Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jbaa...97..139m&link_type=abstract
Journal of the British Astronomical Association, vol.97, no.3, p.139-154
Astronomy and Astrophysics
Astronomy
1
Mars, Astronomy, Earth-Based Observations, Surface, Features, Clouds, Polar Regions, Polar Caps, Occultations, Description, Photographs, Maps, Telescope Methods, Intensity, Atmosphere, Catalog, Data, Diagrams
Scientific paper
The low altitude of Mars for northern hemisphere observers during the 1984 opposition considerably reduced the number of observations made in the UK. Thanks to numerous overseas contributions, however, the apparition has been well covered. The Martian surface showed several small changes from 1982, the most interesting being the disappearance of the Claritas- Daedalia feature and the return to prominence of the Phasis 'canal' nearby. There was a moderate level of white cloud activity and an unusually high frequency of yellow cloud throughout the period of observation. The behaviour of both polar regions was documented, including the formation of the north polar hood, and the emergence of the south polar cap from beneath the south polar hood. The report concludes with an account of a stellar occultation by Mars.
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