How does Lutetia compare to the other asteroids and comets visited by spacecraft?
This excellent collage was prepared by Emily Lakdawalla at the Planetary Society (USA) and shows the relative sizes of all asteroids visited by spacecraft as of June 2010.
All asteroids and comets visited by spacecraft as of June 2010
The total of four comets and nine asteroid systems (including ten separate bodies) that have been examined up close by spacecraft are shown here to scale with each other (100 meters per pixel, in the fully enlarged version). Most of these were visited only briefly, in fly-by missions, so we have only one point of view on each; only Eros and Itokawa were orbited and mapped completely.
Credits for original images: Ida, Dactyl, Braille, Annefrank, Gaspra, Borrelly: NASA / JPL / Ted Stryk. Steins: ESA / OSIRIS team. Eros: NASA / JHUAPL. Itokawa: ISAS / JAXA / Emily Lakdawalla. Mathilde: NASA / JHUAPL / Ted Stryk. Lutetia: ESA / OSIRIS team / Emily Lakdawalla. Halley:: Russian Academy of Sciences / Ted Stryk. Tempel 1: NASA / JPL / UMD. Wild 2: NASA / JPL
More information: http://www.planetary.org/blog/article/00002585/