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24. Commission Des Parallaxes Stellaires Et Des Mouvements Propres

Published online by Cambridge University Press:  25 April 2016

M. J. Jackson
M. J. Jackson*
Affiliation:
H.M. Astronomer at the Cape of Good Hope, Royal Observatory, Cape Town, South Africa

Extract

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The determination of stellar parallaxes photographically using occulting shutters initiated by Schlesinger at Yerkes in 1903 and taken up vigorously at a number of observatories in the northern hemisphere about 1913 and in the southern hemisphere about 1925 has resulted in the determination of more than 9000 parallaxes relating to more than 5000 stars.

The position at the end of 1947 compared with that at the end of 1934 (as shown in I.A.U. Transactions, Vol. 5, 149) is approximately as follows, although for want of official figures some of the data are only estimates.

Type
Part III. Rapports et Comptes rendus
Information
Transactions of the International Astronomical Union , Volume 7 , 1950 , pp. 260 - 266
Copyright
Copyright © Cambridge University Press 1950

References

page no 264 note * Further results have now been published.

page no 265 note * Now published.

page no 266 note * See Pop. Astr. LVI, 421, 1948.