A minor-planet group is a population of minor planets that share broadly similar orbits. Members are generally unrelated to each other, unlike in an asteroid family, which often results from the break-up of a single asteroid. It is customary to name a group of asteroids after the first member of that group to be discovered, which is often the largest.
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👉 List of minor-planet groups in the context of Hilda family
The Hilda family (001) is an ancient collisional asteroid family of at least 409 known asteroids, named for its largest member, the 170-kilometre (110 mi)-across asteroid 153 Hilda. It lies within the larger dynamical group of Hilda asteroids, a group of asteroids in the 3:2 orbital resonance with Jupiter. All members of the family are dark P-type asteroids with albedos of around 0.06. Another asteroid family in the Hilda dynamical group is the Schubart family, named for its largest member, 1911 Schubart.
An asteroid family is a group of physically related asteroids usually created by a collision with an original larger asteroid, with the fragments continuing on similar orbits to the original. This is distinct from a dynamical group in that the members of a dynamical group only share similar orbits because of gravitational interactions with planets, which concentrate asteroids in a particular orbital range. Members of the Hilda family are both part of the wider Hilda dynamical group, and fragments of 153 Hilda. The family is considered a non-catastrophic asteroid family because 153 Hilda, its largest member, makes up nearly 3/4 of the family's total mass, rather than simply being the largest of a number of fragments each making up a small fraction of the original destroyed asteroid.
In this Dossier
- ⭐ Core Definition: List of minor-planet groups
- 👉 List of minor-planet groups in the context of Hilda family
- List of minor-planet groups in the context of Plutino
- List of minor-planet groups in the context of Solar System object
- List of minor-planet groups in the context of Hilda asteroid
- List of minor-planet groups in the context of Asteroid family
- List of minor-planet groups in the context of Schubart family
List of minor-planet groups in the context of Plutino
In astronomy, the plutinos are a dynamical group of trans-Neptunian objects that orbit in 2:3 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 Orcus, Achlys, and Ixion. Plutinos 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 objects. They are also the most populous known class of resonant trans-Neptunian objects (also see adjunct box with hierarchical listing). The first plutino after Pluto itself, (385185) 1993 RO, was discovered on 16 September 1993.
List of minor-planet groups in the context of Solar System object
The following is a list of Solar System objects by orbit, ordered by increasing distance from the Sun. Most named objects in this list have a diameter of 500 km or more.
- The Sun, a spectral class G2V main-sequence star
- The inner Solar System and the terrestrial planets
- Mercury
- Venus
- Earth
- Mars
- Asteroids in the asteroid belt, between the orbits of Mars and Jupiter
- Ceres, a dwarf planet
- Vesta
- Pallas
- Hygiea
- Europa (asteroid)
- Davida
- Sylvia
- Asteroids number in the hundreds of thousands. For longer lists, see list of exceptional asteroids, list of asteroids, or list of Solar System objects by size.
- A number of smaller groups distinct from the asteroid belt
- The outer Solar System with the giant planets, their satellites, trojan asteroids and some minor planets
- Jupiter
- Saturn
- Uranus
- Rings of Uranus
- Complete list of Uranus's natural satellites
- Uranus trojan (2011 QF99)
- Uranus-crossing minor planets
- Neptune
- Non-trojan minor planets
- Trans-Neptunian objects (beyond the orbit of Neptune)
- Kuiper-belt objects (KBOs)
- Plutinos
- Orcus, a dwarf planet
- Pluto, a dwarf planet
- Complete list of Pluto's natural satellites
- Ixion
- Achlys
- Twotinos
- Cubewanos (classical objects)
- Plutinos
- Scattered-disc objects
- Detached objects
- (612911) 2004 XR190
- 2012 VP113 (possibly inner Oort cloud)
- Sedna, a dwarf planet (possibly inner Oort cloud)
- Oort cloud (hypothetical)
- Kuiper-belt objects (KBOs)
List of minor-planet groups in the context of Hilda asteroid
The Hilda asteroids (adj. Hildian) are a dynamical group of more than 6,000 asteroids located beyond the asteroid belt but within Jupiter's orbit, in a 3:2 orbital resonance with Jupiter; that is, while Jupiter orbits twice, the Hildas orbit three times. The namesake is the asteroid 153 Hilda.
Hildas move in their elliptical orbits in such a fashion that they arrive closest to Jupiter's orbit (i.e. at their aphelion) just when either one of Jupiter's L5, L4 or L3 Lagrange points arrives there. On their next orbit their aphelion will synchronize with the next Lagrange point in the L5–L4–L3 sequence. Since L5, L4 and L3 are 120° apart, by the time a Hilda completes an orbit, Jupiter will have completed 360° − 120° or two-thirds of its own orbit. A Hilda's orbit has a semi-major axis between 3.7 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.
List of minor-planet groups in the context of Asteroid family
An asteroid family is a population of asteroids that share similar proper orbital elements, such as semi-major axis, eccentricity, and orbital inclination. The members of the families are thought to be fragments of past asteroid collisions. An asteroid family is a more specific term than asteroid group whose members, while sharing some broad orbital characteristics, may be otherwise unrelated to each other.
List of minor-planet groups in the context of Schubart family
The Schubart family (002) is a collisional asteroid family of at least 353 known asteroids, named for its largest member, the 67-kilometre (42 mi)-across asteroid 1911 Schubart. It lies within the larger dynamical group of Hilda asteroids, a group of asteroids in the 3:2 orbital resonance with Jupiter. Like its namesake, it's named after the largest member, 1911 Schubart. All members of the family are dark P-type asteroids with albedos of around 0.04. Another asteroid family in the Hilda dynamical group is the Hilda family, named for its largest member, 153 Hilda.
An asteroid family is a group of physically related asteroids usually created by a collision with an original larger asteroid, with the fragments continuing on similar orbits to the original. This is distinct from a dynamical group in that the members of a dynamical group only share similar orbits because of gravitational interactions with planets, which concentrate asteroids in a particular orbital range. Members of the Schubart family are both part of the wider Hilda dynamical group, and fragments of a single original asteroid. The family is considered a catastrophic asteroid family because even its largest member, 1911 Schubart, does not make up a majority of the family's mass.