construire un "astrolabe ä réflexion" de 25 cm d'ouverture, en utilisant un prisme de CER-VIT ä coëfficiënt de dilatation quasi nul. Un tel instrument serait supérieur a l'astrolabe Danjon en ce qui concerne la précision, la zone de déclinaisons accessible et la magnitude limite.

Type
Part II: Scientific Papers
Information
Symposium - International Astronomical Union , Volume 32: Continental Drift — Secular motion of the pole , 1968 , pp. 105 - 107
Copyright
Copyright © Reidel 1968 

References

Danjon, A. (1958) M.N.R.A.S., 118, 411.Google Scholar
Guinot, B., Débarbat, S., Krieger-Fiel, J. (1961) Bull. astr., 23, 307.Google Scholar
Thomas, D.V. (1967) Mon. Notes astr. Soc. Sth. Afr., 26, 2.Google Scholar
Thomas, D.V., Wallis, R.E. (1967) R. Obs. Bull. in preparation.Google Scholar