Ion Tail Disturbance of Comet C/Hyakutake 1996B2 Observed around the Closest Approach to the Earth

Details Ion Tail Disturbance of Comet C/Hyakutake 1996B2 Observed around the Closest Approach to the Earth Ion Tail Disturbance of Comet C/Hyakutake 1996B2 Observed around the Closest Approach to the Earth

Oct 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasj...48l..83k&link_type=abstract

Publications of the Astronomical Society of Japan, v.48, p.L83-L86.

Astronomy and Astrophysics

Astronomy

Comets: Individual (Comet C/Hyakutake 1996B2), Interplanetary Medium, Magnetic Field, Plasmas

Scientific paper

A sequential imaging observation of the ion tail of Comet C/Hyakutake 1996B2 was carried out on 1996 March 25 with a wide-field CCD imaging camera developed at the National Astronomical Observatory of Japan. We detected a peculiar knot receding along the main axis of the ion tail during our observation. This knot was located at 5.0 times 10(6) km from the nucleus on March 25.6 UT, and moved about 2.0 times 10(6) km during 5 hr. The measured velocity along the axis of the ion tail was derived to be 99.2 +/- 0.3 km s(-1) , which is almost constant within the observational limit. We also measured the perpendicular motion of this knot to the axis, and identified rapid acceleration. The brightness of the knot decreased during the observation. We report on preliminary results of an analysis of this phenomenon, and discuss some characteristics in this paper.

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