Editing Plutino (section)

{{Short description|In astronomy, a dynamical group of trans-Neptunian objects}}
{{about-distinguish-text|the dynamical group|[[plutoid]]s or [[pluton]]s}}

In [[astronomy]], the '''plutinos''' are a [[List of minor-planet groups|dynamical group]] of [[trans-Neptunian object]]s that orbit in 2:3 [[orbital resonance|mean-motion resonance]] with [[Neptune]]. This means that for every two orbits a plutino makes, Neptune orbits three times. The dwarf planet [[Pluto]] is the largest member as well as the namesake of this group. The next largest members are {{dp|Orcus}}, {{mpl|208996|2003 AZ|84}}, and {{dp|Ixion}}. Plutinos [[Astronomical naming conventions#Minor planets|are named after]] mythological creatures associated with the underworld.

Plutinos form the inner part of the [[Kuiper belt]] and represent about a quarter of the known [[Kuiper belt object]]s. They are also the most populous known class of [[resonant trans-Neptunian object]]s ''(also see adjunct box with hierarchical listing)''. The first plutino after Pluto itself, [[(385185) 1993 RO]], was discovered on September 16, 1993.