153 Hilda vs 3 Juno
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153 Hilda
153 Hilda is an asteroid in the outer main belt discovered by Johann Palisa on 2 November 1875 at the Austrian Naval Observatory in Pula. It gives its name to the Hilda group, a dynamical population in a 3:2 mean-motion resonance with Jupiter; Hilda itself has a P-type spectrum, a diameter of roughly 170 kilometers, and an orbital period of about 7.9 years.
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3 Juno
3 Juno is a main-belt asteroid discovered by German astronomer Karl Ludwig Harding on 1 September 1804. It was the third asteroid to be discovered, after Ceres and Pallas, and its name comes from Juno, the Roman goddess; the object helped establish the growing group of small Solar System bodies that were initially discussed alongside the known planets.
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