Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984coas.conf...14l&link_type=abstract
In JPL Cometary Astrometry p 14-20 (SEE N85-25015 14-89)
Astronomy and Astrophysics
Astronomy
Digital Techniques, Dust, Halley'S Comet, Image Processing, Models, Photographs, Emission Spectra, Morphology, Particle Size Distribution, Spatial Distribution, Temporal Distribution
Scientific paper
The near-nucleus dust coma structure of Comet Halley are studied using modern digital image processing techniques on photographs taken in 1910. Recent investigations carried out in conjunction with the Near-Nucleus Studies Net of the IHW to better understand the characteristics and behavior of Comet Halley are reviewed. A new image processing algorithm developed to enhance coma feature boundaries permits their evolution over as many as three days to be followed. The features can be modeled to derive information on the nucleus spin vector, particle sizes, ejection velocities and distribution of emission areas on the nucleus. Useful contributions by observers in the Astrometry Net are also discussed.
Larson Sam
Sekanina Zdenek
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