title: Radar observations of icarus.
abstract: Radar observations of Icarus were made in mid-June 1968, at the time of closest approach. From the data, it is estimated that the radius is between 0.3 and 0.6 kilometer and the rotation period between 1.5 and 3.3 hours. A set of round-trip Doppler shift measurements is given.
authors.forename: R M
authors.initials: RM
authors.lastname: Goldstein