The Structure of the Inner Coma of Comet Chiron: Imaging the Exopause

Details The Structure of the Inner Coma of Comet Chiron: Imaging the Exopause The Structure of the Inner Coma of Comet Chiron: Imaging the Exopause

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.3769m&link_type=abstract

HST Proposal ID #3769

Physics

Hst Proposal Id #3769

Scientific paper

We propose to use the Planetary Camera to obtain a series of images of 2060 Chiron. The radial brightness distribution obtained from these images will be used (i) to locate an exopause structure which would indicate gravitational control by the nucleus over the structure of the inner coma, and (ii) to explore the inner coma for indications of active regions which will reveal the number and location of major sources on the nucleus. The detection of the exopause, when combined with particle size information obtained from ground-based observations of color gradients in the outer coma, will constrain models of the structure of the dust coma and allow us to make a rough estimate of the mass of Chiron. The exopause is expected to be located between 0.3-0.4 arcseconds from the nucleus during 1993 (Cycle 2), thus the resolution capabilities of HST are required for this project.

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