Ida is an asteroid in the Koronis family of the asteroid belt. It was discovered on 29 September 1884 by Austrian astronomer Johann Palisa. On 28 August 1993, Ida was visited by the uncrewed Galileo spacecraft while en route to Jupiter. Ida’s moon Dactyl was discovered by mission member Ann Harch in images returned from Galileo.
About 243 Ida in brief
Ida is an asteroid in the Koronis family of the asteroid belt. It was discovered on 29 September 1884 by Austrian astronomer Johann Palisa at Vienna Observatory. On 28 August 1993, Ida was visited by the uncrewed Galileo spacecraft while en route to Jupiter. Ida’s moon Dactyl was discovered by mission member Ann Harch in images returned from Galileo. It is the second asteroid visited by a spacecraft and the first found to have a natural satellite. Its orbit lies between the planets Mars and Jupiter, like all main-belt asteroids. Its surface is one of the most heavily cratered in the Solar System, featuring a wide variety of crater sizes and ages. It has an average diameter of 31. 4 km. It is irregularly shaped and elongated, apparently composed of two large objects connected together. Its reflection spectrum was measured on 16 September 1980 by astronomers David J. Tholen and Edward F. Tedesco as part of the eight-color asteroid survey. Its spectrum matched those of the asteroids in the S-type classification. Data returned from the flyby pointed to S- type asteroids as the source for the ordinary chondrite meteorites, the most common type found on the Earth’s surface. The remaining images of Ida were sent in February 1994, when the spacecraft’s proximity to the Earth allowed higher speed transmissions to be made. About 95% ofIda’s surface came into view during the probe’s flyby.
The second asteroid, Gaspra, to be imaged by the spacecraft, ShoAR, and later the NEAR and NEARAR missions of ShoAR and the ShoAR mission. In Greek mythology,Ida was a nymph of Crete who raised the god Zeus. In 1884, it was named by Moriz von Kuffner, a Viennese brewer and amateur astronomer, It was his 45th asteroid discovery. The asteroid was named after the nymph which inhabited Mount Ida in Greek mythology. Its orbital period is 4. 84 years, and its rotation period is four. 63 hours. The onboard imager observed Ida from a distance of 240,350 km to its approach of 2,390,390 km after a close approach in August 1993. Its mass was measured from 78 to 60 km during the Galileo flyby and revealed that it is depleted of metallic minerals. It share many characteristics with Ida, suggesting a common origin. The images returned by the Galileo probe provided new insights into the geology of S-style asteroids. The first five images were received in September 1993, at a resolution of 31–38–38 mp–38 at a altitude of 12,400 ms. During its second crossing, it flew by Ida on 28 August 1992 at a speed of 12.400 miles relative to the asteroid. The spacecraft’s closest approach to Ida after a flyby was in August 1992, when it came into a closer view of a view of the surface.
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