Neptune cloud structure at visible wavelengths

Details Neptune cloud structure at visible wavelengths Neptune cloud structure at visible wavelengths

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989sci...244.1165h&link_type=abstract

Science (ISSN 0036-8076), vol. 244, June 9, 1989, p. 1165-1167.

Physics

16

Cloud Cover, Neptune Atmosphere, Planetary Rotation, Planetary Structure, Visible Spectrum, Absorption Spectra, Methane, Near Infrared Radiation, Spectral Bands

Scientific paper

Digital images of Neptune showing cloud structure at visible wavelengths were obtained in July 1988. A discrete bright feature was detected both at 6190 A (a weak methane absorption band in the visible) and at 8900 A (a stronger methane band in the near infrared). The images also revealed that Neptune's southern pole was bright relative to planetary mid-latitudes at 6190 A but not 8900 A. The implications of these findings for atmospheric rotation and structure are discussed. The detection of discrete features at visible wavelengths is of special importance to the upcoming Voyager encounter with Neptune: the wide-angle camera has a 6190 A filter similar to that used for these observations.

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