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54. The ellipticity of the corona at 80 Mc./s. during sunspot minimum 1954

Published online by Cambridge University Press:  14 August 2015

J. Tuominen
J. Tuominen*
Affiliation:
The University, Helsinki, Finland

Extract

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The solar eclipse of 30 June 1954 was observed in the neighbourhood of Helsinki on the frequency 81·5 Mc./s. [1]. At the maximum of the optical eclipse 90 % of the solar diameter was occulted by the moon. We may accordingly assume that on the wave-length of observation the eclipse was nearly central. Further, the angle between the orbit of the moon and the solar equator was only 12°.

Type
Part IV: The Quiet Sun
Information
Symposium - International Astronomical Union , Volume 4: Radio Astronomy , 1957 , pp. 302 - 303
Copyright
Copyright © Cambridge University Press 1957 

References

1. Tuominen, J., Riihimaa, J. and Tuori, K. Ann. d'Astrophys. 18, 3–6, 1955.Google Scholar