The angular diameter of Vesta from speckle interferometry

Details The angular diameter of Vesta from speckle interferometry The angular diameter of Vesta from speckle interferometry

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...32..450w&link_type=abstract

Icarus, vol. 32, Dec. 1977, p. 450-457.

Astronomy and Astrophysics

Astronomy

24

Astrometry, Diameters, Interferometry, Planetology, Vesta Asteroid, Autocorrelation, Data Reduction, Diffraction Limited Cameras, Digital Techniques, Speckle Patterns

Scientific paper

It is shown that the autocorrelation function of a telescope diffraction-limited image is closely approximated by a subtraction of the mean cross correlation of pairs of speckle photographs from the mean autocorrelation of the same set of data. This fact is used to derive the angular diameter of the asteroid Vesta from a series of speckle interferometry data. The resultant apparent angular diameter of 0.40 + or - 0.04 sec of arc corresponds to an absolute diameter of 513 + or - 51 km.

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