Cis-Neptunian object

From Wikipedia, the free encyclopedia
Jump to: navigation, search

A cis-Neptunian object is, literally, any astronomical body found within the orbit of Neptune.[1] However, the term is typically used for those distant minor planets other than trans-Neptunian objects: that is, all sub-planetary bodies orbiting the Sun at or within the distance of Neptune, but outside the orbit of Jupiter.[citation needed] This includes the icy minor planets known as centaurs[2] and the Neptune trojans.[3][a]

Centaurs orbit the Sun between Jupiter and Neptune, often crossing the orbits of the large gas giants. There is an emerging sense[2] that the centaurs may simply be objects similar to scattered-disc objects that were knocked inwards from the Kuiper belt rather than outwards, making them cis-Neptunian rather than trans-Neptunian scattered-disc objects.



  1. ^ Remo, John L. (2007). Classifying Solid Planetary Bodies. New trends in astrodynamics and applications III. AIP Conference Proceedings, Volume 886, pp. 284-302.
  2. ^ a b J Horner; NW Evans; ME Bailey; DJ Asher (2003). "The Populations of Comet-like Bodies in the Solar System" (PDF). Retrieved 2007-06-29. 
  3. ^ a b "List Of Neptune Trojans". Minor Planet Center. Archived from the original on 2012-05-25. Retrieved 2010-10-27.