On the dust tail of Comet Austin 1989c1

Details On the dust tail of Comet Austin 1989c1 On the dust tail of Comet Austin 1989c1

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990pasj...42l..69w&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 42, no. 5, 1990, p. L69-L73.

Astronomy and Astrophysics

Astronomy

4

Austin Comet, Comet Tails, Interplanetary Dust, Interstellar Matter, Carbon Dioxide, Comet Nuclei, Morphology, Perihelions, Solar Orbits

Scientific paper

A peculiar dust tail of Comet Austin 1989c1 was observed before its perihelion passage. A theoretical calculation indicates that the tail comprises large particles of millimeter-submillimeter size. The calculation also shows that these particles were ejected from about 1000 d before its perihelion passage. This information provides evidence of strong activity at a large heliocentric distance of about 11 AU, while suggesting an abundant existence of such volatile materials as CO2 in the nucleus of this comet. The lifetime of the observed particles is longer than that of icy grains.

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