NOTABLE ASTEROIDS & KBOS A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site Hidalgo (minor planet 944) Orbit of Hidalgo. Credit: NASA The asteroid with the largest known orbit, the second highest inclination to the ecliptic, and the second highest eccentricity. It was discovered by Walter Baade in 1920. Hidalgo, whose perihelion lies at the inner edge of the main asteroid belt and aphelion just beyond the orbit of Saturn, moves in a chaotic orbit and is considered by some to be a defunct comet. Diameter 30 km Spectral class D Semimajor axis 5.757 AU Perihelion 1.958 AU Aphelion 9.556 AU Eccentricity 0.656 Inclination 42.57° Period 13.7 years Related category    • NOTABLE ASTEROIDS, CENTAURS, AND KUIPER BELT OBJECTS Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP