Small Body

Cosma / Communication / Knowledge / Realm / Physical / Universe / Solar System / Small Body



Small Solar System Body (SSSB) is an object in the Solar System that is neither a planet, a dwarf planet, nor a natural satellite. The term was first defined in 2006 by the International Astronomical Union (IAU). This encompasses all comets and all minor planets other than those that are dwarf planets. Thus SSSBs are: the comets; the classical asteroids, with the exception of the dwarf planet Ceres; the trojans; and the centaurs and trans-Neptunian objects, with the exception of the dwarf planets Pluto, Haumea, Makemake, and Eris and others that may turn out to be dwarf planets. — Wikipedia

Minor Planet is an astronomical object in direct orbit around the Sun (or more broadly, any star with a planetary system) that is neither a planet nor exclusively classified as a comet. Before 2006, the International Astronomical Union (IAU) officially used the term minor planet, but during that year’s meeting it reclassified minor planets and comets into dwarf planets and small Solar System bodies (SSSBs). Minor planets include asteroids (near-Earth objects, Mars-crossers, main-belt asteroids and Jupiter trojans), as well as distant minor planets (centaurs and trans-Neptunian objects), most of which reside in the Kuiper belt and the scattered disc. — Wikipedia

Small Body (Encyclopædia Britannica)



Small Bodies of the Solar System (NASA Science)
Asteroids, Comets & Meteors (Jet Propulsion Laboratory, NASA)

Comets, Meteors & Asteroids (Ask an Astronomer, Cornell University)
Asteroids, Comets and Other Small Worlds (Planetary Society)

Minor Planets (Wolfram Alpha)

Anton Petrov (WhatdaMath, YouTube Channel)
Physical Properties of Trans-Neptunian Object (20000) Varuna (David C. Jewitt1 and Scott S. Sheppard, The Astronomical Journal, The American Astronomical Society)
20000 Varuna (Wikipedia)




Library of Congress # QB400 Small Solar System bodies (UPenn Online Books)

WorldCat, Library of Congress, UPenn Online Books




NASA Learning Objects: Small Body Data-Base Search Engine (MERLOT)
Asteroids, Comets, and Meteorites (Lunar & Planetary Institute)



Minor Planet Center (International Astronomical Union)


Small Solar System Body (
Asteroids, Comets and Meteors News (Science Daily)



Small Solar System Body (



Here are links to pages about closely related subjects.

Knowledge Realm


Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle

Universe (Astronomical Instrument)
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Our Neighborhood
Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.