It is 3,500 kilometers
The Moons semi-major axis is 384,399 km The Moons mean diameter is 3474.2 km. So about 110 moons would fill this gap.
12742 km / 3474 km = 3.67
The diameter of the Moon is 3474.2 km, the diameter of the largest Uranian moon (Titania) is 1578 km. So none of Uranus' moons are bigger.
Mars has two moons,Phobos has a diameter of 22.2 kmDeimos has a diameter of 12.6 km
Ganymede, one of Jupiter's moons, has a diameter of about 5,268 km (3,273 miles), making it the largest moon in the solar system.
Jupiter, the biggest planet in our astonishing solar system. Jupiter has 60+ known moons. But there are four main moons, Io, Europa, Callisto and Ganymede. Io is 3,630 km in diameter and is 421,600 km away from Jupiter. It is very active, and has constant volcanic eruption. Europa is 3,138 km in diameter and is 670,900 km away from Jupiter. Astronomers think that underneath its crust, it may harbor an ocean. Ganymede is 5,262 km in diameter - the largest moon in our Solar System - and is 1,070,000 km away from Jupiter. Also, this moon could potentially harbor an ocean beneath its crust. Callisto is 4,800 km in diameter and is 1,883,800 km away from Jupiter.
Saturn has 62 moons. 53 of them have names. I'll list the top 5 in terms of size... 1. Titan 5150 KM in diameter 2. Rhea 1527 KM in diameter 3. Lapetus 1470 KM in diameter 4. Dion 1123 KM in diameter 5. Tethys 1062 KM in diameter
Phobos is 22.2 km in diameter on average (27×21.6×18.8) Deimos is 12.6 km in diameter on average (10×12×16)
The Moon is one-fourth the diameter of the Earth, so that means that four Moons would fit into the diameter of the Earth. This does not mean that the Moon is one-fourth the size of the Earth; the Earth is significantly larger.
There are a number of small asteroids that act as "moons" for somewhat larger asteroids. But only one asteroid, the dwarf planet Ceres, is as large as the larger moons of the major planets. In some cases, there are co-orbiting pairs of asteroids, one not vastly larger than the other. Notable Main Belt asteroids that have small moons are: * 243 Ida, an oblong asteroid about 59 km long, has a small moon named Dactyl (about 1.6 km diameter). * 22 Kalliope, about 235 km long and 80 km in radius has a relatively large moon, Linus (about 28 km). * 87 Sylvia, about 385 km long has two moons Sylvia I-Romulus and Sylvia II-Remus, each about 11 km in diameter.
Yes, much smaller. Earth is much larger than even the largest moons in the solar system. The moons of Mars are tiny as far as moons go. Phobos has a mean diameter of 22 km (13.6 miles) while Deimos has a mean diameter of 12 km (7.5 miles). So the Martian moons are smaller than some cities.
Larissa has an average diameter (it is not round because it is too small) of 194 Km.