C/1999 S4 (LINEAR): la morte di una cometa

Details C/1999 S4 (LINEAR): la morte di una cometa C/1999 S4 (LINEAR): la morte di una cometa

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002asuai...1....7f&link_type=abstract

Astronomia. La rivista dell'Unione Astrofili Italiani (ISSN 0392-2308), N. 1, p. 7 - 11 (gennaio-febbraio 2002)

Mathematics

Logic

Comets, Dissolution

Scientific paper

The comet C/1999 S4 was expected to be a moderately bright object during summer 2000. It was observed by visual, photographic and CCD techniques. The derived light curve shows that the comet reached a brightness maximum (mag. 6 around July 26) corresponding to the total dissolution of its nucleus. From the analysis of the light curve a double maximum was detected, the dissolution event appearing to start around July 20. Several morphological changes were also observed during the apparition in relation to partial fragmentation events. The comet aspect completely changed during the final disruption. Relevant changes in the plasma tail were observed and they are probably related both to the activity of the nucleus and to the solar wind. A perspective anti-tail was detected in early July.

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