Radius and limb darkening of Titan from speckle imaging

Details Radius and limb darkening of Titan from speckle imaging Radius and limb darkening of Titan from speckle imaging

Nov 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1690n&link_type=abstract

Astronomical Journal, vol. 86, Nov. 1981, p. 1690-1693.

Astronomy and Astrophysics

Astronomy

3

Astronomical Photography, Image Enhancement, Limb Darkening, Radii, Speckle Patterns, Titan, Algorithms, Atmospheric Attenuation, Cameras, Isophotes, Video Equipment

Scientific paper

The radius R of Titan is determined from ground-based, visible light observations using a two-dimensional speckle imaging technique. The value of R is found to depend on the limb-darkening exponent alpha, which is used in modeling the observed disk, and it is determined that the probable range extends from R values of 2680 + or - 100 km for alpha of 0.6 to 2900 + or - 100 km for alpha of 1.3. This range is in agreement with Voyager 1 and Pioneer Saturn observations. It is suggested that spatial resolution may be doubled by using a grid of 256 x 256 pixels at the time the image is digitized, and that further improvements are possible with speckle-reduction techniques under development.

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