what are the hilda trojan and greek asteroids
Hilda group
The Hilda or Hildian asteroids are a dynamical group of asteroids in a 3 : 2 orbital resonance with Jupiter . The namesake is the asteroid 153 Hilda . Hildas move in their elliptical orbits so that their aphelia put them opposite Jupiter ( at L ) , or 60 degrees ahead of or behind Jupiter at the L and L Lagrangian points . Over three successive orbits each Hilda asteroid approaches all of these three points in sequence . A Hilda 's orbit has a semi-major axis between 3.7 AU and 4.2 AU ( the average over a long time span is 3.97 ) , an eccentricity less than 0.3 , and an inclination less than 20 ° . Two collisional families exist within the Hilda group : the Hilda family and the Schubart family . The namesake for the latter family is 1911 Schubart . There are more than 1,100 known Hilda asteroids including unnumbered objects .
The Hilda or Hildian asteroids are a dynamical group of asteroids in a 3 : 2 orbital resonance with Jupiter . The namesake is the asteroid 153 Hilda . Hildas move in their elliptical orbits so that their aphelia put them opposite Jupiter ( at L ) , or 60 degrees ahead of or behind Jupiter at the L and L Lagrangian points . Over three successive orbits each Hilda asteroid approaches all of these three points in sequence . A Hilda 's orbit has a semi-major axis between 3.7 AU and 4.2 AU ( the average over a long time span is 3.97 ) , an eccentricity less than 0.3 , and an inclination less than 20 ° . Two collisional families exist within the Hilda group : the Hilda family and the Schubart family . The namesake for the latter family is 1911 Schubart . There are more than 1,100 known Hilda asteroids including unnumbered objects .