Pluto's atmosphere

Details Pluto's atmosphere Pluto's atmosphere

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...77..148e&link_type=abstract

Icarus (ISSN 0019-1035), vol. 77, Jan. 1989, p. 148-170.

Astronomy and Astrophysics

Astronomy

93

Astronomical Photometry, Methane, Pluto Atmosphere, Atmospheric Models, Extinction, Light Curve, Optical Thickness, Stellar Occultation, Pluto, Atmosphere, Occultations, Ccd Methods, Astronomy, Photometry, Koa Aircraft, Aircraft Observations, Lightcurves, Extinction, Models, Radius, Depth, Parameters, Optical Properties, Composition, Nitrogen, Temperature, Thickness, Pressure, Geometry, Diagrams, Calculations, Structure, Surface, Gases, Methane

Scientific paper

Airborne CCD photometer observations of Pluto's June 9, 1988 stellar occultation have yielded an occultation lightcurve, probing two regions on the sunrise limb 2000 km apart, which reveals an upper atmosphere overlying an extinction layer with an abrupt upper boundary. The extinction layer may surround the entire planet. Attention is given to a model atmosphere whose occultation lightcurve closely duplicates observations; fits of the model to the immersion and emersion lightcurves exhibit no significant derived atmosphere-structure differences. Assuming a pure methane atmosphere, surface pressures of the order of 3 microbars are consistent with the occultation data.

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