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Chapter and Conference Paper
The Distant Satellites of Uranus and the Other Giant Planets
The steady improvement in our knowledge of the orbits of the two new Uranian satellites is described, including the roles of the 1984 prediscovery images and the 1998 recovery observations. The recognition of ...
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Chapter and Conference Paper
Comet Size Distributions and Distant Activity
We present the results of observations of distant comet nuclei as observed with the Keck II telescope during 1997 December. Our sample included 17 SP Jupiter-family comets, 3 Halley-family comets, and 1 dynami...
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Chapter and Conference Paper
Observations — Concluding Remarks
I must speak for all the professional astronomers here in saying that I am most impressed by the contributions made at this IAU Colloquium by amateur astronomers. I spoke earlier of the contacts between amateu...
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Chapter and Conference Paper
Amateur Astronomers and the IAU Central Bureau for Astronomical Telegrams and Minor Planet Center
Of all the sections of the International Astronomical Union the Central Bureau for Astronomical Telegrams is undoubtedly the one that most concerns amateur astronomers. Just about anybody in the world with at ...