This chart shows the differences between Prospero and Uranus. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

	Prospero	Uranus
Discovered By	Matthew J. Holman, John J. Kavelaars, Brett J. Gladman, Jean-Marc Petit, and Hans Scholl	William Herschel
Date of Discovery	18 July 1999	13 March 1781
Average Orbit Distance	16,276,800 km	2,870,658,186 km
Perihelion/Perigee (closest)	9,041,762 km	2,734,998,229 km
Aphelion/Apogee (farthest)	23,511,838 km	3,006,318,143 km
Equatorial Radius	25.0 (assuming an albedo of 0.07) km	25,362 km
Equatorial Circumference	157.1 km	159,354.1 km
Volume	65,450 km3	68,334,355,695,584 km3
Mass	98,912,116,584,414,800 kg	86,810,300,000,000,000,000,000,000 kg
Density	1.5 g/cm3	1.270 g/cm3
Surface Area	7,853.98 km2	8,083,079,690 km2
Equatorial Surface Gravity	0.011 m/s2	8.87 m/s2
Escape Velocity	83 km/h	76,968 km/h
Orbit Period (Length of Year)	5.416481862 sidereal years	84.016846 sidereal years
Mean Orbit Velocity	2,043.2 km/h	24,477 km/h
Orbit Eccentricity	0.4445	0.04725744
Orbit Inclination to Ecliptic	151.83	0.77 degrees
Orbit Circumference	97,014,053.99 km	18,026,802,831 km