Analysis of information sources in references of the Wikipedia article "243 Ida" in English language version.
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The Eos and Koronis families ... are entirely of type S, which is rare at their heliocentric distances ...Zellner, Ben; Tholen, David J.; Tedesco, Edward F. (March 1985). "The eight-color asteroid survey: Results for 589 minor planets". Icarus. 61 (3): 355–416. Bibcode:1985Icar...61..355Z. doi:10.1016/0019-1035(85)90133-2.
The Eos and Koronis families ... are entirely of type S, which is rare at their heliocentric distances ...Zellner, Ben; Tholen, David J.; Tedesco, Edward F. (March 1985). "The eight-color asteroid survey: Results for 589 minor planets". Icarus. 61 (3): 355–416. Bibcode:1985Icar...61..355Z. doi:10.1016/0019-1035(85)90133-2.
Nearly a month after a successful photo session, the Galileo spacecraft last week finished radioing to Earth a high-resolution portrait of the second asteroid ever to be imaged from space. Known as 243 Ida, the asteroid was photographed from an average distance of just 3,400 kilometers some 3.5 minutes before Galileo's closest approach on Aug. 28.Cowen, Ron (2 October 1993). "Close-up of an asteroid: Galileo eyes Ida". Science News. Vol. 144, no. 14. p. 215. ISSN 0036-8423.