Mathematics – Logic
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...86...93u&link_type=abstract
(IAU Colloquium on Comets in the Post-Halley Era, 116th, Bamberg, Federal Republic of Germany, Apr. 24-28, 1989) Icarus (ISSN 00
Mathematics
Logic
Astronomical Photometry, Comet Tails, Halley'S Comet, Least Squares Method, Sky Brightness, Wide Angle Lenses, Photometry, Theoretical Studies, Comet Tails, Comets, Halley, Imagery, Earth-Based Observations, Extinction, Brightness, Parameters, Analysis, Techniques, Photography, Calculations, Procedure, Magnitude, Color
Scientific paper
An examination is made of the problem posed by wide-angle photographic photometry, in order to extract a photometric-morphological history of Comet P/Halley. Photometric solutions are presently achieved over wide angles through a generalization of an assumption-free moment-sum method. Standard stars in the field allow a complete solution to be obtained for extinction, sky brightness, and the characteristic curve. After formulating Newton's method for the solution of the general nonlinear least-square problem, an implementation is undertaken for a canonical data set. Attention is given to the problem of random and systematic photometric errors.
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