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(meteorobs) First results from the visible spectroscopy of an outburst Ursid meteor
First results from the visible spectroscopy of an outburst Ursid meteor
(Dec. 24, 2000):
Observations of the December 22 Ursid outburst show that the relatively
fresh ejecta of comet 8P/Tuttle bear much resemblance in morphology to
the similarly fresh Leonid storm dust of comet 55P/Tempel-Tuttle.
Both show an early release of sodium atoms, relative to magnesium atoms,
thought to
be caused by a falling appart in many fragments after entering the Earth's
atmosphere
and thus exposing volatile minerals.
Further reading: http://www-space.arc.nasadot gov/~leonid/leonidnews30.html
or http://leonid.arc.nasadot gov/leonidnews30.html
Peter Jenniskens