In the most recent 'Discover' magazine's "Year in Science" special issue, on page 58 the Laser assisted discovery of UB313 (Xena) and its moon is listed as the #2 Top science story of 2005. They also have a nice picture of the laser.

And then there is this from Cnn.com:

(SPACE.com) -- Two objects lurking near Jupiter and once considered rocky asteroids have turned out to be comets made up mostly of ice and dirt.

Using the Keck II Laser Telescope in Hawaii, astronomers found that the two objects, 617 Patroclus and its companion, Menoetius, had a density of only 0.8 grams per cubic centimeters -- only a third that of rock.

Most likely, the researchers say, Patroclus and Menoetius are comets, which are typically composed mainly of water ice and therefore much less dense than asteroids.

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