List of natural satellites

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As of 2024, 6 out of the 8 known planets have natural satellites (or moons) and there are 285 known natural satellites with 12 natural satellites of the 7 generally agreed dwarf planets and 4 natural satellites of the 4 dwarf planet candidates each. In total, there are 301 natural satellites orbiting by large objects.

## **By Primary**

### **Mercury**

Mercury does not have any known natural satellites, since its gravity is not strong enough to orbit a natural satellite and its close proximity to the sun.

### **Venus**

Venus does not have any known natural satellites, since its gravity is not strong enough to orbit a natural satellite and its close proximity to the sun, although it may have one in the past, but as of 2024, there are no natural satellites discovered.

### **Earth**

Earth has 1 known natural satellite: Moon. Earth could potentially have moons inside Earth's hill sphere, but it have been too small to observe. Earth also has 2 temporary natural satellites: 2006 RH₁₂₀ and 2020 CD₃, but they aren't considered as permanent natural satellite; however, 2020 CD₃ will be included in the list, as its orbital data is collected before it was ejected out of Earth's hill sphere.

### **Mars**

Mars has 2 known natural satellites: Phobos and Deimos. These 2 were the only ones that discovered over 100 years ago.

### **Jupiter**

Jupiter is the fifth and the largest planet in the entire solar system that contains 95 known natural satellites. Jupiter's moons has 9 separate divisions of orbital groups that shares a different orbital characteristics per group. These are *Amalthea Group*, *Galilean Moons*, *Themisto Group*, *Himalia Group*, *Carpo Group*, *Valetudo Group*, *Ananke Group*, *Carme Group* and *Pasiphae Group*. Out of the 9 groups, Carme group has the most moons in a group, containing 30 known moons. **Note: Jupiter's count will likely change in the future as more observations and new discoveries gets better.**

### **Saturn**

Saturn is home to the most moons in the entire solar system at 146 and the first known planet to have over 100 known natural satellites. Saturn's 146 moons are divided into 11 orbital groups that shares a different orbital characteristics per group. These are *Shepherd Moons*, *Small Ring Moonlets*, *Large Ring Moonlets*, *Inner Moons*, *Alkyonides*, *Trojan Moons*, *Outer Moons*, *Inuit Group*, *Gallic Group*, *Norse Group* and *Outlier Prograde Moons*. Out of the 11 groups, The Norse group holds the most moons in a group containing 100 known moons and the first moon group to reach over 100 members. **Note: Saturn's count will likely change in the future as more observations and new discoveries gets better.**

### **Uranus**

Uranus has 27 known natural satellites. It is divided into 5 orbital groups: *Portia Group*, *Puck Group*, *Round Moons*, *Retrograde Irregular Moons* and *Prograde Irregular Moons*. Out of the 5 groups, The Portia group holds the most moons in a group having 9 known natural satellites, beating the Retrograde Irregular Moons by 1, and are all regular moons. **Note: Uranus' count will likely change in the future as more observations and new discoveries gets better.**

### **Neptune**

Neptune has 14 known natural satellites. It is divided into 3 orbital groups, much like Uranus. Like Uranus' Portia group, the Inner moons of Neptune has the most moons in a group containing 7 known moons (except Perdita, Puck and Mab). **Note: Neptune's count will likely change in the future as more more observations and new discoveries gets better.**

### **Dwarf Planets**

Out of the 9 generally agreed dwarf planets, 7 of which contains natural satellites, 2 of them containing more than 1. Ceres and Sedna are the only ones that does not contain one, although Sedna could potentially have small moons, but it needs more observations. Orcus has 1 moon: Vanth. Pluto has 5 moons: Charon, Styx, Nix, Kerberos and Hydra. Haumea has 2 moons: Hi'iaka and Namaka. Quaoar has 1 moon: Weywot. Makemake has 1 moon: S/2015 (136472) 1 (MK2). Gonggong has 1 moon: Xiangliu. And Eris has 1 moon: Dysnomia. There are also 4 other dwarf planet candidates that contain at least 1 natural satellite, and these are: 2003 AZ₈₄, Salacia (Actaea), Varda (Ilmarë) and 2013 FY₂₇.

## **List**

This list is provided with dozens of moons. If the moon is named in **Bold**, it means it is a round moon and if the moon is ***Bold and Italic*** at the same time, it means a round and bigger than any known dwarf planets. Orbital Period is set on days, Semi-major axis is set on kilometers and diameter is set on kilometers. Moons with "(r)" are considered retrograde (or moons having an inclination of 90° or higher).