The activity profile of comet 55P/Tempel-Tuttle in 1998 return: meteoroid release concentration on the perihelion

Details The activity profile of comet 55P/Tempel-Tuttle in 1998 return: meteoroid release concentration on the perihelion The activity profile of comet 55P/Tempel-Tuttle in 1998 return: meteoroid release concentration on the perihelion

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.495..175w&link_type=abstract

In: Proceedings of the Meteoroids 2001 Conference, 6 - 10 August 2001, Kiruna, Sweden. Ed.: Barbara Warmbein. ESA SP-495, Noordw

Astronomy and Astrophysics

Astronomy

4

Comets, Comet:Individual-55P/Temple Tuttle, Solar System

Scientific paper

It is important to know the activity profile of the parent comets of meteor showers. The activity of the parent comet of the Leonids, 55P/Tempel-Tuttle had never been followed until the recent return in 1998 mainly due to the poor observational condition of the comet relative to the Earth. We carried out a CCD imaging monitor of this comet from January through February in 1998 by using 50-cm telescope of National Astronomical Observatory, Japan. The circular shape of the coma was not changed during this period for the pre-perihelion phase. This indicated that the dust production rate was not so high, which was also confirmed as a high value of the gas to dust ratio obtained by spectroscopic observations. The photometric measurements of the coma indicated high dependency of the activity on the heliocentric distance, of which the photometric index n is derived as about 10. These facts suggest that the ejection of the Leonids' meteoroids strongly concentrated at around the perihelion passage.

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