Satellite -----MAGNITUDES----- Diameter (km) Discoverers
Names/Designations B V R I For p=0.07
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Caliban XVI S/1997 U 1 21.9 60 Gladman, Nicholson, Burns, Kavelaars
Sycorax XVII S/1997 U 2 20.4 120 Nicholson, Gladman, Burns, Kavelaars
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Prospero XVIII S/1999 U 3 23.2 30 Holman, Kavelaars, Gladman, Petit, Scholl
Setebos XIX S/1999 U 1 23.3 30 Kavelaars, Gladman, Holman, Petit, Scholl
Stephano XX S/1999 U 2 24.1 20 Gladman, Holman, Kavelaars, Petit, Scholl
NOTES:
1. Satellite diameters are assuming albedos of 7 percent.
2. The Roman numbering of the satellites is based on the order in which their orbits reached a sufficient quality to be numbered by the International Astronomical Union.