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Science 21 February 1969:
Vol. 163. no. 3869, pp. 815 - 817
DOI: 10.1126/science.163.3869.815
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Articles

Venus: Absence of a Phase Effect at a 2-Centimeter Wavelength

David Morrison 1

1 Harvard College Observatory and Smithsonian Astrophysical Observatory, Cambridge, Massachusetts

Observations of Venus made during 1967 and 1968 at a frequency of 15.4 gigahertz set an upper limits of 5 percent for the variation of brightness temperature with phase. This negative result appears to contradict earlier detections of a phase effect. By comparison with Virg A (3C 274), which has an assumed flux density of 29 x 10-26 watt per square meter per hertz, the brightness temperature of Venus at this frequency is 485 + 60, -40°K (mean error).


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Venus: The Next Phase of Planetary Exploration.
D. M. Hunten, D. M. Hunten, and R. M. Goody (1969)
Science 165, 1317-1323
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Science. ISSN 0036-8075 (print), 1095-9203 (online)