Cressida, Portia, and Ophelia

Cressida is the fourth moon in order of distance from Uranus. It is named after the daughter of Calchas, a character in Shakespeare's play Troilus and Cressida and is also known as Uranus IX. Cressida was discovered by Stephen P. Synnott from images sent back by Voyager 2 on January 9, 1986, and was given the temporary designation S/1986 U3.


discovery 1986, by Voyager 2
semimajor axis 61,780 km (38,400 miles)
diameter 92 × 74 km (57 × 46 miles)
orbital period 0.464 day (11 hr 8 min.)
orbital eccentricity 0.00023
orbital inclination 0.038°
visual albedo 0.07 (assumed)