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arXiv 2012.121722020-12-22astro-ph.EP

A Photometric and Dynamic Study of Comet C/2013 A1 (Siding Spring) from Observations at a Heliocentric Distance of ~4.1 AU

Yu. S. Andrienko, A. V. Golovin, A. V. Ivanova, V. N. Reshetnik, S. N. Kolesnik, S. A. Borisenko

备注：: 11 pages, 10 figures
DOI：: 10.1134/S0038094616020015

英文摘要：

An analysis is presented for the photometric data on comet C/2013 A1 (Siding Spring) from observations at a large heliocentric distance (near 4.1 AU). Comet C/2013 A1 (Siding Spring) displays intense activity despite the relatively large heliocentric distance. The morphology of the comet's coma is analyzed. The following parameters are measured: the color indices V-R, the normalized spectral gradient of the reflectivity of the comet's dust S', and the dust production rate Af\r{ho}. A numerical simulation is performed for the evolution of the comet's orbit after a close encounter with Mars. The most probable values are obtained for the Keplerian orbital elements of the comet over a hundred-year period. The comet's orbit remains nearly parabolic after passing the orbits of all the Solar System planets.

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