Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...67..251d&link_type=abstract
Icarus (ISSN 0019-1035), vol. 67, Aug. 1986, p. 251-263.
Astronomy and Astrophysics
Astronomy
9
Asteroids, Astronomical Photometry, Interferometry, Speckle Patterns, Albedo, Amplitudes, Angular Distribution, Ellipsoids, Magnitude
Scientific paper
Photometric interferometry data on the fifth largest minor planet, 511 Davida, are used to generate orbital elements and physical dimensions. The Seward 2.3 m telescope was employed to obtain the speckle interferometric data. The asteroid was assumed to be a uniform-surfaced triaxial ellipsoid rotating about its shortest axis. A simultaneous amplitude-magnitude aspect method is defined for determining the pole position of the object, which is calculated to be within 4 deg of (307 deg; +32). A weighted amplitude aspect relation provides similar data. The albedos are estimated to lie within the range 0.24-0.42, and an a/b axial ratio of 0.97-1.66 is projected. The variations in the photometric albedos are taken as evidence of a nonuniform surface, a conclusion similar to that reached after earlier photometric measurements of the asteroid Herculina.
Drummond Jack D.
Hege Keith E.
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