Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991plas.rept...75l&link_type=abstract
In NASA, Washington, Reports of Planetary Astronomy, 1991 p 75-76 (SEE N92-12792 03-89)
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Comets, Imaging Techniques, Morphology, Anisotropy, Astrometry, Brightness, Charge Coupled Devices, Comet Tails, Cosmic Dust, Photometry
Scientific paper
The objective is to investigate the spectroscopic and morphological characteristics of comets and selected minor planets over a wide range of heliocentric distances as they may suggest or constrain models of cometary processes, their formation environments and evolution. Direct images of all observable comets and 300-800 nm spectra of the brighter ones are obtained on a monthly basis with a charge coupled device spectrograph-camera. The direct images may be used for astrometry, photometry, and studies of coma and tail morphology. In some cases, anisotropic dust emission can provide information on the nucleus spin vector. Spectra may provide data on strengths of the principle emission for comparison of gas/dust ratios of a large sample of comets. Long integrations of minor planets in comet-like and nearby orbits are made to search for faint comae.
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