Asteroid moon
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The asteroid 243 Ida and its moon Dactyl.
An Asteroid Moon is an asteroid that orbits or goes around another asteroid. Asteroid moons are quite rare. Only 2% of asteroids are thought to have moons.
To be an asteroid moon, an asteroid has to be smaller than the object it goes around. If they are roughly the same size they are called a binary pair.
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| Sun • Heliosphere |
Planets ☾ = moon(s) ∅ = rings |
Mercury | Venus | Earth ☾ | Mars ☾ | ||
| Jupiter ☾ ∅ | Saturn ☾ ∅ | Uranus ☾ ∅ | Neptune ☾ ∅ | ||||
| Dwarf planets | Ceres | Pluto ☾ | Haumea ☾ | Makemake | |||
| Eris ☾ | |||||||
| Small Solar System bodies |
Asteroids (minor planets) |
Groups and families: Vulcanoids · Near-Earth asteroids · Asteroid belt Jupiter Trojans · Centaurs · Neptune Trojans · Asteroid moons · Meteoroids · Pallas · Juno · Vesta · Hygiea · Interamnia · Europa |
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| See also the list of asteroids. | |||||||
| Trans- Neptunians |
Kuiper belt – Plutinos: Orcus · Ixion – Cubewanos: Varuna · Quaoar · Huya |
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| Scattered disc: Sedna | |||||||
| Comets | Periodic comets and non-periodic comets Damocloids · Oort cloud |
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| See also the list of solar system objects | |||||||
