Fitting theoretical photometric functions to asteroid phase curves

Details Fitting theoretical photometric functions to asteroid phase curves Fitting theoretical photometric functions to asteroid phase curves

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...78..330d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 78, April 1989, p. 330-336. Research supported by NASA.

Astronomy and Astrophysics

Astronomy

22

Asteroids, Astronomical Photometry, Light Curve, Albedo, Angular Distribution, Light Scattering, Magnitude, Reflectance, Asteroids, Theoretical Studies, Photometry, Phase Curves, Parameters, Calculations, Albedo, Wavelengths, Scattering, Roughness, Density, Physical Properties

Scientific paper

The ways in which variations in the parameters of Hapke's (1981, 1984, 1986) theoretical photometric function for fitting photometric phase data of asteroids can affect the shape of the theoretical curve are considered. It is noted that, between phase angles of 2 and 25 deg, the opposition effect parameters, the roughness parameter, and the single-particle phase function parameter have similar effects on the shape and the photometric curve and are difficult to separate on the basis of disk-integrated data alone. The uniqueness of asteroid surface properties deduced from phase curve observations over a limited phase-angle range is judged to remain questionable.

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