The 1990-1991 Eastern (Evening) Apparition of Venus: Visual and photographic observations

Details The 1990-1991 Eastern (Evening) Apparition of Venus: Visual and photographic observations The 1990-1991 Eastern (Evening) Apparition of Venus: Visual and photographic observations

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jalpo..37..145b&link_type=abstract

Association of Lunar and Planetary Observers, Journal (ISSN 0039-2502), vol. 37, no. 4, p. 145-153

Astronomy and Astrophysics

Astronomy

Cusps, Dichotomies, Limb Brightening, Terminator Lines, Venus (Planet), Venus Atmosphere, Astronomical Photography, Charge Coupled Devices, Drawings, Visual Observation

Scientific paper

This report summarizes visual and photographic observations of Venus for the 1990-91 Eastern (Evening) Apparition, based on data submitted by the Association of Lunar and Planetary Observers (ALPO), Venus Section observers in the United States, Canada, the United Kingdom, Belgium, France, Austria, Germany, Spain, Sweden, Italy, and Brazil, including the instrumentation and sources of data used in completing those observations. Comparative studies deal with observers, instruments, and visual and photographic data. The report includes illustrations and a statistical analysis of the categories of features in the atmosphere of Venus; including cusps, cusp-caps, and cusp-bands, seen or suspected at visual wavelengths, both in integrated light and with color filters. Terminator irregularities and the apparent phase are discussed, as well as coverage based on results from the continuing monitoring of the dark hemisphere of Venus for the Ashen Light.

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