Exploring the Trans-Neptunian Solar System (1998) / Chapter Skim
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3 Key Measurement Objectives
3 Key Measurement Objectives
Pages 30-35
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From page 30... ...
In this chapter COMPLEX indicates the priority of the scientific measurements and studies that, based on current knowledge, are needed to advance understanding of objects at the fringe of the outer solar system. ORBITS Distribution of Orbits A meaningful comparison between the distribution of orbital properties of KBOs and dynamical models of their orbital evolution requires accurate observations of a large population of objects.
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From page 31... ...
· Performing precise astrometric observations of ~100 KBOs over a period of at least 5 years for accurate orbit determinations. BULK PROPERTIES Measuring Bulk Properties To estimate the density and, hence, bulk composition of a planetary body requires separate measurements of its mass and size.
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From page 32... ...
· Obtaining visual and near-infrared images of Pluto-Charon during a spacecraft flyby to enable geological mapping and crater population studies, as well as a search for evidence of tectonics, indicators of the distribution of frosts, and evidence of cryogenic volcanism. · Performing multispectral observations of a statistically useful number (tens)
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From page 33... ...
The fact that a single radio telescope can routinely measure rotational line emission from these molecules in Triton's much denser atmosphere suggests that this technique may be extended to thinner and more distant atmospheres. Key Measurements Relating to Atmospheres · Performing solar and radio occultations of Pluto's atmosphere with ultraviolet and radio instruments during a flyby mission.
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From page 34... ...
Such reactions assume increased importance when neutral chemical reactions are suppressed, as they are at the extremely low temperatures found in the atmospheres of Pluto and Triton. Since neutral reactions are also suppressed in interstellar molecular clouds, laboratory studies could, potentially, provide a synergistic link between the material from which the solar system formed and the remnant material existing today in the transneptunian region.
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From page 35... ...
THEORETICAL STUDIES Researchers need the complementary efforts of theoretical and computational studies to analyze and interpret observational data and provide a framework for understanding its significance. Theory also plays an important role in suggesting future directions for observational and laboratory research.
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